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To obtain a high-performance heterogeneous photo-catalyst, herein, the hetero-structured ZnIn2S4-NiO@MOF (ZNM) nano-sheets are designed and prepared by partial pyrolysis of nickel-based MOFs (Ni-MOF) combined with the low-temperature solvo-thermal method. The results indicate that the NiO nanoparticles, produced by partial pyrolysis of the Ni-MOF, have a high density of the surface active sites with limited aggregation, which act as a co-catalyst to capture photo-induced charge carriers. In addition, the morphology and structure of Ni-MOF nano-sheets were preserved in ZNM, which is beneficial to the reduction of the conduction barrier for the photo generated electron-hole pairs. With the synergetic advantages of co-catalyst and unique two-dimensional hetero-structure, ZNM nano-sheets exhibited significantly improved activity for photo-catalytic hydrogen production.

The development of efficient and stable non-noble metal-based catalysts for low-temperature methane combustion is extremely important and still a profound challenge. Herein, high-performance Ni1–xZ...

In this paper, a three-dimensional (3D) hierarchical ZnO structure consisting of nanosheets modified with ultrafine NiO particles was synthesized via a facile two-step chemical precipitate method. Various techniques characterized the as-synthesized ZnO/NiO composites and pure ZnO. The p-NiO/n-ZnO junctions formed between adjacent ZnO and NiO nanoparticles, improving the gas sensing performance. The ZnO/NiO composite with the Ni:Zn atomic ratio of 7.42:100 exhibited the best isopropanol sensing properties. Compared to pure ZnO, it showed high selectivity and sensitivity (Ra/Rg = 221.3 toward 400 × $${10}^{-6}$$ isopropanol), fast response rate (less than 10 s), short recovery time, and simultaneously low operating temperature. Also, the ZnO/NiO composite exhibited a wide sensing range (1 × $${10}^{-6}$$ –1000 × $${10}^{-6}$$ ) to isopropanol and processed good long-term stability. The experimental results suggested the potential application in fabricating efficient isopropanol sensors using this ZnO/NiO composite. The enhanced isopropanol sensing mechanism is also discussed in charge transfer between heterojunctions, surface area, and surface defects.

In this study, pristine nickel oxide (NiO) and Zn2+ doped NiO nanoparticles (NPs) are synthesised through the chemical precipitation method. Samples were analysed by TG/DTA, XRD, UV-DRS spectroscop...

The properties of structural and optical of pure and doped nano titanium dioxide (TiO2) films, prepared using chemical spray pyrolysis (CPS) technique, with different nanosize nickel oxide (NiO) concentrations in the range (3-9)wt% have been studied. X-Ray diffraction (XRD) technique where using to analysis the structure properties of the prepared thin films. The results revealed that the structure properties of TiO2 have polycrystalline structure with anatase phase. The parameters, energy gap, extinction coefficient, refractive index, real and imaginary parts were studied using absorbance and transmittance measurements from a computerized ultraviolet visible spectrophotometer (Shimadzu UV-1601 PC) in the wavelengths range (300-800)nm. Optical properties of TiO2 affected by the adding of NiO impurity where the transmittance increased as NiO concentration increased but with more adding the transmittance returned to decrease again. It was found the extinction coefficient, refractive index, real and imaginary parts values decreased with increasing doping percentage up to 7% and then increases occur one more again at 9%. Energy gap values increased after doping with NiO where the values lies in the range was 3.31 to 3.51 eV .

NiO nanoparticle was synthesized by a sol-gel method with three different pH values namely pH=1, 7 and 11, and then calcined at temperature of 450 ᵒC. The influence of different pH values on the physical properties of NiO nanoparticles were investigated by a particle size analyzer (PSA), field emission scanning electron microscope (FESEM) and X-ray diffractometer (XRD). Structural analysis confirmed that a cubic structure of NiO nanoparticle was obtained without any secondary phase for NiO powders prepared with pH=1, while the peak of secondary phase (Ni) appeared for NiO powders prepared with pH= 7 and 11. Morphological observation showed that the NiO nanoparticles prepared with pH=7 and 11 tend to form more agglomerates compared to one prepared with pH=1. The average diameter of NiO nanoparticles with pH 1, 7 and 11 were approximately in the range of 19-26 nm, 21-28 nm, and 24-30 nm, respectively. NiO powder that was synthesized with pH=1 was further used to prepare composite anode of NiO Nps-BaCe0.54Zr0.36Y0.1O2.95 (BCZY) powder. Unfortunately a composite of NiO Nps-BaCeO3-BaZrO3 was obtained instead of BCZY and governed by agglomerates with size in the range of 70-300 nm.

Different types of scaling methods to characterize spin-glass freezing in random magnetic systems have been discussed in literature. An earlier proposed scaling method for imaginary part of ac susceptibility using a different approach is presented for 5-nm NiO particles. This work supports for the spin-glass freezing in nanoparticle systems at lower temperature.

In the commented paper, there are some questionable data which should be explained or corrected by the Authors, Thangamani et al. In this comment, I have tried to pinpoint incorrect data or inconsistencies and to verify the correctness of the data presented in the crystallographic part of the paper.

This study, optimise the elimination of Bromophenol blue (BPB) dye from aqueous solutions using NiO nanoparticles and mesoporous graphene nano sheets/NiO(GNS/NiO) nanocomposite.Co-precipitation and...

Enzyme-linked immunosorbent assays (ELISAs) are tests that uses antibody recognition and enzyme catalytic activity to identify a substance, and they have been widely used as a diagnostic tool in the clinic.

Polyvinyl alcohol (PVA) and Chitosan (CS)-based novel composites were prepared using solution casting technique by introducing graphite oxide (GO) and nickel oxide (NiO) as nanofillers. The structural, thermal and mechanical properties of PVA/CS/GO/NiO nanocomposites were investigated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The dielectric and electromagnetic interference (EMI) shielding properties of synthesized nanocomposites were also investigated. The addition of dual nanofillers in the PVA/CS blend resulted in improved thermal stability of nanocomposites through the interaction of nanofillers with OH groups of polymer matrices. The DMA results displayed higher storage and loss modulus at low temperature for nanocomposite with 1.5/15 wt% of GO/NiO loading. The maximum values of dielectric constant and dielectric loss obtained are 1315.5 and 11.1 at the low-frequency region, respectively. The absorption dominated EMI shielding effectiveness (SE) was observed with a maximum EMI SE value of 12 dB for nanocomposite film containing 3.0/30 wt% of GO/NiO as compared to EMI SE value of 0.3 dB for PVA/CS blend in Ku-band (12–18 GHz) region. The electrical network formation by GO and NiO in the polymer matrix resulted in an improved EMI SE which further emphasizes the potential use of these nanocomposite films as an effective EMI shielding material.

Three-dimensional porous NiO/Ni(OH)2 composites consisting of NiO nanoparticles and amorphous Ni(OH)2 nanosheets were prepared successfully for supercapacitors. NiO nanoparticles were dispersed uni...

Nickel oxide nanoparticles with the size of 218, 73, and 50 nm were added to Ni-P electroless coating to create NiO@Ni-P nanoparticle reinforced composite coating on a brass substrate. The nanopart...

Using Quinolin-65 (Q-65) and Violantrone (V-79) as model molecules for polar heavy hydrocarbons and resins, the nanosize effects of NiO nanoparticles on the competitive molecular adsorption on nano...

The particle size-dependent surface optical (SO) phonon and magnon modes of NiO nanoparticles were extensively studied using room-temperature confocal Raman spectroscopy. The required nanoparticles...

The extensive use of nanoparticles (NPs) in various industrial and household products pose a threat of their release into the environment. Plants being sessile are prone to be directly affected by these nanomaterials in polluted soils, which may represent possible risks to food safety and human health. In the present study, we compared the phytotoxic effects of metal oxide NPs namely nickel oxide (NiO), copper oxide (CuO) and zinc oxide (ZnO) NPs at four varying concentrations (100, 250, 500 and 1000 mg/L) on in-vitro grown seedlings of Abelmoschus esculentus (okra). All the NPs tested demonstrated a suppressed plant growth in a concentration-dependent manner which was evidenced from the repression of shoot and root length. A decrease in chlorophyll content was recorded in the NP-treated plants. Anthocyanin contents, total phenolic and total flavonoid contents were significantly altered in the NP-treated plants. Moreover, reactive oxygen species (ROS) generation was monitored in the roots of NP-treated plants using 4-nitro blue tetrazolium chloride (NBT) and 3, 3′-diaminobenzidine (DAB) staining, demonstrated an increase in ROS production in a dose-dependent manner in plants exposed to all three NPs. Enhanced ROS and malondialdehyde (MDA) production was recorded in A. esculentus seedlings when exposed to NPs. Among the three metal oxide NPs compared in the study, NiO NPs were found to be more toxic than CuO and ZnO ones.

The impacts of SDS-coated NiO nanoparticles, temperature and nanoparticles concentration were investigated on thermal conductivity of nanofluid under permanent and alternative magnetic fields. Three different temperatures of 40, 60 and 80 °C and nanoparticles concentrations in the range of 0.01 to 1%were chosen. The results showed that thermal conductivity of nanofluid varied with increasing nanofluid temperature. Moreover by increasing the volume load in the base-fluid, thermal conductivity increased remarkably. Moreover, by adding SDS to the nanofluid, the stability of the nanoparticles in water improved. In addition, thermal conductivity increased slightly with volume fraction up to 0.1 vol%. However, with more nanoparticles concentration from 0.1 vol% to 1%, the alterations in the thermal conductivity were more tangible. Moreover, the alternative magnetic field led to greater effect on the thermal conductivity. Both alternating and permanent magnetic fields could well help to increase the thermal conductivity of nanofluid.

We have prepared the flexible and transparent symmetric solid-state supercapacitors based on the nanofiber-based composite (NFC) electrodes decorated with NiO nanoparticles which exhibit better ele...

Novel gas sensor devices, based on biomaterial apple pectin film (APN) doped with NiO, were fabricated for the first time using a solution processing technique. The device was then annealed in a microwave chamber. The structural, elemental, and surface morphology of the device was investigated, using TEM, XPS, and AFM, respectively. The as-fabricated film sensor possessed a superior sensing performance regarding ethanol gas, compared to the pure apple pectin film sensor. The response of the device was recorded at a maximum efficiency of 161. For a 10 ppm concentration of ethanol gas at an operational temperature of 250 °C, the response time was 1.379 s. Nevertheless, the sensing mechanism for the sensor device is also described thoroughly.

With structural miniaturization down to the nanoscale, some detectable parameters of materials no longer remain constant. For NiO nanoparticles example, Raman shift and Néel temperature increase while optical band gap decreases with increasing the nanoparticle size. Herein, we developed the analytic models to describe the size dependence of these above-mentioned seemingly uncorrelated parameters for NiO nanoparticles, based on the average coordination number-dependent cohesive energy model. Consistency between our theoretical predictions and the corresponding experimental results not only verified the accuracy of our developed models but also provided insight into the essentiality of cohesive energy in describing the effect of size on the materials properties of NiO nanoparticles.

This work sought to draw a comparison between the photocatalytic proficiency of NiO nanoparticles (NPs) for the degradation of Methylene blue (MB) and Rhodamine B (Rh B) dye. The NiO NPS were synthesized by a facile straightforward chemical route by utilizing NiCl2 and NaHCO3 as a precursor. The morphological characteristics of the synthesized NiO NPs have been characterized by using SEM. In addition XRD, FTIR and EDX analysis were also carried out to investigate the crystalline size, functional group and elemental composition of the NPs. The NiO NPs were subsequently used for the photocatalytic degradation of the MB and Rh B in the presence of the visible light irradiation. For evaluation of photocatalytic proficiency, the influence of various key parameters viz. pH of the dye solution, initial dye concentration, Irradiation time and amount of the catalyst were investigated. The extent of photocatalytic degradation of MB and Rh B was found to be 98.7 and 80.33% at pH 2 and 10 respectively. The kinetic investigation of photocatalytic degradation followed a pseudo-first-order rate kinetics for MB and Rh B dye with rate constant 4.6 × 10−1 and 3.6 × 10−2. Additionally, the synthesized NiO NPs was used for the antimicrobial activity against the few gram-positive and gram-negative microorganisms. Highlights The NiO nanocrystalline semiconducting photocatalyst was successfully synthesized by a facile straightforward chemical route by utilizing NiCl2 and NaHCO3 as a precursor. Novel simple chemical route synthesis at room temperature. First time report a combine study of photocatalytic degradation of Methylene blue and Rhodamine B dye by using NiO as a photocatalyst. Also, Antimicrobial study was examined which clearly indicate the biocompatibility of synthesized NiO nanoparticles.

Acetylene (C2H2) gas concentration is a key parameter in transformer monitoring. In current work, the selective acetylene sensors which based on flower-like ZnO structures with NiO nanoparticles were successfully fabricated. The NiO–ZnO composites were synthesized by two-step hydrothermal method. And various of characterization analyses had been applied to the exploration of crystal structure and the p-n heterojunction. According to the systematic gas sensitivity tests, the response of NiO–ZnO (5%) to 50 ppm C2H2 was 15.23 at 200 °C whereas the response of pure ZnO was 4.1 in the same condition. In addition, the response value of NiO–ZnO (5%) to 50 ppm C2H2 was 3.6 times to 50 ppm H2. Such a good gas-sensing property of NiO–ZnO composites is due to p-n heterojunction and high catalytic activity of NiO.

Gas-sensing characteristics of thick films prepared using NiO nanoparticles (NPs) have been investigated. NiO NPs were synthesized via a facile and cost-effective chemical coprecipitation method. N...

Two dimensional materials have been widely identified as promising microwave absorbers, owing to their large surface area and abundant interfaces. Here, a novel laminated and magnetic composite derived from Mxene was designed and successfully synthesized via facile hydrothermal oxidization of nickel ion intercalated Ti3C2. Highly disordered carbon sheets were obtained by low temperature hydrothermal oxidization, and the in-situ produced TiO2 and NiO nanoparticles embedded closely between them. This layered hybrid exhibits excellent microwave absorbing performance with an effective absorbing bandwidth as high as 11.1 GHz (6.9–18 GHz) and 9 GHz (9–18 GHz) when the thickness is 3 and 2 mm, respectively. Besides the high dielectric loss, magnetic loss and ohmic loss of the composite, the amorphous nature of obtained carbon sheets and multi-reflections between them are believed to play a decisive role in achieving such superior microwave absorbing performance.

Nanoparticle-technology was employed to address the challenges of asphaltene precipitation during oil production. Fe3O4 and NiO nanoparticles were synthesized and characterized. Asphaltene was extr...

Synthesis of efficient antibacterial agents has become extremely important due to the emergence of antibiotic resistant bacteria. This is especially true for Pseudomonas aeruginosa, an opportunistic pathogen having ability to rapidly develop resistance to multiple classes of antibiotics thus limiting the efficacy of antibiotics approved for clinical use. Aluminum (Al)-doped NiO nanoparticles are of special interest due to their enhanced antipseudomonal properties at certain Al-doping levels. The composite hydroxide mediated (CHM) approach was opted for the synthesis of pure nickel oxide (NiO) and Al-doped nickel oxide (Ni1–xAlxO; x = 5, 10, 15, 20, 25, and 30 wt.%) nanoparticles. X-ray diffraction (XRD) technique was used for structural analysis of these nanoparticles. Morphology and elemental composition of these nanoparticles were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy, respectively. The optical properties were investigated by using UV-visible spectroscopy and Kubelka-Munk Theory and Tauc relation were employed for energy bandgap calculation of these nanoparticles. The antibacterial activity of representative Al-doped NiO nanoparticles was assessed on multidrug-resistant clinical P. aeruginosa strains. The agar well and disc-diffusion methods were used to assess the antibacterial efficacy of (Al)-doped NiO compared to pure NiO nanoparticles. Interestingly, a gradual increase in the antibacterial activity was observed with increasing Al-doping concentration and the highest antibacterial activity was observed at x = 15 wt.% Al-doping concentration. The antipseudomonal efficacy of Ni1–xAlxO nanoparticles was comparable to aztreonam antibiotic, primarily used for Gram-negative bacterial infections. Hence, it is proposed that these nanoparticles can be used for coating surgical devices, bone prostheses, medical implants, antibacterial clothing and in pharmaceutical formulations as burn ointments to produce the antimicrobial effect.

Sensitive and selective detection of harmful gas is an important task in environmental monitoring. In this work, a gas sensor based on cataluminescence (CTL) for detection of acetaldehyde was designed by using nano-NiO as the sensing material. The sensor shows sensitive response to acetaldehyde at a relatively low working temperature of 200 &deg, C. The linear range of CTL intensity versus acetaldehyde concentration is 0.02&ndash, 2.5 mg/L, with a limit of detection of 0.006 mg/L at a signal-to-noise ratio of three. Mechanism study shows that electronically excited CO2 is the excited intermediate for CTL emission during the catalytic oxidation of acetaldehyde on the NiO surface. The proposed sensor has promising application in monitoring acetaldehyde in residential buildings and in the workplace.

Ni-ZrO2 catalysts supported on CNT synthesized by sequential and co-impregnation were tested in the CO2 methanation reaction. The catalysts were characterized using different physico-chemical techniques including BET surface area analysis, TGA, H2-TPR analysis, CO2-TPD analysis, XRD analysis, TEM-EDS analysis and XPS. Both samples were found to be active in the CO2 methanation; however, the catalyst prepared by co-impregnation was notably less active and selective to CH4 than the catalyst synthesized by sequential impregnation method. The characterization results gave significant insight on the disposition of active phases in CNT surface. The catalyst prepared by co-impregnation showed NiO nanoparticles surrounded by ZrO2 in core-shell structures that growth over the CNT, reducing reactant access to Ni and Ni – ZrO2 interface. Additionally, TEM analysis of this catalyst prepared by sequential impregnation showed NiO nanoparticles available and deposited either on the surface or next to the ZrO2 nanoparticles, increasing the extent of the Ni – ZrO2 interface thus improving the catalytic performance.

NiO nanoparticles were fabricated by sol-gel route using ammonium hydroxide and nickel nitrate as precursors. The NiO nanoparticles were calcinated at 400 °C and 1000 °C. The nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), thermogravimetry analysis/differential thermal analysis (TGA/DTA). The structural properties were evaluated by X-ray diffraction (XRD). XRD confirmed the formation of well-crystallized and high purity NiO phase. The XRD showed that the peaks were sharpened and the crystallite size increased as the calcination temperature increased. The average crystallite size ranged from 12 nm to 20 nm, when calcined at temperatures 400 °C and 1000 °C, respectively. Fourier transform infrared spectroscopy (FT-IR) revealed the chemical composition and confirmed the formation of NiO nanoparticles. The nanoparticles showed paramagnetic behavior.

In the present work, NiO nanoparticles based on Andrographis paniculata (leaf extract) were prepared through the microwave-assisted method. The obtained nanoparticles were analyzed using XRD, FTIR,...

Carbon dioxide reforming of methane to syngas was investigated over a series of MgO promoted Ni/CNT catalysts. MgO played a critical role in improving the catalytic performance of Ni/CNT. The results showed that the addition of MgO strengthened the interaction of Ni and interior surface of CNT. Highly dispersed nickel particles with small size (less than 4.5 nm) were also observed in MgO modified CNT. Otherwise, the NiO nanoparticles were facilely reduced over the catalyst prepared with a narrow size of CNT, as shown in H2-TPR. The reaction tests demonstrated that the Ni-based catalyst with an addition of MgO and narrow size of CNT exhibited better catalytic activity. Furthermore, the lifetime of Ni-based catalyst was prolonged effectively after adding MgO, attributed to the stabilization and dispersion of Ni particles and the effective restraint on the gasification of CNT.

Purpose: The purpose of this article is to synthesized NiO nanostructures by sol-gel method and characterized them for use in dye sensitized solar cells. For this purpose, a paste prepared from nanoparticles was prepared and screen printed on a glass substrate with the FTO layer. Design/methodology/approach: Nickel oxide nanoparticles was synthesized with participation of nickel (II) nitrate hexahydrate and citric acid. The prepared nanopowder has been subjected to structural analysis using a transmission electron microscope (TEM). Scanning Electron Microscopic (SEM) images were taken with a Zeiss Supra 35. Qualitative studies of chemical composition were also performed using the Energy Dispersive Spectrometer (EDS). The structure of nickel oxide was investigated by X-ray crystallography. An average crystallite size were calculated using Scherrer method and Williamson-Hall analysis. Light harvesting efficiency LHE was calculated from measured absorbance. Findings: The uniform nickel oxide nanoparticles with spherical shape were successfully produced by sol-gel method. The diameter of the as prepared nanoparticles does not exceed 25 nm which is confirmed by the XRD and TEM analysis. The light harvesting efficiency of the electrode in the entire studied range it’s over 90%. Therefore the NiO can be an attractive alternative to the most commonly used TiO2. Research limitations/implications: The next step in the research will be to investigate the ZnO/NiO composite on the properties of the photoelectrode of dye sensitized solar cell. Practical implications: The unique properties of produced NiO nanostructural materials have caused their interest in such fields as medicine, transparent electronics and photovoltaics. Originality/value: The NiO nanoparticles were prepared using sol-gel method and then effectively used in the photoanode of dye sensitized solar cell.

Carbon-based hole conductor-free perovskite solar cells (PSCs) have attracted great attention due to the simple process, low cost and relatively high stability. However, the power conversion efficiency (PCE) is considerably lower than that of the standard PSCs using spiroOMeTAD as hole-conductor material and Au (or Ag) as counter electrodes. Herein, by means of incorporating p-type NiO nanoparticles into carbon electrodes, the PCE of the hole conductor-free PSCs was significantly boosted to 13.26% from 10.29% of that based on pure carbon electrode, because of the enhancement of hole transfer. In addition, the carbon-based hole conductor-free PSCs showed 85% of the initial efficiency after 800 h in ambient atmosphere. The results indicate that the p-type NiO nanoparticles can enhance hole transfer from perovskite into carbon electrodes, and the carbon electrodes can prevent the water in the air to improve stability. While the PSCs using Spiro-OMeTAD as hole conductor and Ag as electrodes have slightly lower PCE of 13.24% and lower stability. Hence, it is an effective strategy of incorporating p-type nanomaterials into carbon electrodes to enhance the carbon-based hole conductor-free PSCs.

This paper presents a comparative experimental study between sol-gel and sonochemical approaches for the synthesis of SnO2 and NiO nanoparticles. In addition, the doping effect on the structural, optical properties and the photocatalytic activity of the synthesized oxides was studied. The XRD results revealed the high purity of the prepared oxides and the well incorporation of the dopant elements into the host structure. Morphological characterization by HR-TEM showed ultrafine nanoparticles with an average size

NiO intercalated reduced graphene oxide nanocomposites (rGO/NiO NC’s) with different amounts of NiO nanoparticles (NP’s) were fabricated via solvothermal technique. NH3 gas sensors was measured at room temperature. The rGO/NiO NC’s appeared uniformly distributed NiO NP’s anchored to both sides of the rGO sheets. The NH3 gas sensing performance based on these rGO/NiO NC’s exhibited excellent both fast response and recovery times when exposed to 20 – 100 ppm of NH3. In addition, increasing the amount of NiO NP’s has an effect to the gas response ability, the response time and recovery time due to the enhancement of the active adsorption sites. Moreover, the 20% rGO/NiO NC’s presented a significant gas response of 4.14% to 100 ppm of NH3, taking 290 and 166 s for response time and recovery time, respectively. Besides, the rGO/NiO NC’s have an excellent long-term stability. Therefore, the rGO/NiO NC’s in this study can be efficiently used for NH3 detection at room temperature. From these results, they showed that the combination of NiO NP’s with the rGO would be a promising strategy for enhancing the NH3 sensing performance of metal oxide semiconductor (MOS) based devices at room temperature.

International audience; The present protocol reports the ultrasound assisted synthesis of NiO nanoparticles(NPs) using benzylamine as a base and different types of cyclodextrins (CDs) as capping agents. The use of α-CD, β-CD or γ-CD leads to different morphologies of NiO NPs. In particular, NiO nanosheets obtained using β-CD as the capping agent. The synthesized NPs were characterized by FEG-SEM, TEM, XRD and EDS analysis. They showed high catalytic activity towards synthesis of different trisubstituted imidazoles under solvent free conditions. In addition, NiO NPs could be recycled and reused consecutively up to four recycle runs without much loss of their catalytic activity.

Prompt development of electronic devices and sensors raised the requirement for design/fabrication of advanced energy sources capable of providing considerable amount of energy for consuming platforms through practical nanotechnological approaches. For this aim, we have developed a highly active 2D nanostructure consisted of reinforced conductive polypyrrole (PPy) with decorated reduced graphene oxide (rGO) with hybrid metal oxide complex of Ni/W (PPy-G-Ni-W) toward supercapacitor applications. The hybrid 2D platform showed remarkable specific capacitance of 597 F.g(-1) and 557 F.g(-1) using CV and GCD analyses, respectively, through using three-electrode system. The developed supercapacitor exhibited fantastic stability upon maintaining 98.2% of its total performance after 5000 charge-discharge cycles. Likewise, the applicable two-electrode device using same electrode configurations composed of PPy-G-Ni-W//PPy-G-Ni-W showed specific capacitances of 361 F.g(-1) and 342 F.g(-1) at scan rate and current density of 2 mV.s(-1) and 0.5 A.g(-1) using CV and GCD techniques, respectively. Outcome of optimum supercapacitance configuration consisted of two-electrode system exhibits ideal energy density of 14.4 Wh.kg(-1) at power density of 275 W.kg(-1). More importantly, the device preserved 96.4% of its total specific capacitance after 5000 charge-discharge cycles which highlighting the excellent capacitive capability along with ultra-stability of the developed platform toward real energy applications.

Series of glass samples with composition (72.5-x)TeO2-15MgO-10Na2O-2.5Nd2O3-xNiO where 1.0 ≤ x ≤ 2.5 mol% are prepared using melt quenching method. The glasses are characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The XRD spectra confirmed the amorphous nature of prepared glasses. TEM images manifest the existence of NiO NPs which are homogeneously distributed in the glass matrix. The magnetization M(H) curve reveals that the glass displays an anomalous hysteresis behavior at room temperature. It is observed that M(H) is dependent on the NiO content. The initial curve of magnetization lies positively as a function of the magnetic field under 1000 H (O.e).