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279 results on '"Bocchetta, Patrizia"'

7. Functional biochar derived from Desmostachya bipinnatafor the application in energy storage/conversion devices

Author

Mehrotra, Smriti, Gupta, Meenal, Dujearic-Stephane, Kouao, Kumar, Ashwani, Singh, Pushpa, Bharti, Bharti, Mathuriya, Abhilasha Singh, Bocchetta, Patrizia, and Kumar, Yogesh

Abstract

Biochar amalgamated from grass Desmostachya bipinnatawas used for supercapacitors and microbial fuel cell applications. Herein, the nitrogen driven simple carbonization method at 800 C was used without activating agent for preparation of biochar material. The crystalline state, morphology, structural porosity, thermal properties, and vibrational surface area of the biochar were examined using X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FE-SEM), Raman, Brunauer–Emmett–Teller (BET), thermogravimetric analysis/derivative thermogravimetry (TGA/DTG), and X-ray photoelectron spectroscopy (XPS), and the surface functional groups containing oxygen are assessed. The electrodes in supercapacitor and microbial fuel cells are developed from the functionalized biochar material. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) studies with 1 M H2SO4electrolytes and 1-ethyl-3-methylimidazoliu thiocyanate (EMImSCN) ionic liquid were conducted to compare the electrochemical properties of the fabricated supercapacitor. The primed electrodes unveiled augmented capacitance in1M H2SO4electrolyte as ~ 26 F/g in comparison to EMImSCN ionic liquid as ~ 22 F/g. The microbial fuel cell (MFC) emboding the primed electrode as cathode material exhibited a maximum open circuit voltage (OCV) about 819 ± 25 mV and a power density maximum of 0.78 ± 0.09 mW/m3. Significant removal of 77.14% was achieved in chemical oxygen demand (COD) of the effluent with an average effluent concentration of 1423 ± 25 mg/l. On the basis of the obtained results, we can predict that Desmostachya bipinnatacan be a very suitable precursor for preparing carbon material for its use as electrode material for electrochemical energy system (energy conversion and energy storage) devices.

Published
2024
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9. Experimental Investigations on Highly Conducting Solid Bio‐Polymer Electrolytes Based on Latex of Calotropis gigantea Plant.

Author

Taneja, Neha, Bocchetta, Patrizia, Kumar, Ashwani, Gupta, Pallavi, Gupta, Meenal, Singh, Pushpa, Beniwal, Bharti, Agrawal, Namrata, and Kumar, Yogesh

Subjects
*POLYELECTROLYTES, *SOLID electrolytes, *CONDUCTING polymer films, *LATEX, *CALOTROPIS, *IONIC conductivity
Abstract

The study has prepared highly conducting polymer electrolyte films using solution cast technique with poly(vinylidene fluoride‐co‐hexafluoropropylene) PVDF‐HFP, mixture of ethylene carbonate (EC), and propylene carbonate (PC) as plasticizer and latex of Calotropis gigantea (CGL) as an ionic source. In this study, four films are prepared using PVDF‐HFP:CGL in ratio 1:1 with the increasing concentration of EC+PC as 1, 2, 3, and 4 M named as 1:1:1, 1:1:2, 1:1:3, 1:1:4. The prepared polymer electrolyte is examined by polarized optical microscopy (POM), elemental dispersive X‐ray technique (EDX), and complex impedance spectroscopy. EDX and POM are studied for the surface morphology of all prepared samples and to investigate the porous nature of films. The enhancement in ionic conductivity occurs due to CGL and increasing amount of EC‐PC. Conductivity of highest composition (1:1:4) polymer electrolyte film is found to be ≈10−3 S cm−1. The optimized polymer electrolyte film is considered as a promising candidate for application in supercapacitors. [ABSTRACT FROM AUTHOR]

Published
2024
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14. Lane Line Detection and Object Scene Segmentation Using Otsu Thresholding and the Fast Hough Transform for Intelligent Vehicles in Complex Road Conditions

Author

Javeed, Muhammad Awais, primary, Ghaffar, Muhammad Arslan, additional, Ashraf, Muhammad Awais, additional, Zubair, Nimra, additional, Metwally, Ahmed Sayed M., additional, Tag-Eldin, Elsayed M., additional, Bocchetta, Patrizia, additional, Javed, Muhammad Sufyan, additional, and Jiang, Xingfang, additional

Published
2023
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24. A New MBH Adduct as an Efficient Ligand in the Synthesis of Metallodrugs: Characterization, Geometrical Optimization, XRD, Biological Activities, and Molecular Docking Studies

Author

Ishfaq, Shazia, primary, Nisar, Shazia, additional, Iqbal, Sadaf, additional, Ali, Saqib, additional, Ali, Syed Tariq, additional, Din, ElSayed, additional, Alsaiari, Norah Salem, additional, Dahlous, Kholood A., additional, Javed, Muhammad Sufyan, additional, and Bocchetta, Patrizia, additional

Published
2022
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25. Development of Efficient and Recyclable ZnO–CuO/g–C3N4 Nanocomposite for Enhanced Adsorption of Arsenic from Wastewater

Author

Khan, Qudrat Ullah, primary, Begum, Nabila, additional, Rehman, Zia Ur, additional, Khan, Afaq Ullah, additional, Tahir, Kamran, additional, Tag El Din, El Sayed M., additional, Alothman, Asma A., additional, Habila, Mohamed A., additional, Liu, Dahai, additional, Bocchetta, Patrizia, additional, and Javed, Muhammad Sufyan, additional

Published
2022
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27. Synthesis and Characterization with Computational Studies of Metal Complexes of Methyl 2-((4-cyanophenyl)(hydroxy) methyl)acrylate: A New Biologically Active Multi-Functional Adduct

Author

Ishfaq, Shazia, primary, Nisar, Shazia, additional, Qayum, Amtul, additional, Iqbal, Sadaf, additional, Fatima, Nasreen, additional, Alasmary, Fatmah Ali, additional, Almalki, Amani Salem, additional, El Din, ElSayed M. Tag, additional, Javed, Muhammad Sufyan, additional, and Bocchetta, Patrizia, additional

Published
2022
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39. Electrochemical Corrosion of Titanium and Titanium Alloys Anodized in H2SO4 and H3PO4 Solutions

Author

Jáquez-Muñoz, Jesús Manuel, primary, Gaona-Tiburcio, Citlalli, additional, Chacón-Nava, José, additional, Cabral-Miramontes, Jose, additional, Nieves-Mendoza, Demetrio, additional, Maldonado-Bandala, Erick, additional, Delgado, Anabel D., additional, Flores-De los Rios, Juan Pablo, additional, Bocchetta, Patrizia, additional, and Almeraya-Calderón, Facundo, additional

Published
2022
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42. A New CuSe-TiO 2 -GO Ternary Nanocomposite: Realizing a High Capacitance and Voltage for an Advanced Hybrid Supercapacitor.

Author

Sajjad, Muhammad, Khan, Abdul Jabbar, Eldin, Sayed M., Alothman, Asma A., Ouladsmane, Mohamed, Bocchetta, Patrizia, Arifeen, Waqas Ul, Javed, Muhammad Sufyan, and Mao, Zhiyu

Subjects
HIGH voltages, SUPERCAPACITOR electrodes, ENERGY storage, AQUEOUS electrolytes, NANOCOMPOSITE materials, SUPERCAPACITORS, ELECTRODE testing, ELECTRIC capacity
Abstract

A high capacitance and widened voltage frames for an aqueous supercapacitor system are challenging to realize simultaneously in an aqueous medium. The severe water splitting seriously restricts the narrow voltage of the aqueous electrolyte beyond 2 V. To overcome this limitation, herein, we proposed the facile wet-chemical synthesis of a new CuSe-TiO2-GO ternary nanocomposite for hybrid supercapacitors, thus boosting the specific energy up to some maximum extent. The capacitive charge storage mechanism of the CuSe-TiO2-GO ternary nanocomposite electrode was tested in an aqueous solution with 3 M KOH as the electrolyte in a three-cell mode assembly. The voltammogram analysis manifests good reversibility and a remarkable capacitive response at various currents and sweep rates, with a durable rate capability. At the same time, the discharge/charge platforms realize the most significant capacitance and a capacity of 920 F/g (153 mAh/g), supported by the impedance analysis with minimal resistances, ensuring the supply of electrolyte ion diffusion to the active host electrode interface. The built 2 V CuSe-TiO2-GO||AC-GO||KOH hybrid supercapacitor accomplished a significant capacitance of 175 F/g, high specific energy of 36 Wh/kg, superior specific power of 4781 W/kg, and extraordinary stability of 91.3% retention relative to the stable cycling performance. These merits pave a new way to build other ternary nanocomposites to achieve superior performance for energy storage devices. [ABSTRACT FROM AUTHOR]

Published
2023
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43. Development of Efficient and Recyclable ZnO–CuO/g–C 3 N 4 Nanocomposite for Enhanced Adsorption of Arsenic from Wastewater.

Author

Khan, Qudrat Ullah, Begum, Nabila, Rehman, Zia Ur, Khan, Afaq Ullah, Tahir, Kamran, Tag El Din, El Sayed M., Alothman, Asma A., Habila, Mohamed A., Liu, Dahai, Bocchetta, Patrizia, and Javed, Muhammad Sufyan

Subjects
ARSENIC removal (Water purification), ARSENIC, NANOCOMPOSITE materials, ADSORPTION (Chemistry), ADSORPTION capacity, SEWAGE
Abstract

Arsenic (III) is a toxic contaminant in water bodies, especially in drinking water reservoirs, and it is a great challenge to remove it from wastewater. For the successful extraction of arsenic (III), a nanocomposite material (ZnO–CuO/g–C3N4) has been synthesized by using the solution method. The large surface area and plenty of hydroxyl groups on the nanocomposite surface offer an ideal platform for the adsorption of arsenic (III) from water. Specifically, the reduction process involves a transformation from arsenic (III) to arsenic (V), which is favorable for the attachment to the –OH group. The modified surface and purity of the nanocomposite were characterized by SEM, EDX, XRD, FT–IR, HRTEM, and BET models. Furthermore, the impact of various aspects (temperatures, pH of the medium, the concentration of adsorbing materials) on adsorption capacity has been studied. The prepared sample displays the maximum adsorption capacity of arsenic (III) to be 98% at pH ~ 3 of the medium. Notably, the adsorption mechanism of arsenic species on the surface of ZnO–CuO/g–C3N4 nanocomposite at different pH values was explained by surface complexation and structural variations. Moreover, the recycling experiment and reusability of the adsorbent indicate that a synthesized nanocomposite has much better adsorption efficiency than other adsorbents. It is concluded that the ZnO–CuO/g–C3N4 nanocomposite can be a potential candidate for the enhanced removal of arsenic from water reservoirs. [ABSTRACT FROM AUTHOR]

Published
2022
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45. Methods of synthesis and specific properties of graphene nano composites for biomedical and related energy storage applications

Author

Rastogi Sarushi, Kumar Yogesh, Sharma Vasudha, Singh Pushpa, Gupta Meenal, Bocchetta Patrizia, Rastogi, S., Sharma, V., Gupta, M., Singh, P., Bocchetta, P., and Kumar, Y.

Subjects
Materials science, Nano composites, Graphene, Biomedical Engineering, Pharmaceutical Science, Medicine (miscellaneous), Bioengineering, Nanotechnology, Properties of graphene composite, Graphene composite, Energy storage, Biomedical device, law.invention, law, Synthesis of graphene composites, Graphene supercapacitor, Graphene biosensor, Biotechnology
Abstract

The concept of graphene in a carbon framework has given rise to enormous improvements to the specific properties of materials. Notably, the combination of graphene with polymeric, metallic and ceramic materials has significantly improved mechanical resistance, electrical and thermal conductivity, and thermal stability of the resulting composite material. In this review, we discuss comprehensive literature on graphene-based composite materials for biomedical and related energy storage applications with emphasis to the synthesis techniques and improved properties of the nanocomposite materials due to graphene addition.

Published
2021

50. Ultrafast Studies of ZrTe 3 by Transient Absorption Spectrometer.

Author

Ahmed, Shakeel, Rui, Wang, Altaf, Faizah, Khan, Jahanzeb, Bocchetta, Patrizia, and Zhang, Han

Subjects
DECAY constants, HOT carriers, SPECTROMETERS, ABSORPTION, TRANSIENTS (Dynamics), CONDUCTION bands
Abstract

Two-dimensional (2D) tri-TMDCs carrier dynamics provide a platform for studying excitons through Ultrafast Pump-Probe Transient Absorption Spectroscopy. Here we studied the ZrTe3 nanosheets (NTs) exciton dynamics by transient absorption (TA) spectrometer. We observed different carrier dynamics in the ZrTe3 NTs sample at different pump powers and with many wavelengths in the transient absorption spectrometer. The shorter life decay constant is associated with electron-phonon relaxation. Similarly, the longer-life decay constant represents the long live process that is associated with charge separation. The interactions between carrier-phonons at nanoscale materials can be changed by phonons quantum confinements. The hot carrier lifetime determined the strength of carrier phonon interactions. The value of fast decay in the conduction band is due to carrier relaxation or the carrier gets trapped due to surface states or localized defects. The value of slow decay is due to the recombination of surface state and localized defects processes. The lifetime declines for long wavelengths as size decreases. Whereas, during short wavelength-independent decay, carrier characteristics have been observed. TA spectroscopy is employed to investigate insight information of the carrier's dynamical processes such as carrier lifetime, cooling dynamics, carrier diffusion, and carrier excitations. The absorption enhanced along excitons density with the increase of pump power, which caused a greater number of carriers in the excited state than in the ground state. The TA signals consist of trap carriers and (electron-hole) constituents, which can be increased by TA changes that rely on photoexcitation and carrier properties. [ABSTRACT FROM AUTHOR]

Published
2022
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