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Currently, the advancement in energy storage technology is a worldwide-based vital challenge, so researchers focused on the development and design of promising electrode materials for energy storage equipment. Perovskite oxide and transition metal selenide nanocomposites can achieve better cycle stability, efficient electric conductivity, high capacity, excellent redox reaction, and inattentive flexibility as electrode materials for energy storage devices and supercapacitor applications. Herein, we present the designed, fabricated, and electrochemical properties of MnSe-supported SrZrO 3 nanocomposite via the Pechini method that exhibited more efficient capacitive performance than pristine SrZrO 3 and MnSe. The result of electrochemical testing indicates that the SrZrO 3 –MnSe nanocomposite electrode possessed a battery-type pseudocapacitive nature and displayed a boosted specific capacitance of 1204 Fg-1 at a 5 mV/s scan rate in aqueous 1 M KOH solution under a three-electrode setup and maintained 95.2% retention after 3000th cycles. It also showed a higher electrochemical active surface area (1680.5 cm2), higher energy density (40 Wh/Kg), long-term cyclic stability performance, and enhanced rate capability compared to other prepared products. As a result, these findings have shown that SrZrO 3 –MnSe nanocomposite can be considered as potential electrode materials and might have emerging applications in commercial products for energy storage devices and supercapacitors. [ABSTRACT FROM AUTHOR]

In this study, single-doped (cobalt (Co), neodymium (Nd)), and co-doped (Co/Nd) ZnO thin films were fabricated through the hydrothermal method on a silicon substrate (100) and investigated structural, morphological, and optical characteristics. In this work, tunable bandgap engineering of single-phase Co/Nd co-doped ZnO nanorods was reported to be controlled through variation of dopant concentrations. The concentration of neodymium varies as 4, 8, and 12 % by weight, while cobalt is fixed up to 4 %. XRD confirms the phase purity and high crystalline nature of the prepared nanorods. The physical structural parameters such as-fabricated nanorods were investigated in detail. Furthermore, Scherrer, Williamson-Hall (W–H), and size-strain plot (SSP) methods were used to investigate the crystallite size and lattice strain. The optical parameters like absorbance (A), transmittance (%T), energy bandgap (E g), skin depth (δ), optical density (D opt), optical conductivity (σ opt), Urbach energy (Eu), and extinction coefficient (k), were investigated by UV–vis spectra. This study shows that grown films are suitable for modern optoelectronic applications. • Development of Co/Nd co-doped ZnO thin film on silicon (100) substrate. • Nanorods grown on the surface of the substrate. • Significant effect of Co and Nd concentration on ZnO optical properties. • Redshift in energy bandgap occurs at 12 % Nd doping. • The grown films are suitable for optoelectronic applications. [ABSTRACT FROM AUTHOR]

During the past few years, single‐atom catalysts (SACs) have attracted considerable attention in electrolysis due to their outstanding catalytic performance and efficient atomic utilization. SACs exhibit a simple structure, high catalytic activity, consistent scaling relationships for single sites, and low metal content but their practical applications are still limited. Dual single‐atom catalysts (DACs), which feature excellent selectivity, high atomic utilization efficiency, and remarkable stability, are emerging as new frontiers in heterogeneous electrocatalysis. They increase catalytic activity by promoting synergistic effects between metal‐active sites. In this paper, we present a comprehensive overview of the latest developments in dual‐atom catalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). In addition, we explore the differences between homonuclear and heteronuclear configurations, the emergence of single/dual‐site metal catalysts, and the methods currently used for their synthesis. Lastly, this review discusses several perspectives for advancing the development of dual‐atom catalysts for OER and ORR electrocatalysis. [ABSTRACT FROM AUTHOR]

One of the most often utilized hydroperoxides in an array of oxidation strategies is tert‐butyl hydroperoxide (tBuOOH, TBHP). The key reasons for rising utility of TBHP are its low cost, environmental friendliness, high efficiency, and ability to replace hazardous or rare heavy metal oxidants. In this sexennial update, we concisely and critically discussed the applications of TBHP in heterocyclic ring formations starting from 2018 to date. Merits and demerits of its utility, scope of a synthetic organic transformation along with mechanistic logistics are the key features of this review. [ABSTRACT FROM AUTHOR]

The most recent synthetic methods to produce chromeno[2,3-d]pyrimidine derivatives from 2015 onwards are outlined, and this mini-review is divided into different chapters according to the type of the reaction. [ABSTRACT FROM AUTHOR]

This study addresses the critical issue of removing copper(II) ions from water using an eco-friendly approach with natural biomaterials. Alginate, a natural polysaccharide, is employed as the primary adsorption material. The study involves the conversion of alginate into nanoparticles, and a ternary blend is prepared by mixing alginate nanoparticles with carboxymethyl cellulose and polyethylene glycol (AL-NPs/CMC/PEG). The blend's morphological and structural transformations have been comprehensively investigated using techniques such as DLS, FT-IR, XRD, TGA, and SEM. Batch experiments were conducted systematically to investigate crucial parameters, such as contact time (60–300 min), initial copper concentration (62.5 ppm–1000 ppm), solution pH (2–8), and adsorbent dosage (1–5 g). The results obtained are highly encouraging, revealing an impressive 80.9 % efficiency in the removal of copper ions. The acquired experimental data were then subjected to analysis with Langmuir and Freundlich, isotherm, as well as pseudo-first and pseudo-second-order kinetics studies. The outcomes from these isotherm and kinetics models indicated a favorable fit with the Freundlich isotherm, suggesting a strong affinity between the adsorbent and the metal ions. Furthermore, the kinetic studies revealed that the adsorption process closely adheres to pseudo-second-order kinetics, underlining the efficiency and reliability of the adsorption process. From desorption studies, 0.1 M HCl was an extremely effective eluant when compared to HNO 3 and EDTA. It could be reused three time with appreciate efficiency. The research underscores the potential for an environmentally sustainable solution to address the persistent environmental challenge posed by copper ion contamination. [Display omitted] • Impressive 388.45 mg g−1 Cu(II) adsorption capacity. • Exceptional thermal stability for heavy metal removal. • Eco-friendly and cost-effective with efficient desorption. [ABSTRACT FROM AUTHOR]

Rice husk, a plentiful agricultural waste, is a natural and environmentally friendly silica reservoir. In this study, a hydrothermal synthesis was employed to produce silica/polypyrrole nanocomposites, with the primary objective of developing corrosion-resistant materials. The nanocomposites are comprehensively characterized using XRD, FTIR, FESEM, and electrochemical studies. The results confirmed the successful formation of a silica/polypyrrole nanocomposite and revealed that the adsorption of polypyrrole molecules onto silica clusters controls the formation of larger silica nanoparticles. Pure silica exhibits spherical particles ranging from 500 to 1 μm. A low concentration of polypyrrole results in nanoparticles with dimensions ranging from 100 to 200 nm, while a higher concentration leads to reduced silica nanoparticles with sizes 10–20 nm. Aggregation of spherical nanoparticles is more prominent in silica/polypyrrole nanocomposites than pure silica nanoparticles. The nanocomposites of silica/polypyrrole, namely SP-1, SP-2, and SP-3, demonstrated significantly higher corrosion resistance (Rct) values of 36613 Ω, 44536 Ω, and 49060 Ω, respectively, in comparison to the pure silica (19540 Ω). The corrosion rates of pure silica, SP-1, SP-2, and SP-3 were determined to be 1.2687 mm/yr, 0.4715 mm/yr, 0.4681 mm/yr, and 0.3042 mm/yr, respectively. Silica exhibits remarkable chemical stability and exceptional corrosion resistance, whereas polypyrrole is a conducting polymer endowed with distinctive electrical characteristics. These constituents can be synergistically combined within a nanocomposite matrix, enhancing corrosion resistance. The synthesized nanocomposite exhibits considerable promise as a corrosion-resistant coating agent, presenting a sustainable remedy for corrosion mitigation in different industrial contexts. [Display omitted] • Hydrothermal synthesis of silica/polypyrrole nanocomposite. • Rice husk biowaste was used as a silica source. • Improved corrosion protection due to synergistic effect of silica/polypyrrole. • A sustainable and cost-effective method for corrosion protection. [ABSTRACT FROM AUTHOR]