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Using a simple and inexpensive sol-gel synthesis technique, Nd and Cd doped copper chromite spinel nanoparticles (MxCu1-xCr2O4) with x=0.2, 0.4, 0.6, and 0.8 were investigated. The crystal structure, elemental composition, nanoparticles nature, and bandgap of the synthesized nanoparticles were determined using XRD, EDS, SEM, Raman spectroscopy, and Photoluminescence. As prepared calcined at 750°C for four hours, resulting in an increase in average grain size from 37nm to 41nm, as demonstrated by XRD results. XRD tells us about the crystal size and dislocation density of samples. The value of 2???? for the XRD patterns is ranging from 25 to 55 . The band gap is calculated from the PL spectra and is 4.96 eV for the parent compound. When we doped elements with different concentrations in parent compound, the value of band gap decreases to 2.43 eV for Neodymium and 2.42eV for Cadmium. Similarly, SEM results show that the structure of pure copper chromites is tetragonal, and that after doping with other compounds, the structure will change according to the characteristics of Nano particles. In the PL spectra, four peaks are obtained: one at 347nm, one at 380nm, one at 500nm, and one at 600nm.EDS demonstrated that Cadmium and Neodymium was successfully doped in copper chromite and completely merged

This paper describes the synthesis of spinel copper Chromites (CuCr2O4) and doped Strontium copper chromite Nano-Crystalline using the sol gel method. The sample was calcined at various temperatures, including 750°C for the best results. Citric acid is a substance used to keep Nanoparticles from clumping together. The average particle size of nanoparticles was determined using powder x-ray diffraction, which revealed that as the sintered temperature is raised, the crystal size increases from 37 nm to 47 nm more. The sample was sintered at 750?C in furnace for 4 hours resulting in an increase in average grain size from 37nm to 47 nm measured using scanning Electron microscopy. The (124) phase of copper chromate having reference number 34-0424 JCPDS number obtained at 750°C with lattice parameter values 6.03?A and 7.8?A. The crystallite size is estimated to be between 37 and 47 nanometers. Similarly, SEM results show that the structure of pure copper chromites is tetragonal, and that after doping with other compounds, the structure will change according to the characteristics of Nano particles. In the PL spectra, four peaks are obtained: one at 347nm, one at 380nm, one at 500nm, and one at 600nm The EDX reading demonstrates that all of the required elements are present in the sample, with no additional impurity peaks. This demonstrates that this is a pure and successful synthesis. This also demonstrates that this is my unique and original work.

Nanoparticles of nickel-doped iron chromite (Fe1-xNixCr2O4) with composition x = 0.2-0.8 have been prepared by the sol–gel method using citric acid as a complexing agent. X-ray diffraction (XRD) re...

Innovation in design and fabrication of energy storage materials has triggered a swift development in capacitive materials. In this regard, two-dimensional grapheme-based spinal metal oxide nanocomposites exhibit quite substantial capacitive potential. Moreover, heteroatom-incorporated graphene nanocomposites improvise the electronic significance of conducive materials. For purpose, copper chromite nanoparticles embedded on graphene oxide (CuCr2O4/GO) were developed via co-precipitation method as an efficient energy storage material. CuCr2O4 was prepared by simple sol–gel route, whereas GO was synthesized by modified Hummer’s method. Structural crystallinity was analyzed by X-ray diffraction analysis, structural morphology and elemental weight composition indicated by scanning electron microscopy and energy-dispersive spectroscopy, respectively. Bond formation in CuCr2O4/GO composite was reflected by Raman band shifts. The photoluminescence measurements were taken for estimation of bandgap. Charge transfer resistance (Rct) and electrochemical active surface area were obtained from electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), respectively. Specific capacitance of the as-synthesized nanocomposites was calculated via CV measurements when peak current was observed varying the scan rate in both acidic and basic media. Maximum capacitance of 370.5 Fg−1 achieved corresponded to 0.1 M H2SO4 aqueous electrolyte, which is an indication of capacitive energy storage application of as-synthesized nanocomposite. Therefore, it can be conferred that the as-synthesized CuCr2O4/GO material could be an effective capacitive material for energy storage applications.

Various preparation and application methods of copper chromites catalyst have recently been extensively discussed. According to all discussions, copper chromites is a versatile catalyst that not only catalyses many processes of national programmed and commercial importance, all of which are related to defense and space research, but also finds a lot of application in the most concerned worldwide, such as environmental pollution control. Copper chromites catalysts have many useful applications in the production of drugs, clean energy, and agro chemicals. Different synthesis methods are presented to prepare doped Zinc Copper chromites, demonstrating a clear understanding of the dependence of catalytic activity. This sample was created using a simple, eco-friendly sol gel method and characterized using various techniques such as EDS, SEM, UV, Raman spectroscopy, and Photoluminescence. Several parameters influence sample techniques. This sample was sintered in a furnace at 750°C for 4 hours. Zinc was successfully doped in copper chromites and emerged completely, according to EDS.

MXene/Ag2CrO4 nanocomposite was synthesized effectively by means of superficial low-cost co-precipitation technique in order to inspect its capacitive storage potential for supercapacitors. MXene was etched from MAX powder and Ag2CrO4 spinel was synthesized by an easy sol-gel scheme. X-Ray diffraction (XRD) revealed an addition in inter-planar spacing from 4.7 Å to 6.2 Å while Ag2CrO4 nanoparticles diffused in form of clusters over MXene layers that had been explored by scanning electron microscopy (SEM). Energy dispersive X-Ray (EDX) demonstrated the elemental analysis. Raman spectroscopy opens the gap between bonding structure of as-synthesized nanocomposite. From photoluminence (PL) spectra the energy band gap value 3.86 eV was estimated. Electrode properties were characterized by applying electrochemical observations such as cyclic voltammetry along with electrochemical impedance spectroscopy (EIS) for understanding redox mechanism and electron transfer rate constant Kapp. Additionally, this novel work will be an assessment to analyze the capacitive behavior of electrode in different electrolytes such as in acidic of 0.1 M H2SO4 has specific capacitance Csp = 525 F/g at 10 mVs−1 and much low value in basic of 1 M KOH electrolyte. This paper reflects the novel synthesis and applications of MXene/Ag2CrO4 nanocomposite electrode fabrication in energy storage devices such as supercapacitors.

MXene/Ag2CrO4 nanocomposite was synthesized effectively by means of superficial low-cost co-precipitation technique in order to inspect its capacitive storage potential for supercapacitors. MXene was etched from MAX powder and Ag2CrO4 spinel was synthesized by an easy sol-gel scheme. X-Ray diffraction (XRD) revealed an addition in inter-planar spacing from 4.7 Å to 6.2 Å while Ag2CrO4 nanoparticles diffused in form of clusters over MXene layers that had been explored by scanning electron microscopy (SEM). Energy dispersive X-Ray (EDX) demonstrated the elemental analysis. Raman spectroscopy opens the gap between bonding structure of as-synthesized nanocomposite. From photoluminence (PL) spectra the energy band gap value 3.86 eV was estimated. Electrode properties were characterized by applying electrochemical observations such as cyclic voltammetry along with electrochemical impedance spectroscopy (EIS) for understanding redox mechanism and electron transfer rate constant Kapp. Additionally, this novel work will be an assessment to analyze the capacitive behavior of electrode in different electrolytes such as in acidic of 0.1 M H2SO4 has specific capacitance Csp = 525 F/g at 10 mVs−1 and much low value in basic of 1 M KOH electrolyte. This paper reflects the novel synthesis and applications of MXene/Ag2CrO4 nanocomposite electrode fabrication in energy storage devices such as supercapacitors.

Magnesium doped copper chromites spinel nanoparticles (Cu1−xMgxCr2O4) where x = 0.2, 0.4, 0.6, and 0.8 is synthesized by sol-gel method and characterized by different techniques like EDS, SEM, Raman spectroscopy, and Photoluminense. Various parameters affecting the sample techniques like temperature and Concentrations. The crystal phase of CuCr2O4 is tetragonal having a space group is 121/amd. We calcined at 750 °C temperature. Its lattice parameters are 6.0341 and 7.7888, which is very close to the reported ones. XRD tells us about the crystal size and dislocation density of samples. Four peaks observed in UV spectra of CuCr2O4 that occurs at different regions, bandgap obtained for the parent sample is 5.02 eV, and when we doped Magnesium then the bandgap changes and becomes 4.17 eV. Similarly, SEM results show that pure copper chromite structure is tetragonal and after doping the other compounds the structure changes according to characteristics of Nanoparticles. In PL spectra four peaks are obtained one at 347 nm, 380 nm, 500 nm and the other is at 600 nm. According to Raman, shift property two peaks are obtained with different wavelengths like 1306 cm−1 and 1465 cm−1. ED’s results clearly show that copper chromites Nanoparticles successfully synthesized and when we doped Magnesium in copper chromite, the best results are observed.