Recent Advances of Photocatalytic Hydrogenation of CO2 to Methanol

Constantly increasing hydrocarbon fuel combustion along with high levels of carbon dioxide emissions has given rise to a global energy crisis and environmental alterations. Photocatalysis is an effective technique for addressing this energy and environmental crisis. Clean and renewable solar energy is a very favourable path for photocatalytic CO2 reduction to value-added products to tackle problems of energy and the environment. The synthesis of various products such as CH4, CH3OH, CO, EtOH, etc., has been expanded through the photocatalytic reduction of CO2. Among these products, methanol is one of the most important and highly versatile chemicals widely used in industry and in day-to-day life. This review emphasizes the recent progress of photocatalytic CO2 hydrogenation to CH3OH. In particular, Metal organic frameworks (MOFs), mixed-metal oxide, carbon, TiO2 and plasmonic-based nanomaterials are discussed for the photocatalytic reduction of CO2 to methanol. Finally, a summary and perspectives on this emerging field are provided

Recent Advances of Photocatalytic Hydrogenation of CO₂ to Methanol

Constantly increasing hydrocarbon fuel combustion along with high levels of carbon dioxide emissions has given rise to a global energy crisis and environmental alterations. Photocatalysis is an effective technique for addressing this energy and environmental crisis. Clean and renewable solar energy is a very favourable path for photocatalytic CO2 reduction to value-added products to tackle problems of energy and the environment. The synthesis of various products such as CH4, CH3OH, CO, EtOH, etc., has been expanded through the photocatalytic reduction of CO2. Among these products, methanol is one of the most important and highly versatile chemicals widely used in industry and in day-to-day life. This review emphasizes the recent progress of photocatalytic CO2 hydrogenation to CH3OH. In particular, Metal organic frameworks (MOFs), mixed-metal oxide, carbon, TiO2 and plasmonic-based nanomaterials are discussed for the photocatalytic reduction of CO2 to methanol. Finally, a summary and perspectives on this emerging field are provided

Morphological tuning of CuO nanostructures by simple preparative parameters in SILAR method and their consequent effect on supercapacitors

Morphology-controlled synthesis of nanomaterials by tuning simple preparative parameters is an impressive path to develop diverse nanostructured materials. Here, we are exploring a successful example of fabrication of hierarchical CuO nanostructures (nanoflakes, nanopetals and diffused nanorods) by simply controlling temperature of reaction bath (3rd beaker) in SILAR method. These CuO nanostructures are further successfully employed as electrode material in supercapacitors. The correlation between electrochemical supercapacitive properties and nanostructures of CuO is investigated in detail. It is revealed that, the supercapacitive properties strongly depend on CuO nanostructures. The specific capacitance values for nanoflakes, nanopetals and diffused nanorods of CuO are found to be 664 F/g, 790 F/g and 695 F/g, respectively at 5 mV/s scan rate. Ragone plot ascertains that CuO nanostructures obtained by SILAR method are potential candidates for high power and high energy density supercapacitors. In addition, EIS analyses show lower ESR values and excellent frequency response for CuO nanostructures.One of the authors (SKS) is grateful to the University Grants Commission (UGC), New Delhi for financial support through the scheme UGC-BSR. The authors are thankful to the DST (DST-FIST, DST-PURSE) India for providing instrumental facilities at Department of Physics, Shivaji University, and Kolhapur. One of the authors (VJF) is grateful to the University Grants Commission (UGC), New Delhi for financial support through the scheme no. MRP. MAJOR-PHYS-2013-35168. Analysis of CuO samples was supported by Dongguk University, Seoul, Korea Research Fund 2014–2015.Peer Reviewe

Electrochemical synthesis: Monoclinic Cu2Se nano-dendrites with high performance for supercapacitors

et al.Morphology is a key factor in designing novel nanomaterials with controlled functional properties for the electrochemical application. Herein, we demonstrate the supercapacitor applications of the copper selenide (CuSe) electrodes with different morphologies prepared by electrodeposition at -0.65, -0.75, and -0.85 V/SCE deposition potentials. The well-defined morphologies of the CuSe nanostructures have been useful to develop potential applications in the supercapacitor devices. The nanodendrite-like morphology obtained at the deposition potential -0.75 V/SCE showed maximum specific capacitance (688 F/g at 5 mV/s) as compared to the other morphologies.Analysis of CdSe0.6Te0.4 samples was supported by Dongguk University, Seoul, Korea Research Fund 2016–2018.Peer Reviewe

Enhanced photoelectrochemical properties of nanoflower-like hexagonal CdSe0.6Te0.4: Effect of electron beam irradiation

Present investigation deals with the effect of electron beam irradiation on the photoelectrochemical properties of cadmium selenium telluride (CdSeTe) thin films. Initially, CdSeTe thin films were electrodeposited on fluorine doped tin oxide (FTO) coated glass and stainless steel substrates. Later, these CdSeTe thin films were irradiated with high energy electron beam (10 MeV) of different doses from 10 to 30 kilograys (kGy). The effect of electron beam irradiation on different physico-chemical properties of CdSeTe thin films such as morphological, structural, optical and photoelectrochemical has been investigated. It is observed that, the electron beam irradiation treatment considerably affects the properties of CdSeTe thin films. The surface morphology of CdSeTe thin films was changed from cauliflowers to nanoflowers, nanoroses and interconnected nanoflakes with doses of electron beams. Furthermore, the effect of electron beam irradiation on photoelectrochemical properties of CdSeTe films was investigated. It is interesting to note that, the photoelectrochemical (PEC) properties of CdSeTe thin films are extensively affected by electron beam irradiation. The photoconversion efficiency values of CdSeTe films for different doses of electron beam are found to be 0.9%, 1.1%, 2.0% and 1.5%, respectively.Analysis of CdSe0.6Te0.4 samples was supported by Dongguk University, Seoul, Korea Research Fund 2016–2018. One of the authors (VJF) is grateful to the University Grants Commission (UGC), New Delhi for financial support through the scheme no. MRP. MAJOR-PHYS-2013-35168.Peer Reviewe