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Mesoporous cadmium bismuth niobate(CdBi2Nb2O9)nanospheres for hydrogen generation under visible light

Journal of Energy Chemistry 2017年第3期26卷 433-439页

作者： Aniruddha K.Kulkarni Yogesh A.Sethi rajendra p.panmand Latesh K.Nikam Jin-Ook Baeg N.R.Munirathnam Anil V.Ghule Bharat B.Kale Centre for Materials for Electronics Technology(C-MET) Department of Electronics and Information and Technology(DeitY)Government of IndiaPanchawati off Pashan RoadPune 411008India Department of Nanotechnology Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad 411007India Department of chemistry Shivaji UniversityKolhapur 416004India Advanced Chemical Technology Division Korea Research Institute of Chemical TechnologyYuseong Daejeon 305600Republic of Korea Department of Chemistry Prof.John Barnabas School of Biological studiesAhmednagar College Ahmednagar 414001India

Herein, we report visible light active mesoporous cadmium bismuth niobate（CBN） nanospheres as a photocatalyst for hydrogen（H） generation from copious hydrogen sulfide（HS）. CBN has been synthesized by solid state reaction（SSR） and also using combustion method（CM） at relatively lower *** as-synthesized materials were characterized using different techniques. X-ray diffraction analysis shows the formation of single phase orthorhombic CBN. Field emission scanning electron microscopy and high resolution-transmission electron microscopy showed the particle size in the range of.5–1 μm for CBN obtained by SSR and 50–70 nm size nanospheres using CM, respectively. Interestingly, nanospheres of size 50–70 nm self assembled with 5–7 nm nanoparticles were observed in case of CBN prepared by *** optical properties were studied using UV–visible diffuse reflectance spectroscopy and showed band gap around.0 eV for SSR and 3.1 eV for CM. The slight shift in band gap of CM is due to nanocrystalline nature of material. Considering the band gap in visible region, the photocatalytic activity of CBN for hydrogen production from HS has been performed under visible light. CBN prepared by CM has shown utmost hydrogen evolution i.e. 6912 μmol/h/0.5 g which is much higher than CBN prepared using *** enhanced photocatalytic property can be attributed to the smaller particle size, crystalline nature,high surface area and mesoporous structure of CBN prepared by combustion method. The catalyst was found to be stable, active and can be utilized for water splitting.

关键词： photocatalysis CdBi2Nb2O9 Hydrogen generation

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