Preparation And Optical Properties Of Novel Single/Double Layer Catalyst Modified BiVO₄ Photoanode

Solar photocatalytic water splitting to achieve artificial photosynthesis, make convenient for people converted solar energy into chemical energy. It has an important strategic significance for sustainable development in today’s society. Since water splitting in the process of oxidation half reaction that requires a higher activation energy, hydrogen production from solar energy has become a major problem. Therefore, the development of efficient and inexpensive water oxidation catalyst and the effective surface of the photoanode is the key to solar energy conversion and storage.In this thesis, we prepared the catalyst and molecular compound semiconductor materials FTO/WO3/Co and FTO/BiVO4/Co photoanode, the composite electrode photoelectric activity tests respectively. The results showed that FTO/WO3/Co electrodes the photocatalytic oxidation of water activity was not significantly increased; the FTO/BiVO4/Co photoanode current catalytic is increased by 1 times faster than light only BiVO4 anodic photocurrent compared in water oxidation reaction.PS II photoanode basic system processes, the use of inorganic catalysts Ni(OH)x and Fe catalyst modified BiVO4 electrode as the hole storage in combination with molecular construct bilayer catalyst system, layer, efficient transfer and collection of photogenerated holes BiVO4 semiconductor, and further improve the photocatalytic water oxidation catalyst composite electrode capacity by coupling molecules. FTO/BiVO4/Fe photoanode and FTO/BiVO4/Ni(OH)x photoanode slightly improved. The FTO/BiVO4/Ni(OH)x/Co photoanode and FTO/BiVO4/Ni(OH)xphotoanode 0.5 times compared to enhance the photocurrent.This article is designed single molecular photoanode and a new system of double molecular photoanode modified semiconductor optical anode, constructed efficient light water splitting system has important research value.