Preparation Of Bi-based And Zinc-based Composite Films And Research On Their Photoelectric Catalytic Performance

In the photoelectrochemical reaction,photoelectrochemical water splitting and photoelectrochemical degradation reaction cause wide attention because they can produce H₂ energy and degrade pollutants,improve the current energy shortage and environmental pollution.In the photocatalytic system,people have been working to improve the performance of photoanode materials.Zinc-based and bismuth-based thin film materials have good physical and chemical properties and diverse morphological structures.However,being used as a photoanode material still cannot meet the photoanode materials demand.By improving the structure and properties of zinc-based and bismuth-based thin film materials,such as constructing heterostructures and doping,the photocatalytic performance of photoanode materials can be improved.In response to the problems mentioned above,this paper carries out the following experimental content:?1?Design and synthesis of Zn O/Zn Fe₂O₄/Pb S photoanode materials.Zn O nanorod array film on conductive glass?FTO?was firstly prepared by solvothermal method and calcination method,and further adsorption and calcination of samples to synthesize Zn O/Zn Fe₂O₄ core/shell nanorod/nanosheet array film.Finally,by ion adsorption and reaction method,Pb S quantum dots are loaded on the Zn O/Zn Fe₂O₄array to synthesize Zn O/Zn Fe₂O₄/Pb S thin film photoanode.A series of characterizations were done to characterize Zn O/Zn Fe₂O₄/Pb S thin film photoanode samples.Meanwhile,the photoelectrochemical water splitting performance of Zn O/Zn Fe₂O₄/Pb S photoanode materials was also studied The mechanism of photoelectrochemical water splitting of Zn O/Zn Fe₂O₄/Pb S photoanode materials was also analyzed.?2?Construction of Bi₂WO₆/Bi₂S₃ thin film photoanode.Using bismuth nitrate and sodium tungstate as raw materials,Bi₂WO₆ nanosheet films were synthesized on FTO by solvothermal method,and the prepared samples and thiourea were subjected to sulfuration reaction at different times to synthesize Bi₂WO₆/Bi₂S₃ thin film photoanode.The synthesized Bi₂WO₆/Bi₂S₃ thin film photoanode samples were chemically characterized,and effects of different reaction time on the final Bi₂WO₆/Bi₂S₃ sample morphology and light absorption properties were analyzed.The performance differences of Bi₂WO₆/Bi₂S₃ thin film photoanode samples under photocatalysis,electrocatalysis and photoelectrocatalysis were studied,and the degradation mechanism of Bi₂WO₆/Bi₂S₃ thin film photoanode samples was also studied.