| Semiconductor material has been widely used in many fields such as energy saving,artificial intelligence and solving environmental and energy problems because of its excellent photoelectric performance,such as sewage treatment,hydrogen production,and solar cells.How to improve the photoelectrocatalytic performance of the semiconductor materials in a stable and effective manner has become a research focus.In order to prepare semiconductor film which has better photoelectric performance,we considered to study on the WO3 nanosheet films,WO3/Bi2MoO6composite films,WO3/BiVO4 composite films and WO3/Bi2WO6 composite films.The main research includes:Using conductive glass as the substrate,WO3 nano-film is prepared by hydrothermal method.Then WO3/Bi2MoO6 composite film was prepared by solvothermal method with WO3 nano-film as substrate,and different WO3/Bi2MoO6composite film samples were obtained by changing different solvothermal reaction time(7 h,9 h,11 h).The synthesis and characterization of the WO3/Bi2MoO6composite films were performed by X-ray diffraction and scanning electron microscope.The spectral response range,photocurrent density and photoelectric degradation efficiency of WO3/Bi2MoO6 composite film samples were obtained by absorption spectrum test,photocurrent test and photoelectric catalytic test.The analysis results show that the WO3/Bi2MoO6 composite film sample has a wider spectral response range,higher photocurrent density and significantly improved photoelectric catalytic efficiency than WO3 nano-film.The WO3/Bi2MoO6 composite film samples with solvothermal reaction for 9 h have the highest photocurrent density and the best photoelectric catalytic efficiency than the samples which solvothermal reaction time is 7 h and 11 h.Using conductive glass as the substrate,WO3 nano-film is prepared by hydrothermal method.Then WO3/BiVO4 composite film was prepared by spin coating with WO3 nano-film as substrate,and different WO3/BiVO4 composite film samples were obtained by changing different spin coating solvent dosage(0.4 ml,0.6 ml,0.8ml).The synthesis and characterization of the WO3/BiVO4 composite films were performed by X-ray diffraction and scanning electron microscope.The spectral response range,photocurrent density and photoelectric degradation efficiency of WO3/BiVO4 composite film samples were obtained by absorption spectrum test,photocurrent test and photoelectric catalytic test.The analysis results show that the WO3/BiVO4 composite film sample has a wider spectral response range,higher photocurrent density and significantly improved photoelectric catalytic efficiency than WO3 nano-film.The WO3/BiVO4 composite film samples with spin coating solvent dosage for 0.6 ml have the highest photocurrent density and the best photoelectric catalytic efficiency than the samples which spin coating solvent dosage is 0.4 ml and0.8 ml.Using conductive glass as the substrate,WO3 nano-film is prepared by hydrothermal method.Then WO3/Bi2WO6 composite film was prepared by solvothermal method with WO3 nano-film as substrate,and different WO3/Bi2WO6composite film samples were obtained by changing different solvothermal reaction time(6 h,8 h,10 h).The synthesis and characterization of the WO3/Bi2WO6composite films were performed by X-ray diffraction and scanning electron microscope.The spectral response range,photocurrent density and photoelectric degradation efficiency of WO3/Bi2WO6 composite film samples were obtained by absorption spectrum test,photocurrent test and photoelectric catalytic test.The analysis results show that the WO3/Bi2WO6 composite film sample has a wider spectral response range,higher photocurrent density and significantly improved photoelectric catalytic efficiency than WO3 nano-film.The WO3/Bi2WO6 composite film samples with solvothermal reaction for 8 h have the highest photocurrent density and the best photoelectric catalytic efficiency than the samples which solvothermal reaction time is 6 h and 10 h. |
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