The Preparation Of New Visible Light Catalyst And The Study Of It’s Photoelectric Properties

Photocatalytic technology can decompose organic pollutants and other inorganic of small molecules for CO2, H2O in lighting conditions thoroughly, with high efficiency and energy saving, clean and non-toxic, simplified process, no secondary pollution, which attracted more and more the attention of people. In the photocatalytic degradation study, we want a new n-type semiconductor BiVO4and p-type semiconductor CuBi2O4photocatalyst, and study the energy band structure and light (electric) chemical behavior of them. We use n-BiVO4semiconductor for anode and p-CuBi2O4semiconductor for electrode, which format a p, n type drive fuel cell. Research how the organic matter type, organic matter concentration, electrolyte concentration, different electrode can cause the difference of battery performance.The results are as follows:1) the optimum preparation conditions of the electrodeposition method sedimentary p type semiconductor CuBi2O4film:deposit voltage-0.5V, deposition time6min, heavy effusion concentration8mmol·L-1Bi (NO3)3and4mmol·L-1Cu (NO3)2mixture, calcining temperature500℃. In the above system under the condition of the CuBi2O4film photoelectric performance is the best; The preparation of CuBi2O4membrane in alkaline and neutral solution shows good photoelectric chemical properties, but it is not suitable for use in acid solution, the photoelectric catalytic conditions can improve a lot after applying a0.2V or so negative bias, the current biggest pollutant treatment effect will increase theoretically.2) phenol as organic substrate has a strong electron-withdrawing ability,which make p-n type drive fuel cell possessed more excellent charge separation and transmission performance and lower charge compound probability, and highest photoelectric performance. For the different concentrations of phenol+Na2SO4solution, p-n type drive fuel cell’s i-v curve are showed similar trend:when applied bias is low, the optical current increases with the rise of voltage. We choose0.1mol·L-1phenol+0.1mol·L-1Na2SO4solution for p-n type drive fuel cell photoelectric properties when best organic substrate and electrolyte concentration:The fill factor of the battery is0.158, and the IPCE of the battery is7.69%under400nm light.