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以金属/Ti O2复合膜为光催化剂,活性艳蓝为模拟染料废水,研究了光照时间、溶液初始浓度、p H、H2O2用量和无机盐对染料光降解率的影响。结果表明,金属/Ti O2复合膜具有较好的光催化活性和超亲水性。活性艳蓝的光降解率随染料初始浓度和p H的升高而降低,在实验条件下5 h内的光降解率可达到85%以上,且能重复利用。催化剂H2O2的加入促进光降解的进行,且存在一个最佳值,最佳H2O2浓度为0.02 mol/L,低于或超过该值均会导致染料光降解率的下降。而无机盐的加入则抑制了光降解反应的进行,且Na2SO4的抑制作用明显强于Na Cl和Na NO3。
The effects of light time, initial solution concentration, p H, H2O2 dosage and inorganic salt on the rate of photodegradation of dye were studied with metal / Ti O2 composite membrane as photocatalyst and reactive brilliant blue as simulated dye wastewater. The results show that the metal / Ti O2 composite film has good photocatalytic activity and superhydrophilicity. The photodegradation rate of reactive brilliant blue decreases with the initial concentration of dye and p H, and the photodegradation rate can reach more than 85% in 5 h under experimental conditions and can be reused. The addition of H2O2 promoted the photodegradation, and there was an optimum value. The optimum concentration of H2O2 was 0.02 mol / L. The values below or above this value led to the decrease of photodegradation rate. The addition of inorganic salts inhibited the photodegradation reaction, and the inhibitory effect of Na2SO4 was significantly stronger than NaCl and NaNO3.