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为提高光催化降解印染废水的效率,以空心结构微珠(浮珠)为载体,将TiO2溶胶-凝胶负载于表面,制备一系列不同焙烧温度、不同负载次数、具有高催化性能的负载型光催化剂.通过对甲基橙溶液光催化降解实验,研究了焙烧温度、负载次数、甲基橙溶液的初始质量浓度对光催化性能的影响.实验结果表明:500℃焙烧、负载4次时制得的负载型光催化剂催化活性最高,光照反应120 min5、mg/L的甲基橙溶液降解率为69%;降低甲基橙溶液初始质量浓度,其降解速率明显提高.
In order to improve the efficiency of photocatalytic degradation of printing and dyeing wastewater, TiO2 sol-gel was loaded on the surface of hollow structure microspheres (beads) as carrier, a series of supported type catalysts with different calcination temperature, different loading times and high catalytic performance Photocatalyst.The photocatalytic degradation of methyl orange solution was studied.The effects of calcination temperature, loading times and initial concentration of methyl orange solution on photocatalytic performance were studied.The experimental results show that calcination at 500 ℃ for 4 times The photocatalytic activity of the supported photocatalyst was the highest. The photodegradation rate of methyl orange solution was 69% at 120 min5 and mg / L, and the degradation rate of methyl orange solution decreased obviously when the initial concentration of methyl orange solution was lowered.