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以TiCl4为原料,采用可控水解法制备了TiO2光催化剂。以活性嫩黄为模拟污染源,紫外灯为光源,考察了溶液pH值、催化剂用量、反应时间和催化剂循环次数等对纳米二氧化钛光催化降解活性嫩黄的影响。实验结果表明,pH 5.5,催化剂投加量为2.0g/L,光催化反应时间为60min时,色度及化学需氧量(COD)去除率均较高。TiO2光催化剂重复使用在5次以内,其催化活性基本不变。
TiCl4 as raw material, prepared by controlled hydrolysis TiO2 photocatalyst. The reactive bright yellow as a simulation source of pollution, UV light as a light source, investigated the pH value of the solution, the amount of catalyst, the reaction time and the number of catalyst cycles nano-titanium dioxide photocatalytic degradation of reactive yellow. The experimental results show that the removal rate of chroma and chemical oxygen demand (COD) is higher when the pH value is 5.5, the dosage of catalyst is 2.0g / L and the photocatalytic reaction time is 60min. TiO2 photocatalyst reused within 5 times, its catalytic activity remained unchanged.