首先制备了银和铁掺杂改性的二氧化钛,然后用浸渍-烘焙-煅烧的方法制备了负载银和铁的二氧化钛复合织物;其次用SEM、紫外-可见漫反射光谱研究了该复合光催化材料的性能;最后,以可见光高压汞灯为光源,以甲醛为目标降解物,研究了其光催化性能.结果表明,银、铁元素的加入使催化材料的紫外-可见漫反射光谱发生了明显变化,金属元素掺杂量越大,复合催化材料对可见光的吸收能力越强.另外,银和铁的加入均能使催化材料在可见光下对甲醛的净化能力增强,银元素最佳掺杂量是1.5%,铁元素最佳掺杂量是1%.
Firstly, the silver and iron doping modification titanium dioxide was prepared and the titanium dioxide composite fabric loaded silver and iron was prepared by method of dipping-baking-calcining.Secondly, the properties of the composite photocatalytic material were studied using SEM and UV-Vis DRS.Finally, with the visible light high pressure mercury lamp as light source, the formaldehyde as degradation target, the photocatalytic performance was studied.The results showed that the silver and iron element made the UV-Vis DRS of catalytic materials change significantly.The greater the amount of metal element doped, the stronger absorption ability the composite catalytic material to visible light would be.In addition, the addition of silver and iron element could enhance the purification ability to formaldehyde of the catalytic material in the visible light.The best doping amount of silver was 1.5% and the best doping amount of iron was 1%.
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