采用溶胶-凝胶法制备铋掺杂型二氧化钛可见光催化剂,并应用到水性涂料中形成光触媒涂料.对其降解甲醛的行为进行研究,以"甲醛浓度→二氧化碳浓度"的变化作为分析甲醛降解的一种新的研究依据,考察了光触媒涂料在不同条件下降解甲醛的催化能力.结果表明:在氙灯全谱光照射下,光触媒涂料能有效的降解甲醛,但是其自身有一部分也被氧化.%A bismuth-doped titanium dioxide visible light catalyst was prepared by sol-gel method, and applied to water-borne coatings,forming a photocatalyst coating. The catalytic ability of degradation of formaldehyde under different conditions of this photocatalyst in waterborne coatings was studied by a new means which was the change of the concentration of formaldehyde and carbon dioxide. The results showed that the photocatalyst coating can be effective in the degradation of formaldehyde,but it was also oxidized.
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