纳米二氧化钛光催化降解室内甲醛气体的研究进展

Research Progress of Nano-TiO_2 Photocatalysis Degradation of Indoor Formaldehyde

室内甲醛气体浓度低,降解难度大。介绍了纳米二氧化钛(TiO_2)光催化氧化降解室内甲醛气体的原理,详细探讨了提高光催化降解甲醛效果的方法,包括:TiO_2催化剂改性;选用吸附性强的催化剂载体;提高光利用率;超声辅助催化和等离子体耦合。并对TiO_2在可见光下催化降解室内甲醛的研究方向进行了进一步的展望。

For its low concentration indoor, formaldehyde is hard to degradation. The mechanism of nano- TiO2 photocatalysis degrading indoor formaldehyde gas is explored. To improve photo catalytic degradation rate of formaldehyde, the modification of TiO2 catalyst, the adoption of strong absorptive catalyst support, the improvement of avability ratio of light, the ultrasonic assisted catalytic and the combination with pulsed discharge plasma were discussed in detail as the proposed methods. The future tendency of degradation indoor formaldehyde by TiO2 in visible light was predicted.