掺杂改性纳米TiO_2降解挥发性污染物及产物研究

The Degradation Efficiency and Degradation Products of Volatile Organic Compounds Using Doped-TiO_2 Photocatalyst

本文系统研究了水热法制备的铁掺杂纳米Ti O2和氮掺杂纳米Ti O2在可见光照射下对挥发性有机物(volatile organic compounds,VOCs)的降解能力和降解产物.铁掺杂纳米Ti O2和氮掺杂Ti O2对光的吸收边分别红移到540 nm和580 nm;在可见光下具有良好的催化活性,24 h内对挥发性有机物的降解率达20%—50%,降解后的最终产物可能主要为CO2.

The degradation performance of volatile organic compounds （VOGs） under visible light irradiation by Fe-doped and nitrogen-doped nanocrystalline TiO2 powders prepared by hydrothermal method has been investigated systematically in this article. The absorption spectral edge of Fe-doped and N-doped nano-TiO2 powders have been red-shifted to nearly 540 nm and 580 nm, respectively. Experimental results show that the degradation ratio of VOCs was over 20 % to 50 % within 24 hours. CO2 was one of the final degradation products.