负载TiO₂活性炭的低温制备及其微波光催化活性研究

Low-temperature preparation and microwave photocatalytic activity study of TiO2-mounted activated carbon.

作者信息

Liu Yazi, Yang Shaogui, Hong Jun, Sun Cheng

机构信息

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.

出版信息

J Hazard Mater. 2007 Apr 2;142(1-2):208-15. doi: 10.1016/j.jhazmat.2006.08.020. Epub 2006 Aug 17.

DOI:10.1016/j.jhazmat.2006.08.020

PMID:16982137

Abstract

TiO2 thin films were deposited on granular activated carbon by a dip-coating method at low temperature (373 K), using microwave radiation to enhance the crystallization of titania nanoparticles. Uniform and continuous anatase titania films were deposited on the surface of activated carbon. BET surface area of TiO2-mounted activated carbon (TiO2/AC) decreased a little in comparison with activated carbon. TiO2/AC possessed strong optical absorption capacity with a band gap absorption edge around 360 nm. The photocatalytic activity did not increase when the as-synthesized TiO2/AC was thermally treated, but was much higher than commercial P-25 in degradation of phenol by irradiation of electrodeless discharge lamps (EDLs).

摘要

采用浸渍法在低温（373 K）下将TiO₂薄膜沉积在颗粒活性炭上，利用微波辐射增强二氧化钛纳米颗粒的结晶。在活性炭表面沉积了均匀且连续的锐钛矿型二氧化钛薄膜。与活性炭相比，负载TiO₂的活性炭（TiO₂/AC）的BET表面积略有减小。TiO₂/AC具有很强的光吸收能力，带隙吸收边缘约为360 nm。合成后的TiO₂/AC经过热处理后光催化活性并未提高，但在无电极放电灯（EDL）照射下对苯酚的降解活性远高于商用P-25。