Efficient Decomposition of Benzene over a -Ga2O3 Photocatalyst under Ambient Conditions
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- 作者：Yidong Hou ; Xinchen Wang ; Ling Wu ; Zhengxin Ding ; Xianzhi Fu
- 刊名：Environmental Science & Technology
- 出版年：2006
- 出版时间：September 15, 2006
- 年：2006
- 卷：40
- 期：18
- 页码：5799 - 5803
- 全文大小：370K
- 年卷期：v.40,no.18(September 15, 2006)
- ISSN：1520-5851
文摘
A porous 
-Ga2O3 photocatalyst has been successfullyprepared. The photocatalyst was characterized by XRD, N2adsorption-desorption, TEM, UV/vis, and FTIR techniques.The photocatalytic activity of the sample was evaluatedby the decomposition of benzene in air under UV lightillumination and was compared with that of the commercialtitania (Degussa P25) and Pt/P25. Results revealed thatthe synthesized Ga2O3 was porous -Ga2O3 and was highlyphotoactive for mineralizing benzene and its derivatives(e.g., toluene and ethylbenzene) to CO2 under ambientconditions. The photocatalytic conversion of benzene over-Ga2O3 was about 1 order of magnitude higher thanthat over P25, and no obvious deactivation of -Ga2O3 wasobserved during the prolonged operation of 80 h. Thehigh activity and long-term stability of the Ga2O3 have beenascribed to its stronger oxidative capability and higherspecific surface area in comparison with P25.
-Ga2O3 photocatalyst has been successfullyprepared. The photocatalyst was characterized by XRD, N2adsorption-desorption, TEM, UV/vis, and FTIR techniques.The photocatalytic activity of the sample was evaluatedby the decomposition of benzene in air under UV lightillumination and was compared with that of the commercialtitania (Degussa P25) and Pt/P25. Results revealed thatthe synthesized Ga2O3 was porous -Ga2O3 and was highlyphotoactive for mineralizing benzene and its derivatives(e.g., toluene and ethylbenzene) to CO2 under ambientconditions. The photocatalytic conversion of benzene over-Ga2O3 was about 1 order of magnitude higher thanthat over P25, and no obvious deactivation of -Ga2O3 wasobserved during the prolonged operation of 80 h. Thehigh activity and long-term stability of the Ga2O3 have beenascribed to its stronger oxidative capability and higherspecific surface area in comparison with P25.