%0 Journal Article
%T Involvement of chloride anion in photocatalytic process
%A YANG Shi-ying
%A CHEN Ying-xu
%A LOU Li-ping
%A WU Xiao-na
%A
YANG Shi-ying
%A CHEN Ying-xu
%A LOU Li-ping
%A WU Xiao-na
%J 环境科学学报(英文版)
%D 2005
%I
%X The effect of Cl- on photocatalytic degradation (PCD) of pollutants is an important factor since it is ubiquitous in nature. In general, Cl- showed an inhibition on photodegradation due to its scavenging HO* radicals. In this paper, experiments were carried out to examine the effects of Cl- on the PCD of Methylene Blue (MB) and Orange II (OII) in aqueous TiO2 suspensions under UV light illumination. It was found that low concentration of Cl- (< 0.01 mol/L) showed little influence on both dyes, however, high concentration of Cl (> 0.10 mol/L) had a very different influence on the decolorization of dyes: a significant inhibition for MB but a great promotion for OII. In the presence of 0.50 mol/L Cl-, the rate decreased by 70% for MB while increased 7.5-fold for OII. Furthermore, two bands in the ultraviolet region of OII were rapidly broken down. The proposed mechanism was discussed in detail.
%K photocatalytic degradation
%K TiO2
%K dye pollutants
%K chloride ion
%K mechanism
接触反应
%K PCD
%K 污染物质
%K Cl^-
%K 光分解作用
%K UV光
%K 氯化物
%K 电化学
%K 阴离子
%K 有机废水
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=3BA6C1BAFB80F9A89426B1CDAFC05683&yid=2DD7160C83D0ACED&vid=BCA2697F357F2001&iid=94C357A881DFC066&sid=A67EE05E56DA7F45&eid=849F08713EB6820A&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=3&reference_num=30