Photocatalytic transformation of rhodamine B and its effect on hydrogen evolution over Pt/TiO2 in the presence of electron donors

被引：99
|
作者：
Li, YX
Lu, GX [1 ]
Li, SB
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synthesis & Select Oxidat, Lanzhou 730000, Peoples R China
[2] Nanchang Univ, Dept Chem, Nanchang 330047, Peoples R China
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2002年 / 152卷 / 1-3期
关键词：
photocatalytic hydrogen evolution; rhodamine B; hydrogenation; ethanol radical addition; Pt/TiO2;
D O I：
10.1016/S1010-6030(02)00210-1
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the presence of electron donors, oxalic acid, ethanol and disodium ethytene-diamine tetraacetate (EDTA), the photocatalytic transformation of rhodamine B (Rh B) and its effect on photocatalytic hydrogen evolution over PL/TiO2 have been examined. UV-Vis and fast atom bombardment mass spectrometry (FABMS) evidences demonstrate that two reductive reaction paths (photocatalytic hydrogenation and additive combination of Rh B with ethanol radical) take place over Pt/TiO2 in the reaction system. The adsorption behavior of Rh B oil Pt/TiO2 with coexisting electron donors is a key factor for the transformation. As a result of the hydrogenation and the addition of ethanol radical, the rates of photocatalytic hydrogen generation by the donors decrease notably. A possible reaction mechanism is discussed. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：219 / 228
页数：10
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