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

页码：219 / 228

页数：10

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