Correlation study between photo-degradation and surface adsorption properties of phenol and methyl orange on TiO2 Vs platinum-supported TiO2

被引：53
作者：
Murcia, J. J. [1 ]
Hidalgo, M. C. [1 ]
Navio, J. A. [1 ]
Arana, J. [2 ]
Dona-Rodriguez, J. M. [2 ]
机构：
[1] Univ Seville, CSIC, ICMS, Seville 41092, Spain
[2] Univ Las Palmas Gran Canaria, CIDIA Dept Quim, Las Palmas Gran Canaria 35017, Spain
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2014年 / 150卷
关键词：
Pt-TiO2; FT-IR; Phenol; Methyl orange; Substrate adsorption; IMPROVED PHOTOCATALYTIC ACTIVITY; OXIDATION; ETHANOL; TITANIA; MINERALIZATION; CATALYSTS; ACETONE; SIZE; GAP; IR;
D O I：
10.1016/j.apcatb.2013.12.010
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：
Adsorption of phenol and methyl orange on the surface of TiO2 and Pt-TiO2 photocatalysts was investigated by FT-IR spectroscopy. It was found that platinum plays an important role in the adsorption properties of the studied substrates on TiO2. Platinum deposits modified the phenol-photocatalyst interaction providing new adsorption sites on TiO2 surface. On Pt-TiO2 photocatalysts, phenol mainly interacts via formation of adsorbed phenolates species. It was also found that the adsorption of methyl orange on titania and Pt-TiO2 photocatalysts occurs via interaction of the azo group with surface Ti4+. Pt photodeposition significantly increases the TiO2 photoreactivity in phenol and methyl orange photo-degradation; however, this increase depends on the properties of the Pt deposits. Moreover, it was observed that platinum content is the main factor determining the substrate-photocatalyst interaction and therefore the Pt-TiO2 photocatalytic performance. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：107 / 115
页数：9
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