Selective oxidation of alcohols in aqueous suspensions of rhodium ion-modified TiO2 photocatalysts under irradiation of visible light

被引：38
作者：
Kitano, Sho [1 ]
Tanaka, Atsuhiro [1 ]
Hashimoto, Keiji [2 ]
Kominami, Hiroshi [2 ]
机构：
[1] Kinki Univ, Interdisciplinary Grad Sch Sci & Engn, Higashiosaka, Osaka 5778502, Japan
[2] Kinki Univ, Fac Sci & Engn, Dept Appl Chem, Higashiosaka, Osaka 5778502, Japan
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 24期
基金：
日本学术振兴会;
关键词：
TITANIUM(IV) OXIDE; CORRESPONDING ALDEHYDES; MOLECULAR-OXYGEN; BENZYL ALCOHOL; DIOXIDE; CATALYST; WATER; DEGRADATION; DERIVATIVES; 2-PROPANOL;
D O I：
10.1039/c4cp00863d
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：
Photocatalytic oxidation of benzyl alcohols in aqueous suspensions of rhodium ion-modified titanium(IV) oxide (Rh3+/TiO2) in the presence of O-2 under irradiation of visible light was examined. In the photocatalytic oxidation of benzyl alcohol, benzaldehyde was obtained in a high yield (97%) with >99% conversion of benzyl alcohol. Rh3+/TiO2 photocatalysts having various physical properties were prepared using commercially available TiO2 powders as supporting materials for Rh3+ to investigate the effect(s) of physical properties of TiO2 on photocatalytic activities of Rh3+/TiO2 for selective oxidation. Adsorption properties of benzyl alcohol, benzaldehyde and benzoic acid on TiO2 were also investigated to understand the high benzaldehyde selectivity over the Rh3+/ TiO2 photocatalyst. The reaction mechanism was discussed on the basis of the results of photocatalytic oxidation of various p-substituted benzyl alcohol derivatives.
引用
收藏
页码：12554 / 12559
页数：6
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