Solvent-free selective photocatalytic oxidation of benzyl alcohol over modified TiO2

被引：136

作者：

Feng, Wei ^{[1
]}

Wu, Guangjun ^{[1
]}

Li, Landong ^{[1
]}

Guan, Naijia ^{[1
]}

机构：

[1] Nankai Univ, Coll Chem, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China

来源：

GREEN CHEMISTRY | 2011年 / 13卷 / 11期

关键词：

VISIBLE-LIGHT IRRADIATION; MOLECULAR-OXYGEN; HETEROGENEOUS PHOTOCATALYSIS; CORRESPONDING ALDEHYDES; AEROBIC OXIDATION; CATALYST; WATER; PHOTOOXIDATION; EFFICIENT; CLUSTERS;

D O I：

10.1039/c1gc15595d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Heterogeneous photocatalysis offers a promising route to realize green oxidation processes in organic synthesis. In this research, the solvent-free selective photocatalytic oxidation of benzyl alcohol to benzaldehyde in the presence molecular oxygen was studied by using TiO2 and modified TiO2 as photocatalysts. The surface modification of TiO2 by transition metal clusters dramatically enhanced the photocatalytic oxidation activity. Ir/TiO2 prepared by photodeposition showed a remarkably high activity for the photocatalytic oxidation of benzyl alcohol, and an average reaction rate of 14538 mu mol h(-1) g(cat)(-1) could be obtained. The effect of preparation method, iridium loading and reaction conditions on the catalytic performance of Ir/TiO2 is investigated in detail. Based on the catalytic and characterization results, the problem of product selectivity and the reaction mechanism of the photocatalytic oxidation of benzyl alcohol over Ir/TiO2 are discussed.

引用

页码：3265 / 3272

页数：8

共 39 条

[1] A collaborative effect between gold and a support induces the selective oxidation of alcohols [J].

Abad, A ;

Concepción, P ;

Corma, A ;

García, H .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (26) :4066-4069

[2] Photocatalytic oxidation of cyclohexane by titanium dioxide: Catalyst deactivation and regeneration [J].

Carneiro, Joana T. ;

Moulijn, Jacob A. ;

Mul, Guido .

JOURNAL OF CATALYSIS, 2010, 273 (02) :199-210

[3] A green process for chlorine-free benzaldehyde from the solvent-free oxidation of benzyl alcohol with molecular oxygen over a supported nano-size gold catalyst [J].

Choudhary, VR ;

Dhar, A ;

Jana, P ;

Jha, R ;

Uphade, BS .

GREEN CHEMISTRY, 2005, 7 (11) :768-770

[4] Photocatalytic oxidation of chlorinated hydrocarbons in water [J].

Crittenden, JC ;

Liu, JB ;

Hand, DW ;

Perram, DL .

WATER RESEARCH, 1997, 31 (03) :429-438

[5] Selective oxidation using gold [J].

Della Pina, Cristina ;

Falletta, Ermelinda ;

Prati, Laura ;

Rossi, Michele .

CHEMICAL SOCIETY REVIEWS, 2008, 37 (09) :2077-2095

[6] HETEROGENEOUS PHOTOCATALYSIS [J].

FOX, MA ;

DULAY, MT .

CHEMICAL REVIEWS, 1993, 93 (01) :341-357

[7] Catalytic processes activated by light [J].

Galian, R. E. ;

Perez-Prieto, J. .

ENERGY & ENVIRONMENTAL SCIENCE, 2010, 3 (10) :1488-1498

[8] Work functions of elements expressed in terms of the Fermi energy and the density of free electrons [J].

Halas, S ;

Durakiewicz, T .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (48) :10815-10826

[9] Development of alternative photocatalysts to TiO2: Challenges and opportunities [J].

Hernandez-Alonso, Maria D. ;

Fresno, Fernando ;

Suarez, Silvia ;

Coronado, Juan M. .

ENERGY & ENVIRONMENTAL SCIENCE, 2009, 2 (12) :1231-1257

[10] Heterogeneous photocatalysis: fundamentals and applications to the removal of various types of aqueous pollutants [J].

Herrmann, JM .

CATALYSIS TODAY, 1999, 53 (01) :115-129

← 1 2 3 4 →