SnOx-ZnGa2O4 Photocatalysts with Enhanced Visible Light Activity

被引：47

作者：

Boppana, Venkata Bharat Ram ^{[1
]}

Lobo, Raul F. ^{[1
]}

机构：

[1] Univ Delaware, Dept Chem Engn, Ctr Catalyt Sci & Technol, Newark, DE 19716 USA

来源：

ACS CATALYSIS | 2011年 / 1卷 / 08期

关键词：

photocatalyst; photocatalysis; Sn; 5s; visible light; SnOx; ZnGa2O4; SNO2; NANOPARTICLES; ROOM-TEMPERATURE; TIO2; NITROGEN; ANATASE; WATER; DEGRADATION; ZNGA2O4; NB; DECOMPOSITION;

D O I：

10.1021/cs200137h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Surface modification of zinc gallate with SnOx species produces photocatalysts active for cresol oxidation using visible light. In these composite materials, the production rate of hydroxyl radicals and the cresol degradation rate just in visible light are higher than those with zinc gallate in UV light. The visible light absorbance in the newly introduced SnOx surface phase is attributed to the presence of Sn2+ as confirmed using Mossbauer spectroscopy. Because cresol degradation proceeds via direct oxidation by holes, the increased degradation rates in UV and visible light suggest an increase in the effective photo-oxidative reactivity of holes produced in the photocatalyst system.

引用

页码：923 / 928

页数：6

共 44 条

[1]

Preparation of nanosize anatase and rutile TiO2 by hydrothermal treatment of microemulsions and their activity for photocatalytic wet oxidation of phenol [J].

Andersson, M ;

Österlund, L ;

Ljungström, S ;

Palmqvist, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (41) :10674-10679

[2]

Photocatalytic degradation of organic molecules on mesoporous visible-light-active Sn(II)-doped titania [J].

Boppana, Venkata Bharat Ram ;

Lobo, Raul F. .

JOURNAL OF CATALYSIS, 2011, 281 (01) :156-168

[3]

Analysis of Ga coordination environment in novel spinel zinc gallium oxy-nitride photocatalysts [J].

Boppana, Venkata Bharat Ram ;

Doren, Douglas J. ;

Lobo, Raul F. .

JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (43) :9787-9797

[4]

A Spinel Oxynitride with Visible-Light Photocatalytic Activity [J].

Boppana, Venkata Bharat Ram ;

Doren, Douglas J. ;

Lobo, Raul F. .

CHEMSUSCHEM, 2010, 3 (07) :814-817

[5]

Ternary Wide Band Gap p-Block Metal Semiconductor ZnGa2O4 for Photocatalytic Benzene Degradation [J].

Chen, Xun ;

Xue, Hun ;

Li, Zhaohui ;

Wu, Ling ;

Wang, Xuxu ;

Fu, Xianzhi .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (51) :20393-20397

[6]

CONDUCTION IN NON-CRYSTALLINE SYSTEMS .5. CONDUCTIVITY, OPTICAL ABSORPTION AND PHOTOCONDUCTIVITY IN AMORPHOUS SEMICONDUCTORS [J].

DAVIS, EA ;

MOTT, NF .

PHILOSOPHICAL MAGAZINE, 1970, 22 (179) :903-&

[7]

The complete Raman spectrum of nanometric SnO2 particles [J].

Diéguez, A ;

Romano-Rodríguez, A ;

Vilà, A ;

Morante, JR .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (03) :1550-1557

[8]

Preparation of SnO2 nanoparticles and nanorods by using a hydrothermal method at low temperature [J].

Firooz, Azam Anaraki ;

Mahjoub, Ali Reza ;

Khodadadi, Abbas Ali .

MATERIALS LETTERS, 2008, 62 (12-13) :1789-1792

[9]

Tin(II) Doped Anatase (TiO2) Nanoparticles: A Potential Route to "Greener" Yellow Pigments [J].

Ghosh, Moumita ;

Pralong, V. ;

Wattiaux, A. ;

Sleight, A. W. ;

Subramanian, M. A. .

CHEMISTRY-AN ASIAN JOURNAL, 2009, 4 (06) :881-885

[10]

Photoelectrochemical cells [J].

Grätzel, M .

NATURE, 2001, 414 (6861) :338-344

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