Photocatalytic Degradation of Methyl Orange over Single Crystalline ZnO: Orientation Dependence of Photoactivity and Photostability of ZnO

被引：224

作者：

Kislov, Nikolai ^{[1
]}

Lahiri, Jayeeta ^{[2
]}

Verma, Himanshu ^{[2
]}

Goswami, D. Yogi ^{[1
]}

Stefanakos, Elias ^{[1
]}

Batzill, Matthias ^{[2
]}

机构：

[1] Univ S Florida, Clean Energy Res Ctr, Tampa, FL 33620 USA

[2] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

来源：

LANGMUIR | 2009年 / 25卷 / 05期

关键词：

PHOTOCHEMICAL REACTIVITY; STRUCTURE SENSITIVITY; SURFACE; FACES;

D O I：

10.1021/la803845f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photocatalytic destruction of methyl orange in aqueous solution has been studied over single crystal ZnO surfaces under UV irradiation. Differences in the apparent reaction rates between the polar surfaces (first order) and the nonpolar ZnO(10-10) surface (zero order) were observed. Reaction rates for different crystallographic orientations showed the highest activity for ZnO(10-10) followed by ZnO(0001)-Zn and the lowest activity for ZnO(000-1)-O surfaces. In addition, the etching of surfaces by photolysis has been studied. For this process, strongly face-dependent behavior was also observed. Possible reasons for the face dependencies are discussed.

引用

页码：3310 / 3315

页数：6

共 20 条

[1] Novel stabilization mechanism on polar surfaces: ZnO(0001)-Zn [J].

Dulub, O ;

Diebold, U ;

Kresse, G .

PHYSICAL REVIEW LETTERS, 2003, 90 (01) :4-016102

[2] Excitonic properties of the polar faces of bulk ZnO after wet etching [J].

Fryar, J ;

McGlynn, E ;

Henry, MO ;

Cafolla, AA ;

Hanson, CJ .

PHYSICA B-CONDENSED MATTER, 2003, 340 :210-215

[3] The influence of the dipolar field effect on the photochemical reactivity of Sr2Nb2O7 and BaTiO3 microcrystals [J].

Giocondi, Jennifer L. ;

Rohrer, Gregory S. .

TOPICS IN CATALYSIS, 2008, 49 (1-2) :18-23

[4] The origin of photochemical anisotropy in SrTiO3 [J].

Giocondi, Jennifer L. ;

Salvador, Paul A. ;

Rohrer, Gregory S. .

TOPICS IN CATALYSIS, 2007, 44 (04) :529-533

[5] Structure sensitivity of photochemical oxidation and reduction reactions on SrTiO3 surfaces [J].

Giocondi, JL ;

Rohrer, GS .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (07) :1182-1189

[6] Polarity of oxide surfaces and nanostructures [J].

Goniakowski, Jacek ;

Finocchi, Fabio ;

Noguera, Claudine .

REPORTS ON PROGRESS IN PHYSICS, 2008, 71 (01)

[7] Orientation dependence of charge-transfer processes on TiO2 (anatase) single crystals [J].

Hengerer, R ;

Kavan, L ;

Krtil, P ;

Grätzel, M .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (04) :1467-1472

[8]

Hotsenpiller PAM, 1998, J PHYS CHEM B, V102, P3216

[9] Photoreduction of Ag ion on ZnO single crystal [J].

Kawano, K ;

Komatsu, M ;

Yajima, Y ;

Haneda, H ;

Maki, H ;

Yamamoto, T .

APPLIED SURFACE SCIENCE, 2002, 189 (3-4) :265-270

[10] Soft x-ray photoemission of clean and sulfur-covered polar ZnO surfaces: A view of the stabilization of polar oxide surfaces [J].

Lahiri, Jayeeta ;

Senanayake, Sanjaya ;

Batzill, Matthias .

PHYSICAL REVIEW B, 2008, 78 (15)

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