Facile synthesis of Zn-rich (GaN)1-x(ZnO)x solid solutions using layered double hydroxides as precursors

被引：71

作者：

Wang, Junpeng ^{[1
]}

Huang, Baibiao ^{[1
]}

Wang, Zeyan ^{[1
]}

Wang, Peng ^{[1
]}

Cheng, Hefeng ^{[1
]}

Zheng, Zhaoke ^{[1
]}

Qin, Xiaoyan ^{[1
]}

Zhang, Xiaoyang ^{[1
]}

Dai, Ying ^{[2
]}

Whangbo, Myung-Hwan ^{[3
]}

机构：

[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China

[3] N Carolina State Univ, Raleigh, NC 27695 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 12期

基金：

中国国家自然科学基金;

关键词：

VISIBLE-LIGHT; SOLUTION PHOTOCATALYST; STABLE PHOTOCATALYST; PHYSICAL-PROPERTIES; HIGHLY EFFICIENT; WATER; GAN; PERFORMANCE; HYDROGEN; WO3;

D O I：

10.1039/c0jm04277c

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：

(GaN)(1-x)(ZnO)(x) solid solutions are potential photocatalysts for water splitting and environmental decontamination under visible light. Solid solutions prepared by the traditional method are not effective because of their low Zn content (x < 0.5). Here, we show that Zn-rich solid solutions (similar to 0.5 < x < similar to 0.8) are readily prepared by the nitridation of layered double hydroxides (LDHs) containing Zn2+ and Ga3+ ions, and that the Zn content is easily adjusted by changing the Zn/Ga ratio of the LDH precursors. The band gap of (GaN)(1-x)(ZnO)(x) decreases gradually from 2.60 eV at x = 0.46 to 2.37 eV at x = 0.81. The Zn-rich solid solutions absorb strongly above 500 nm, and these solutions loaded with 1 wt% Pt are found to be efficient for photoreducing Cr6+ ions under visible light.

引用

页码：4562 / 4567

页数：6

共 26 条

[1] PHOTOELECTROLYSIS AND PHYSICAL-PROPERTIES OF SEMICONDUCTING ELECTRODE WO3 [J].

BUTLER, MA .

JOURNAL OF APPLIED PHYSICS, 1977, 48 (05) :1914-1920

[2] HYDROTALCITE-TYPE ANIONIC CLAYS: PREPARATION, PROPERTIES AND APPLICATIONS [J].

Cavani, F. ;

Trifiro, F. ;

Vaccari, A. .

CATALYSIS TODAY, 1991, 11 (02) :173-301

[3] In Situ XRD Studies of ZnO/GaN Mixtures at High Pressure and High Temperature: Synthesis of Zn-Rich (Ga1-xZnx)(N1-xOx) Photocatalysts [J].

Chen, Haiyan ;

Wang, Liping ;

Bai, Jianming ;

Hanson, Jonathan C. ;

Warren, John B. ;

Muckerman, James T. ;

Fujita, Etsuko ;

Rodriguez, Jose A. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (04) :1809-1814

[4]

DINESCU M, 1998, APPL SURF SCI, V559, P127

[5] VISIBLE-LIGHT-INDUCED O-2 GENERATION FROM AQUEOUS DISPERSIONS OF WO3 [J].

ERBS, W ;

DESILVESTRO, J ;

BORGARELLO, E ;

GRATZEL, M .

JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (18) :4001-4006

[6] Structural, electrical and optical properties of zinc nitride thin films prepared by reactive rf magnetron sputtering [J].

Futsuhara, M ;

Yoshioka, K ;

Takai, O .

THIN SOLID FILMS, 1998, 322 (1-2) :274-281

[7] An oxynitride, TaON, as an efficient water oxidation photocatalyst under visible light irradiation (λ ≤ 500 nm) [J].

Hitoki, G ;

Takata, T ;

Kondo, JN ;

Hara, M ;

Kobayashi, H ;

Domen, K .

CHEMICAL COMMUNICATIONS, 2002, (16) :1698-1699

[8] Electronic structure of ZnO:GaN compounds: Asymmetric bandgap engineering [J].

Huda, Muhammad N. ;

Yan, Yanfa ;

Wei, Su-Huai ;

Al-Jassim, Mowafak M. .

PHYSICAL REVIEW B, 2008, 78 (19)

[9] First-principles studies of the structural and electronic properties of the (Ga1-xZnx)(N1-xOx) solid solution photocatalyst [J].

Jensen, Lin Lin ;

Muckerman, James T. ;

Newton, Marshall D. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (09) :3439-3446

[10] Efficient photochemical water splitting by a chemically modified n-TiO2 2 [J].

Khan, SUM ;

Al-Shahry, M ;

Ingler, WB .

SCIENCE, 2002, 297 (5590) :2243-2245

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