A facile preparation of crystalline GeS2 nanoplates and their photocatalytic activity

被引：30

作者：

Wang, Qifan ^{[1
]}

Kang, Shi-Zhao ^{[1
]}

Li, Xiangqing ^{[1
]}

Yang, Ying-Wei ^{[2
]}

Qin, Lixia ^{[1
]}

Mu, Jin ^{[1
]}

机构：

[1] Shanghai Inst Technol, Sch Chem & Environm Engn, Shanghai 201418, Peoples R China

[2] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 631卷

基金：

中国国家自然科学基金;

关键词：

GeS2; Nanoplates; Solvothermal process; Photocatalysis; GERMANIUM SULFIDE; COLLOIDAL GERMANIUM; RAMAN-SCATTERING; NANOPARTICLES; SPECTROSCOPY; ABSORPTION; GLASSES; MOS2; AG;

D O I：

10.1016/j.jallcom.2014.12.259

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：

Crystalline GeS2 nanoplates were prepared by low temperature solvothermal process and characterized with X-ray diffraction, transmission electron microscopy, energy-dispersion X-ray analysis, X-ray photoelectron spectroscopy, nitrogen adsorption, Raman spectroscopy, FT-IR spectroscopy and UV-vis-NIR diffuse reflectance absorption spectroscopy. Photocatalytic hydrogen evolution from water over the asprepared GeS2 nanoplates was explored using Na2S and K2SO3 as sacrificial reagents. The results indicate that the crystalline orthorhombic GeS2 nanoplates can be obtained at 140 degrees C using this simple method and acetic acid as the solvent plays an important role in the formation of the GeS2 nanoplates. More importantly, the as-prepared GeS2 nanoplates can serve as a potential photocatalyst with a rate of H-2 evolution of 144 mu mol g(-1) h(-1) for hydrogen production from water when a xenon lamp is used as a light source. In addition, the formation mechanism of GeS2 nanoplates was preliminarily discussed. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：21 / 25

页数：5

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