New SnS2/La2Ti2O7 heteroj unction photocatalyst with enhanced visible-light activity

被引：45
作者：
Chen, Jun [1 ]
Liu, Shuangzhi [2 ]
Zhang, Li [1 ]
Chen, Na [1 ]
机构：
[1] Henan Inst Sci & Technol, Sch Chem & Chem Engn, Xinxiang 453003, Peoples R China
[2] Kaifeng Univ, Chem & Engn Dept, Kaifeng 475004, Peoples R China
来源：
MATERIALS LETTERS | 2015年 / 150卷
关键词：
Semiconductors; Nanocomposites; Powder technology; Functional; HIGH-PERFORMANCE; HYDROTHERMAL SYNTHESIS; AQUEOUS CR(VI); SOLVOTHERMAL SYNTHESIS; REDUCTION; LA2TI2O7; SNS2; NANOPARTICLES; WATER; NANOCRYSTALS;
D O I：
10.1016/j.matlet.2015.02.134
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work took the initiative to study the synthesis and photocatalytic properties of a new visible-light-active SnS2/La2Ti2O7 heterojunction photocatalyst. SnS2/La2Ti2O7 nanoheterojunctions were synthesized via hydrothermal treatment of SnCl4 center dot 5H(2)O, thioacetamide and La2Ti2O7 nanosheets in deionized water at 130 degrees C for 6 h. The structure, composition, and optical property of the as-synthesized SnS2/La2Ti2O7 nanoheterojunctions were characterized by powder X-ray diffraction, wavelength dispersive X-ray fluorescence spectroscopy, transmission electron microscopy and UV-vis diffuse reflectance spectra. The photocatalytic activity of the as-synthesized SnS2/La2Ti2O7 nanoheterojunctions was tested in the reduction of aqueous Cr(VI) under visible-light (lambda > 420 nm) irradiation, and compared with those of SnS2 nanoparticles and La2Ti2O7 nanosheets. It was observed that SnS2/La2Ti2O7 nanoheterojunctions exhibited much higher photocatalytic activity than SnS2 nanoparticles, whereas La2Ti2O7 nanosheets exhibited no photocatalytic activity in the reduction of aqueous Cr(VI) under visible-light (lambda > 420 nm) irradiation. The reasons accounting for the photocatalytic results were also proposed. (C) 2015 Elsevier B.V. All rights reserved.
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页码：44 / 47
页数：4
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