One-step synthesis of urchinlike SnS/SnS2 heterostructures with superior visible -light photocatalytic performance

被引：55
|
作者：
Yao, Kaili [1 ]
Li, Jun [1 ]
Shan, Shaoyun [1 ]
Jia, Qingming [1 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Chem Engn, Kunming 650500, Yunnan, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2017年 / 101卷
基金：
中国国家自然科学基金;
关键词：
SnS/SnS2; Urchinlike; Heterogeneous composites; Photocatalysts; Mechanism; HYDROTHERMAL SYNTHESIS; NANO-PARTICLES; SNS2; HETEROJUNCTION; REDUCTION; MECHANISM; PHOTODEGRADATION; NANOPARTICLES; DEGRADATION; OXIDATION;
D O I：
10.1016/j.catcom.2017.07.019
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：
Urchinlike SnS/SnS2 p-n heterogeneous composite photocatalysts were successfully synthesized by a one-step solvothermal method. The samples are characterized by XRD, XPS, SEM, TEM, BET and DRS. SnS/SnS2 (Sn/S = 39.87:60.13) heterostructure exhibited the higher photocatalytic activity, the removal efficiency of MO was 83.25% in illuminate 60 min, and degradation reaction was calculated by adopting the pseudo-first-order reaction kinetics, the k value was 3.351 x 10(-2) min (-1) which was higher than pure SnS and pure SnS2 under visible light irradiation. The mechanism of enhanced photocatalytic activity has been discussed through scavenger experiments. In addition, the main active species for degradation of methyl orange (MO) were investigated using electron spin resonance (ESR) measurement and the possible degradation pathway of MO was also presented.
引用
收藏
页码：51 / 56
页数：6
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