新型 BiVO/BiS/MoS n-p 异质结的简易制备及其在自然光下增强光催化活性用于污染物降解。

Facile fabrication of novel BiVO/BiS/MoS n-p heterojunction with enhanced photocatalytic activities towards pollutant degradation under natural sunlight.

机构信息

School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan 453007, PR China.

Soochow Institute for Energy and Materials InnovationS, Soochow University, Suzhou, Jiangsu 215006, PR China.

出版信息

J Colloid Interface Sci. 2017 Nov 1;505:805-815. doi: 10.1016/j.jcis.2017.06.085. Epub 2017 Jun 27.

DOI:10.1016/j.jcis.2017.06.085

PMID:28672260

Abstract

The novel three-component BiVO/BiS/MoS heterojunction was successfully fabricated through a facile in-situ hydrothermal method based on the formation of the intermediate BiS by coupling BiVO and MoS precursor. The BiS was easily formed attributing to the strong interaction between Biand S ions with the aid of the hydrothermal reaction. The photocatalytic performances of samples were systematically investigated via the photocatalytic degradation of Rhodamine B (RhB), methylene blue (MB) and malachite green (MG) under solar light irradiation. As a result, the photocatalytic degradation rate of BM-10 for RhB, MB and MG are 97%, 93% and 94%, respectively. The enhanced photocatalytic activities could be due to the suppression of charge recombination and the enhanced the visible light absorption of BiVO/BiS/MoS heterojunction.

摘要

新型三组分 BiVO/BiS/MoS 异质结通过一种简便的原位水热法成功制备，该方法基于通过耦合 BiVO 和 MoS 前体形成中间 BiS。BiS 很容易形成，这归因于 Bi 和 S 离子在水热反应的辅助下的强相互作用。通过在太阳光照射下光催化降解罗丹明 B（RhB）、亚甲基蓝（MB）和孔雀石绿（MG），系统地研究了样品的光催化性能。结果表明，BM-10 对 RhB、MB 和 MG 的光催化降解率分别为 97%、93%和 94%。增强的光催化活性可能是由于抑制了电荷复合和增强了 BiVO/BiS/MoS 异质结对可见光的吸收。