期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 572, 期 -, 页码 290-298出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2019.04.014
关键词
Bi12O17Cl2; Semimetal Bi; Composites; Photocatalytic performance; Mechanism
资金
- National Natural Science Foundation of China [21207089]
- SRF for ROCS, SEM.
- Natural Science Foundation of Shanghai [17ZR1419200]
- Shaanxi Thousand Talents Plan-Youth Program Scholars, and science and technology development project of University of Shanghai for Science and Technology [2017KJFZ073]
Photocatalysis has been considered as an environmentally benign and sustainable technology for contaminants remediation and energy storage and the crucial issue is to design and fabricate catalysts with high visible-light sensitivity and photocatalytic performance. In this work, a series of binary-phased semi-metallic Bi decorated Bi12O17Cl2 composites (Bi-BOC) were constructed via a facile in-situ chemical reduction protocol using the NaBH4 as a reducing agent for the first time. X-ray diffraction patterns, X-ray photoelectron spectroscopy, and UV-vis diffuse reflection spectroscopy confirmed the real coexistence of both components that were closely contacted to form heterojunction domains in composites, as indicated by HRTEM observations. Under the visible light illumination, the as-achieved composites especially Bi-BOC-0.25 with the favorable phase composition, exerted efficient catalytic performance not only for degradation of both dye Rhodamine B and antibiotic tetracycline hydrochloride, but also for selective oxidation of benzyl alcohol. The reinforced photocatalytic capacity of these modified BOC series was mainly relevant to the effective separation of charge carriers by semimetal-semiconductor heterostructures, strengthened visible-light harvesting ability caused by the localized surface plasmon resonance effect of zero-valence Bi nanoparticles on surface, and good maintenance of original hierarchical morphology. In addition, active radicals entrapping experiments were carried out to deduce a preliminary photocatalysis mechanism.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据