期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 232, 期 -, 页码 164-174出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2018.03.017
关键词
ZnIn2S4/CdS composite; Three-dimensional (3D) structure; Visible light; Hexavalent chromium (Cr(VI))
资金
- National Key R&D Program of China [2017YFC0210901, 2017YFC0210906]
- National Natural Science Foundation of China [51573122, 21722607, 21776190]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [17KJA430014, 17KJA150009]
- Science and Technology Program for Social Development of Jiangsu [BE2015637]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Nowadays, hexavalent chromium (Cr(VI)) in wastewater seriously threatens ecological systems and human health due to its acute toxicity and potential carcinogenicity. Simultaneously, semiconductor photocatalytic reduction is gaining increasing significant research attention in the treatment of Cr(VI). Hence, three-dimensional (3D) ZnIn2S4/CdS composite photocatalysts, assembled by 1D CdS nanorods and 2D ZnIn2S4 nanosheets, were prepared via a hydrothermal method for reduction of Cr(VI). The composition, microstructure, surface elements and optical properties of the ZnIn2S4/CdS composites were thoroughly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectroscopy. The as-prepared ZnIn2S4/CdS composites showed higher photocatalytic activity for reduction of Cr(VI) compared with pure CdS and ZnIn2S4 under visible light irradiation. Meanwhile, the ZnIn2S4/CdS composite with a mole ratio of 0.33:1 displayed the best photocatalytic activity, with the efficiency for reduction of Cr(VI) (50 mg/L) reaching 100% within 30 min. The 3D heterostructure not only provided a large surface area, but also effectively separated photogenerated electrons and holes. Importantly, the structure and activity of the catalyst were maintained after three cycles, showing its superior stability. The photocatalytic mechanism of the as-prepared composites was also discussed in detail.
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