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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Preparation and photocatalytic degradation of OD Cd-In-S solid solution

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0D Cd-In-S 固溶体的制备及其光催化降解性能研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Aug.2024, Vol.47 No.8: 1100-1105

DOI: 10.3969/j.issn.1003-5060.2024.08.014

Authors

YU Hao, CHEN Yanyan, WANG Shuang, LI Zhiqiang, LI Shenjie, HU Qi

(School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: Due to the S 3p orbital, the valence band of metal sulfide with narrow band gap has higher energy level position, which has aroused great interest in the field of degradation of organic pollutants by visible light. In this paper, 0D Cd-In-S ternary solid solution was prepared by one-step preparation method, and its catalytic degradation of methyl orange(MO) under visible light was investigated. The structure, morphology and optical properties of the solid solution nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), and UV-vis spectroscopy. It is found that the alloyed Cd-In-S solid solution has better properties than CdS and $ In_{2}S_{3} $. The degradation efficiency of $ Cd_{0.7}In_{0.3}S_{1.15} $ to MO was up to 93.47% within 60 min, which was much higher than that of CdS and $ In_{2}S_{3} $. The electrochemical data shows that the high degradation efficiency comes from the appropriate band gap position and bandwidth, as well as the higher separation efficiency of photogenerated electron-hole pair.

Keywords: nanocrystals; 0D Cd-In-S ternary solid solution; photocatalysis; methyl orange(MO); visible light

作者信息

余昊，陈艳艳，王爽，李智强，李伸杰，胡齐

（合肥工业大学化学与化工学院，安徽合肥230009）

摘要和关键词

摘要: 由于含有 S3p 轨道,窄带隙金属硫化物的价带具有更高能级位置,能利用可见光降解有机污染物。文章通过一步法制备 0D Cd-In-S 三元固溶体,并考察其在可见光下催化降解甲基橙(methyl orange, MO)的性能。通过 X 射线衍射(X-ray diffraction, XRD)、透射电子显微镜(transmission electron microscope, TEM)、紫外-可见吸收光谱(UV-vis)等测试手段对固溶体纳米颗粒的结构、形貌和光学性能进行表征。研究发现,与 CdS、In $ _{2} $S $ _{3} $ 相比,合金化后的 Cd-In-S 固溶体具有更为优异的性质,其中 Cd $ _{0.7} $In $ _{0.3} $S $ _{1.15} $ 在 60 min 内对 MO 的降解效率可达 93.47%,远高于纯 CdS 和 In $ _{2} $S $ _{3} $;电化学研究数据表明,高降解效率来自于适宜的带隙位置和带宽以及更高的光生电子空穴对分离效率。

关键词: 纳米晶；0D Cd-In-S 三元固溶体；光催化；甲基橙(MO)；可见光

Funding

国家自然科学基金青年科学基金资助项目（51502070）；安徽省自然科学基金资助项目（1808085ME111）和中央高校基本科研业务费专项资金资助项目（JZ2018YYPY0307；JZ2019YYPY0032；JZ2021HGTB0121；JZ2021HGTB0099）

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