一步温和水热法制备具有改善光催化活性和稳定性的碳包覆CdS纳米粒子

doi:10.1016/S1872-2067(15)60827-0

催化学报 ›› 2015, Vol. 36 ›› Issue (7): 1077-1085.DOI: 10.1016/S1872-2067(15)60827-0

一步温和水热法制备具有改善光催化活性和稳定性的碳包覆CdS纳米粒子

邹帅, 伏再辉, 向超, 吴文锋, 汤森培, 刘亚纯, 尹笃林

湖南师范大学化学化工学院, 石化新材料与资源精细利用国家地方联合工程实验室, 资源精细化与先进材料湖南省高校重点实验室, 化学生物学及中药分析教育部重点实验室, 湖南长沙410081

收稿日期:2015-01-14 修回日期:2015-02-27 出版日期:2015-06-12 发布日期:2015-07-30
通讯作者: 伏再辉, 电话: (0731)88872576; 传真: (0731)88872531; 电子信箱: fzhhnnu@126.com
基金资助:
国家自然科学基金(20873040); 高等学校博士学科点专项科研基金(20124306110005); 湖南省自然科学基金(10JJ2007, 14JJ2148); 湖南省高校科学技术创新团队.

Mild, one-step hydrothermal synthesis of carbon-coated CdS nanoparticles with improved photocatalytic activity and stability

Shuai Zou, Zaihui Fu, Chao Xiang, Wenfeng Wu, Senpei Tang, Yachun Liu, Dulin Yin

National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province and Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, Hunan, China

Received:2015-01-14 Revised:2015-02-27 Online:2015-06-12 Published:2015-07-30
Supported by:
This work was supported by the National Natural Science Fundation of China (20873040), the Specialized Research Fund for the Doctoral Program of Higher Education (20124306110005), the Natural Science Fund of Hunan Province (10JJ2007, 14JJ2148), and the Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province.

摘要/Abstract

摘要：

首次报道在130 oC低温条件下, 以乙酸镉和葡萄糖分别作为镉源和碳源, 硫脲同时充当硫源和葡萄糖水热碳化的催化剂, 通过一步水热碳化法制备了碳包覆的CdS (CdS@C)纳米材料. 与相同条件下制备的纯CdS相比, 合成的CdS@C粒子具有更小的粒子尺寸、良好的分散性以及更均匀的粒子分布. 而且, 葡萄糖在水热碳化过程中能够促使CdS优先形成立方晶相. 此外, 粒子表面的碳物种能拓宽CdS的可见光吸收范围, 稍微降低它的带隙能, 减缓CdS的光生电子-空穴对的复合和光腐蚀. 因此, 它能改善CdS在可见光辐射下催化氧化降解甲基橙的活性和稳定性.

关键词: 葡萄糖碳化, 碳包覆的硫化镉, 光催化降解, 可见光, 甲基橙

Abstract:

Carbon-coated CdS (CdS@C) nanoparticles were conveniently prepared by a one-step hydrothermal carbonization method at temperature as low as 130 ℃, in which cadmium acetate and glucose were used as the cadmium and carbon sources, respectively, and thiourea was used as the sulfur source and catalyst for the hydrothermal carbonization of glucose. The prepared CdS@C particles possess a smaller size, better dispersion, and more uniform distribution than pure CdS particles prepared under the same conditions. Furthermore, the hydrothermal carbonization of glucose easily induces the prior formation of metastable cubic CdS crystals. In addition, the carbonaceous species coated on the surface of CdS expands the range of absorption light and slightly decreases the band gap of CdS, as well as reduces the recombination of the photogenerated electron-hole pairs of CdS and its photo-oxidative corrosion, which can improve the photocatalytic activity and stability of CdS for the photo-oxidative degradation of methyl orange in aqueous solution under visible light irradiation.

Key words: Glucose carbonization, Carbon-coated cadmiun sulfide, Photo-oxidative degradation, Visible light irradiation, Methyl orange

邹帅, 伏再辉, 向超, 吴文锋, 汤森培, 刘亚纯, 尹笃林. 一步温和水热法制备具有改善光催化活性和稳定性的碳包覆CdS纳米粒子[J]. 催化学报, 2015, 36(7): 1077-1085.

Shuai Zou, Zaihui Fu, Chao Xiang, Wenfeng Wu, Senpei Tang, Yachun Liu, Dulin Yin. Mild, one-step hydrothermal synthesis of carbon-coated CdS nanoparticles with improved photocatalytic activity and stability[J]. Chinese Journal of Catalysis, 2015, 36(7): 1077-1085.

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一步温和水热法制备具有改善光催化活性和稳定性的碳包覆CdS纳米粒子

Mild, one-step hydrothermal synthesis of carbon-coated CdS nanoparticles with improved photocatalytic activity and stability

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