| 核壳结构CdS@C纳米复合材料的光催化性能研究 |
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| 引用本文： | 张克诚,马强,王健,马龙,卢强,韦琪龙,魏智强,乔宏霞.核壳结构CdS@C纳米复合材料的光催化性能研究[J].人工晶体学报,2020,49(12):2336-2343. |
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| 作者姓名： | 张克诚 马强 王健 马龙 卢强 韦琪龙 魏智强 乔宏霞 |
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| 作者单位： | 甘肃第五建设集团有限责任公司,天水 741000;兰州理工大学理学院,兰州 730050;兰州理工大学理学院,兰州 730050;兰州理工大学土木工程学院,兰州 730050;兰州理工大学土木工程学院,兰州 730050 |
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| 基金项目： | 国家自然科学基金(51261015);甘肃省自然科学基金(1308RJZA238);甘肃省青年科技基金(2017GS10910) |
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| 摘 要： | 采用水热碳化法成功制备了不同碳含量的CdS@C纳米颗粒,同时对CdS@C的晶体结构、形貌、光学性能、光电化学和光催化性能进行了研究。实验结果表明本方法制备的碳包覆CdS纳米颗粒外壳为碳层,内核为六方纤锌矿结构CdS颗粒。CdS@C颗粒分散性良好,颗粒形貌主要为类球形,粒度均匀。X射线光电子能谱(XPS)证实CdS@C颗粒表面负载的碳主要以非晶碳形式存在。紫外-可见光光谱(UV-Vis)表明CdS@C纳米晶中表面碳的敏化作用提高了可见光响应范围,使得能隙变窄。光致发光光谱(PL)表明碳包覆CdS@C纳米颗粒的发光强度比纯CdS弱,有效抑制了光生载流子的复合。瞬态光电流响应和电化学阻抗谱(EIS)说明CdS@C纳米复合材料更有效促进电子-空穴对分离和提高转移效率。CdS@C纳米复合材料在可见光辐射下表现出良好的光催化活性和稳定性,其中·O2-和h+在光催化中起主要作用。
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| 关 键 词： | 碳包覆 CdS 核壳结构 光电化学性能 光催化 CdS@C纳米复合材料 |
Photocatalytic Properties of Core-Shell Structure CdS@C Nanocomposites |
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| ZHANG Kecheng,MA Qiang,WANG Jian,MA Long,LU Qiang,WEI Qilong,WEI Zhiqiang,QIAO Hongxia.Photocatalytic Properties of Core-Shell Structure CdS@C Nanocomposites[J].Journal of Synthetic Crystals,2020,49(12):2336-2343. |
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| Authors: | ZHANG Kecheng MA Qiang WANG Jian MA Long LU Qiang WEI Qilong WEI Zhiqiang QIAO Hongxia |
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| Affiliation: | 1. Gansu Fifth Construction Group Company, Tianshui 741000, China; 2. School of Science, Lanzhou University of Technology, Lanzhou 730050, China; 3. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
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| Abstract: | CdS@C nanoparticles with different carbon content were successfully prepared by hydrothermal carbonization method, and the phase structure, morphology, optical, photoelectric chemistry and photocatalytic properties of CdS@C were studied. The experimental results show that the shell is successfully prepared as carbon layer, and the hexahedrite structure CdS is used as CdS@C particles in the core. The morphology of CdS@C particles is mainly spherical, with uniform particle size and good dispersion. XPS spectra confirm that the carbon loading on the surface of CdS@C particles mainly existe in the form of amorphous carbon. UV-Vis spectra show that the sensitization of surface carbon in CdS@C nanocrystals increase the visible light response range and narrowed the energy gap. PL show that the luminescence intensity of carbon-coated CdS@C nanoparticles is weaker than that of pure CdS, which effectively inhibited the electron-hole pair recombination. Transient photocurrent response and electrochemical impedance spectroscopy (EIS) indicate that CdS@C nanocomposite have a good optical response and show more efficient photocarrier separation and transfer efficiency. CdS@C nanocomposite exhibites good photocatalytic activity and stability under visible light radiation, and ·O2- and h+ play major roles in photocatalysis. |
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| Keywords: | carbon-encapsulated CdS core-shell structure photoelectric chemistry photocatalytic CdS@C nanocomposite |
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