| SiO2@BiOCl-Bi24O31Cl10核壳微球的合成及光催化 |
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| 引用本文： | 张鑫,许蕊,路馨语,牛永安. SiO2@BiOCl-Bi24O31Cl10核壳微球的合成及光催化[J]. 化工学报, 1951, 73(8): 3636-3646. DOI: 10.11949/0438-1157.20220358 |
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| 作者姓名： | 张鑫 许蕊 路馨语 牛永安 |
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| 作者单位： | 1.沈阳化工大学化学工程学院，辽宁 沈阳 110142;2.沈阳化工大学材料科学与工程学院，辽宁 沈阳 110142 |
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| 基金项目： | 国家自然科学基金项目(51602206);辽宁省教育厅面上项目(LJKZ0428);辽宁省自然科学基金面上项目(2022-MS-292) |
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| 摘 要： | 调整禁带宽度和抑制光生电子-空穴对复合是提高Bi2O3半导体光催化性能的重要途径。首先采用溶液合成和热处理法成功制备了SiO2@Bi2O3核壳微球，研究了投料比、热处理温度等因素来调控核壳组成和包覆效果。为提高光催化活性，采用Cl掺杂改变SiO2@Bi2O3核壳微球壳层的结构、形貌与组成，通过XRD、SEM、TEM等方法确定了微球壳层为BiOCl-Bi24O31Cl10复合物。调整摩尔比、氨水和NaCl用量等参数，优化SiO2@BiOCl-Bi24O31Cl10核壳微球的均匀包覆效果，大幅提高了对罗丹明B（RhB）的光催化降解效率。在此基础上，阐述了SiO2@Bi2O3核壳微球的形成机理和SiO2@BiOCl-Bi24O31Cl10核壳微球的光催化降解机理。
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| 关 键 词： | 太阳能 催化剂 纳米粒子 复合材料 二氧化硅 |
| 收稿时间： | 2022-03-10 |
Synthesis and photocatalysis of SiO2@BiOCl-Bi24O31Cl10 core-shell microspheres |
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| Xin ZHANG,Rui XU,Xinyu LU,Yong'an NIU. Synthesis and photocatalysis of SiO2@BiOCl-Bi24O31Cl10 core-shell microspheres[J]. Journal of Chemical Industry and Engineering(China), 1951, 73(8): 3636-3646. DOI: 10.11949/0438-1157.20220358 |
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| Authors: | Xin ZHANG Rui XU Xinyu LU Yong'an NIU |
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| Affiliation: | 1.School of Chemical Engineering, Shenyang University of Chemical Techonology, Shenyang 110142, Liaoning, China;2.School of Materials Science and Engineering, Shenyang University of Chemical Techonology, Shenyang 110142, Liaoning, China |
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| Abstract: | Tuning the band gap and suppressing the recombination of photogenerated electron-hole pairs are important ways to improve the photocatalytic performance of Bi2O3 semiconductors. Firstly, SiO2@Bi2O3 core-shell microspheres were successfully prepared by solution synthesis and heat treatment methods. And the core-shell composition and coating effect were controlled by the factors of changing feed ratio and heat treatment temperature. In order to further improve the photocatalytic activity, the structure, morphology and composition of SiO2@Bi2O3 core-shell microspheres were changed by Cl doping. According to XRD, SEM and TEM, the shell structure of the microspheres was determined as BiOCl-Bi24O31Cl10 complex. The uniform coating effect of SiO2@BiOCl-Bi24O31Cl10 core-shell microspheres was optimized by adjusting the molar ratio and dosages of ammonia and NaCl, where the photocatalytic degradation efficiency of rhodamine B was greatly improved. Based on the above results, the formation mechanism of SiO2@Bi2O3 core-shell microspheres and the photocatalytic degradation mechanism of SiO2@BiOCl-Bi24O31Cl10 core-shell microspheres were reasonably proposed. |
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| Keywords: | solar energy catalyst nanoparticles composites silica |
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