| 摘要: |
| 盐助溶液燃烧法是一项高效简便制备金属氧化物的方法。利用KCl辅助燃烧法制备高光催化活性ZnO纳米颗粒(ZnONPs)。燃烧合成过程中,硝酸锌作为氧化剂,乙醇胺作为燃料,葡萄糖作为模板剂,氯化钾作为助溶剂。通过X射线衍射(XRD)、扫描电镜(SEM)、紫外-可见漫反射光谱(UV-Vis DRS)和傅里叶红外线变换(FTIR)的检测,分析硝酸锌和KCl不同物质的量比时ZnONPs的性质。结果表明:硝酸锌与KCl物质的量比为1∶0.5时,ZnONPs的粒径约为25 nm,纯度高,分散性好且光吸收能力最强;在模拟太阳光的照射下,30 min后该催化剂对环丙沙星和氧氟沙星的降解率分别为95.5％和96.9％;该催化剂经过5次循环催化后,光催化效率仅下降约6％,说明该ZnONPs的稳定性高。 |
| 关键词: 溶液燃烧法 ZnO纳米颗粒 光催化活性 抗生素 |
| DOI：10.3969/j.issn.1673-5005.2020.03.021 |
| 分类号::O 643.36 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目(21563009) |
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| Preparation of ZnONPs with high photocatalytic activity by KCl assisted solution combustion method |
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FU Yunzhi, LI Qiongxia, ZHOU Meishuang
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(School of Science in Hainan University, Haikou 570228, China)
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| Abstract: |
| The salt assisted solution combustion method is an efficient and simple method to prepare metal oxides. KCl-assisted combustion was used to prepare ZnO nanoparticles (ZnONPs) with high photocatalytic activity. In the combustion synthesis process, the zinc nitrate, ethanolamine, glucose and potassium chloride were used as an oxidant, a fuel, a template agent, and a co-solvent, respectively. The properties of ZnONPs with different molar ratios of zinc nitrate and KCl were analyzed by XRD, SEM, UV-vis DRS and FTIR measurement. The results show that the ZnONPs particle size is about 25 nm with high purity, good dispersion and the strongest light absorption ability when the molar ratio of zinc nitrate to KCl is 1∶0.5. After 30 minutes of simulated sunlight, the degradation rates of the catalyst to ciprofloxacin and ofloxacin are 95.5％ and 96.9％, respectively. And after 5 cycles the photocatalytic efficiency of this catalyst only decreases by about 6％, which indicates that the stability of the ZnONPs is high. |
| Key words: solution combustion method ZnO nanoparticles photocatalytic activity antibiotics |
