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现代化工  2019, Vol. 39 Issue (6): 89-94    DOI: 10.16606/j.cnki.issn0253-4320.2019.06.018
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
可见光下钴掺杂氧化锌光催化活性的调控
蔡磊, 翟保改, 徐月华, 黄远明
常州大学数理学院, 江苏 常州 213164
Modulation of photocatalytic property of Co-doped ZnO under visible light
CAI Lei, ZHAI Bao-gai, XU Yue-hua, HUANG Yuan-Ming
School of Mathematics & Physics, Changzhou University, Changzhou 213164, China
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摘要 为了提高可见光的光催化效率,以ZnCl2、Co(NO32·6H2O、NaOH为原料,利用共沉淀法合成高结晶性的钴掺杂摩尔分数为1%~5%的氧化锌粉末。利用X射线衍射、扫描电子显微镜、紫外-可见吸收光谱等手段对钴掺杂的氧化锌粉末样品的形貌、结构和光学性质进行表征。结果表明,合成的氧化锌粉末在整个可见光区都有吸收。当钴掺杂摩尔分数为3%时纳米氧化锌光催化活性最优,光催化反应速率常数为1.739 6×10-3 min-1。基于第一性原理计算了掺钴氧化锌晶体的能带结构,结果表明,位于650 nm的吸收峰来源于氧化锌中价带到杂质能级或杂质能级到导带的电子跃迁。掺钴氧化锌可增加可见光的光催化效率。
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蔡磊
翟保改
徐月华
黄远明
关键词:  钴掺杂氧化锌  光催化活性  可见光  第一性原理计算    
Abstract: In order to improve the photocatalytic efficiency of visible light,highly crystalline Co-doped ZnO powders with different Co2+ doping concentrations (1 mol%-5 mol%) are prepared by a co-precipitation method using ZnCl2,Co(NO3)2·6H2O and NaOH as reactants.The morphology,crystal structure and optical property of the Co-doped ZnO samples are characterized by X-Ray diffraction,scanning electron microscopy and UV-Vis absorption spectroscopy.It is indicated that the resultant ZnO powders have an absorption band in the whole visible light region.ZnO powders with a Co-doping concentration of 3 mol% exhibits the highest photocatalytic activity with its first-order rate constant of 1.739 6×10-3 min-1.The band structures and defect level of ZnO are calculated based on first principle.It is found that the sharp absorption peak at 650 nm can be assigned to the transitions of ZnO electron from its valence band to impurity level or from impurity level to the conduction band.The experimental results show that Co-doped ZnO may help visible light increase photocatalytic efficiency.
Key words:  Co-doped ZnO    photocatalytic activity    visible light    first principle calculations
收稿日期:  2018-10-11      修回日期:  2019-04-08          
ZTFLH:  O643.31  
基金资助: 国家自然科学基金项目(11574036,11604028)
通讯作者:  黄远明(1966-),男,博士,教授,研究方向为光电材料和荧光材料,通讯联系人,dongshanisland@126.com。    E-mail:  dongshanisland@126.com
作者简介:  蔡磊(1993-),男,硕士研究生,研究方向为光催化,996377531@qq.com
引用本文:    
蔡磊, 翟保改, 徐月华, 黄远明. 可见光下钴掺杂氧化锌光催化活性的调控[J]. 现代化工, 2019, 39(6): 89-94.
CAI Lei, ZHAI Bao-gai, XU Yue-hua, HUANG Yuan-Ming. Modulation of photocatalytic property of Co-doped ZnO under visible light. Modern Chemical Industry, 2019, 39(6): 89-94.
链接本文:  
http://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2019.06.018  或          http://www.xdhg.com.cn/CN/Y2019/V39/I6/89
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