摘要
ZnO半导体因为具有独特的光催化降解有机污染物的能力,已经成为当前化学研究的热点。本文采用蒸汽相法合成金属—有机框架化合物ZIF-8作为锌源前驱体,将其高温热解制备ZnO纳米粒子;在合成ZIF-8的过程中,引入稀土Ce进行原位掺杂,在此基础上得到了一系列Ce掺杂的ZnO纳米粒子(Ce/ZnO)。通过XRD、SEM、EDX、 FT-IR等手段对所得材料的结构、形貌等物理化学性能进行表征分析;以罗丹明B为降解对象,考察了所得ZnO半导体的光催化性能。结果表明:通过在ZIF-8锌源中掺入Ce元素,可调控终产物ZnO纳米粒子的形貌,适量的Ce元素掺杂,可改善ZnO半导体的催化性能,且该法制备的Ce/ZnO能保持较高的循环催化活性与再生催化活性。
Recently,the nano-scaled Zn O semiconductor particle has been widely studied because of its outstanding photocatalysis property.In this paper,a series of rare earth Ce doped ZnO semiconductor nanoparticles(Ce/ZnO)are synthesized by the pyrolysis method with the metal-organic framework ZIF-8 precursor prepared via vapor phase method.The resulted nanoparticles have been characterized with FTIR,XRD,SEM and EDX methods,and evaluated with photocatalytic activity of all samples via the degradation capacity to a Rhodamine B solution under the 365 nm UV light;The influence of Ce element on the morphology and photocatalytic activity of ZnO has also been explored.The results show that the Ce is well-doped into ZnO particles,and the resulted Ce/ZnO has a better photocatalytic reaction rate.Furthermore,the Ce/ZnO catalyst exhibits photocatalytic stability and could be regenerated by a simply calcine produce.
作者
吴昌松
李佳欣
孙青
许盛皓
赵徐雯
李秋平
贾志舰
WU Changsong;LI Jiaxin;SUN Qing;XU Shenghao;ZHAO Xuwen;LI Qiuping;JIA Zhijian(Ningbo University of Technology,Ningbo,Zhejiang,315211,China)
出处
《宁波工程学院学报》
2019年第1期12-18,共7页
Journal of Ningbo University of Technology
基金
浙江省自然科学基金(LQ14B010001)
浙江省新苗人才项目(2017R424029)
关键词
光催化
半导体
掺杂
氧化锌
铈
photocatalysis
semiconductors
doping
ZnO
Ce