摘要
采用液相和固相两种方法,制备出Cu掺杂ZnO纳米粒子,并利用XRD、TEM和TG-DTA等技术对其进行表征和分析.通过在可见光下对甲基橙进行光催化降解,探讨不同的制备方法、铜掺杂量、焙烧温度、催化剂浓度、溶液pH等因素对甲基橙降解率的影响.结果表明,采用固相法、焙烧温度为450℃,Cu掺杂量为1%,催化剂用量为0.67g.L-1,甲基橙溶液(20mg.L-1)的pH为6.0时,光催化剂对甲基橙的降解效果最好,其降解率达89.70%.
Cu-doped ZnO nanoparticles were prepared by liquid phase method and solid state reaction,respectively.The obtained particles were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM） and TG-DTA techniques.The photocatalytic activity of the as-obtained samples was evaluated by degradation of methyl orange（MO） under visible light irradiation.The influence of different synthesized methods,Cu^2＋ doping content,calcination temperature,photocatalyst concentrations,pH values of MO solution on the degradation rate of MO were investigated in detail.The results show that the best photocatalytic activity for the degradation of MO was obtained by solid state reaction when the doping concentrations of Cu^2＋ is 1%,calcination at 450℃,the photocatalyst content is 0.67g·L^-1 and MO solution（20mg·L^-1） prepared at pH 6.0,the degradation rate is up to 89.70%.
出处
《湖南理工学院学报（自然科学版）》
CAS
2010年第4期50-53,57,共5页
Journal of Hunan Institute of Science and Technology(Natural Sciences)
基金
湖南省教育厅优秀青年资助项目(10B042)
湖南省科技计划资助项目(2010NK3008)
关键词
ZnO
掺铜
光催化
降解
甲基橙
ZnO
Cu2＋ doping
photocatalytic
degradation
methyl orange
