湖北农业科学 ›› 2020, Vol. 59 ›› Issue (1): 119-122.doi: 10.14088/j.cnki.issn0439-8114.2020.01.026

• 贮藏·加工 • 上一篇    下一篇

纳米材料Ce-ZnO结构表征及光催化降解罗丹明B染料研究

徐家豪, 陈柔霖, 杨舒怡, 李梦杰, 宋茹, 俞群娣   

  1. 浙江海洋大学食品与医药学院,浙江 舟山 316022
  • 收稿日期:2019-03-27 出版日期:2020-01-10 发布日期:2020-01-10
  • 通讯作者: 宋 茹(1976-),女,教授,博士,主要从事水产品加工与贮藏研究,(电话)18857072074(电子信箱)rusong545@163.com。
  • 作者简介:徐家豪(1998-),男,浙江衢州人,在读本科生,研究方向为食品质量与安全,(电话)18857072074(电子信箱)852648036@qq.com
  • 基金资助:
    浙江海洋大学大学生科技创新项目(2017年); 浙江省大学生科技创新活动计划暨新苗人才计划项目(2018R411053)

Structural characterization of Ce-ZnO nanomaterials and photocatalytic degradation of rhodamine B dye

XU Jia-hao, CHEN Rou-lin, YANG Shu-yi, LI Meng-jie, SONG Ru, YU Qun-di   

  1. College of Food and Medicine,Zhejiang Ocean University,Zhoushan 316022,Zhejiang,China
  • Received:2019-03-27 Online:2020-01-10 Published:2020-01-10

摘要: 以高温热解法制备的纳米ZnO为底物,掺杂稀土元素Ce制备纳米材料Ce-ZnO,采用X-射线衍射分析(XRD)和能谱分析(EDS)表征材料的结构特征和元素组成。以罗丹明B(RhB)染料为单一污水体系,研究Ce-ZnO光催化降解RhB染料效果。XRD分析结果显示纳米材料Ce-ZnO具有六方晶系纤锌矿型结构特征衍射峰,且出现与CeO2相关的衍射峰。EDS分析确定Ce-ZnO中Ce和Zn元素质量比为1∶23.88。Ce-ZnO光催化降解RhB按照一级动力学反应进行,其中在自然光下的一级动力学常数k1为0.039 8,大于紫外光下的一级动力学常数0.024 0,说明掺杂稀土元素Ce能有效提高纳米ZnO在自然光下催化降解RhB。

关键词: 纳米ZnO, Ce掺杂, 光催化罗丹明B, 结构特征, 动力学

Abstract: Ce-doped nano ZnO nanomaterials were prepared by doping rare earth element Ce with nano-ZnO which prepared by pyrolysis at high temperature, and the structural characteristics and element composition of the materials was characterized by X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The effects of Photocatalytic Degradation of Dye RhB Catalyzed by Ce-ZnO was researched in Rhodamine B (RhB) dye as a single sewage system. The result of phase analysis of xray diffraction indicated that the Ce-ZnO catalyst has six crystal wurtzite type structure characteristic diffraction peak and had a diffraction peak of CeO2. The result of energy spectrum showed that the mass ratio of Ce and Zn is 1∶23.88. Photocatalytic degradation of RhB by Ce-ZnO followed the first-orderkinetics, In natural light, the apparent rate constant of RhB degradation catalyzed by nano-material Ce-ZnO is 0.039 8, which is greater than the apparent rate constant under ultraviolet light (0.024 0). It indicated that doping rare earth element Ce could effectively improve the catalytic degradation of RhB by nano-ZnO under natural light.

Key words: nano-ZnO, Ce doping, photocatalysis, rhodamine B, structural characteristics, kinetics

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