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过程工程学报 ›› 2018, Vol. 18 ›› Issue (5): 1068-1074.DOI: 10.12034/j.issn.1009-606X.218127

• 材料工程 • 上一篇    下一篇

ZnO/C/TiO2复合纳米材料制备及其光催化性能

谢桂香1, 魏基坚1, 胡志彪1,2*, 郑瑞娟1,2   

  1. 1. 龙岩学院化学与材料学院,福建 龙岩 364012 2. 龙岩学院福建省清洁能源材料重点实验室,福建 龙岩 364012
  • 收稿日期:2018-02-01 修回日期:2018-03-23 出版日期:2018-10-22 发布日期:2018-10-12
  • 通讯作者: 谢桂香 275210827@qq.com
  • 基金资助:
    MOFs掺杂纳米二氧化钛的制备及其光催化性能;金属氧化物微纳米结构在水污染处理中的应用研究;手性多孔联苯型金属-有机骨架材料的不对称合成与性能研究

Preparation and photocatalytic properties of ZnO/C/TiO2 nanoparticles

Guixiang XIE1, Jijian WEI1, Zhibiao HU1,2*, Ruijuan ZHENG1,2   

  1. 1. College of Chemistry and Material Science, Longyan University, Longyan, Fujian 364012, China 
    2. Fujian Provincial Key Laboratory of Clean Energy Materials, Longyan University, Longyan, Fujian 364012, China
  • Received:2018-02-01 Revised:2018-03-23 Online:2018-10-22 Published:2018-10-12

摘要: 以金属有机骨架MOF-5为前驱体,在氮气气氛下高温处理得ZnO/C,通过水热法将ZnO/C负载到TiO2中获得ZnO/C/TiO2纳米复合光催化剂,对其晶体结构、形貌特征、成分等进行了表征,采用正交实验法考察了MOF-5处理温度、ZnO/C负载量、钛酸丁酯加入量对复合光催化剂催化降解甲基橙性能的影响. 结果表明,TiO2的比表面积为87.5 m2/g, ZnO/C/TiO2的比表面积为109.0 m2/g. 制备ZnO/C/TiO2的最佳条件为MOF-5处理温度600℃,ZnO/C负载量0.07 g,钛酸丁酯加入量1.5 mL. 甲基橙用紫外灯照射90 min,以TiO2为催化剂时降解率为62.1%,以ZnO/C/TiO2为催化剂时降解率达99.5%,光催化活性大大提高.

Abstract: The use of materials such as grapheme and metal organic framworks to enhance the electronic transmission capacity of semiconductor photocatalytic materials has become increasingly popular. In the experiment, ZnO/C was obtained from the metal organic framework MOF-5, which was used as precursor, by high-temperature treatment under nitrogen atmosphere. Then the nanocomposite photocatalyst ZnO/C/TiO2 composite was prepared by hydrothermal method using TiO2 as the basic particles. The crystal structure, morphology and composition properties of the samples were characterized by the approaches such as XRD, SEM, energy spectrum, surface area analyzer and porosity analyzer. By using orthogonal experiment method, the effects of MOF-5 treatment temperature was evaluated, and the influence of doping amount of ZnO/C and adding amount of butyl titanate on the photocatalytic properties of photocatalyst to methyl orange degradation were investigated by the orthogonal test as well. The results showed that the particle size of ZnO/C/TiO2 composite was 11.89 nm, the size of the sample was evenly distributed, and the particle size was nano-level, no agglomeration, the specific surface areas of TiO2 and ZnO/C/TiO2 were 87.5 and 109.0 m2/g, the average pore radius of them were 2.72 and 2.61 nm. The best conditions for the preparation of ZnO/C/TiO2 were as follows: MOF-5 was treated under 600℃, ZnO/C doping amount of 0.07 g, and addtion 1.5 mL of butyl titanate. After 90 min irradiation under UV light, the degradation rate of methyl orange was 62.1% with TiO2 as photocatalyst, the degradation rate was improved greatly to 99.5% with ZnO/C/TiO2 as photocatalyst. The catalytic activity increased substantially.