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过程工程学报 ›› 2019, Vol. 19 ›› Issue (1): 195-201.DOI: 10.12034/j.issn.1009-606X.218194

• 材料工程 • 上一篇    下一篇

优化制备粒度均匀分布的Ce-Cu/TiO2空心微球及其光–湿性能

张 浩1,2,3*, 徐远迪1, 刘秀玉1   

  1. 1. 安徽工业大学建筑工程学院,安徽 马鞍山 243032 2. 冶金减排与资源综合利用教育部重点实验室(安徽工业大学),安徽 马鞍山 243002 3. 新加坡国立大学机械工程学院,新加坡 117576
  • 收稿日期:2018-05-02 修回日期:2018-09-29 出版日期:2019-02-22 发布日期:2019-02-12
  • 通讯作者: 张浩
  • 基金资助:
    中国博士后科学基金资助项目;冶金减排与资源综合利用教育部重点实验室(安徽工业大学)资助项目

Optimizing preparation of Ce-Cu/TiO2 hollow microspheres with uniform particle size distribution and its photocatalysis and humidity control performance

Hao ZHANG1,2,3*, Yuandi XU1, Xiuyu LIU1   

  1. 1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma?anshan, Anhui 243032, China 2. Key Laboratory of Metallurgical Emission Reduction and Resources Recycling (Anhui University of Technology), Ministry of Education, Ma?anshan, Anhui 243002, China 3. Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
  • Received:2018-05-02 Revised:2018-09-29 Online:2019-02-22 Published:2019-02-12
  • Contact: ZHANG Hao

摘要: 以Ce(NO3)3?6H2O和Cu(NO3)2?3H2O为改性剂制备Ce–Cu/TiO2空心微球,通过均匀设计与BP神经网络模型优化Ce–Cu/TiO2空心微球的制备工艺参数。用激光粒度分析仪对Ce–Cu/TiO2空心微球的粒度分布进行测试,用SEM和TEM对Ce–Cu/TiO2空心微球的微观形貌进行表征,用比表面积及孔径测定仪对Ce–Cu/TiO2空心微球的孔结构进行测试,采用等温吸放湿法对粒度均匀分布的Ce–Cu/TiO2空心微球的湿性能进行测试,用紫外–可见分光光度计测试其光性能。结果表明,粒度均匀分布的Ce–Cu/TiO2空心微球制备工艺参数为:磁力搅拌速度VMS=910 r/min、溶液B加入溶液A的速度VAB=1.32 mL/min、溶液D加入溶液C的速度VCD=0.86 mL/min、煅烧升温速度VTC=2.47℃/min和煅烧温度TC=485℃,所制空心微球d10=103.74 nm,d50=141.46 nm和d90=188.84 nm,粒径分布区间d90–d10为85.10 nm,空心微球具有良好的光–湿性能,1~6 h对甲醛气体的降解率为21.6%~53.9%,相对湿度32.28%~84.34%的平衡含湿量为0.0364~0.2746 g/g。

关键词: Ce-Cu掺杂, 光-湿性能, TiO2, 均匀粒度分布, 优化制备

Abstract: Cerous nitrate Ce(NO3)3?6H2O and cupric nitrate Cu(NO3)2?3H2O were used as modifier to make Ce–Cu/TiO2 hollow microspheres. The preparation scheme of Ce–Cu/TiO2 hollow microspheres with uniform particle size distribution was optimized by conducting uniform design and building BP neural network model. Particle size distribution of Ce–Cu/TiO2 hollow microspheres was tested and characterized by laser particle size analyzer (LPSA), the microstructure was characterized by SEM and TEM, the pore structure was tested by brunauer–emmett–teller surface areas analyzer (BET). Humidity performance of Ce–Cu/TiO2 hollow microspheres with uniform particle size distribution was tested by isothermal absorption–desorption, the photocatalysis performance was tested by ultraviolet–visible spectrophotometer (UV–Vis). Finally, optimal technology parameters of Ce–Cu/TiO2 hollow microspheres were obtained. The results showed that the magnetic stirring rate (VMS), dropping rate of solution B added to solution A (VAB), dropping rate of solution D added to solution C (VCD), calcination heating rate (VTC), and calcination temperature (TC) were 910 r/min, 1.32 mL/min, 0.86 mL/min, 2.47℃/min and 485℃, respectively. Besides, for Ce–Cu/TiO2 hollow microspheres with uniform particle size distribution, other sizes were shown as follows: d10 =103.74 nm, d50=141.46 nm and d90 =188.84 nm. Particle size distribution interval of d90–d10 was 85.10 nm. It was also proved that Ce–Cu/TiO2 hollow microspheres with uniform particle size distribution had good photocatalysis and humidity control performance. Specifically, degradation rate of formaldehyde gas was 21.6%~53.9% after 1~6 h, and equilibrium moisture content under the relative humidity of 32.28%~84.34% reached 0.0364~0.2746 g/g accordingly. The above research provided certain theoretical basis and technical support for further systematic research on particle size distribution of Ce–Cu/TiO2 hollow microspheres and photocatalysis–humidity control performance.

Key words: Ce-Cu doping, photocatalysis &, humidity performance, TiO2, uniform particle size distribution, optimizing preparation