物理化学学报 >> 2010, Vol. 26 >> Issue (02): 373-377.doi: 10.3866/PKU.WHXB20100222

催化和表面结构 上一篇    下一篇

载铜介孔碳CMK-3的制备及其对苯酚的吸附-催化氧化性能

胡龙兴, 党松涛, 杨霞萍   

  1. 上海大学环境与化学工程学院, 上海 200444
  • 收稿日期:2009-07-17 修回日期:2009-11-28 发布日期:2010-01-26
  • 通讯作者: 党松涛 E-mail:yanlingjz@gmail.com

Incorporation of CuO into Mesoporous Carbon CMK-3 and Its Adsorption and Catalytic Oxidation of Phenol

HU Long-Xing, DANG Song-Tao, YANG Xia-Ping   

  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, P. R. China
  • Received:2009-07-17 Revised:2009-11-28 Published:2010-01-26
  • Contact: DANG Song-Tao E-mail:yanlingjz@gmail.com

摘要:

通过一种简易的方法在介孔碳CMK-3的孔道内负载氧化铜粒子制备Cu/CMK-3复合物, 利用粉末X射线衍射、氮气吸附-脱附、透射电镜等手段对其进行表征. 结果表明, 氧化铜均匀地分散在CMK-3孔道中, CMK-3在负载氧化铜后仍有较大的比表面积. 考察了载铜CMK-3对水中苯酚的吸附和低温干法催化氧化苯酚性能. 吸附和循环使用结果表明, Cu/CMK-3 对水中苯酚具有较大的吸附量和良好的催化氧化效率. 热重-质谱(TG-MS)联用测试结果表明, 吸附的苯酚在180 ℃左右开始被催化氧化为CO2和水, 此时不会造成苯酚的脱附和介孔碳CMK-3的烧蚀.

关键词: 吸附, 介孔碳CMK-3, 氧化铜, 干法催化氧化

Abstract:

Copper (II) oxide nanoparticles were incorporated into the pore systemof mesoporous carbon CMK-3 by a facile method, forming the composite Cu/CMK-3. Cu/CMK-3 was characterized by powder X-ray diffraction, nitrogen physisorption, and transmission electron microscopy. Results showed that Cu/CMK-3 preserved the ordered mesoporous structure of CMK-3 and copper (II) oxide was dispersed within the CMK-3 channels as small nanoparticles. CMK-3 still had a large surface area after copper (II) oxide was incorporated. The adsorption and catalytic dry oxidation ability of Cu/CMK-3 for phenol was determined. The adsorption and recycle results indicate that Cu/CMK-3 adsorbs aqueous phenol well because of its large surface area. Most of the phenol adsorbed on CMK-3 was catalytically dry-oxidized at relatively low temperature. We demonstrate that Cu/CMK-3 can be used as a sorbent-catalyst for aqueous phenol. After seven cycles, Cu/CMK-3 retained a substantial fraction of its adsorption ability for phenol. A combined thermogravimetry-mass spectroscopy (TG-MS) instrument was used to investigate the catalytic activity and ignition behavior of Cu/CMK-3. Results show that CuO is the active component during the catalytic dry oxidization of phenol. The adsorbed phenol is catalytically dry-oxidized into carbon dioxide and water at the relatively low temperature of about 180 ℃, where no phenol desorption or CMK-3 ignition occurred.

Key words: Adsorption, Mesoporous carbon CMK-3, Copper (II) oxide, Catalytic dry oxidation

MSC2000: 

  • O643