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.
Copper （II） oxide nanoparticles were incorporated into the pore system of 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 dryoxidized 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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2010年第2期373-377,共5页
Acta Physico-Chimica Sinica
基金
上海市重点学科三期(S30109)资助项目~~
关键词
吸附
介孔碳CMK-3
氧化铜
干法催化氧化
Adsorption
Mesoporous carbon CMK-3
Copper （II） oxide
Catalytic dry oxidation
