CAJ | 학술논문

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CO_2和水,此时不会造成苯酚的脱附和介孔碳CMK-3的烧蚀.
통과일충간역적방법재개공탄CMK-3적공도내부재양화동입자제비Cu/CMK-3복합물,이용분말X사선연사、담기흡부,탈부、투사전경등수단대기진행표정.결과표명,양화동균균지분산재CMK-3공도중,CMK-3재부재양화동후잉유교대적비표면적.고찰료재동CMK-3대수중분분적흡부화저온간법최화양화분분성능.흡부화순배사용결과표명,Cu/CMK-3대수중분분구유교대적흡부량화량호적최화양화효솔.열중-질보(TG-MS)련용측시결과표명,흡부적분분재180℃좌우개시피최화양화위CO_2화수,차시불회조성분분적탈부화개공탄CMK-3적소식.
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 naooparticles. 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.