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题名: A study of oxidizing centers in carbon nanotubes by solid-state NMR
作者: Shen, Wanling1;  Li, Xin1;  Liu, Xin2
刊名: RSC ADVANCES
发表日期: 2015
DOI: 10.1039/c5ra07605f
卷: 5, 期:74, 页:60380-60385
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Functionalized carbon nanotubes (CNTs) play an important role as catalysts in several oxidation reactions. Active centers, present in a catalyst, are mainly associated with oxidizing functional groups. Therefore, determining the concentration of oxidizing centers from the various functional groups present on the surface of CNTs is very important, but it is yet to be achieved. In the present study, solid-state NMR SSNMR techniques were employed to study the adsorption behavior of trimethylphosphine (TMP) in CNTs using TMP as a probe molecule. The results show that TMP gets oxidized to TMPO (trimethylphosphine oxide). The concentration of oxidizing centers was also selectively measured in the order of sub-mmol per g, employing SSNMR. The oxidizing centers comprise a very small portion among the various functional groups present on the surface of CNTs. The concentration of oxidizing centers was found to increase as the degree of functionalization of CNTs increased. Further studies are required to understand the exact structure of oxidizing centers present in CNTs.
关键词[WOS]: HIGH-RESOLUTION XPS ;  OXIDATIVE DEHYDROGENATION ;  PROBE MOLECULE ;  ACID SITES ;  AMMONIA-SYNTHESIS ;  ZEOLITE-Y ;  CATALYSTS ;  OXIDE ;  TRIMETHYLPHOSPHINE ;  SURFACE
语种: 英语
WOS记录号: WOS:000358230400069
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146408
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Henan Univ Technol, Coll Chem & Chem Engn, Zhengzhou 450001, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Shen, Wanling,Li, Xin,Liu, Xin. A study of oxidizing centers in carbon nanotubes by solid-state NMR[J]. RSC ADVANCES,2015,5(74):60380-60385.
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