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A study of oxidizing centers in carbon nanotubes by solid-state NMR
Shen, Wanling1; Li, Xin1; Liu, Xin2
刊名RSC ADVANCES
2015
DOI10.1039/c5ra07605f
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
关键词[WOS]HIGH-RESOLUTION XPS ; OXIDATIVE DEHYDROGENATION ; PROBE MOLECULE ; ACID SITES ; AMMONIA-SYNTHESIS ; ZEOLITE-Y ; CATALYSTS ; OXIDE ; TRIMETHYLPHOSPHINE ; SURFACE
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.
语种英语
WOS记录号WOS:000358230400069
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146408
专题中国科学院大连化学物理研究所
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
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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.
APA Shen, Wanling,Li, Xin,&Liu, Xin.(2015).A study of oxidizing centers in carbon nanotubes by solid-state NMR.RSC ADVANCES,5(74),60380-60385.
MLA Shen, Wanling,et al."A study of oxidizing centers in carbon nanotubes by solid-state NMR".RSC ADVANCES 5.74(2015):60380-60385.
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