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A study of oxidizing centers in carbon nanotubes by solid-state NMR
Shen, Wanling1; Li, Xin1; Liu, Xin2
Source PublicationRSC ADVANCES
2015
DOI10.1039/c5ra07605f
Volume5Issue:74Pages:60380-60385
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Multidisciplinary
WOS Research AreaChemistry
WOS KeywordHIGH-RESOLUTION XPS ; OXIDATIVE DEHYDROGENATION ; PROBE MOLECULE ; ACID SITES ; AMMONIA-SYNTHESIS ; ZEOLITE-Y ; CATALYSTS ; OXIDE ; TRIMETHYLPHOSPHINE ; SURFACE
AbstractFunctionalized 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.
Language英语
WOS IDWOS:000358230400069
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/146408
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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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