A Simple Gas-Solid Route To Functionalize Ordered Carbon

作者：Variava Meherzad F^*; Church Tamara L; Husin Agus; Harris Andrew T; Minett Andrew I

来源：ACS Applied Materials & Interfaces, 2014, 6(4): 2910-2916.

DOI：10.1021/am405484g

• NO oxidation
• gas functionalization
• CNT oxidation
• MWCNTs

The reaction of nitric oxide (NO) and carbonaceous materials generates nitrogen functionalities on and in graphitic carbons and oxidizes some of the carbon. Here, have exploited these phenomena to provide a novel route to surface-functionalized multiwalled carbon nanotubes (MWCNTs). We investigated the impacts of NO on the physical and chemical properties of industrially synthesized multiwalled carbon nanotubes to find a facile treatment that increased the specific surface area (S-BET) of the MWCNTs by similar to 20%, with only a minimal effect on their degree of graphitization. The technique caused less material loss (similar to 12 wt %) than traditional gas-based activation techniques, and grafted some nitrogen functional groups (1.1 at. %) on the MWCNTs. Moreover, we found that Ni nanoparticles deposited on NO-treated MWCNTs had a crystallite size of d(Ni) = 13.1 nm, similar to those deposited on acid-treated MWCNTs (d(Ni) = 14.2 nm), and clearly much smaller than those deposited under the same conditions on untreated MWCNTs (d(Ni) = 18.3 nm).

• 出版日期2014-2-26