A micelle fusion-aggregation assembly approach to mesoporous carbon materials with rich active sites for ultrasensitive ammonia sensing

Wei Luo, Tao Zhao, Yuhui Li, Jing Wei, Pengcheng Xu, Xinxin Li, Youwei Wang, Wenqing Zhang, Ahmed A. Elzatahry, Abdulaziz Alghamdi, Yonghui Deng, Lianjun Wang, Wan Jiang, Yong Liu, Biao Kong, Dongyuan Zhao

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94 Citations (Scopus)

Abstract

Nanostructured carbon materials have received considerable attention due to their special physicochemical properties. Herein, ordered mesoporous carbons (OMCs) with two-dimension (2D) hexagonal mesostructure and unique buckled large mesopores have successfully been synthesized via a micelle fusion-aggregation assembly method by using poly(ethylene oxide)-block-polystyrene (PEO-b-PS) diblock copolymers as a template and resorcinol-based phenolic resin as a carbon precursor. The obtained ordered mesoporous carbons possess unique fiber-like morphology, specific surface area of 571-880 m2/g, pore volume of 0.54 cm3/g and large mesopores (up to 36.3 nm) and high density of active sites (i.e., carboxylic groups) of 0.188/nm2. Gas sensor based on the ordered mesoporous carbons exhibits an excellent performance in sensing NH3 at a low temperature with fast response (<2 min), ultralow limit of detection (<1 ppm), and good selectivity, due to the large pore sizes, high surface area and rich active sites in the carbon pore walls.
Original languageEnglish
Pages (from-to)12586-12595
Number of pages10
JournalJournal of the American Chemical Society
Volume138
Issue number38
DOIs
Publication statusPublished - 28 Sep 2016
Externally publishedYes

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