Microwave-induced activation of additional active edge sites on the MoS 2 surface for enhanced Hg 0 capture

Haitao Zhao, Xueliang Mu, Gang Yang, Chengheng Zheng, Chenggong Sun, Xiang Gao, Tao Wu

    Research output: Journal PublicationArticlepeer-review

    22 Citations (Scopus)
    2 Downloads (Pure)

    Abstract

    In recent years, significant effort has been made in the development of novel materials for the removal of mercury from coal-derived flue gas. In this research, microwave irradiation was adopted to induce the creation of additional active sites on the MoS 2 surface. The results showed that Hg 0 capture efficiency of the adsorbent containing MoS 2 nanosheets being microwave treated was as high as 97%, while the sample prepared via conventional method only showed an efficiency of 94% in its first 180 min testing. After the adsorbent was treated by microwave irradiation for 3 more times, its mercury removal efficiency was still noticeably higher than that of the sample prepared via conventional method. Characterization of surface structure of the MoS 2 containing material together with DFT study further revealed that the (001) basal planes of MoS 2 crystal structure were cracked into (100) edge planes (with an angle of approximately 75°) under microwave treatment, which subsequently resulted in the formation of additional active edge sites on the MoS 2 surface and led to the improved performance on Hg 0 capture.

    Original languageEnglish
    Pages (from-to)439-445
    Number of pages7
    JournalApplied Surface Science
    Volume420
    DOIs
    Publication statusPublished - 31 Oct 2017

    Keywords

    • Additional active edge site
    • Mercury capture
    • Microwave irradiation
    • MoS surface

    ASJC Scopus subject areas

    • Chemistry (all)
    • Condensed Matter Physics
    • Physics and Astronomy (all)
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films

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