Microwave-induced activation of additional active edge sites on the MoS₂ surface for enhanced Hgᴼ capture

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

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 MoS₂ surface. The results showed that Hgᴼcapture efficiency of the adsorbent containing MoS₂ 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 MoS₂ containing material together with DFT study further revealed that the (001) basal planes of MoS₂ 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 MoS₂ surface and led to the improved performance on Hgᴼ capture.

Citation

Zhao, H., Mu, X., Yang, G., Zheng, C., Sun, C., Gao, X., & Wu, T. (2017). Microwave-induced activation of additional active edge sites on the MoS₂ surface for enhanced Hgᴼ capture. Applied Surface Science, 420, 439-445. https://doi.org/10.1016/j.apsusc.2017.05.161

• Journal Article Type: Article
• Acceptance Date: May 18, 2017
• Online Publication Date: May 22, 2017
• Publication Date: 2017-10
• Deposit Date: Jul 20, 2017
• Publicly Available Date: Jul 20, 2017
• Journal: Applied Surface Science
• Print ISSN: 0169-4332
• Electronic ISSN: 0169-4332
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 420
• Pages: 439-445
• DOI: https://doi.org/10.1016/j.apsusc.2017.05.161
• Keywords: MoS₂surface; Mercury capture; Microwave irradiation; Additional active edge site
• Public URL: https://nottingham-repository.worktribe.com/output/861569
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0169433217315167?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Microwave-induced activation of additional active edge sites on the MoS2 surface for enhanced Hg0 capture; Journal Title: Applied Surface Science; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.apsusc.2017.05.161; Content Type: article; Copyright: © 2017 Elsevier B.V. All rights reserved.