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Edge-Enriched Molybdenum Disulfide Ultrathin Nanosheets with a Widened Interlayer Spacing for Highly Efficient Gaseous Elemental Mercury Capture.
Liu, Cao; Xiang, Kaisong; Li, Junyuan; Li, Chaofang; Liu, Lele; Shen, Fenghua; Liu, Hui.
Afiliación
  • Liu C; School of Metallurgy and Environment, Central South University, Changsha 410083, China.
  • Xiang K; School of Metallurgy and Environment, Central South University, Changsha 410083, China.
  • Li J; School of Metallurgy and Environment, Central South University, Changsha 410083, China.
  • Li C; School of Metallurgy and Environment, Central South University, Changsha 410083, China.
  • Liu L; School of Metallurgy and Environment, Central South University, Changsha 410083, China.
  • Shen F; School of Metallurgy and Environment, Central South University, Changsha 410083, China.
  • Liu H; State Key Laboratory of Advanced Metallurgy for Non-Ferrous Metals, Central South University, Changsha 410083, China.
Environ Sci Technol ; 57(26): 9884-9893, 2023 07 04.
Article en En | MEDLINE | ID: mdl-37319319
Transition metal sulfides have exhibited remarkable advantages in gaseous elemental mercury (Hg0) capture under high SO2 atmosphere, whereas the weak thermal stability significantly inhibits their practical application. Herein, a novel N,N-dimethylformamide (DMF) insertion strategy via crystal growth engineering was developed to successfully enhance the Hg0 capture ability of MoS2 at an elevated temperature for the first time. The DMF-inserted MoS2 possesses an edge-enriched structure and an expanded interlayer spacing (9.8 Å) and can maintain structural stability at a temperature as high as 272 °C. The saturated Hg0 adsorption capacities of the DMF-inserted MoS2 were measured to be 46.91 mg·g-1 at 80 °C and 27.40 mg·g-1 at 160 °C under high SO2 atmosphere. The inserted DMF molecules chemically bond with MoS2, which prevents possible structural collapse at a high temperature. The strong interaction of DMF with MoS2 nanosheets facilitates the growth of abundant defects and edge sites and enhances the formation of Mo5+/Mo6+ and S22- species, thereby improving the Hg0 capture activity at a wide temperature range. Particularly, Mo atoms on the (100) plane represent the strongest active sites for Hg0 oxidation and adsorption. The molecule insertion strategy developed in this work provides new insights into the engineering of advanced environmental materials.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Mercurio Idioma: En Revista: Environ Sci Technol Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
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Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Mercurio Idioma: En Revista: Environ Sci Technol Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos