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Title: Surfactant-thermal method to prepare two novel two-dimensional Mn–Sb–S compounds for photocatalytic applications

Two novel two-dimensional crystalline chalcogenidoantimonates, [MnSb{sub 2}S{sub 4}(N{sub 2}H{sub 4}){sub 2}] (1) and [Mn(tepa)Sb{sub 6}S{sub 10}] (2) (tepa=tetraethylenepentamine), have been successfully synthesized under surfactant-thermal conditions through using PEG-400 and sodium dodecyl sulfate as reaction media, respectively. In compound 1, [MnS{sub 2}N{sub 4}]{sub n}{sup 2n−} species connect [SbS{sub 2}]{sub n}{sup n−} chains via vertex-sharing S atoms to form neutral layered frameworks, while in compound 2, 8-membered windows [Sb{sub 4}S{sub 8}]{sub n}{sup 4n−}, 24-membered windows [Sb{sub 12}S{sub 24}]{sub n}{sup 12n−} and Mn atoms are connected together to form neutral 2D-[MnSb{sub 6}S{sub 10}] layers. All Sb atoms in both complexes form [Sb{sup ⍰}S{sub 3}]{sup 3−} trigonal-pyramid by coordinating with three S atoms. The steep UV–vis absorption edges indicate that 1 and 2 have the band gaps of 1.96 eV and 2.12 eV, respectively. Both compound 1 and 2 show active visible-light-driven photocatalytic properties for hydrogen production. - Graphiacl abstract: Two novel 2D framework sulfides, [MnSb{sub 2}S{sub 4}(N{sub 2}H{sub 4}){sub 2}] (1) and [Mn(tepa)Sb{sub 6}S{sub 10}] (2) (tepa=tetraethylenepentamine), have been successfully synthesized under surfactant-thermal conditions and show active visible-light-driven photocatalytic properties for hydrogen production. - Highlights: • Two novel two-dimensional Mn–Sb–sulfide frameworks. • Synthesis through surfactant-thermal condition. • Photocatalytic properties for hydrogen generation.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [3] ;  [5] ;  [4] ;  [5] ;  [2] ;  [3]
  1. Nanyang Environment and Water Research Institute, Interdisciplinary Graduate School, Nanyang Technological University, 1 Ceantech Loop, Singapore 637141 (Singapore)
  2. (Singapore)
  3. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798 (Singapore)
  4. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
  5. School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459 (Singapore)
Publication Date:
OSTI Identifier:
22436668
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 220; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ATOMS; HYDROGEN; HYDROGEN PRODUCTION; MANGANESE SULFIDES; PHOTOCATALYSIS; SODIUM; SULFATES; SURFACTANTS; SYNTHESIS; TWO-DIMENSIONAL SYSTEMS