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Synthesis of SnS and ZnS Hollow Microarchitectures Decorated with Nanostructures and Their Photocatalytic Behavior for Dye Degradation
Author(s) -
Pomar Cesar D.,
Souza Aryane T.,
Sombrio Guilherme,
Souza Flavio L.,
Bonvent Jean J.,
Souza Jose A.
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201800383
Subject(s) - materials science , photocatalysis , layer (electronics) , orthorhombic crystal system , chemical engineering , evaporation , microstructure , nanostructure , phase (matter) , nanotechnology , hexagonal phase , degradation (telecommunications) , metal , catalysis , crystal structure , composite material , crystallography , metallurgy , organic chemistry , chemistry , telecommunications , physics , computer science , engineering , thermodynamics
SnS and ZnS hollow microarchitectures decorated with nanostructures were synthesized by catalysis free thermal evaporation technique using metal microwires and sulfur powder as starting materials. For SnS, we observed a microtube formation comprised of a thin metallic Sn layer in the inner surface, SnS orthorhombic structure thick layer with SnS nanostructures on the top. For ZnS, we found out the formation of hollow sphere with a thin metallic layer in the inner part, a thick cubic phase layer of ZnS, and on this second phase, nanostructures of ZnS hexagonal crystal phase grew up homogeneously. The surface tension, intrinsic to liquids, induces the formation of a microsphere in ZnS sample in order to minimize the surface area. ZnS and SnS hollow semiconducting microstructures have exhibited efficient activity to degrade the methylene blue under simulated sunlight irradiation. The results reveal that ZnS microstructures have higher photoactivity to organic degradation when compare to SnS in the same time interval. The observed results demonstrate the potential of thermal evaporation process without any catalyst material as a simple, fast and efficient route to obtain hollow hierarchically micro/nano architectures of SnS and ZnS with enhanced photocatalytic activity.