Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 829, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154436
Keywords
SnSe/g-C3N4 nanocomposites; Ultra-fast photocatalytic performance; p-n heterojunction; Type-II heterostructure
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Funding
- I.A.U, Central Tehran Branch
- I.A.U, Masjed-Soleiman Branch
- Iranian National Science Foundation (INSF) [96010381]
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Pristine single-crystalline SnSe nanoparticle (NPs) and SnSe/g-C3N4 nanocomposites with a high efficient visible-light photocatalytic performance were synthesized by a co-precipitation method in an ambient condition. X-ray diffraction (XRD) patterns indicated an orthorhombic phase for all samples. In addition, the XRD patterns and transmission electron microscopy (TEM) images showed crystallite and particle sizes of the SnSe NPs were decreased by g-C3N4. Mott-Schottky (MS) results of the products indicate a ptype semiconductor behavior for the pristine SnSe NPs, while, it was observed an n-type semiconductor behavior for the SnSe/g-C3N4 nanocomposites. A synergetic effect on the photocatalytic performance of SnSe NPs was observed by g-C3N4 . However, there was an optimum concentration of g-C3N4 (10%) to enhance the photocatalytic performance of the SnSe NPs. The electrical measurement results indicated that p-n heterojunction led to promote efficient interfacial charge transfer between two parts of heterostructure and resulting in increased electron-hole pairs (EHP) lifetime. (C) 2020 Elsevier B.V. All rights reserved.
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