Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 162, Issue -, Pages 187-195Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2014.06.052
Keywords
Cuprous sulfide; Self-assembly; Superlattice; Scalable synthesis; Photocatalytic degradation
Funding
- National Natural Foundation of China [11274066, 51172047, 50872145, 51102050]
- Ministry of Science and Technology of China (973 Project) [2013CB932901, 2009CB930803]
- Shanghai Municipal Education Commission
- Shanghai Education Development Foundation [09SG01]
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Size- and shape-tunable Cu2S nanoparticles were successfully synthesized via a facile one-pot solvothermal process and appreciable yields at gram-scale were achieved in every single reaction. By meticulous observation with a high resolution transmission electron microscope, intensively existing atomic-level superlattice structures were identified and perceived as a result of the coexistence of both chalcocite and chalcocite-M phase in as-obtained Cu2S nanoparticles. Further, 3D ordered self-assemblies of pristine Cu2S nanoparticles were obtained by introducing the polar solvent, ethanol, into the non-polar colloidal dispersion systems during the post-treatment process, and thereby the double-superlattice (DSL) nanoparticle systems consisted of both atomic- and particle-level superlattice structures were achieved. And as promising photocatalysts, although the photocatalytic activity was influenced mutually by the size, shape, crystallinity, atomic-level superlattice structures of pristine Cu2S nanoparticles and their self-assembling behavior, the novel structured DSL nanoparticle systems finally demonstrated highly enhanced photocatalytic efficiency towards the degradation of methylene blue. (C) 2014 Elsevier B.V. All rights reserved.
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