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Title: SiO{sub 2}/Bi{sub 2}MoO{sub 6} nanocomposites with high photocatalytic activity under visible light irradiation

Highlights: • The SiO{sub 2}/Bi{sub 2}MoO{sub 6} composite photocatalysts were synthesized. • SiO{sub 2}/Bi{sub 2}MoO{sub 6} showed better photocatalytic performance than pure SiO{sub 2} and Bi{sub 2}MoO{sub 6}. • The photocatalytic mechanism of SiO{sub 2}/Bi{sub 2}MoO{sub 6} composite was also proposed. - Abstract: The effect of SiO{sub 2} nanoparticles on Bi{sub 2}MoO{sub 6} photocatalytic performance was described. The results indicated that SiO{sub 2} nanospheres were dispersed on Bi{sub 2}MoO{sub 6} nanosheets to form heterostructures with higher specific surface area and more intensive absorption within the visible light range in comparison with pure Bi{sub 2}MoO{sub 6}. These excellent structural and spectral properties endowed the SiO{sub 2}–Bi{sub 2}MoO{sub 6} composites with enhanced photocatalytic activities. The photocatalytic results for the degradation of Rhodamine B (Rh B) indicated that the most active composite proportion is 13.4%SiO{sub 2}–Bi{sub 2}MoO{sub 6}. The high visible light photocatalytic performance was attributed to the synergistic effect between SiO{sub 2} and Bi{sub 2}MoO{sub 6}, intensive absorption within the visible light range, and high specific surface area. It was also found that the photodegradation of Rh B molecules is mainly attributed to the oxidation action of the generated O{sub 2}·{sup −} radicals and partly to the action of h{sub vb}{sup +}more » through direct hole oxidation process.« less
Authors:
 [1] ; ;  [2] ;  [1] ; ;  [2]
  1. Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Education, Jilin Normal University, Siping 136000 (China)
  2. College of Chemistry, Jilin Normal University, Siping 136000 (China)
Publication Date:
OSTI Identifier:
22420827
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 63; 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:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; BISMUTH COMPOUNDS; COMPARATIVE EVALUATIONS; HOLES; IRRADIATION; MOLECULES; MOLYBDATES; NANOCOMPOSITES; NANOPARTICLES; NANOSTRUCTURES; OPTICAL PROPERTIES; OXIDATION; PHOTOCATALYSIS; RADICALS; SILICON OXIDES; SPECIFIC SURFACE AREA; SYNTHESIS; VISIBLE RADIATION