Journal ArticleDOI
One-step hydrothermal synthesis of high-performance visible-light-driven SnS2/SnO2 nanoheterojunction photocatalyst for the reduction of aqueous Cr(VI)
Yong Cai Zhang,Yong Cai Zhang,Long Yao,Geshan Zhang,Dionysios D. Dionysiou,Dionysios D. Dionysiou,Jing Li,Xihua Du +7 more
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TLDR
In this article, a simple and cost-effective one-step hydrothermal method, which was based on the reactions of tin(IV) chloride pentahydrate and different dosages of thioacetamide in water at 190°C for 6h, was employed for the synthesis of composition-tunable SnS 2 /SnO 2 nanoheterojunctions.Abstract:
A simple and cost-effective one-step hydrothermal method, which was based on the reactions of tin(IV) chloride pentahydrate and different dosages of thioacetamide in water at 190 °C for 6 h, was employed for the synthesis of composition-tunable SnS 2 /SnO 2 nanoheterojunctions (e.g., SnS 2 /SnO 2 -A, SnS 2 /SnO 2 -B and SnS 2 /SnO 2 -C). The photocatalytic properties of the as-synthesized SnS 2 /SnO 2 nanoheterojunctions were tested by the reduction of aqueous Cr(VI) under visible-light ( λ > 420 nm) irradiation. Furthermore, the photocatalytic efficiency of SnS 2 /SnO 2 -B was compared with those of PM-SnS 2 /SnO 2 (which denotes the physically mixed SnS 2 /SnO 2 nanocomposite with the same composition as SnS 2 /SnO 2 -B) and SnS 2 nanoflakes at different dosages of photocatalysts. It was observed that (i) the photocatalytic activities of the as-synthesized SnS 2 /SnO 2 nanoheterojunctions depended on their compositions, and SnS 2 /SnO 2 -B with 70 mol% SnS 2 displayed the highest photocatalytic activity; (ii) SnS 2 /SnO 2 -B invariably exhibited higher photocatalytic efficiencies than PM-SnS 2 /SnO 2 and SnS 2 nanoflakes at different dosages of photocatalysts; (iii) the washing with 1 mol/L HNO 3 can effectively regenerate the used photocatalyst; (iv) SnS 2 /SnO 2 -B exhibited good photocatalytic stability in reuses, with regeneration by 1 mol/L HNO 3 -washing after each cycle of photocatalytic use; and (v) Cr(VI) was reduced to Cr(III). The possible formation mechanism of SnS 2 /SnO 2 nanoheterojunctions and the reasons accounting for the photocatalytic results were also discussed.read more
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Fabrication of Bi2MoO6/ZnO hierarchical heterostructures with enhanced visible-light photocatalytic activity
TL;DR: In this paper, a series of Bi2MoO6/ZnO hierarchical heterostructured photocatalysts were synthesized by a solvothermal method and their performance was evaluated with visible-light irradiation.
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Cu2O/BiVO4 heterostructures: synthesis and application in simultaneous photocatalytic oxidation of organic dyes and reduction of Cr(VI) under visible light
Qing Yuan,Lang Chen,Miao Xiong,Jie He,Sheng Lian Luo,Chak Tong Au,Chak Tong Au,Shuang-Feng Yin +7 more
TL;DR: In this article, the authors synthesize a composite of Cu2O/BiVO4 nanoparticles for the simultaneous oxidation of organic dyes and reduction of Cr(VI) in neutral media.
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Exceptional synergistic enhancement of the photocatalytic activity of SnS2 by coupling with polyaniline and N-doped reduced graphene oxide
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Journal ArticleDOI
Preparation of ZnIn2S4 nanosheet-coated CdS nanorod heterostructures for efficient photocatalytic reduction of Cr(VI)
TL;DR: In this paper, three-dimensional (3D) ZnIn2S4/CdS composite photocatalysts, assembled by 1D CdS nanorods and 2D ZnS4 nanosheets, were prepared via a hydrothermal method for reduction of hexavalent chromium (Cr(VI) in wastewater.
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Facile construction of MoO3@ZIF-8 core-shell nanorods for efficient photoreduction of aqueous Cr (VI)
Yifan Zhang,Soo-Jin Park +1 more
TL;DR: In this paper, a 3D MoO3/ZIF-8 core-shell nanorod composite photocatalysts were prepared via a facile two-step method and applied to the reduction of hexavalent chromium (Cr(VI) in wastewater.
References
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A review on the visible light active titanium dioxide photocatalysts for environmental applications
Miguel Pelaez,Nicholas T. Nolan,Suresh C. Pillai,Michael K. Seery,Polycarpos Falaras,Athanassios G. Kontos,Psm Dunlop,Jwj Hamilton,John Byrne,Kevin E. O'Shea,Mh. Entezari,Dionysios D. Dionysiou +11 more
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Colloidal heterostructured nanocrystals: Synthesis and growth mechanisms
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TL;DR: In this paper, a review of recent progress in the wet-chemical development of hybrid nanocrystals (HNCs) based on functional associations of semiconductors, metals and magnetic compounds is presented.
Journal ArticleDOI
Novel visible-light-driven AgX/graphite-like C3N4 (X = Br, I) hybrid materials with synergistic photocatalytic activity
TL;DR: The photocatalytic activity of the AgX/g-C 3 N 4 hybrid materials was evaluated using methyl orange as a target organic pollutant in this article, which was attributed to the synergic effect between g-C and AgX, which included the optical property, the better dispersion and the small size.
Journal ArticleDOI
Synthesis of g-C3N4/SmVO4 composite photocatalyst with improved visible light photocatalytic activities in RhB degradation
TL;DR: In this article, a graphitic carbon nitride (g-C 3 N 4 ) and SmVO 4 composite photocatalysts which were prepared through a simple mixing-calcination method were reported.
Journal ArticleDOI
Enhancement of Visible-Light Photocatalysis by Coupling with Narrow-Band-Gap Semiconductor: A Case Study on Bi2S3/Bi2WO6
TL;DR: The present study provides a new strategy to design composite materials with enhanced photocatalytic performance by designing a novel Bi( 2)S(3)/Bi(2)WO(6) composite photocatalyst that exhibits significantly enhanced photoc atalytic activity for phenol degradation under visible light irradiation.