Exploring the Different Photocatalytic Performance for Dye Degradations over Hexagonal ZnIn2S4 Microspheres and Cubic ZnIn2S4 Nanoparticles
- 12 April 2012
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 4 (4), 2273-2279
- https://doi.org/10.1021/am300272f
Abstract
Different pathways for the degradation of rhodamine (RhB) as well as different activity order for the degradation of RhB and methyl orange (MO) were observed over hexagonal ZnIn2S4 microspheres and cubic ZnIn2S4 nanoparticles. A detailed study of the physicochemical and surface properties of these two ZnIn2S4 polymorphs has been carried out to elucidate these phenomena. The results reveal that hexagonal ZnIn2S4 microspheres are composed of nanolamella petals growing in the ab plane, i.e., the negative (0001) S plane. This negative (0001) S plane not only is favorable for the adsorption of the cationic dye RhB via —N(Et)2 groups but also can accumulate the photogenerated holes. These make the hole-directed photocatalytic de-ethylation of RhB more expedient over hexagonal ZnIn2S4 microspheres. This negative (0001) S plane of hexagonal ZnIn2S4 microspheres also shows promoting effect for the degradation of cationic dye like MB, but not for the degradation of anionic dye like MO. Our result provides some new insights in how the surface facet can take effect on influencing the performance of a photocatalyst and why different polymorphs can exhibit different photocatalytic performance.This publication has 28 references indexed in Scilit:
- Investigation of Photocatalytic Activities over Bi2WO6/ZnWO4 Composite under UV Light and Its Photoinduced Charge Transfer PropertiesACS Applied Materials & Interfaces, 2011
- β-AgAl1-xGaxO2 Solid-Solution Photocatalysts: Continuous Modulation of Electronic Structure toward High-Performance Visible-Light PhotoactivityJournal of the American Chemical Society, 2011
- Semiconductor-mediated photodegradation of pollutants under visible-light irradiationChemical Society Reviews, 2010
- Ag2O/TiO2Nanobelts Heterostructure with Enhanced Ultraviolet and Visible Photocatalytic ActivityACS Applied Materials & Interfaces, 2010
- Sol−Gel Growth of Hexagonal Faceted ZnO Prism Quantum Dots with Polar Surfaces for Enhanced Photocatalytic ActivityACS Applied Materials & Interfaces, 2010
- Fabrication and Characterization of Visible-Light-Driven Plasmonic Photocatalyst Ag/AgCl/TiO2 Nanotube ArraysThe Journal of Physical Chemistry C, 2009
- Visible light-induced photocatalytic activity of delafossite AgMO2 (M=Al, Ga, In) prepared via a hydrothermal methodApplied Catalysis B: Environment and Energy, 2009
- Synergetic Effect of Bi2WO6 Photocatalyst with C60 and Enhanced Photoactivity under Visible IrradiationEnvironmental Science & Technology, 2007
- Titanium dioxide photocatalysisJournal of Photochemistry and Photobiology C: Photochemistry Reviews, 2000
- Environmental Applications of Semiconductor PhotocatalysisChemical Reviews, 1995