Template-free synthesis of nanostructured CdxZn1-xS with tunable band structure for H2 production and organic dye degradation using solar light

Garaje S.N., Apte S.K., Naik S.D., Ambekar J.D., Sonawane R.S., Kulkarni M.V., Vinu A. and Kale B.B. (2013) Template-free synthesis of nanostructured CdxZn1-xS with tunable band structure for H2 production and organic dye degradation using solar light. Environmental Science and Technology, 47 12: 6664-6672. doi:10.1021/es3045955


Author Garaje S.N.
Apte S.K.
Naik S.D.
Ambekar J.D.
Sonawane R.S.
Kulkarni M.V.
Vinu A.
Kale B.B.
Title Template-free synthesis of nanostructured CdxZn1-xS with tunable band structure for H2 production and organic dye degradation using solar light
Formatted title
Template-free synthesis of nanostructured CdxZn1-xS with tunable band structure for H2 production and organic dye degradation using solar light
Journal name Environmental Science and Technology   Check publisher's open access policy
ISSN 0013-936X
1520-5851
Publication date 2013-06
Year available 2013
Sub-type Article (original research)
DOI 10.1021/es3045955
Open Access Status
Volume 47
Issue 12
Start page 6664
End page 6672
Total pages 9
Place of publication Washington, DC United States
Publisher American Chemical Society
Collection year 2014
Formatted abstract
We have demonstrated a template-free large-scale synthesis of nanostructured CdxZn1-xS by a simple and a low-temperature solid-state method. Cadmium oxide, zinc oxide, and thiourea in various concentration ratios are homogenized at moderate temperature to obtain nanostructured CdxZn1-xS. We have also demonstrated that phase purity of the sample can be controlled with a simple adjustment of the amount of Zn content and nanocrystalline CdxZn1-xS (x = 0.5 and 0.9) of the hexagonal phase with 6-8 nm sized and 4-5 nm sized Cd 0.1Zn0.9S of cubic phase can be easily obtained using this simple approach. UV-vis and PL spectrum indicate that the optical properties of as synthesized nanostructures can also be modulated by tuning their compositions. Considering the band gap of the nanostructured Cd xZn1-xS well within the visible region, the photocatalytic activity for H2 generation using H2S and methylene blue dye degradation is performed under visible-light irradiation. The maximum H 2 evolution of 8320 μmol h-1g-1 is obtained using nanostructured Cd0.1Zn0.9S, which is four times higher than that of bulk CdS (2020 μmol h-1 g-1) and the reported nanostructured CdS (5890 μmol h-1g-1). As synthesized Cd0.9Zn0.1S shows 2-fold enhancement in degradation of methylene blue as compared to the bulk CdS. It is noteworthy that the synthesis method adapted provides an easy, inexpensive, and pollution-free way to synthesize very tiny nanoparticles of CdxZn1-xS with a tunnable band structure on a large scale, which is quite difficult to obtain by other methods. More significantly, environmental benign enhanced H2 production from hazardous H2S using Cd xZn1-xS is demonstrated for the first time.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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