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Cadmium sulfide quantum dots supported on gallium and indium oxide for visible-light-driven hydrogen evolution from water.

In this work, CdS quantum dots (QDs) supported on GaO and InO are applied for visible‐light‐driven H evolution from aqueous solutions that contain lactic acid. With Pt as the cocatalyst, the H evolution rates on CdS/Pt/GaO and CdS/Pt/InO are as high as 995.8 and 1032.2 μmol h, respectively, under vi... Full description

Journal Title: ChemSusChem September 2014, Vol.7(9), pp.2537-2544
Main Author: Pan, Yun-Xiang
Other Authors: Zhuang, Huaqiang , Hong, Jindui , Fang, Zheng , Liu, Hai , Liu, Bin , Huang, Yizhong , Xu, Rong
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1864-564X ; DOI: 10.1002/cssc.201402334
Link: http://search.proquest.com/docview/1561033073/?pq-origsite=primo
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title: Cadmium sulfide quantum dots supported on gallium and indium oxide for visible-light-driven hydrogen evolution from water.
format: Article
creator:
  • Pan, Yun-Xiang
  • Zhuang, Huaqiang
  • Hong, Jindui
  • Fang, Zheng
  • Liu, Hai
  • Liu, Bin
  • Huang, Yizhong
  • Xu, Rong
subjects:
  • Cadmium Compounds–Chemistry
  • Gallium–Chemistry
  • Hydrogen–Chemistry
  • Indium–Chemistry
  • Light–Chemistry
  • Photochemical Processes–Chemistry
  • Quantum Dots–Chemistry
  • Sulfides–Chemistry
  • Water–Chemistry
  • Cadmium Compounds
  • Sulfides
  • Indium
  • Cadmium Sulfide
  • Water
  • Gallium Oxide
  • Indium Oxide
  • Hydrogen
  • Gallium
  • Cadmium
  • Hydrogen
ispartof: ChemSusChem, September 2014, Vol.7(9), pp.2537-2544
description: In this work, CdS quantum dots (QDs) supported on GaO and InO are applied for visible‐light‐driven H evolution from aqueous solutions that contain lactic acid. With Pt as the cocatalyst, the H evolution rates on CdS/Pt/GaO and CdS/Pt/InO are as high as 995.8 and 1032.2 μmol h, respectively, under visible light (>420 nm) with apparent quantum efficiencies of 43.6 and 45.3 % obtained at 460 nm, respectively. These are much higher than those on Pt/CdS (108.09 μmol h), Pt/GaO (0.12 μmol h), and Pt/InO (0.05 μmol h). The photocatalysts have been characterized thoroughly and their band structures and photocurrent responses have been measured. The band alignment between the CdS QDs and InO can lead to interfacial charge separation, which cannot occur between the CdS QDs and GaO. Among the various possible factors that contribute to the high H evolution rates on CdS/Pt/oxide, the surface properties of the metal oxides play important roles, which include (i) the anchoring of CdS QDs and Pt nanoparticles for favorable interactions and (ii) the efficient trapping of photogenerated electrons from the CdS QDs because of surface defects (such as oxygen defects) based on photoluminescence and photocurrent studies. CdS quantum dots (QDs) supported on Pt/GaO and Pt/InO enhance the photocatalytic activity for H evolution under visible light significantly. The surface properties of the oxide supports play important roles for the highly efficient H evolution, which include (i) the anchoring of CdS QDs and Pt nanoparticles and (ii) the efficient trapping of photogenerated electrons from CdS QDs in the presence of surface defects.
language: eng
source:
identifier: E-ISSN: 1864-564X ; DOI: 10.1002/cssc.201402334
fulltext: fulltext
issn:
  • 1864564X
  • 1864-564X
url: Link


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titleCadmium sulfide quantum dots supported on gallium and indium oxide for visible-light-driven hydrogen evolution from water.
creatorPan, Yun-Xiang ; Zhuang, Huaqiang ; Hong, Jindui ; Fang, Zheng ; Liu, Hai ; Liu, Bin ; Huang, Yizhong ; Xu, Rong
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ispartofChemSusChem, September 2014, Vol.7(9), pp.2537-2544
identifierE-ISSN: 1864-564X ; DOI: 10.1002/cssc.201402334
subjectCadmium Compounds–Chemistry ; Gallium–Chemistry ; Hydrogen–Chemistry ; Indium–Chemistry ; Light–Chemistry ; Photochemical Processes–Chemistry ; Quantum Dots–Chemistry ; Sulfides–Chemistry ; Water–Chemistry ; Cadmium Compounds ; Sulfides ; Indium ; Cadmium Sulfide ; Water ; Gallium Oxide ; Indium Oxide ; Hydrogen ; Gallium ; Cadmium ; Hydrogen
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descriptionIn this work, CdS quantum dots (QDs) supported on GaO and InO are applied for visible‐light‐driven H evolution from aqueous solutions that contain lactic acid. With Pt as the cocatalyst, the H evolution rates on CdS/Pt/GaO and CdS/Pt/InO are as high as 995.8 and 1032.2 μmol h, respectively, under visible light (>420 nm) with apparent quantum efficiencies of 43.6 and 45.3 % obtained at 460 nm, respectively. These are much higher than those on Pt/CdS (108.09 μmol h), Pt/GaO (0.12 μmol h), and Pt/InO (0.05 μmol h). The photocatalysts have been characterized thoroughly and their band structures and photocurrent responses have been measured. The band alignment between the CdS QDs and InO can lead to interfacial charge separation, which cannot occur between the CdS QDs and GaO. Among the various possible factors that contribute to the high H evolution rates on CdS/Pt/oxide, the surface properties of the metal oxides play important roles, which include (i) the anchoring of CdS QDs and Pt nanoparticles for favorable interactions and (ii) the efficient trapping of photogenerated electrons from the CdS QDs because of surface defects (such as oxygen defects) based on photoluminescence and photocurrent studies. CdS quantum dots (QDs) supported on Pt/GaO and Pt/InO enhance the photocatalytic activity for H evolution under visible light significantly. The surface properties of the oxide supports play important roles for the highly efficient H evolution, which include (i) the anchoring of CdS QDs and Pt nanoparticles and (ii) the efficient trapping of photogenerated electrons from CdS QDs in the presence of surface defects.
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titleCadmium sulfide quantum dots supported on gallium and indium oxide for visible-light-driven hydrogen evolution from water.
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titleCadmium sulfide quantum dots supported on gallium and indium oxide for visible-light-driven hydrogen evolution from water.
authorPan, Yun-Xiang ; Zhuang, Huaqiang ; Hong, Jindui ; Fang, Zheng ; Liu, Hai ; Liu, Bin ; Huang, Yizhong ; Xu, Rong
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