Improved photoelectrochemical water oxidation under visible light with mesoporous CoWO4

Herein, a hydrothermal synthesis of nanocrystalline cobalt tungstate (m-CoWO4) with mesoporous texture in the presence of amphiphilic organosilane surfactant is described. As-prepared nanocrystals are spherical in shape with size between 8 and 10nm consisting of monoclinic (wolframite structure) pha...

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Bibliographic Details
Published inMaterials letters Vol. 183; pp. 281 - 284
Main Authors Ahmed, M.I., Adam, A., Khan, A., Rehman, A.u., Qamaruddin, M., Siddiqui, M.N., Qamar, M.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.11.2016
Subjects
Absorption
CoWO4
Hydrothermal
Mesoporous
Nanocrystals
Oxidation
Photoelectrochemical oxidation
Surface area
Surface chemistry
Surface layer
Texture
Tungstates
CoWO4
Photoelectrochemical oxidation
Mesoporous
Hydrothermal
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Summary:Herein, a hydrothermal synthesis of nanocrystalline cobalt tungstate (m-CoWO4) with mesoporous texture in the presence of amphiphilic organosilane surfactant is described. As-prepared nanocrystals are spherical in shape with size between 8 and 10nm consisting of monoclinic (wolframite structure) phase. In addition, these nanocrystals are endowed with high surface area (50m2g−1), textured mesoporous surface and absorption threshold into visible region. Furthermore, these textured and fine nanocrystals exhibit improved photoelectrochemical activity (PEC), as compared to non-mesoporous CoWO4, under visible light (λ>420nm) for water oxidation in a photoelectrochemical cell. •Synthesis of mesoporous CoWO4 nanoparticles.•Amphiphilic organosilane surfactant was utilized to generate mesoporosity.•Significantly improved visible-light-driven photoelectrochemical water oxidation with mesoporous CoWO4.
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ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2016.07.137