Open AccessA Novel Solar Driven Photocatalyst: Well-Aligned Anodic WO3Nanotubes
Author(s) -
Chin Wei Lai,
Sharifah Bee Abd Hamid,
Srimala Sreekantan
Publication year - 2013
Publication title -
international journal of photoenergy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 51
eISSN - 1687-529X
pISSN - 1110-662X
DOI - 10.1155/2013/745301
Subject(s) - tungsten trioxide , materials science , anodizing , photocatalysis , foil method , ammonium fluoride , chemical engineering , anode , electrochemistry , degradation (telecommunications) , electrolyte , tungsten , nuclear chemistry , nanotechnology , chemistry , composite material , metallurgy , electrode , catalysis , organic chemistry , telecommunications , aluminium , computer science , engineering
Well-aligned anodic tungsten trioxide (WO3) nanotubes were successfully synthesized by anodization of W foil at 40 V in a bath with electrolyte composed of 1 M of sodium sulphate (Na2SO4) and 0.5 wt% ammonium fluoride (NH4F). The effect of electrochemical anodization times on the formation mechanism of anodic WO3 nanotubular structure was investigated. It was found that minimum of 15 min is required for completing transformation from W foil to WO3 nanotubular structure with an average diameter of 50 nm and length of 500 nm. The photocatalytic ability of the samples was evaluated by degradation of methyl blue (MB) dye. The results indicate that the surface morphology of anodic WO3 affected the photocatalytic MB degradation significantlyunder solar illumination
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