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WO"3 thin films for photoelectrochemical purification of water [An article from: Chemosphere]
Book Details
PublisherElsevier
ISBN / ASINB000PDSNVA
ISBN-13978B000PDSNV2
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Chemosphere, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Tungsten trioxide thin films on transparent substrates (glass and F:SnO"2 or ITO-coated glass) were prepared by layer-by-layer brush painting and spin-coating using organic precursors. Well-crystallized WO"3 with monoclinic structure was formed on all substrates after annealing at 500^oC or above. The dense semiconducting films are specular and transparent outside the band-gap. Their photoactivity in junctions with aqueous electrolytes extends up to 470nm, with incident photon to current conversion efficiencies around 0.9 at 313nm and up to 0.1 at 436nm. Films of 10cmx10cm were used for the study of solute degradation reactions in a thin-film reactor under backside illumination. Dilute aqueous solutions of model substances for contaminants like oxalic acid were decomposed under continuous flow using broadband UVA illumination and electrical bias. Operation under solar illumination was also feasible. The advantage over operation without bias (conventional photocatalysis) prevailed for all decomposition reactions studied.
Description:
Tungsten trioxide thin films on transparent substrates (glass and F:SnO"2 or ITO-coated glass) were prepared by layer-by-layer brush painting and spin-coating using organic precursors. Well-crystallized WO"3 with monoclinic structure was formed on all substrates after annealing at 500^oC or above. The dense semiconducting films are specular and transparent outside the band-gap. Their photoactivity in junctions with aqueous electrolytes extends up to 470nm, with incident photon to current conversion efficiencies around 0.9 at 313nm and up to 0.1 at 436nm. Films of 10cmx10cm were used for the study of solute degradation reactions in a thin-film reactor under backside illumination. Dilute aqueous solutions of model substances for contaminants like oxalic acid were decomposed under continuous flow using broadband UVA illumination and electrical bias. Operation under solar illumination was also feasible. The advantage over operation without bias (conventional photocatalysis) prevailed for all decomposition reactions studied.
