Flux-assisted synthesis of SnNb2O6 for tuning photocatalytic properties

Handle URI:
http://hdl.handle.net/10754/563197
Title:
Flux-assisted synthesis of SnNb2O6 for tuning photocatalytic properties
Authors:
Noureldine, Dalal ( 0000-0002-8230-9903 ) ; Anjum, Dalaver H.; Takanabe, Kazuhiro ( 0000-0001-5374-9451 )
Abstract:
A flux-assisted method was used to synthesize SnNb2O6 as a visible-light-responsive metal oxide photocatalyst. The role of flux was investigated in detail using different flux to reactant molar ratios (1 : 1, 3 : 1, 6 : 1, 10 : 1, and 14 : 1) and different reaction temperatures (300, 500, and 600 °C). The obtained products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance UV-Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), the Brunauer-Emmett-Teller method (BET), and high resolution scanning transmission electron microscopy (HRTEM). Flux-assisted synthesis led to tin niobate particles of platelet morphology with smooth surfaces. The synthesized crystal showed a 2D anisotropic growth along the (600) plane as the flux ratio increased. The particles synthesized with a high reactant to flux ratio (1 : 10 or higher) exhibited slightly improved photocatalytic activity for hydrogen evolution from an aqueous methanol solution under visible radiation (λ > 420 nm). The photo-deposition of platinum and PbO2 was examined to gain a better understanding of electrons and hole migration pathways in these layered materials. The HR-STEM observation revealed that no preferential deposition of these nanoparticles was observed depending on the surface facets of SnNb 2O6. This journal is © the Partner Organisations 2014.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division; Advanced Nanofabrication, Imaging and Characterization Core Lab; Chemical Science Program; Core Labs; Catalysis for Energy Conversion (CatEC)
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Physical Chemistry Chemical Physics
Issue Date:
2014
DOI:
10.1039/c4cp00654b
Type:
Article
ISSN:
14639076
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorNoureldine, Dalalen
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorTakanabe, Kazuhiroen
dc.date.accessioned2015-08-03T11:37:57Zen
dc.date.available2015-08-03T11:37:57Zen
dc.date.issued2014en
dc.identifier.issn14639076en
dc.identifier.doi10.1039/c4cp00654ben
dc.identifier.urihttp://hdl.handle.net/10754/563197en
dc.description.abstractA flux-assisted method was used to synthesize SnNb2O6 as a visible-light-responsive metal oxide photocatalyst. The role of flux was investigated in detail using different flux to reactant molar ratios (1 : 1, 3 : 1, 6 : 1, 10 : 1, and 14 : 1) and different reaction temperatures (300, 500, and 600 °C). The obtained products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance UV-Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), the Brunauer-Emmett-Teller method (BET), and high resolution scanning transmission electron microscopy (HRTEM). Flux-assisted synthesis led to tin niobate particles of platelet morphology with smooth surfaces. The synthesized crystal showed a 2D anisotropic growth along the (600) plane as the flux ratio increased. The particles synthesized with a high reactant to flux ratio (1 : 10 or higher) exhibited slightly improved photocatalytic activity for hydrogen evolution from an aqueous methanol solution under visible radiation (λ > 420 nm). The photo-deposition of platinum and PbO2 was examined to gain a better understanding of electrons and hole migration pathways in these layered materials. The HR-STEM observation revealed that no preferential deposition of these nanoparticles was observed depending on the surface facets of SnNb 2O6. This journal is © the Partner Organisations 2014.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleFlux-assisted synthesis of SnNb2O6 for tuning photocatalytic propertiesen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentCore Labsen
dc.contributor.departmentCatalysis for Energy Conversion (CatEC)en
dc.identifier.journalPhysical Chemistry Chemical Physicsen
kaust.authorAnjum, Dalaver H.en
kaust.authorTakanabe, Kazuhiroen
kaust.authorNoureldine, Dalalen
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