Publication:
Synthesis of visible-light active monoclinic wo3 by thermal oxidation of tungsten powder for photoreduction of cr(vi)
Synthesis of visible-light active monoclinic wo3 by thermal oxidation of tungsten powder for photoreduction of cr(vi)
| cris.author.scopus-author-id | 55566919700 | |
| cris.author.scopus-author-id | 57219217206 | |
| cris.virtual.department | Universiti Malaysia Perlis | |
| cris.virtualsource.department | 7ee83e61-ce06-401c-a1b0-7fbe6c9d68da | |
| dc.contributor.author | Nurulhuda Bashirom | |
| dc.contributor.author | Lee, Qiao Ling | |
| dc.date.accessioned | 2024-09-27T04:20:47Z | |
| dc.date.available | 2024-09-27T04:20:47Z | |
| dc.date.issued | 2020-01-01 | |
| dc.description.abstract | In this paper, visible-light-active monoclinic-WO3 powders were synthesized by thermal oxidation of W powders at 200-1000 °C in air atmosphere. Morphology and crystal structure of annealed W powders were characterized by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD), respectively. Based on the SEM and XRD results, a spherical orthorhombic-W3O8 obtained at 200 °C was transformed into a dendritic monoclinic WO2 + tetragonal WO3 + monoclinic WO3 structures at 400 °C accompanied by a color transition from grey into green powders. At 600 °C, yellow monoclinic WO3 + monoclinic WO2.96 powder was produced that ascribed to oxygen vacancies. Photocatalytic activity of the annealed W powders at 1000 °C demonstrated 70.7% Cr(VI) removal after 150 min attributed to the high photoactivity of monoclinic WO3. Nevertheless, the dendritic monoclinic WO2 + tetragonal WO3 + monoclinic WO3 obtained at 400 °C exhibited the lowest Cr(VI) photoreduction i.e. 45.2% suggesting poor photocatalytic activity of monoclinic WO2 and sluggish electron transport at WO2|WO3 interfaces. | |
| dc.identifier.doi | 10.4028/www.scientific.net/MSF.1010.405 | |
| dc.identifier.isbn | [9783035715828] | |
| dc.identifier.scopus | 2-s2.0-85091715290 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.14170/4518 | |
| dc.language.iso | en | |
| dc.relation.grantno | undefined | |
| dc.relation.ispartof | Materials Science Forum | |
| dc.relation.ispartofseries | Materials Science Forum | |
| dc.relation.issn | 02555476 | |
| dc.subject | Hexavalent chromium | |
| dc.subject | Photoreduction | |
| dc.subject | Thermal oxidation | |
| dc.subject | Tungsten | |
| dc.subject | Tungsten trioxide | |
| dc.title | Synthesis of visible-light active monoclinic wo3 by thermal oxidation of tungsten powder for photoreduction of cr(vi) | |
| dc.type | Book Series | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 410 | |
| oaire.citation.startPage | 405 | |
| oaire.citation.volume | 1010 MSF | |
| oairecerif.affiliation.orgunit | Universiti Malaysia Perlis | |
| oairecerif.affiliation.orgunit | Universiti Malaysia Perlis | |
| oairecerif.author.affiliation | Universiti Malaysia Perlis | |
| oairecerif.author.affiliation | Universiti Malaysia Perlis | |
| person.identifier.orcid | #PLACEHOLDER_PARENT_METADATA_VALUE# | |
| person.identifier.orcid | #PLACEHOLDER_PARENT_METADATA_VALUE# | |
| person.identifier.scopus-author-id | 55566919700 | |
| person.identifier.scopus-author-id | 57219217206 |
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