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dc.contributor.authorWu, Xuelian
dc.contributor.authorNg, Yun Hau
dc.contributor.authorWang, Liang
dc.contributor.authorDu, Yi
dc.contributor.authorDou, Shi Xue
dc.contributor.authorAmal, Rose
dc.contributor.authorScott, Jason
dc.description.abstractBismuth oxybromide (BiOBr) has emerged as a potential visible-light-driven photocatalyst with relatively high photocatalytic activity although modifications are still necessary to further promote its photocatalytic performance. Here, a facile chemical precipitation process was used to synthesize tetragonal BiOBr with a predominance of either {001} or {010} exposed crystal facets. Scanning electron microscopy revealed that BiOBr particles dominated by the {010} facet possessed a large plate-like morphology while the {001}-dominated BiOBr comprised smaller, more irregular particles. Ultraviolet-visible diffuse reflectance spectra and Mott–Schottky analysis highlighted a difference in electronic band structure of the two materials; BiOBr-010 possessed a valence band potential and a band-gap of 2.71 and 2.95 eV versus normal hydrogen electrode (NHE), respectively, while BOBr-001 exhibited values of 2.63 and 3.15 eV versus NHE, respectively. BiOBr-010 displayed a better photo-oxidative capability than BOBr-001 for both water oxidation and formic acid degradation (aqueous phase). The higher photo-oxidative capability of BiOBr-010 was attributed to the suppression of photo-induced electron/hole recombination. Additionally, the improved charge transfer efficiency and reduced charge transfer resistance in BiOBr-010 was revealed to be beneficial for enhancing photoelectrochemical (PEC) performance. The findings account for the better photo-oxidative activity and higher current density of BiOBr-010 despite its smaller specific surface area and illustrate the use of crystal facet engineering to promote photocatalytic performance.en_US
dc.relation.ispartofjournalJournal of Materials Chemistry Aen_US
dc.subject.fieldofresearchMacromolecular and Materials Chemistryen_US
dc.subject.fieldofresearchMaterials Engineeringen_US
dc.subject.fieldofresearchInterdisciplinary Engineeringen_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsPhysical Sciencesen_US
dc.subject.keywordsChemistry, Physicalen_US
dc.subject.keywordsEnergy & Fuelsen_US
dc.titleImproving the photo-oxidative capability of BiOBr via crystal facet engineeringen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dcterms.bibliographicCitationWu, X; Ng, YH; Wang, L; Du, Y; Dou, SX; Amal, R; Scott, J, Improving the photo-oxidative capability of BiOBr via crystal facet engineering, Journal of Materials Chemistry A, 2017, 5 (17), pp. 8117-8124en_US
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gro.griffith.authorWang, Liang

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