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dc.contributor.authorRao, Xuehui
dc.contributor.authorSu, Xintai
dc.contributor.authorYang, Chao
dc.contributor.authorWang, Jide
dc.contributor.authorZhen, Xinping
dc.contributor.authorLing, Daishun
dc.date.accessioned2018-01-03T02:42:25Z
dc.date.available2018-01-03T02:42:25Z
dc.date.issued2013
dc.identifier.issn1466-8033
dc.identifier.doi10.1039/c3ce40430g
dc.identifier.urihttp://hdl.handle.net/10072/172107
dc.description.abstractAmerican football-shaped, angular American football-shaped and cubic α-Fe2O3 micro-crystals with different gas-sensing properties have been achieved by an in situ pH-dependent hydrothermal synthesis using β-FeOOH nanospindles as the sacrificing template. XRD, SEM and TEM have been employed to characterize the products. It was found that the morphology and phase evolution occurred in the hydrothermal process. With the increase of the pH value of the hydrothermal system, the morphology evolves from spindle to American football, angular American football and cube, whereas the crystal sizes decrease from 1–1.2 mm to 140 nm. The effect of the reaction time on the phase and morphology of the final products has been studied and a possible dissolution–recrystallization growth mechanism is proposed. Furthermore, the gas sensing properties of the prepared α-Fe2O3 crystals were investigated for a series of organic vapors at different operation temperatures and vapor concentrations, demonstrating that their gas sensing behavior was influenced by the different morphologies and that the as-prepared α-Fe2O3 polyhedral crystals exhibit excellent gas sensing selectivity to acetone vapor. The experimental results revealed that the gas-sensing performance of the α-Fe2O3 crystals is closely related to the morphology of the samples.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.relation.ispartofpagefrom7250
dc.relation.ispartofpageto7256
dc.relation.ispartofissue36
dc.relation.ispartofjournalCrystEngComm
dc.relation.ispartofvolume15
dc.subject.fieldofresearchPhysical Chemistry not elsewhere classified
dc.subject.fieldofresearchInorganic Chemistry
dc.subject.fieldofresearchPhysical Chemistry (incl. Structural)
dc.subject.fieldofresearchMaterials Engineering
dc.subject.fieldofresearchcode030699
dc.subject.fieldofresearchcode0302
dc.subject.fieldofresearchcode0306
dc.subject.fieldofresearchcode0912
dc.titleFrom spindle-like β-FeOOH nanoparticles to α-Fe2O3 polyhedral crystals: Shape evolution, growth mechanism and gas sensing property
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorSu, Xintai


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