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dc.contributor.authorGe, Xiao
dc.contributor.authorLiu, Juntao
dc.contributor.authorSong, Xiangyang
dc.contributor.authorWang, Guozhong
dc.contributor.authorZhang, Haimin
dc.contributor.authorZhang, Yunxia
dc.contributor.authorZhao, Huijun
dc.date.accessioned2017-10-25T01:44:14Z
dc.date.available2017-10-25T01:44:14Z
dc.date.issued2016
dc.identifier.issn1385-8947
dc.identifier.doi10.1016/j.cej.2016.05.005
dc.identifier.urihttp://hdl.handle.net/10072/100408
dc.description.abstractThe hierarchical flower-like iron containing γ-MnO2 hollow microspheres assembled by ultrathin nanosheets have been successfully fabricated via a facile one-step co-precipitation route in the absence of additional templates or surfactants. Structural characterization show that iron element is uniformly incorporated into γ-MnO2 framework, and no segregated iron oxide appears. The resulting iron containing MnO2 hollow microspheres exhibit a noticeable enhanced performance for As(III) removal compared to that of the undoped counterparts, accompanied by 102.84 mg/g of the saturated removal capacity towards As(III). The excellent performance for the arsenic removal may be attributed to the unique structural characteristics of highly accessible surface and fully exposed active sites inherited from the hierarchical iron containing γ-MnO2 samples. The co-existence of oxidation and adsorption is another key factor for the improvement of As(III) removal efficiency, in which manganese dioxide is mainly responsible for oxidizing As(III) to As(V) and ferrous species may serve to the adsorption of the generated As(V), as evidenced by X-ray photoelectron spectroscopy (XPS) analysis. Importantly, the composites exhibit an excellent regenerative ability over three cycles without a significant decrease in its removal efficiency towards As(III). Furthermore, the relatively large micrometer-scale particles can be easily separated by filtration, accompanied by fewer secondary contaminants risks than nanoparticles. Therefore, the fabricated hierarchical Fe-containing γ-MnO2 hollow spheres in the present study will be an excellent candidate for the arsenic transformation and removal from the contaminated water based on the synergistic effects of effective oxidizing and adsorptive performance, good regeneration together with the convenient separation.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherElsevier
dc.relation.ispartofpagefrom139
dc.relation.ispartofpageto148
dc.relation.ispartofjournalChemical Engineering Journal
dc.relation.ispartofvolume301
dc.subject.fieldofresearchChemical engineering
dc.subject.fieldofresearchChemical engineering not elsewhere classified
dc.subject.fieldofresearchCivil engineering
dc.subject.fieldofresearchEnvironmental engineering
dc.subject.fieldofresearchcode4004
dc.subject.fieldofresearchcode400499
dc.subject.fieldofresearchcode4005
dc.subject.fieldofresearchcode4011
dc.titleHierarchical iron containing c-MnO2 hollow microspheres: A facile one-step synthesis and effective removal of As(III) via oxidation and adsorption
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorZhao, Huijun
gro.griffith.authorZhang, Haimin


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