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Article: Ionic liquid-employed synthesis of Bi2E3 (E = S, Se, and Te) hierarchitectures: The case of Bi2S3 with superior visible-light-driven Cr(VI) photoreduction capacity

TitleIonic liquid-employed synthesis of Bi2E3 (E = S, Se, and Te) hierarchitectures: The case of Bi2S3 with superior visible-light-driven Cr(VI) photoreduction capacity
Authors
KeywordsChlorination
Chromium compounds
LightLiquids
Nanostructures
Wastewater treatment
Issue Date2017
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej
Citation
Chemical Engineering Journal, 2017, v. 327, p. 371-386 How to Cite?
AbstractA general ionic-assisted microwave-ultrasonic combined synthetic strategy was developed to fabricate Bi2E3 (E = S, Se, and Te) hierarchitectures. To understand the crystal phase transformation and morphological evolution of Bi2S3 hierarchical nanostructures, the fabrication of Bi2S3 hierarchitectures was investigated by varying sulfidation time and chlorination time. A topotactic transformation from BiOCl microsphere to Bi2S3 hierarchitectures was proposed. It was found that the structure, size, and morphology of Bi2S3 hierarchitectures could be delicately engineered by varying chlorination time, alkyl chain length, and concentration of ionic liquid. Moreover, the as-prepared Bi2S3 hierarchitectures displayed superior capacity of Cr(VI) photoreduction to P25 and irregular Bi2S3 nanostructures under visible light irradiation. Effects of morphology, pH value of reaction system, Cr(VI) concentration, and catalyst dosage on the Cr(VI) photoreduction capacity of Bi2S3 hierarchitectures were also discussed. The enhancement of photoreduction capacity is not only attributed to the intrinsic good electron transfer ability of Bi2S3, but also to synergetic effects of special architectures, wide photoresponse range, high light photoadsorption, high BET surface area and good electron-hole separation performance. The systematic condition experiments and Cr(VI) photoreduction in electroplating and tannery wastewater experiments further demonstrated that the hierarchical Bi2S3 nanospheres can be used in the actual Cr(VI)-containing wastewater treatment.
Persistent Identifierhttp://hdl.handle.net/10722/272686
ISSN
2019 Impact Factor: 10.652
2015 SCImago Journal Rankings: 1.743
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, R-
dc.contributor.authorCheng, G-
dc.contributor.authorDai, Z-
dc.contributor.authorDing, J-
dc.contributor.authorLiu, Y-
dc.contributor.authorChen, R-
dc.date.accessioned2019-08-06T09:14:38Z-
dc.date.available2019-08-06T09:14:38Z-
dc.date.issued2017-
dc.identifier.citationChemical Engineering Journal, 2017, v. 327, p. 371-386-
dc.identifier.issn1385-8947-
dc.identifier.urihttp://hdl.handle.net/10722/272686-
dc.description.abstractA general ionic-assisted microwave-ultrasonic combined synthetic strategy was developed to fabricate Bi2E3 (E = S, Se, and Te) hierarchitectures. To understand the crystal phase transformation and morphological evolution of Bi2S3 hierarchical nanostructures, the fabrication of Bi2S3 hierarchitectures was investigated by varying sulfidation time and chlorination time. A topotactic transformation from BiOCl microsphere to Bi2S3 hierarchitectures was proposed. It was found that the structure, size, and morphology of Bi2S3 hierarchitectures could be delicately engineered by varying chlorination time, alkyl chain length, and concentration of ionic liquid. Moreover, the as-prepared Bi2S3 hierarchitectures displayed superior capacity of Cr(VI) photoreduction to P25 and irregular Bi2S3 nanostructures under visible light irradiation. Effects of morphology, pH value of reaction system, Cr(VI) concentration, and catalyst dosage on the Cr(VI) photoreduction capacity of Bi2S3 hierarchitectures were also discussed. The enhancement of photoreduction capacity is not only attributed to the intrinsic good electron transfer ability of Bi2S3, but also to synergetic effects of special architectures, wide photoresponse range, high light photoadsorption, high BET surface area and good electron-hole separation performance. The systematic condition experiments and Cr(VI) photoreduction in electroplating and tannery wastewater experiments further demonstrated that the hierarchical Bi2S3 nanospheres can be used in the actual Cr(VI)-containing wastewater treatment.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej-
dc.relation.ispartofChemical Engineering Journal-
dc.subjectChlorination-
dc.subjectChromium compounds-
dc.subjectLightLiquids-
dc.subjectNanostructures-
dc.subjectWastewater treatment-
dc.titleIonic liquid-employed synthesis of Bi2E3 (E = S, Se, and Te) hierarchitectures: The case of Bi2S3 with superior visible-light-driven Cr(VI) photoreduction capacity-
dc.typeArticle-
dc.identifier.emailWang, R: u3002771@connect.hku.hk-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.cej.2017.06.119-
dc.identifier.scopuseid_2-s2.0-85021280438-
dc.identifier.hkuros300814-
dc.identifier.volume327-
dc.identifier.spage371-
dc.identifier.epage386-
dc.identifier.isiWOS:000408663800040-
dc.publisher.placeNetherlands-
dc.identifier.issnl1385-8947-

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