Preparation and application of BiOBr-Bi2S3 heterojunctions for efficient photocatalytic removal of Cr(VI)
Recently, the photocatalytic reduction of Cr(VI) has been extensively studied. Herein, we successfully prepared the BiOBr-Bi2S3 heterojunctions with high photocatalytic Cr(VI) reduction performance using an ion exchange method. The optimal BiOBr-Bi2S3 heterojunction (prepared with BiOBr, pH of 6.0,...
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| Veröffentlicht in: | Journal of hazardous materials 2021-04, Vol.407, p.124394-124394, Article 124394 |
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| creator | Long, Zeqing Zhang, Guangming Du, Hongbiao Zhu, Jia Li, Jinwei |
| description | Recently, the photocatalytic reduction of Cr(VI) has been extensively studied. Herein, we successfully prepared the BiOBr-Bi2S3 heterojunctions with high photocatalytic Cr(VI) reduction performance using an ion exchange method. The optimal BiOBr-Bi2S3 heterojunction (prepared with BiOBr, pH of 6.0, 2 mmol Na2S2O3·5H2O,) achieved 100% removal of Cr(VI) within 12 min. The performance of photo-reduced Cr(VI) was about 28.9 and 184.6 times higher than that of pure Bi2S3 and BiOBr, respectively. Besides, BiOBr-Bi2S3 heterojunctions had a good adsorption efficiency for Cr(III), suggesting that they could be applied as bifunctional photocatalyst. The formation process and photoelectric properties of the BiOBr-Bi2S3 heterojunctions were revealed by a series of characterizations. In conclusion, this work reported the synergistic effect of adsorption and photocatalysis of the BiOBr-Bi2S3 heterojunctions for Cr removal for the first time, suggesting that the BiOBr-Bi2S3 heterojunctions could act as a novel photocatalytic adsorbent to treat the Cr(VI)-containing wastewater.
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•BiOBr-Bi2S3 heterojunctions were prepared using an ion-exchange method.•B-2 exhibited the best photoreduction performance for Cr (VI).•Fast charge separation enhances the heterojunction photocatalytic performance.•BiOBr-Bi2S3 heterojunctions can be used as novel photocatalytic adsorbents.•The photocatalytic mechanism of Cr (VI) removal by heterojunctions was elucidated. |
| doi_str_mv | 10.1016/j.jhazmat.2020.124394 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_2461392537</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0304389420323840</els_id><sourcerecordid>2461392537</sourcerecordid><originalsourceid>FETCH-LOGICAL-c342t-3160d3768c8df23695c3dbed9ad0cb531b4578ec4ef3405196f6486941b893223</originalsourceid><addsrcrecordid>eNqFkEGL2zAQhUXpQtN0f8KCj9mDs5JGlu1T2YRtGwiksG2vQpFHRMaxXEkJpL--Nt77noaZee_B-wh5YHTNKJNP7bo96X9nndac8vHGBdTiA1mwqoQcAORHsqBARQ5VLT6RzzG2lFJWFmJB3M-Agw46Od9num8yPQydM_PubbZxh03IN46_QnbChMG3l95M35hZHzK01hmHfcqGk09-NOrulpzJAp79VXdTxjas_uwev5A7q7uI929zSX5_e_m1_ZHvD9932-d9bkDwlAOTtIFSVqZqLAdZFwaaIza1bqg5FsCOoigrNAItCFqwWlopKlkLdqxq4ByWZDXnDsH_vWBM6uyiwa7TPfpLVFxIBjUvoBylxSw1wccY0KohuLMON8WomtCqVr2hVRNaNaMdfV9nH449rg6DihMDg40LaJJqvHsn4T-6A4SZ</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2461392537</pqid></control><display><type>article</type><title>Preparation and application of BiOBr-Bi2S3 heterojunctions for efficient photocatalytic removal of Cr(VI)</title><source>Elsevier ScienceDirect Journals</source><creator>Long, Zeqing ; Zhang, Guangming ; Du, Hongbiao ; Zhu, Jia ; Li, Jinwei</creator><creatorcontrib>Long, Zeqing ; Zhang, Guangming ; Du, Hongbiao ; Zhu, Jia ; Li, Jinwei</creatorcontrib><description>Recently, the photocatalytic reduction of Cr(VI) has been extensively studied. Herein, we successfully prepared the BiOBr-Bi2S3 heterojunctions with high photocatalytic Cr(VI) reduction performance using an ion exchange method. The optimal BiOBr-Bi2S3 heterojunction (prepared with BiOBr, pH of 6.0, 2 mmol Na2S2O3·5H2O,) achieved 100% removal of Cr(VI) within 12 min. The performance of photo-reduced Cr(VI) was about 28.9 and 184.6 times higher than that of pure Bi2S3 and BiOBr, respectively. Besides, BiOBr-Bi2S3 heterojunctions had a good adsorption efficiency for Cr(III), suggesting that they could be applied as bifunctional photocatalyst. The formation process and photoelectric properties of the BiOBr-Bi2S3 heterojunctions were revealed by a series of characterizations. In conclusion, this work reported the synergistic effect of adsorption and photocatalysis of the BiOBr-Bi2S3 heterojunctions for Cr removal for the first time, suggesting that the BiOBr-Bi2S3 heterojunctions could act as a novel photocatalytic adsorbent to treat the Cr(VI)-containing wastewater.
[Display omitted]
•BiOBr-Bi2S3 heterojunctions were prepared using an ion-exchange method.•B-2 exhibited the best photoreduction performance for Cr (VI).•Fast charge separation enhances the heterojunction photocatalytic performance.•BiOBr-Bi2S3 heterojunctions can be used as novel photocatalytic adsorbents.•The photocatalytic mechanism of Cr (VI) removal by heterojunctions was elucidated.</description><identifier>ISSN: 0304-3894</identifier><identifier>EISSN: 1873-3336</identifier><identifier>DOI: 10.1016/j.jhazmat.2020.124394</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Bi2S3 ; BiOBr ; Environmental purification ; Hazardous substance ; Heterojunction ; Hexavalent chromium ; Photocatalyst</subject><ispartof>Journal of hazardous materials, 2021-04, Vol.407, p.124394-124394, Article 124394</ispartof><rights>2020 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c342t-3160d3768c8df23695c3dbed9ad0cb531b4578ec4ef3405196f6486941b893223</citedby><cites>FETCH-LOGICAL-c342t-3160d3768c8df23695c3dbed9ad0cb531b4578ec4ef3405196f6486941b893223</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0304389420323840$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Long, Zeqing</creatorcontrib><creatorcontrib>Zhang, Guangming</creatorcontrib><creatorcontrib>Du, Hongbiao</creatorcontrib><creatorcontrib>Zhu, Jia</creatorcontrib><creatorcontrib>Li, Jinwei</creatorcontrib><title>Preparation and application of BiOBr-Bi2S3 heterojunctions for efficient photocatalytic removal of Cr(VI)</title><title>Journal of hazardous materials</title><description>Recently, the photocatalytic reduction of Cr(VI) has been extensively studied. Herein, we successfully prepared the BiOBr-Bi2S3 heterojunctions with high photocatalytic Cr(VI) reduction performance using an ion exchange method. The optimal BiOBr-Bi2S3 heterojunction (prepared with BiOBr, pH of 6.0, 2 mmol Na2S2O3·5H2O,) achieved 100% removal of Cr(VI) within 12 min. The performance of photo-reduced Cr(VI) was about 28.9 and 184.6 times higher than that of pure Bi2S3 and BiOBr, respectively. Besides, BiOBr-Bi2S3 heterojunctions had a good adsorption efficiency for Cr(III), suggesting that they could be applied as bifunctional photocatalyst. The formation process and photoelectric properties of the BiOBr-Bi2S3 heterojunctions were revealed by a series of characterizations. In conclusion, this work reported the synergistic effect of adsorption and photocatalysis of the BiOBr-Bi2S3 heterojunctions for Cr removal for the first time, suggesting that the BiOBr-Bi2S3 heterojunctions could act as a novel photocatalytic adsorbent to treat the Cr(VI)-containing wastewater.
[Display omitted]
•BiOBr-Bi2S3 heterojunctions were prepared using an ion-exchange method.•B-2 exhibited the best photoreduction performance for Cr (VI).•Fast charge separation enhances the heterojunction photocatalytic performance.•BiOBr-Bi2S3 heterojunctions can be used as novel photocatalytic adsorbents.•The photocatalytic mechanism of Cr (VI) removal by heterojunctions was elucidated.</description><subject>Bi2S3</subject><subject>BiOBr</subject><subject>Environmental purification</subject><subject>Hazardous substance</subject><subject>Heterojunction</subject><subject>Hexavalent chromium</subject><subject>Photocatalyst</subject><issn>0304-3894</issn><issn>1873-3336</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFkEGL2zAQhUXpQtN0f8KCj9mDs5JGlu1T2YRtGwiksG2vQpFHRMaxXEkJpL--Nt77noaZee_B-wh5YHTNKJNP7bo96X9nndac8vHGBdTiA1mwqoQcAORHsqBARQ5VLT6RzzG2lFJWFmJB3M-Agw46Od9num8yPQydM_PubbZxh03IN46_QnbChMG3l95M35hZHzK01hmHfcqGk09-NOrulpzJAp79VXdTxjas_uwev5A7q7uI929zSX5_e_m1_ZHvD9932-d9bkDwlAOTtIFSVqZqLAdZFwaaIza1bqg5FsCOoigrNAItCFqwWlopKlkLdqxq4ByWZDXnDsH_vWBM6uyiwa7TPfpLVFxIBjUvoBylxSw1wccY0KohuLMON8WomtCqVr2hVRNaNaMdfV9nH449rg6DihMDg40LaJJqvHsn4T-6A4SZ</recordid><startdate>20210405</startdate><enddate>20210405</enddate><creator>Long, Zeqing</creator><creator>Zhang, Guangming</creator><creator>Du, Hongbiao</creator><creator>Zhu, Jia</creator><creator>Li, Jinwei</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20210405</creationdate><title>Preparation and application of BiOBr-Bi2S3 heterojunctions for efficient photocatalytic removal of Cr(VI)</title><author>Long, Zeqing ; Zhang, Guangming ; Du, Hongbiao ; Zhu, Jia ; Li, Jinwei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c342t-3160d3768c8df23695c3dbed9ad0cb531b4578ec4ef3405196f6486941b893223</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Bi2S3</topic><topic>BiOBr</topic><topic>Environmental purification</topic><topic>Hazardous substance</topic><topic>Heterojunction</topic><topic>Hexavalent chromium</topic><topic>Photocatalyst</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Long, Zeqing</creatorcontrib><creatorcontrib>Zhang, Guangming</creatorcontrib><creatorcontrib>Du, Hongbiao</creatorcontrib><creatorcontrib>Zhu, Jia</creatorcontrib><creatorcontrib>Li, Jinwei</creatorcontrib><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of hazardous materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Long, Zeqing</au><au>Zhang, Guangming</au><au>Du, Hongbiao</au><au>Zhu, Jia</au><au>Li, Jinwei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation and application of BiOBr-Bi2S3 heterojunctions for efficient photocatalytic removal of Cr(VI)</atitle><jtitle>Journal of hazardous materials</jtitle><date>2021-04-05</date><risdate>2021</risdate><volume>407</volume><spage>124394</spage><epage>124394</epage><pages>124394-124394</pages><artnum>124394</artnum><issn>0304-3894</issn><eissn>1873-3336</eissn><abstract>Recently, the photocatalytic reduction of Cr(VI) has been extensively studied. Herein, we successfully prepared the BiOBr-Bi2S3 heterojunctions with high photocatalytic Cr(VI) reduction performance using an ion exchange method. The optimal BiOBr-Bi2S3 heterojunction (prepared with BiOBr, pH of 6.0, 2 mmol Na2S2O3·5H2O,) achieved 100% removal of Cr(VI) within 12 min. The performance of photo-reduced Cr(VI) was about 28.9 and 184.6 times higher than that of pure Bi2S3 and BiOBr, respectively. Besides, BiOBr-Bi2S3 heterojunctions had a good adsorption efficiency for Cr(III), suggesting that they could be applied as bifunctional photocatalyst. The formation process and photoelectric properties of the BiOBr-Bi2S3 heterojunctions were revealed by a series of characterizations. In conclusion, this work reported the synergistic effect of adsorption and photocatalysis of the BiOBr-Bi2S3 heterojunctions for Cr removal for the first time, suggesting that the BiOBr-Bi2S3 heterojunctions could act as a novel photocatalytic adsorbent to treat the Cr(VI)-containing wastewater.
[Display omitted]
•BiOBr-Bi2S3 heterojunctions were prepared using an ion-exchange method.•B-2 exhibited the best photoreduction performance for Cr (VI).•Fast charge separation enhances the heterojunction photocatalytic performance.•BiOBr-Bi2S3 heterojunctions can be used as novel photocatalytic adsorbents.•The photocatalytic mechanism of Cr (VI) removal by heterojunctions was elucidated.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.jhazmat.2020.124394</doi><tpages>1</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Bi2S3 BiOBr Environmental purification Hazardous substance Heterojunction Hexavalent chromium Photocatalyst |
| title | Preparation and application of BiOBr-Bi2S3 heterojunctions for efficient photocatalytic removal of Cr(VI) |
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