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Visible-light-induced photocatalytic reduction of Cr(VI) with coupled Bi2O3/TiO2 photocatalyst and the synergistic bisphenol A oxidation.
Environ Sci Pollut Res Int. 2013 Apr; 20(4):2435-47.ES

Abstract

Coupled Bi2O3/TiO2 photocatalysts were fabricated by sol-gel and hydrothermal methods and characterized using various spectroscopy techniques. Photocatalytic reduction of Cr(VI) in aqueous solution, together with the synergistic effect of photodegradation of bisphenol A (BPA), was investigated using these coupled Bi2O3/TiO2 under visible-light irradiation. Coupling of Bi2O3 inhibited the phase transformation from anatase to rutile and extended absorption region to visible light. Bi ions did not enter TiO2 lattice and were more likely to bond with oxygen atoms to form Bi2O3 on the surface of TiO2. Photovoltage signals in visible range revealed the effective interfacial charge transfer between Bi2O3 and TiO2. Two percent Bi2O3/TiO2 exhibited the highest photocatalytic activity of visible-light-induced reduction of Cr(VI). The addition of BPA effectively increased the photocatalytic reduction of Cr(VI). Simultaneously, the presence of Cr(VI) promoted the degradation of BPA, which was demonstrated by the investigation of TOC removal yield and generated intermediates. A possible mechanism of photocatalytic reduction of Cr(VI) and degradation of BPA in Bi2O3/TiO2 system was proposed. The synergistic effect, observed between reduction of Cr(VI) and degradation of BPA, provides beneficial method for environmental remediation and purification of the complex wastewater.

Authors+Show Affiliations

Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454003, People's Republic of China. yangjuanhpu@yahoo.comNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22935862

Citation

Yang, Juan, et al. "Visible-light-induced Photocatalytic Reduction of Cr(VI) With Coupled Bi2O3/TiO2 Photocatalyst and the Synergistic Bisphenol a Oxidation." Environmental Science and Pollution Research International, vol. 20, no. 4, 2013, pp. 2435-47.
Yang J, Dai J, Li J. Visible-light-induced photocatalytic reduction of Cr(VI) with coupled Bi2O3/TiO2 photocatalyst and the synergistic bisphenol A oxidation. Environ Sci Pollut Res Int. 2013;20(4):2435-47.
Yang, J., Dai, J., & Li, J. (2013). Visible-light-induced photocatalytic reduction of Cr(VI) with coupled Bi2O3/TiO2 photocatalyst and the synergistic bisphenol A oxidation. Environmental Science and Pollution Research International, 20(4), 2435-47. https://doi.org/10.1007/s11356-012-1131-6
Yang J, Dai J, Li J. Visible-light-induced Photocatalytic Reduction of Cr(VI) With Coupled Bi2O3/TiO2 Photocatalyst and the Synergistic Bisphenol a Oxidation. Environ Sci Pollut Res Int. 2013;20(4):2435-47. PubMed PMID: 22935862.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Visible-light-induced photocatalytic reduction of Cr(VI) with coupled Bi2O3/TiO2 photocatalyst and the synergistic bisphenol A oxidation. AU - Yang,Juan, AU - Dai,Jun, AU - Li,Jiantong, Y1 - 2012/08/31/ PY - 2012/07/08/received PY - 2012/08/17/accepted PY - 2012/9/1/entrez PY - 2012/9/1/pubmed PY - 2013/5/15/medline SP - 2435 EP - 47 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 20 IS - 4 N2 - Coupled Bi2O3/TiO2 photocatalysts were fabricated by sol-gel and hydrothermal methods and characterized using various spectroscopy techniques. Photocatalytic reduction of Cr(VI) in aqueous solution, together with the synergistic effect of photodegradation of bisphenol A (BPA), was investigated using these coupled Bi2O3/TiO2 under visible-light irradiation. Coupling of Bi2O3 inhibited the phase transformation from anatase to rutile and extended absorption region to visible light. Bi ions did not enter TiO2 lattice and were more likely to bond with oxygen atoms to form Bi2O3 on the surface of TiO2. Photovoltage signals in visible range revealed the effective interfacial charge transfer between Bi2O3 and TiO2. Two percent Bi2O3/TiO2 exhibited the highest photocatalytic activity of visible-light-induced reduction of Cr(VI). The addition of BPA effectively increased the photocatalytic reduction of Cr(VI). Simultaneously, the presence of Cr(VI) promoted the degradation of BPA, which was demonstrated by the investigation of TOC removal yield and generated intermediates. A possible mechanism of photocatalytic reduction of Cr(VI) and degradation of BPA in Bi2O3/TiO2 system was proposed. The synergistic effect, observed between reduction of Cr(VI) and degradation of BPA, provides beneficial method for environmental remediation and purification of the complex wastewater. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/22935862/Visible_light_induced_photocatalytic_reduction_of_Cr_VI__with_coupled_Bi2O3/TiO2_photocatalyst_and_the_synergistic_bisphenol_A_oxidation_ L2 - https://dx.doi.org/10.1007/s11356-012-1131-6 DB - PRIME DP - Unbound Medicine ER -