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pH effects of the arsenite photocatalytic oxidation reaction on different anatase TiO2 facets.
Chemosphere. 2019 Jun; 225:434-442.C

Abstract

TiO2 is one of the most cheap materials which can both adsorb arsenic and oxidize arsenite [As(III)] to arsenate [As(V)]. In this study, anatase TiO2 crystals with different main facets such as {101}, {001} and {100} are synthesized and used to investigate arsenic adsorption kinetics, adsorption isotherms, photocatalytic oxidation (PCO) process and the pH effects. The adsorption kinetics of arsenic on TiO2 crystals can be described by the pseudo second-order kinetic model. For the adsorption isotherms, the Langmuir model is better than the Freundlich model for arsenic on these TiO2 crystals. For the PCO process, the rate of As(III) oxidation can be denoted by the pseudo first-order kinetic model. It should be noted that at neutral condition the adsorption and PCO rates of the three kinds of TiO2 crystals follow the order of {101} > {001} > {100}. The pH effect is above all important for both the arsenic adsorption and its PCO. The highest PCO speed appears at high pH values such as at pH 11 or 12.

Authors+Show Affiliations

School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China. Electronic address: weizg2003@126.com.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.College of Chemistry, Liaoning University, Shenyang 110036, PR China.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30889407

Citation

Wei, Zhigang, et al. "PH Effects of the Arsenite Photocatalytic Oxidation Reaction On Different Anatase TiO2 Facets." Chemosphere, vol. 225, 2019, pp. 434-442.
Wei Z, Fang Y, Wang Z, et al. PH effects of the arsenite photocatalytic oxidation reaction on different anatase TiO2 facets. Chemosphere. 2019;225:434-442.
Wei, Z., Fang, Y., Wang, Z., Liu, Y., Wu, Y., Liang, K., Yan, J., Pan, Z., & Hu, G. (2019). PH effects of the arsenite photocatalytic oxidation reaction on different anatase TiO2 facets. Chemosphere, 225, 434-442. https://doi.org/10.1016/j.chemosphere.2019.03.017
Wei Z, et al. PH Effects of the Arsenite Photocatalytic Oxidation Reaction On Different Anatase TiO2 Facets. Chemosphere. 2019;225:434-442. PubMed PMID: 30889407.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - pH effects of the arsenite photocatalytic oxidation reaction on different anatase TiO2 facets. AU - Wei,Zhigang, AU - Fang,Yangfei, AU - Wang,Zhenrui, AU - Liu,Yue, AU - Wu,Yang, AU - Liang,Kai, AU - Yan,Jiahong, AU - Pan,Zhanchang, AU - Hu,Guanghui, Y1 - 2019/03/07/ PY - 2018/11/07/received PY - 2019/02/26/revised PY - 2019/03/04/accepted PY - 2019/3/20/pubmed PY - 2019/6/14/medline PY - 2019/3/20/entrez KW - Adsorption KW - Arsenate KW - Arsenite KW - Oxidation KW - TiO(2) SP - 434 EP - 442 JF - Chemosphere JO - Chemosphere VL - 225 N2 - TiO2 is one of the most cheap materials which can both adsorb arsenic and oxidize arsenite [As(III)] to arsenate [As(V)]. In this study, anatase TiO2 crystals with different main facets such as {101}, {001} and {100} are synthesized and used to investigate arsenic adsorption kinetics, adsorption isotherms, photocatalytic oxidation (PCO) process and the pH effects. The adsorption kinetics of arsenic on TiO2 crystals can be described by the pseudo second-order kinetic model. For the adsorption isotherms, the Langmuir model is better than the Freundlich model for arsenic on these TiO2 crystals. For the PCO process, the rate of As(III) oxidation can be denoted by the pseudo first-order kinetic model. It should be noted that at neutral condition the adsorption and PCO rates of the three kinds of TiO2 crystals follow the order of {101} > {001} > {100}. The pH effect is above all important for both the arsenic adsorption and its PCO. The highest PCO speed appears at high pH values such as at pH 11 or 12. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/30889407/pH_effects_of_the_arsenite_photocatalytic_oxidation_reaction_on_different_anatase_TiO2_facets_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)30450-3 DB - PRIME DP - Unbound Medicine ER -