Layered nanostructured ferroelectric perovskite Bi5FeTi3O15 for visible light photodegradation of antibiotics
Hailili, R (Hailili, Reshalaiti); Wang, ZQ (Wang, Zhi-Qiang); Xu, MY (Xu, Meiyue); Wang, YH (Wang, Yuanhao); Gong, XQ (Gong, Xue-Qing); Xu, T (Xu, Tao); Wang, CY (Wang, Chuanyi)
2017
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
Volume5Issue:40Pages:21275-21290
Abstract

Solar photocatalytic degradation of organic pollutants is a promising cheap way for waste water disinfection. There are two weaknesses in the photocatalytic process: inadequate utilization of light energy and fast charge recombination. Effective surface-interface control over morphological tailoring can provide a large surface area, and prevent quick recombination of carriers, resulting in efficiency enhancement. In this work, we focus on enhancing the critical elemental photocatalytic steps via innovation in material chemistry. A diverse series of nanostructured ferroelectric Bi5FeTi3O15 with enhanced charge separation originating from their ferroelectric nature were synthesized by varying the pH value during the hydrothermal synthesis. Their photocatalytic properties can also be tailored to best fit the degradation of hazardous antibiotics (e.g. tetracycline) in aqueous solution, including light absorption in the solar spectrum, charge separation, structure and surface charge for effective mass transport. The photodegradation of tetracycline follows first-order kinetics, and a significantly enhanced photooxidation performance is observed for 3D flower-like Bi5FeTi3O15 with a degradation rate constant of 1.97 x 10(-1) min(-1), much faster than that reported in the literature for Fe-based visible light active photocatalysts towards tetracycline degradation. Density functional theory calculations indicate that the higher electron densities in [Bi3FeTi3O13](2-) layers can favor the transport of photogenerated electrons and holes in alternate layers, promoting a longer charge carrier lifetime from 3.4 ns to 7.1 ns, as revealed by time-resolved photoluminescence spectra. The photodegradation mechanism is supported by theoretical calculation and experimentally identified by free radical and spin trapping experiments, LC-MS, and reduced total organic carbon analysis with approximately 94.88% removal, all of which testify to the complete mineralization of the antibiotics.

DOI10.1039/c7ta06618j
Indexed BySCI
WOS IDWOS:000413189100023
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5279
Collection中国科学院特殊环境功能材料与器件重点试验室
Affiliation1.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.East China Univ Sci & Technol, Sch Chem & Mol Engn, Ctr Computat Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China
4.East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China
5.Northern Illinois Univ, Dept Chem & Biochem, De Kalb, IL 60115 USA
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GB/T 7714
Hailili, R ,Wang, ZQ ,Xu, MY ,et al. Layered nanostructured ferroelectric perovskite Bi5FeTi3O15 for visible light photodegradation of antibiotics[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(40):21275-21290.
APA Hailili, R .,Wang, ZQ .,Xu, MY .,Wang, YH .,Gong, XQ .,...&Wang, CY .(2017).Layered nanostructured ferroelectric perovskite Bi5FeTi3O15 for visible light photodegradation of antibiotics.JOURNAL OF MATERIALS CHEMISTRY A,5(40),21275-21290.
MLA Hailili, R ,et al."Layered nanostructured ferroelectric perovskite Bi5FeTi3O15 for visible light photodegradation of antibiotics".JOURNAL OF MATERIALS CHEMISTRY A 5.40(2017):21275-21290.
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