title: Degradation and Mineralization of Benzohydroxamic Acid by Synthesized Mesoporous La/TiO₂.
abstract: Rare earth element La-doped TiO₂ (La/TiO₂) was synthesized by the sol-gel method. Benzohydroxamic acid was used as the objective pollutant to investigate the photocatalytic activity of La/TiO₂. The physicochemical properties of the prepared materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, specific surface area and porosity, scanning electron microscopy and transmission electron microscopy. As a result, the doping of La could inhibit the crystal growth of TiO₂, increase its specific surface area and expand its response to visible light, thus improving its photocatalytic activity. La/TiO₂ with the doping ratio of 0.75% calcined at 500 °C, showing the highest photocatalytic activity to degrade benzohydroxamic acid under the irradiation of 300 W mercury lamp. About 94.1% of benzohydroxamic acid with the original concentration at 30 mg·L-1was removed after 120 min in a solution of pH 4.4 with an La/TiO₂ amount of 0.5 g·L-1. Furthermore, 88.5% of the total organic carbon was eliminated after 120 min irradiation. In addition, after four recycling runs, La/TiO₂ still kept high photocatalytic activity on the photodegradation of benzohydroxamic acid. The interfacial charge transfer processes were also hypothesized.
authors.affiliation: Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China. lxp9491@163.com.|Post-Doctoral Scientific Research Workstation of Western Mining Co. Ltd., Xining 810001, China. lxp9491@163.com.|Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Ganzhou 341000, China. lxp9491@163.com.
authors.forename: Xianping
authors.initials: X
authors.lastname: Luo
authors.affiliation: Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China. Wangjunyu1025@163.com.|Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Ganzhou 341000, China. Wangjunyu1025@163.com.
authors.forename: Junyu
authors.initials: J
authors.lastname: Wang
authors.affiliation: Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China. cywang@jxust.edu.cn.|Post-Doctoral Scientific Research Workstation of Western Mining Co. Ltd., Xining 810001, China. cywang@jxust.edu.cn.|Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Ganzhou 341000, China. cywang@jxust.edu.cn.
authors.forename: Chunying
authors.initials: C
authors.lastname: Wang
authors.affiliation: Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China. beyond_life@163.com.|Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Ganzhou 341000, China. beyond_life@163.com.
authors.forename: Sipin
authors.initials: S
authors.lastname: Zhu
authors.affiliation: Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China. 13177767724@163.com.|Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Ganzhou 341000, China. 13177767724@163.com.
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Li
authors.affiliation: School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China. 13607974014@126.com.
authors.forename: Xuekun
authors.initials: X
authors.lastname: Tang
authors.affiliation: Post-Doctoral Scientific Research Workstation of Western Mining Co. Ltd., Xining 810001, China. wumin5836@163.com.
authors.forename: Min
authors.initials: M
authors.lastname: Wu
mesh_terms: D002384:Catalysis; D006877:Hydroxamic Acids / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D008027:Light; D008674:Metals, Rare Earth; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D056951:Photoelectron Spectroscopy; D010782:Photolysis; D016062:Porosity; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D006877:Hydroxamic Acids; D008674:Metals, Rare Earth; C009495:titanium dioxide; D007811:Lanthanum; D014025:Titanium; C006696:benzohydroxamic acid
keywords: La/TiO2; benzohydroxamic acid; characterization; mineralization; photocatalytic degradation; rare earth doped