关键词: 静电纺丝技术, 铕掺杂, 二氧化钛纤维, 光催化

Abstract: In this paper, polyvinyl pyrrolidone(PVP), N,N-dimethyl formamide(DMF), glacial acetic acid, absolute ethyl alcohol, tetrabutyl titanate and europium nitrate were used as raw materials to prepare titanium dioxide fibers with different doping concentrations by electrospinning. The morphology and composition of the titanium dioxide fibers were investigated using scanning electron microscopy(SEM)and X-ray powder diffraction(XRD). The diameter of the nanofibers was 300—400 nm before calcination, and became 200-300 nm after calcination. They were indexed to anatase phase. The acid red 3R solution was adopted as the- DOI:10.3969/j.issn.1000-1565.2020.03.005静电纺丝制备铕掺杂二氧化钛纳米纤维及其光催化性能 刘双安¹,单一洋¹,唐浩然¹,李孟¹,陈嘉信²,袁小先¹(1. 河北大学 物理科学与技术学院,河北省光电信息材料重点实验室,新能源光电器件国家地方联合工程实验室,河北 保定 071002;2.河北大学 质量技术监督学院,河北 保定 071002)摘 要:采用静电纺丝法,以聚乙烯吡咯烷酮(PVP)、N,N-二甲基甲酰胺(DMF)、冰乙酸、无水乙醇、硝酸铕和钛酸四丁酯为原料,制备不同浓度铕掺杂的二氧化钛纳米纤维,用扫描电子显微镜(SEM)、X线粉末衍射仪(XRD)来表征二氧化钛纳米纤维的形貌、组成和晶型.结果显示二氧化钛纳米纤维煅烧之前直径为300~400 nm,煅烧后直径为200~300 nm,呈锐钛矿型. 以酸性红3R染料作为目标污染物,在太阳光模拟器下进行光催化实验,找出最佳铕掺杂浓度,然后利用最佳铕掺杂浓度的二氧化钛纤维降解不同pH值的酸性红3R溶液,找到染料的最佳pH值,结果发现:当铕掺杂摩尔比为1%,pH值为3时,40 mg二氧化钛纤维经过25 min即可将40 mg/L的酸性红3R染料降解98%以上.关键词:静电纺丝技术;铕掺杂;二氧化钛纤维;光催化中图分类号:O634 文献标志码:A 文章编号:1000-1565(2020)03-0255-05Preparation and photocatalytic activity of electrospun europium-doped TiO₂ nanofibersLIU Shuang'an¹, SHAN Yiyang¹, TANG Haoran¹, LI Meng¹, CHEN Jiaxin², YUAN Xiaoxian¹(1. Hebei Key Lab of Optic-electronic Information and Materials, National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, China; 2. College of Quality and Technical Supervision, Hebei University, Baoding 071002, China)Abstract: In this paper, polyvinyl pyrrolidone(PVP), N,N-dimethyl formamide(DMF), glacial acetic acid, absolute ethyl alcohol, tetrabutyl titanate and europium nitrate were used as raw materials to prepare titanium dioxide fibers with different doping concentrations by electrospinning. The morphology and composition of the titanium dioxide fibers were investigated using scanning electron microscopy(SEM)and X-ray powder diffraction(XRD). The diameter of the nanofibers was 300—400 nm before calcination, and became 200-300 nm after calcination. They were indexed to anatase phase. The acid red 3R solution was adopted as the- 收稿日期:2019-08-27 基金项目:河北大学实验室开放项目(sy201849; sy201850);河北大学大学生创新创业计划训练资助项目(201910075007;201910075053;201910075056;2019153;2019149). 第一作者:刘双安(1996—),男,河北唐山人,河北大学在读硕士研究生,主要从事TiO₂光催化方向研究.E-mail:meiyingqishi000@163.com 通信作者:袁小先(1985—),女,河北保定人,河北大学实验师,主要从事新型纳米材料及光电器件方向研究.E-mail:lilinghbu@163.com第3期刘双安等:静电纺丝制备铕掺杂二氧化钛纳米纤维及其光催化性能target pollutant. The photocatalytic experiments were performed in the solar light simulator. In this experiment, we can find out the best doping concentration. And then, it was used to degrade acid red 3R solution with different pH values. The results were as follows: the optimal doping molar ratio was 1% and the optimal pH was 3, 40 mg of titanium dioxide fibers could degrade more than 98% of the acid red 3R dye in 25 minutes.

Key words: electrospinning technology, europium doping, TiO₂ nanofibers, photocatalysis