太原理工大学学报

2019, v.50;No.225(05) 579-586

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rGO/TNTs复合光催化剂的制备及其降解苯酚的性能研究
Preparation of rGO/TNTs Composite Photocatalyst and Study on Efficiency of Phenol Degradation

李红艳;程济慈;张峰;王芳;李超;李尚明;
LI Hongyan;CHENG Jici;ZHANG Feng;WANG Fang;LI Chao;LI Shangming;College of Environmental Science and Engineering, Taiyuan University of Technology;Innovation Center for Postgraduate Education in Municipal Engineering of Shanxi Province;Research Center for Edible Fungus, Biological Research Institute co.,LTD of Shanxi Province;The first design department,Shouan Industrial Fire company;College of material Science and Engineering, Taiyuan University of Technology;

摘要(Abstract):

为提高光催化降解苯酚废水的性能,以P25为钛源,采用浓碱水热法制备二氧化钛纳米管(TNTs),水热法合成还原氧化石墨烯二氧化钛纳米管(rGO/TNTs)复合光催化剂。通过SEM,FTIR和EDS对材料进行了表征,并研究了不同的苯酚初始质量浓度、rGO/TNTs投加量、溶液pH值及H_2O_2添加量下rGO/TNTs对苯酚降解的反应动力学规律,测试了rGO/TNTs在紫外光和可见光下对水中苯酚的降解性能。结果表明,rGO和TNTs通过Ti—O—C化学键紧密结合在一起。不同影响因素下rGO/TNTs对苯酚的降解均符合一级反应动力学方程。在最佳光催化反应条件下,10 W紫外光和500 W可见光下rGO/TNTs对10 mg/L苯酚的降解率可分别达97%和98%。rGO/TNTs在较大程度上拓宽了TNTs的光响应范围,并具有较高的稳定性和循环利用率。
Phenol wastewater pollution is becoming more and more serious, which has threatened human health. In order to improve the photocatalytic degradation performance of phenol wastewater, titanium dioxide nanotubes(TNTs) were prepared by concentrated alkaline hydrothermal method with P25 as titanium source in this paper. The rGO/TNTs composite photocatalyst was synthesized by hydrothermal method. The materials were characterized by SEM, FTIR and EDS, and the reaction kinetics of rGO/TNTs to phenol degradation under different initial concentration of phenol, different dosages of rGO/TNTs, different solution pH values and different dosages of H_2O_2 were studied, and the degradation performance of rGO/TNTs to phenol in water under ultraviolet and visible light was tested. The results showed that rGO and TNTs were tightly bound together by the Ti—O—C chemical bonds. The degradation of phenol by rGO/TNTs under different influencing factors conforms to the first-order reaction kinetic equation. Under the optimal photocatalytic reaction conditions, the degradation rate of 10 mg/L phenol by rGO/TNTs under 10 W ultraviolet light and 500 W visible light can be up to 97% and 98%, respectively, which conforms to the first-order reaction kinetic equation. Under the optimal photocatalytic reaction conditions, the degradation rate of 10 mg/L phenol by rGO/TNTs under 10 W ultraviolet light and 500 W visible light could reach 97% and 98%, respectively. rGO/TNTs widened the light response range of TNTs to a large extent, and had high stability and recycling efficiency.

关键词(KeyWords): 二氧化钛纳米管;还原氧化石墨烯;苯酚;动力学
titanium dioxide nanotubes;reduced graphene oxide;phenol;dynamics

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基金项目(Foundation): 山西省重点研发计划项目(社会发展领域)(201803D31046);山西省重点研发计划项目(农业领域)(201703D211013);; 山西省研究生联合培养基地人才培养项目(2018JD19)

作者(Author): 李红艳;程济慈;张峰;王芳;李超;李尚明;
LI Hongyan;CHENG Jici;ZHANG Feng;WANG Fang;LI Chao;LI Shangming;College of Environmental Science and Engineering, Taiyuan University of Technology;Innovation Center for Postgraduate Education in Municipal Engineering of Shanxi Province;Research Center for Edible Fungus, Biological Research Institute co.,LTD of Shanxi Province;The first design department,Shouan Industrial Fire company;College of material Science and Engineering, Taiyuan University of Technology;

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