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2018 , Vol. 38 >Issue 5: 480 - 489

DOI: https://doi.org/10.3969/j.issn.1000-1565.2018.05.006

Adsorption and photocatalytic performance of TiO2/AC composites

  • LI Mengyue ,
  • FANG Guoli ,
  • ZHANG Gang ,
  • WEI Jie ,
  • ZHENG Gong
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  • 1. School of Materials Science and Engineering, Beifang Minzu University, Yinchuan 750021, China; 2. Academic Journal Center, Ningxia University, Yinchuan 750021, China; 3. Joint Laboratory of NanostructuredMaterials and Technology, Nanjing University of Science and Technology, Nanjing 210094, China

Received date: 2017-11-02

  Online published: 2018-09-25

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Abstract

TiO2/AC composites have been prepared by the impregnated-hydrothermal method, and coal-based activated carbon was used as raw material. The TiO2 content in TiO2/AC composites is an important affective factor for the adsorption and photocatalytic activities of TiO2/AC composites. The monolayer adsorption capacities of the TiO2/AC composites containing 0, 10.2%, 11.4%, 12.6% and 13.2% are 13.8, 19.5, 18.3, 16.9 and 16.8 mg/g, respectively. It is obvious that the TiO2/AC composites containing 10.2% TiO2 exhibited much highest adsorption performance. The photocatalytic activities of the TiO2/AC composites have been evaluated by using Rh B as a model organic compound. With UV irradiation, the photodegradation efficiency of Rh B under TiO2/AC composites containing 11.4% TiO2 reached nearly 98.5% in 2 h, while this under P25 photocatalyst only reached 72.1%. It should be attributed to the strong interfacial interactions between activated carbon and TiO2, which promoted the separation of photogenerated- DOI:10.3969/j.issn.1000-1565.2018.05.006TiO2/AC复合材料的吸附性与光催化性能李梦悦1,房国丽1,张刚2,魏杰1,郑功3(1. 北方民族大学 材料科学与工程学院,宁夏 银川 750021;2. 宁夏大学 学术期刊中心,宁夏 银川 750021;3.南京理工大学 金属纳米联合实验室,江苏 南京 210094)摘 要:以煤基活性炭为原材料,采用浸渍-水热法合成TiO2/AC复合材料,进一步分析TiO2负载量对TiO2/AC复合材料吸附性能和光催化活性的影响.结果表明:TiO2负载量为10.2%时,TiO2/AC复合材料对Rh B的单层饱和吸附量为19.5 mg/g,高于煤基活性炭饱和吸附量13.8 mg/g.紫外光辐照下,不同负载量的TiO2/AC复合材料均表现出优异的光催化活性.TiO2负载量为11.4%时,紫外光辐照2 h后,TiO2/AC复合材料对Rh B降解率为98.5%,远高于同等条件下P25光催化剂对Rh B的降解率(72.1%).这是由于活性炭和TiO2之间的界面可以有效分离光生电子-空穴对,同时石墨化C的存在可以提高光生电子的迁移率,因此TiO2/AC复合材料表现出明显优于P25的光催化活性.关键词:负载TiO2活性炭复合材料(TiO2/AC);浸渍-水热法;吸附性;光催化活性中图分类号:TB321 文献标志码:A 文章编号:1000-1565(2018)05-0480-10Adsorption and photocatalytic performance of TiO2/AC compositesLI Mengyue1, FANG Guoli1, ZHANG Gang2, WEI Jie1, ZHENG Gong3(1. School of Materials Science and Engineering, Beifang Minzu University, Yinchuan 750021,China;2. Academic Journal Center, Ningxia University, Yinchuan 750021,China; 3. Joint Laboratory of NanostructuredMaterials and Technology,Nanjing University of Science and Technology, Nanjing 210094,China )Abstract: TiO2/AC composites have been prepared by the impregnated-hydrothermal method, and coal-based activated carbon was used as raw material. The TiO2 content in TiO2/AC composites is an important affective factor for the adsorption and photocatalytic activities of TiO2/AC composites. The monolayer adsorption capacities of the TiO2/AC composites containing 0, 10.2%, 11.4%, 12.6% and 13.2% are 13.8, 19.5, 18.3, 16.9 and 16.8 mg/g, respectively. It is obvious that the TiO2/AC composites containing 10.2% TiO2 exhibited much highest adsorption performance. The photocatalytic activities of the TiO2/AC composites have been evaluated by using Rh B as a model organic compound. With UV irradiation, the photodegradation efficiency of Rh B under TiO2/AC composites containing 11.4% TiO2 reached nearly 98.5% in 2 h, while this under P25 photocatalyst only reached 72.1%. It should be attributed to the strong interfacial interactions between activated carbon and TiO2, which promoted the separation of photogenerated- 收稿日期:2017-11-02 基金项目:宁夏自然科学基金资助项目(NZ17108);国家自然科学基金资助项目(51262001) 第一作者:李梦悦(1993-),女,甘肃武威人,北方民族大学在读硕士研究生,主要从事半导体功能材料合成研究.E-mail: leeklee511@163.com 通信作者:房国丽(1982-),女,山西河津人,北方民族大学副教授,博士,主要从事半导体功能材料、超微粉体材料控制合成研究. E-mail: fangguoli999@163.com第5期李梦悦等:TiO2/AC复合材料的吸附性与光催化性能electron-hole pairs. Moreover, the presence of graphitized C could improve the photogenerated electron mobility rate.

Key words： TiO2/AC composites; impregnation-hydrothermal method; adsorption; photocatalytic activity

Cite this article

LI Mengyue , FANG Guoli , ZHANG Gang , WEI Jie , ZHENG Gong . Adsorption and photocatalytic performance of TiO2/AC composites[J]. Journal of Hebei University(Natural Science Edition), 2018 , 38(5) : 480 -489 . DOI: 10.3969/j.issn.1000-1565.2018.05.006

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