无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (4): 133-140.doi: 10.19964/j.issn.1006-4990.2022-0329

• 催化材料 • 上一篇    

铈钛氧化物-凹凸棒土的制备及其光催化性能

兰蓥华(), 陈艳梅, 马瑞霄, 张燕辉()   

  1. 闽南师范大学化学化工与环境学院,福建 漳州 363000
  • 收稿日期:2022-05-26 出版日期:2023-04-10 发布日期:2023-04-13
  • 通讯作者: 张燕辉(1986— ),男,博士,副教授,主要研究方向为光催化、多相催化;E-mail:zhangyh@mnnu.edu.cn
  • 作者简介:兰蓥华(1998— ),男,硕士研究生,主要研究方向为光催化;E-mail:1359812701@qq.com
  • 基金资助:
    国家自然科学基金青年项目(21703094);福建省自然科学基金面上项目(2019J01743);大学生创新创业训练计划国家级项目(202110402019)

Preparation and photocatalytic performance of Ce-Ti oxide-attapulgite composites

LAN Yinghua(), CHEN Yanmei, MA Ruixiao, ZHANG Yanhui()   

  1. College of Chemistry,Chemical Engineering and Environment,Minnan Normal University,Zhangzhou 363000,China
  • Received:2022-05-26 Published:2023-04-10 Online:2023-04-13

摘要:

通过溶胶-凝胶法制得Ce-Ti混合物与凹凸棒土(ATP)的干凝胶,再经过煅烧处理获得Ce0.5Ti0.5O2-ATP复合材料。在光催化降解抗生素环丙沙星研究中发现,ATP质量分数为5%时,可以显著提高Ce0.5Ti0.5O2-ATP的光催化活性。通过系列表征获得复合材料的晶相结构、形貌、表面状态等信息,验证Ce0.5Ti0.5O2与ATP之间进行了有效复合。对催化剂的吸附性能、光吸收强度和范围、光生载流子复合率进行比较发现Ce0.5Ti0.5O2-ATP复合材料能够提高光吸收能力和有效延长光生载流子寿命。结合自由基捕获实验进一步验证了光生空穴与羟基自由基在光催化降解环丙沙星中起主要作用。进而,结合总有机碳测试提出Ce0.5Ti0.5O2-ATP复合材料光催化降解环丙沙星可能的反应机理。

关键词: 铈钛氧化物, 凹凸棒土, 光催化, 复合材料, 降解环丙沙星, 环境净化

Abstract:

The dry gels of the Ce-Ti mixture with attapulgite(ATP) were synthesized by sol-gel method and then were calcined to obtain Ce0.5Ti0.5O2-ATP composites.In the study of photocatalytic degradation of the antibiotic ciprofloxacin,it was found that the photocatalytic activity of Ce0.5Ti0.5O2-ATP could be significantly improved at 5% of ATP mass.A series of characterisation was carried out to obtain the composite's crystalline phase structure,morphology and surface state information,and to verify the effective recombination between Ce0.5Ti0.5O2 and ATP.The test of the adsorption performance,light absorption intensity and range,and photogenerated carrier recombination rate of the catalysts revealed that the Ce0.5Ti0.5O2-ATP composite could improve the light absorption ability and significantly increase the photogenerated carrier lifetime.It was further verified that the photogenerated holes and hydroxyl radicals were the main factors in the photocatalytic degradation of ciprofloxacin in combination with free radical capture experiments.On the basis of the total organic carbon test,a possible reaction mechanism for the photocatalytic degradation of ciprofloxacin by Ce0.5Ti0.5O2-ATP composites was proposed.

Key words: Ce-Ti oxide, attapulgite, photocatalysis, composite materials, degradation of ciprofloxacin, environmental purification

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