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N-TiO2催化剂的制备及其在蓝光LED光照下对有机污染物的降解

邹敬桃 李旋坤 李光辉 张文启 孙雯

邹敬桃, 李旋坤, 李光辉, 张文启, 孙雯. N-TiO2催化剂的制备及其在蓝光LED光照下对有机污染物的降解[J]. 上海工程技术大学学报, 2023, 37(4): 351-358. doi: 10.12299/jsues.22-0190
引用本文: 邹敬桃, 李旋坤, 李光辉, 张文启, 孙雯. N-TiO2催化剂的制备及其在蓝光LED光照下对有机污染物的降解[J]. 上海工程技术大学学报, 2023, 37(4): 351-358. doi: 10.12299/jsues.22-0190
ZOU Jingtao, LI Xuankun, LI Guanghui, ZHANG Wenqi, SUN Wen. Preparation of N-TiO2 photocatalyst and its degradation of organic pollutants under blue LED light[J]. Journal of Shanghai University of Engineering Science, 2023, 37(4): 351-358. doi: 10.12299/jsues.22-0190
Citation: ZOU Jingtao, LI Xuankun, LI Guanghui, ZHANG Wenqi, SUN Wen. Preparation of N-TiO2 photocatalyst and its degradation of organic pollutants under blue LED light[J]. Journal of Shanghai University of Engineering Science, 2023, 37(4): 351-358. doi: 10.12299/jsues.22-0190

N-TiO2催化剂的制备及其在蓝光LED光照下对有机污染物的降解

doi: 10.12299/jsues.22-0190
基金项目: 山东省自然科学基金青年项目资助(ZR2021QE223)
详细信息
    作者简介:

    邹敬桃(1996−),女,硕士,研究方向为工业催化. E-mail:zoujingtao2022@163.com

    通讯作者:

    李旋坤(1989−),男,讲师,博士,研究方向为环境化学与膜分离技术. E-mail:li.xuankun@sues.edu.cn

  • 中图分类号: O643.36

Preparation of N-TiO2 photocatalyst and its degradation of organic pollutants under blue LED light

  • 摘要: 分别采用机械化学法、水解沉淀法和溶胶−凝胶法合成了氮掺杂二氧化钛(N-TiO2)催化剂,以亚甲基蓝(Methylene Blue, MB)和盐酸四环素(Tetracycline hydrochloride, TTC)为目标污染物. 光催化实验及催化剂的形貌表征对比表明,水解沉淀法合成的N-TiO2-H具有较高蓝光催化活性且颗粒分布均匀,无团聚现象. 选用N-TiO2-H进一步探讨煅烧温度、催化剂投加量、pH及降解底物初始浓度对光催化降解反应的影响. 研究表明,400 ℃煅烧下制备的N-TiO2-H具有最佳蓝光催化活性. 当反应pH=7时,0.5 g/L N-TiO2-H在460 nm蓝光照射下2 h可将初始浓度为5 mg/L的MB去除89.7%;当pH=5时,光照1.5 h可将初始浓度为50 mg/L的TTC,去除75.2%.
  • 图  1  LED环形灯筒

    Figure  1.  LED ring lamp cylinder

    图  2  N-TiO2样品的扫描电镜图

    Figure  2.  SEM images of N-TiO2 samples

    图  3  N-TiO2样品的XRD谱图

    Figure  3.  XRD spectrum of N-TiO2 samples

    图  4  N-TiO2样品的紫外−可见光谱图

    Figure  4.  UV-vis spectrum of N-TiO2 samples

    图  5  制备方法对N-TiO2光催化降解有机污染物的影响

    Figure  5.  Effect of preparation methods on photocatalytic degradation of organic pollutants by N-TiO2

    图  6  煅烧温度对N-TiO2-H光催化降解有机污染物的影响

    Figure  6.  Effects of calcination temperatures on photocatalytic degradation of organic pollutants by N-TiO2-H

    图  7  投加量对N-TiO2-H光催化降解有机污染物的影响

    Figure  7.  Effect of dosage on photocatalytic degradation of organic pollutants by N-TiO2-H

    图  8  溶液pH对N-TiO2-H光催化降解有机污染物的影响

    Figure  8.  Effect of solution pH on photocatalytic degradation of organic pollutants by N-TiO2-H

    图  9  N-TiO2-H对不同浓度有机污染物降解的影响

    Figure  9.  Effect of N-TiO2-H on degradation of organic pollutants in different concentrations

    图  10  重复使用N-TiO2-H对有机污染物降解的影响

    Figure  10.  Effect of reuse of N-TiO2-H on degradation of organic pollutants

    表  1  实验试剂

    Table  1.   List of reagents

    试剂名称规格供应单位
    氨水(质量分数25%~28%)分析纯,AR上海泰坦科技股份有限公司
    尿素分析纯,AR国药集团化学试剂有限公司
    钛酸四丁酯分析纯,AR上海泰坦科技股份有限公司
    无水乙醇分析纯,AR上海泰坦科技股份有限公司
    硝酸分析纯,AR上海泰坦科技股份有限公司
    TiO2(P25型)纯度 ≥ 99.5%德国Degussa有限公司
    盐酸四环素(TTC)分析纯,AR阿拉丁试剂(上海)有限公司
    亚甲基蓝(MB)分析纯,AR国药集团化学试剂有有限公司
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-06-22
  • 刊出日期:  2023-12-30

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