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 ›› 2024, Vol. 56 ›› Issue (9): 147-153.doi: 10.19964/j.issn.1006-4990.2024-0244

• 催化材料 • 上一篇    下一篇

基于钯修饰的介孔TiO2纳米棒高效光降解四环素的研究

孙延龙1(), 袁广胜1, 王红军2()   

  1. 1.河南省核技术应用中心,河南 信阳 464000
    2.信阳师范大学,河南 信阳 464000
  • 收稿日期:2024-05-06 出版日期:2024-09-10 发布日期:2024-09-26
  • 通讯作者: 王红军(1979— ),男,副教授,主要从事半导体纳米材料的研究;E-mail:whj2016@163.com
  • 作者简介:孙延龙(1987— ),男,中级工程师,主要从事能源、新材料研究;E-mail:sunyanlong1987@163.com
  • 基金资助:
    国家自然科学基金青年项目(21876143)

Study on palladium modified mesoporous TiO2 nanorods for efficient photodegradation of tetracycline

SUN Yanlong1(), YUAN Guangsheng1, WANG Hongjun2()   

  1. 1.Henan Nuclear Technology Application Center, Xinyang 464000, China
    2.Xinyang Normal University, Xinyang 464000, China
  • Received:2024-05-06 Published:2024-09-10 Online:2024-09-26

摘要:

致力于开发一种高性能光催化剂,专门用于环境净化中四环素(TC)的有效降解。通过静电纺丝技术和硼氢化钠还原法,成功制备了金属钯颗粒均匀负载的介孔二氧化钛(Pd/mTiO2 NRs)纳米棒复合光催化剂。随后,对这些复合材料进行了光催化降解TC的活性评估实验。实验结果显示,具有3%最佳Pd负载量的Pd/mTiO2 NRs纳米复合物在光降解TC方面展现出了卓越的催化性能。在短短1 h的光反应后,TC的去除率高达96.4%,这一效率比单独的mTiO2 NRs(去除率约为67.1%)提高了约1.45倍。进一步利用准一级动力学模型分析,研究发现Pd/mTiO2 NRs具有非常高的降解速率常数,达到0.053 58 min-1,这一数值是单独mTiO2 NRs(0.010 68 min-1)的5倍之多。更重要的是,经过5次循环使用后,该复合光催化剂的光催化效率几乎保持不变,证明了其良好的结构稳定性和可循环使用性。该研究不仅为开发高效光催化剂提供了新的研究思路,而且为环境净化领域提供了有力的技术支持,为解决实际环境问题提供了有效的解决方案。

关键词: 四环素, 介孔TiO2纳米棒, 金属钯颗粒, 光催化降解

Abstract:

This study aims to develop a high-performance photocatalyst specifically designed for the effective degradation of tetracycline(TC) in environmental purification.The composite of mesoporous titanium dioxide nanorods uniformly loaded with palladium metal particles(Pd/mTiO2 NRs) was successfully prepared using electrospinning technology and sodium borohydride reduction method.Subsequently,the photocatalytic activity for TC degradation on these catalysts was evaluated.The experimental results showed that the Pd/mTiO2 NRs nanocomposites with an optimal Pd loading capacity of 3% demonstrated an excellent catalytic performance in photodegradation of TC.After 1 h of photoreaction,the removal rate of TC over the Pd/mTiO2 NRs catalyst was as high as 96.4%,which was about 1.45 times higher than that of the single mTiO2 NRs(removal rate 67.1%).Further analysis using a pseudo-first-order kinetic model revealed that the Pd/mTiO2 NRs sample possessed a very high degradation rate constant,reaching k=0.053 58 min-1,which was more than 5 times that of mTiO2 NRs(0.010 68 min-1).More importantly,after 5 cycles of use,the photocatalytic efficiency of the the Pd/mTiO2 NRs composite remained almost unchanged,demonstrating its good structural stability and recyclable.The present study not only provided new research ideas for the development of efficient photocatalysts,but also offered strong technical support for the field of environmental purification and effective approaches for solving practical environmental problems.

Key words: tetracycline, mesoporous TiO2 nanorods, metal palladium particles, photodegradation

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