纺织学报 ›› 2022, Vol. 43 ›› Issue (11): 133-140.doi: 10.13475/j.fzxb.20210902908

• 染整与化学品 • 上一篇    下一篇

混合价态铁基金属有机框架催化过氧乙酸高效降解对硝基苯酚

胡倩1,2, 杨涛语1, 朱斐超3, 吕汪洋3,4, 吴明华1,3, 余德游1,2,4()   

  1. 1.浙江理工大学 生态染整技术教育部工程研究中心, 浙江 杭州 310018
    2.浙江理工大学 桐乡研究院, 浙江嘉兴 314500
    3.浙江理工大学 先进纺织材料与制备技术教育部重点实验室, 浙江 杭州 310018
    4.浙江理工大学 材料科学与工程学院, 浙江 杭州 310018
  • 收稿日期:2021-09-09 修回日期:2022-03-15 出版日期:2022-11-15 发布日期:2022-12-26
  • 通讯作者: 余德游
  • 作者简介:胡倩(1991—),女,博士生。主要研究方向为印染废水处理及再生利用。
  • 基金资助:
    国家自然科学基金项目(22106141);中国博士后科学基金项目(2022M712827);浙江理工大学桐乡研究院博士后基金资助项目(TYY202103)

Peracetic acid activation for efficient degradation of p-nitrophenol by mixed-valence iron-based metal-organic framework

HU Qian1,2, YANG Taoyu1, ZHU Feichao3, LÜ Wangyang3,4, WU Minghua1,3, YU Deyou1,2,4()   

  1. 1. Engineering Research Center for Eco-Dyeing and Finishing of Textiles, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. Tongxiang Research Institute, Zhejiang Sci-Tech University, Jiaxing, Zhejiang 314500, China
    3. Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    4. School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2021-09-09 Revised:2022-03-15 Published:2022-11-15 Online:2022-12-26
  • Contact: YU Deyou

摘要:

为提升铁基金属有机框架(Fe-MOFs)对印染废水深度处理的效能,采用原位掺杂溶剂热技术制备了混合Fe(Ⅱ)/Fe(Ⅲ)价态MIL-53(Fe)(MV-MIL-53(Fe))催化剂。借助X射线粉末衍射仪、场发射扫描电镜、氮气吸附仪和吡啶吸附红外光谱仪等对MV-MIL-53(Fe)晶体结构、微观形貌、孔结构和表面酸位等本征结构进行了测试分析。选取对硝基苯酚(4-NP)作为印染废水模型污染物,以过氧乙酸(PAA)为氧源,研究了MV-MIL-53(Fe)催化PAA降解4-NP的性能和关键活性物种。结果表明:Fe(Ⅱ)的引入提高了MIL-53(Fe)表面Lewis酸位密度,为PAA催化活化提供了更丰富更高效的活性位点;MV-MIL-53(Fe)/PAA体系对4-NP的降解速率常数高达0.052 1 min-1,分别是MV-MIL-53(Fe)/H2O2、MIL-53(Fe)/PAA和MIL-53(Fe)/H2O2体系的2.05、1.45和6.68倍,且MV-MIL-53(Fe)重复循环使用5次后仍保持良好的结构稳定性和催化降解性能;羟基自由基(·OH)是MV-MIL-53(Fe)催化PAA快速降解4-NP的关键活性物质。

关键词: 铁基金属有机框架, 过氧乙酸, 催化降解, 对硝基苯酚, 印染废水

Abstract:

In order to improve the advanced treatment efficiency of iron-based metal-organic frame-works (Fe-MOFs) for printing and dyeing wastewater, mixed-valence MIL-53(Fe) (MV-MIL-53(Fe)) containing Fe(Ⅱ) and Fe(Ⅲ) was prepared by an in-situ doping solvothermal approach. The MV-MIL-53(Fe) was systematically characterized with X-ray diffraction, scanning electron microscopy, nitrogen adsorption equipment, and pyridine chemisorbed infrared spectroscopy. p-nitrophenol and peracetic acid (PAA) were selected as the model target and green oxidant respectively to study the degradation activity and major active species of MV-MIL-53(Fe). The results show that Fe(Ⅱ) dopant increased the Lewis acidity of MIL-53(Fe), thus offering more active sites for PAA activation. The 4-NP degradation kinetic rate constant of MV-MIL-53(Fe)/PAA system could reach to 0.052 1 min-1, which was 2.05, 1.45, and 6.68 times higher than MV-MIL-53(Fe)/H2O2, MIL-53(Fe)/PAA, and MIL-53(Fe)/H2O2 counterparts, respectively. After successive cycling for five runs, the MV-MIL-53(Fe) still exhibited good structure stability and catalysis activity for 4-NP degradation using PAA. Hydroxyl radicals were verified as the main reactive species converting from PAA for the rapid degradation of 4-NP.

Key words: iron-based metal-organic framework, peracetic acid, catalytic degradation, p-nitrophenol, dyeing and printing wastewater

中图分类号: 

  • O643.32

图1

MV-MIL-53(Fe)和MIL-53(Fe)催化剂的XRD谱图"

图2

MV-MIL-53(Fe)和MIL-53(Fe)催化剂的分子结构和元素组成"

图3

MV-MIL-53(Fe)和MIL-53(Fe)催化剂的表面形貌和孔结构特征"

表1

MV-MIL-53(Fe)和MIL-53(Fe)催化剂酸位密度"

样品名称 酸位强度 酸位密度/(mmol·g-1)
细分 总计
MIL-53(Fe) 弱酸 0.48 2.59
中酸 0.82
强酸 1.29
MV-MIL-53(Fe) 弱酸 1.00 3.49
中酸 1.64
强酸 0.85

图4

MV-MIL-53(Fe)催化PAA或H2O2降解4-NP性能比较"

图5

MV-MIL-53(Fe)催化剂重复使用性能和结构稳定性"

图6

MV-MIL-53(Fe)催化PAA降解4-NP关键活性物质识别"

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