文献类型： 外文期刊

作者： Zheng, Zhijuan ¹ ; Xu, Ke ¹ ; Lu, Feifei ² ; Zhong, Baohua ¹ ; You, Lijun ¹ ; Xiong, Weijie ¹ ; Tang, Ting ¹ ; Wang, Shaoyun ¹ ;

作者机构： 1.Fuzhou Univ, Coll Biol Sci & Engn, Fuzhou 350116, Peoples R China

2.Fujian Acad Agr Sci, Inst Agr Qual Stand & Testing Technol Res, Fujian Key Lab Qual & Safety Agriprod, Fuzhou 350003, Peoples R China

关键词： Magnetic material; Covalent organic framework; Silver nanoparticles; Adsorption; Catalysis; Surface-enhanced Raman substrate

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：5.8； 五年影响因子：5.4 ）

ISSN： 0944-1344

年卷期： 2023 年 30 卷 12 期

页码：

收录情况： SCI

摘要： A magnetic covalent organic framework Fe3O4@BM was prepared with melamine and 4-4'-biphenyldialdehyde as monomers and used as adsorbent for Ag NP removal. Fe3O4@BM was characterized by zeta potential analysis, transform infrared spectrometry, X-ray diffraction, thermogravimetric analysis, contact angle, and N-2 adsorption-desorption. Fe3O4@ BM possessed plentiful amino groups, positive potential, and rapid separation performance, making it a promising adsorbent for silver nanoparticles. The adsorption process followed the pseudo-second-order kinetic equation and Langmuir isotherm model. The maximum adsorption capacity of Ag NPs calculated by the Langmuir isotherm model was 544.9 mg/ g. The adsorption product Fe3O4@BM@Ag could be recycled and efficiently catalyze the degradation of 4-nitrophenol within 6 min. Meanwhile, the recycled Fe3O4@BM@Ag could also be used as a surface-enhanced Raman substrate for DTNB detection, and the limit of detection of DTNB reached as low as 10(-7) mol/L. This work prepared a promising adsorbent Fe3O4@BM for Ag NP adsorption and provided a sustainable approach for the recycling of the adsorption product Fe3O4@BM@Ag.