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铜基金属有机框架耦合过硫酸盐去除邻苯二甲酸二丁酯的效率及机制

The efficiency and mechanism of dibutyl phthalate removal by copper-based metal organic frameworks coupled with persulfate.

作者信息

Li Huanxuan, Qin Jialing, Zhang Yayun, Xu Shaodan, Du Jia, Tang Junhong

机构信息

Hangzhou Dianzi University, College Materials & Environmental Engineering Hangzhou 310018 Zhejiang PR China

The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Center Guangzhou 510006 PR China.

出版信息

RSC Adv. 2018 Nov 26;8(69):39352-39361. doi: 10.1039/c8ra08285e. eCollection 2018 Nov 23.

DOI:10.1039/c8ra08285e
PMID:35558059
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9090961/
Abstract

Copper-based metal organic framework (Cu-BTC) was prepared and used to remove dibutyl phthalate (DBP) in the presence of persulfate (PS). The surface characteristics, textural properties, and stability of activated Cu-BTC (denoted as Cu-BTC-A) were evaluated by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, N physical adsorption-desorption, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The effects of parameters such as initial pH, PS concentration, catalyst dosage, and free-radical quenchers have been investigated. The results showed that DBP could be removed in a wide pH range by Cu-BTC-A mechanisms of adsorption and heterogeneous catalytic reaction. Unfortunately, the DBP removal was not completed because of radical scavenging reactions in Cu-BTC-A cages where PS can enter freely but DBP is blocked outside. Another explanation was that Cu-BTC-A showed a low adsorption capacity for DBP because the molecular size of DBP (15.84 × 11.00 × 7.56 Å) is larger than microporous cages (approximately 9 × 9 Å in diameter) of Cu-BTC-A.

摘要

制备了铜基金属有机框架（Cu-BTC），并用于在过硫酸盐（PS）存在下去除邻苯二甲酸二丁酯（DBP）。通过扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）、拉曼光谱、N2物理吸附-脱附、电化学阻抗谱（EIS）和循环伏安法（CV）对活化后的Cu-BTC（记为Cu-BTC-A）的表面特性、织构性质和稳定性进行了评估。研究了初始pH值、PS浓度、催化剂用量和自由基猝灭剂等参数的影响。结果表明，Cu-BTC-A可通过吸附和非均相催化反应机制在较宽的pH范围内去除DBP。遗憾的是，由于在Cu-BTC-A笼中发生自由基清除反应，DBP的去除未完成，在该笼中PS可自由进入但DBP被阻挡在外。另一种解释是，Cu-BTC-A对DBP的吸附容量较低，因为DBP的分子尺寸（15.84×11.00×7.56 Å）大于Cu-BTC-A的微孔笼（直径约9×9 Å）。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/28152bfb059d/c8ra08285e-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/0330024ddbc4/c8ra08285e-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/81c783a8fb85/c8ra08285e-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/f691a369844f/c8ra08285e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/28152bfb059d/c8ra08285e-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/0330024ddbc4/c8ra08285e-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/30a645da8bac/c8ra08285e-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/15c49b777182/c8ra08285e-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/867c27e076ab/c8ra08285e-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/441969949ca3/c8ra08285e-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/b0a5501a6beb/c8ra08285e-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/81c783a8fb85/c8ra08285e-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/f691a369844f/c8ra08285e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32c4/9090961/28152bfb059d/c8ra08285e-s1.jpg

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