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

机译：铜基金属有机骨架结合过硫酸盐去除邻苯二甲酸二丁酯的效率和机理

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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 _(2) 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 via 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 ?) is larger than microporous cages (approximately 9 × 9 ? in diameter) of Cu-BTC-A.
机译：制备了铜基金属有机骨架（Cu-BTC），并在过硫酸盐（PS）存在下将其用于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），傅立叶变换红外光谱（FTIR），X-射线衍射法评估了活化的Cu-BTC（表示为Cu-BTC-A）的表面特性，质构性质和稳定性。射线光电子能谱（XPS），拉曼光谱，N _（2）物理吸附-解吸，电化学阻抗谱（EIS）和循环伏安法（CV）。已经研究了诸如初始pH，PS浓度，催化剂用量和自由基淬灭剂等参数的影响。结果表明，Cu-BTC-A可通过吸附和非均相催化反应机理在宽pH范围内去除DBP。不幸的是，由于在Cu-BTC-A笼子中发生了自由基清除反应，因此PS不能自由进入，而DBP却在外面被阻塞，因此DBP的清除尚未完成。另一个解释是，Cu-BTC-A对DBP的吸附能力低，因为DBP的分子大小（15.84×11.00×7.56？）大于Cu-BTC-A的微孔笼（直径约9×9？）。 。

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