磁化杯芳烃：用羧基取代杯芳烃[4]芳烃制备的Fe <sub>3</sub> O <sub>4</sub>纳米颗粒从水性介质中去除偶氮染料,Journal of Chemical & Engineering Data

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磁化杯芳烃：用羧基取代杯芳烃[4]芳烃制备的Fe ₃ O ₄纳米颗粒从水性介质中去除偶氮染料
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2017-06-09 00:00:00 , DOI: 10.1021/acs.jced.7b00128
Asif Ali Bhatti ₁ , Mehmet Oguz , Mustafa Yilmaz

Affiliation

将杯[4]芳烃与异二十二烯酸反应合成曼尼希碱衍生物，将Fe ₃ O ₄磁性纳米粒子通过醚键键合到杯[4]芳烃衍生物的下缘，得到羧基杯[4]芳烃磁性纳米粒子（CCMN）。用透射电子显微镜和傅里叶变换红外光谱进行表征后，进行吸附研究以去除偶氮染料（伊文思蓝和芝加哥天蓝6 B）。优化了吸附参数，例如pH，剂量，浓度，温度和时间的影响。结果表明，在15分钟内达到了吸附平衡，两种染料在pH 2.5时的最大吸附％被计算为95％。平衡等温线研究表明，吸附机理遵循化学离子交换过程，对Evans Blue和Chicago Sky Blue 6 B的吸附容量分别为13.9和17.5 mmol g ^–1。吸附动力学遵循拟由R ²预测的拟二级动力学值，而热力学参数表明吸热反应，这也可以从ΔG °值中看出，随着温度的升高而降低，表明是自发反应。另外，连续10个循环后，几乎没有影响CCMN的染料去除效率。研究表明，可磁回收的杯[4]芳烃是一种从水溶液中去除偶氮染料的有前途的吸附剂。

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Magnetizing Calixarene: Azo Dye Removal from Aqueous Media by Fe3O4 Nanoparticles Fabricated with Carboxylic-Substituted Calix[4]arene

Calix[4]arene was reacted with isonipecotic acid to synthesize the Mannich base derivative, and Fe₃O₄ magnetic nanoparticles were bonded to the lower rim of the calix[4]arene derivative through ether linkage to obtain carboxylic calix[4]arene magnetic nanoparticles (CCMN). After characterization with transmission electron microscopy and Fourier transform infrared spectroscopy, adsorption studies were carried out for the removal of azo dyes (Evans Blue and Chicago Sky Blue 6 B). Adsorption parameters such as effects of pH, dosage, concentration, temperature, and time were optimized. Results showed that adsorption equilibrium was achieved within 15 min, and maximum % adsorption was calculated as 95% for both dyes at pH 2.5. An equilibrium isotherm study suggests that the adsorption mechanism follows a chemical ion exchange process with an adsorption capacity value of 13.9 and 17.5 mmol g^–1 for Evans Blue and Chicago Sky Blue 6 B, respectively. The adsorption kinetic follows pseudo-second-order kinetics as anticipated from R² values, whereas thermodynamic parameters suggest an endothermic reaction that can also be evident from ΔG° values, which decreased with an increase in temperature suggesting a spontaneous reaction. In addition, the dye removal efficiency of CCMN was hardly effected after 10 consecutive cycles. The study suggests that the magnetically retrievable calix[4]arene is a promising adsorbent for removal of azo dyes from aqueous solution.

更新日期：2017-07-12

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