In this research, UiO-66 and its composite nanoparticles with thermally oxidized nanodiamond (OND) were synthesized via a simple solvothermal method and utilized as solid adsorbent for the removal of anionic methyl red (MR) dye and cationic malachite green (MG) dye from contaminated water. The synthesized adsorbents were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), N2 adsorption-desorption, and zeta potential analyzer. The influences of various factors such as initial concentrations of the dyes, adsorption process time, solution pH, solution temperature and ionic strength on adsorption behavior of MR dye onto OND-UiO hybrid nanoparticle were investigated. The adsorption of MR onto OND-UiO hybrid nanoparticle could be well described by Langmuir isotherm model. Meanwhile, pseudo-second order kinetic model was found to be suitable for illustration of adsorption kinetics of MR onto OND-UiO. Thermodynamic investigation suggested that the adsorption process was spontaneous and endothermic, and controlled by an entropy change instead of enthalpy effect. The experimental adsorption results indicated that OND-UiO hybrid nanoparticle could simultaneously adsorb 59% of MR and 43% of MG from the mixture of both dyes in only 2 min showing synergistic effect compared with single UiO-66 and OND nanoparticles in terms of adsorption rate and removal capacity of anionic dyes. The appropriate removal efficiency, rapid adsorption kinetic, high water stability, and good reusability make OND-UiO hybrid nanoparticle attractive candidate for simultaneously removal of both anionic MR and cationic MG dyes from wastewater.

中文翻译：

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纳米金刚石/ UiO-66杂化纳米复合材料可超快同时去除阴离子和阳离子染料。

在这项研究中，通过简单的溶剂热法合成了UiO-66及其具有热氧化纳米金刚石（OND）的复合纳米颗粒，并用作固体吸附剂，用于去除阴离子甲基红（MR）染料和阳离子孔雀绿（MG）染料。被污染的水。合成的吸附剂通过傅立叶变换红外光谱（FTIR），X射线衍射（XRD），场发射扫描电子显微镜（FESEM），热重分析（TGA），N2吸附-脱附和zeta电位分析仪进行分析。研究了染料的初始浓度，吸附过程时间，溶液pH，溶液温度和离子强度等各种因素对MR染料在OND-UiO杂化纳米粒子上的吸附行为的影响。Langmuir等温模型可以很好地描述MR在OND-UiO杂化纳米颗粒上的吸附。同时，发现伪二级动力学模型适用于说明MR在OND-UiO上的吸附动力学。热力学研究表明，吸附过程是自发的和吸热的，并且受熵的变化而不是焓的影响所控制。实验吸附结果表明，OND-UiO杂化纳米颗粒仅在2分钟内即可同时从两种染料的混合物中吸附59％的MR和43％的MG，与单个UiO-66和OND纳米颗粒相比，其吸附速率具有协同作用和阴离子染料的去除能力。适当的去除效率，快速的吸附动力学，高水稳定性，