In this study, a novel recyclable Co-doped UiO-66 nanoparticle was synthesized by a one-step solvothermal method. A high adsorption capacity of 224.1 mg g⁻¹ was obtained by the CoUiO-1 nanoparticle, then the adsorbed tetracycline (TC) molecules could be removed more than 94% of initial concentration under simulative sunlight irradiation. The adsorptive ability and photocatalytic performance of CoUiO-1 nanoparticle were about 7.6 and 6.9 times higher than the pristine UiO-66, respectively. The adsorption capacity of CoUiO-1 nanoparticle was sensitive to adsorbent dosage, coexisting ions, solution pH values and initial TC concentrations. Pseudo-second-order and Freundlich models fitted well with the adsorption process. Thermodynamic study indicated the TC adsorption on CoUiO-1 nanoparticle was a spontaneous and exothermic process. TC photodegradation experiment showed that the Co-doped modification expanded light absorption and facilitated charge separation of UiO-66, which was beneficial to enhance photocatalytic performance. The mechanism of TC photodegradation by Co-doped UiO-66 nanoparticle was investigated. Moreover, a plausible degradation pathway for TC was proposed. The high removal efficiencies of CoUiO-1 nanoparticle were obtained towards real samples including tap water, river water and pharmaceutical wastewater. Therefore, the novel Co-doped MOFs photocatalytic adsorbent showed great potential in wastewater treatment.

在这项研究中，通过一步溶剂热法合成了一种新型的可回收的共掺杂的UiO-66纳米粒子。224.1 mg g ^-1的高吸附容量通过CoUiO-1纳米颗粒获得的四氢呋喃，可在模拟阳光照射下将吸附的四环素（TC）分子去除超过初始浓度的94％。CoUiO-1纳米颗粒的吸附能力和光催化性能分别比原始UiO-66高7.6倍和6.9倍。CoUiO-1纳米颗粒的吸附能力对吸附剂剂量，共存离子，溶液pH值和初始TC浓度敏感。伪二阶和Freundlich模型与吸附过程非常吻合。热力学研究表明，TC在CoUiO-1纳米颗粒上的吸附是一个自发的，放热的过程。TC光降解实验表明，Co掺杂修饰可扩展UiO-66的光吸收并促进电荷分离，这有利于增强光催化性能。研究了共掺杂UiO-66纳米粒子对TC的光降解机理。此外，提出了一种可能的TC降解途径。CoUiO-1纳米颗粒对包括自来水，河水和制药废水在内的真实样品具有很高的去除效率。因此，新型共掺杂MOFs光催化吸附剂在废水处理中显示出巨大的潜力。