Adsorption is an attractive technique for the removal of volatile organic compounds (VOCs) from polluted air; however, it is still challenging to efficiently release adsorbed VOCs. Herein, in consideration of the unprecedented VOC adsorption capability of MOFs and excellent photothermal effects of Ag nanoparticles, a novel photodynamic Ag/UiO-66 adsorbent was constructed by integrating Ag nanoparticles with UiO-66 using a colloidal deposition method. The obtained Ag/UiO-66 samples were found to possess the excellent porosity and high styrene adsorption capability of parent UiO-66. Upon exposure to simulated solar light, Ag nanoparticles could convert light energy into thermal energy, which gave rise to light-induced localized heat near Ag nanoparticles. Subsequently, this localized heat triggered the thermal desorption of the adsorbed styrene from Ag/UiO-66, thus successfully realizing efficient in situ regeneration of Ag/UiO-66 under solar light irradiation. Moreover, the desorption capacity can be effectively regulated by the Ag content. More importantly, the regenerability of Ag/UiO-66 remained intact even after five adsorption–desorption cycles; however, pure UiO-66 recovered only 51.6% of its adsorption capacity and maintained 77.0% of its desorption capacity after five cycles. Furthermore, adsorption kinetic parameters and a possible regeneration mechanism are described in detail.

中文翻译：

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通过太阳光触发的金属-有机骨架中的银纳米颗粒对苯乙烯的再生吸附吸附去除

吸附是一种从污染空气中去除挥发性有机化合物（VOC）的有吸引力的技术。然而，有效地释放吸附的VOC仍然具有挑战性。在此，考虑到MOF的空前的VOC吸附能力和Ag纳米颗粒的优异的光热效应，通过使用胶体沉积法将Ag纳米颗粒与UiO-66结合而构建了新型的光动力学Ag / UiO-66吸附剂。发现所获得的Ag / UiO-66样品具有优异的孔隙度和母体UiO-66的高苯乙烯吸附能力。暴露于模拟太阳光后，Ag纳米颗粒可以将光能转换成热能，从而在Ag纳米颗粒附近产生光诱导的局部热。后来，太阳光照射下Ag / UiO-66的原位再生。而且，可以通过Ag含量有效地调节解吸容量。更重要的是，即使经过五个吸附-解吸循环，Ag / UiO-66的可再生性仍保持不变。但是，纯的UiO-66在五个循环后仅能恢复其吸附容量的51.6％，并保持其脱附容量的77.0％。此外，详细描述了吸附动力学参数和可能的再生机理。