Wang Ning, Wang Fushuai, Pan Fei, Yu Shunyang, Pan Dawei
CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology of Shandong Province, Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, P. R. China.
Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, P. R. China.
ACS Appl Mater Interfaces. 2021 Jan 20;13(2):3209-3220. doi: 10.1021/acsami.0c20444. Epub 2021 Jan 6.
Developing new materials and novel technologies for the highly efficient treatment of toxic organic pollutants is highly desirable. Chemical reduction based on heterogeneous substrate/noble metal catalysts and the reducing agent NaBH has become an effective method in recent years. Here, a spherical covalent organic framework (SCOF) was designed to provide basic sites for Ag ions, by which small Ag NPs were immobilized on the SCOF to form Ag NPs@SCOF microspheres. The prepared microspheres exhibited a high catalytic reduction ability toward 4-nitrophenol (4-NP). An optimized permeation flux of 2000 L m h (LMH) and a more than 99% 4-NP reduction efficiency were obtained with flow-through experiments, which are far better than the reported results (below 200 LMH). Moreover, the microspheres could maintain stable catalytic performance under a continuous flow-through process. Our work provides an efficient material and technology that can be applied to easily treat toxic organic pollutants.
开发用于高效处理有毒有机污染物的新材料和新技术是非常必要的。近年来，基于非均相底物/贵金属催化剂和还原剂硼氢化钠（NaBH）的化学还原法已成为一种有效的方法。在此，设计了一种球形共价有机框架（SCOF）为银离子提供碱性位点，通过该位点将小尺寸的银纳米颗粒固定在SCOF上，形成Ag NPs@SCOF微球。制备的微球对4-硝基苯酚（4-NP）表现出高催化还原能力。通过流通实验获得了2000 L m⁻² h⁻¹（LMH）的优化渗透通量和超过99%的4-NP还原效率，这远优于已报道的结果（低于200 LMH）。此外，微球在连续流通过程中能够保持稳定的催化性能。我们的工作提供了一种可应用于轻松处理有毒有机污染物的高效材料和技术。
