Photocatalytic Hydrogels with a High Transmission Polymer Network for Pollutant Remediation
Photocatalytic Hydrogels with a High Transmission Polymer Network for Pollutant Remediation
复制标题
DOI：
10.1021/acs.chemmater.1c02180
复制
发表时间：
2021-11
影响因子：
8.6
通讯作者：
Thomas Kuckhoff;K. Landfester;Kai A. I. Zhang;Calum T. J. Ferguson
中科院分区：
文献类型：
--
作者：
Thomas Kuckhoff;K. Landfester;Kai A. I. Zhang;Calum T. J. Ferguson
高效的非均相和无金属光催化剂是近年来污染物修复的可重复使用材料。然而，由于光催化材料的性能不均匀和光的低效使用，光穿透光催化材料的能力差目前限制了现代光催化系统。在这里，我们提出了一个经典的光催化聚合物水凝胶由高透光率聚合物网络和小的共轭光催化部分组成。光催化活性苯并噻二唑丙烯酰胺单体与水相容的n -二甲基丙烯酰胺自由基共聚制备了光催化水凝胶，其中只有光催化部分吸收可见光。光催化水凝胶网络可以很容易地将污染物划分到凝胶网络中，在那里它们被光催化降解。光催化材料的多功能性和可重复使用性被证明可以降解无机金属和有机污染物，包括n -（磷甲乙基）甘氨酸（草甘膦），最常用的除草剂。此外，这种材料的潜力在大规模实验中得到了探索，草甘膦可以在半升的规模下很容易地光降解。
Efficient heterogeneous and metal-free photocatalysts have recently been targeted as reusable materials for pollutant remediation. However, poor light penetration into photocatalytic materials currently limits modern photocatalytic systems due to uneven performance across the photocatalytic material and inefficient light usage. Here, we present a classical photocatalytic polymer hydrogel composed of a high transmittance polymer network and small conjugated photocatalytic moieties. Radical copolymerization of a photocatalytically active benzothiadiazole acrylamide monomer with water-compatibleN,N-dimethylacrylamide produced a photocatalytic hydrogel where only the photocatalytic moiety absorbs visible light. The photocatalytic hydrogel network enables easy partitioning of pollutants into the gel network, where they are photocatalytically degraded. The versatility and reusability of the photocatalytic material were demonstrated for degradation of both inorganic metal and organic contaminants, includingN-(phosphonomethyl)glycine (glyphosate), the most commonly used herbicide. Furthermore, the potential of this material was explored in large-scale experiments, where glyphosate could be readily photodegraded at a half liter scale.