上海理工大学廉孜超团队报道了原子分散Ag–Co光催化剂介导的光自fenton反应对有机污染物的高效降解。相关研究成果发表在2024年1月8日出版的《德国应用化学》。

实现废水中持久性污染物的完全矿化仍然是一个巨大的挑战。

该文中，研究人员提出了一种有效的光自Fenton反应，使用嵌入图形氮化碳（AgCo-CN）中的原子分散AgCo双位点的高密度（Ag:22wt%）来降解不同的污染物。综合实验测量和密度泛函理论（DFT）计算表明，AgCo-CN中的Ag和Co双位点分别在加速光诱导电荷分离，和形成自Fenton氧化还原中心方面发挥着关键作用。

双金属AgCo-CN即使在极端条件下也对苯酚表现出优异的光催化性能，这是由于其有效的降解途径和产生主要活性氧（·OH和¹O₂）过氧化氢的原位生成，并且在自行设计的光过滤反应器中显示出长期的苯酚纯化活性。

该发现为设计用于难降解污染物处理的、基于光自Fenton反应的高效单原子光催化剂铺平了道路。

附：英文原文

Title: Photo-self-Fenton Reaction Mediated by Atomically Dispersed Ag–Co Photocatalysts toward Efficient Degradation of Organic Pollutants

Author: Zichao Lian, Fangfang Gao, Han Xiao, Di Luo, Mengyuan Li, Duoduo Fang, Yupeng Yang, Jiangzhi Zi, Hexing Li

Issue&Volume: 2024-01-08

Abstract: Achieving the complete mineralization of persistent pollutants in wastewater is still a big challenge. Here, we propose an efficient photo-self-Fenton reaction for the degradation of different pollutants using the high-density (Ag: 22 wt%) of atomically dispersed AgCo dual sites embedded in graphic carbon nitride (AgCo-CN). Comprehensive experimental measurements and density functional theory (DFT) calculations demonstrate that the Ag and Co dual sites in AgCo-CN play a critical role in accelerating the photoinduced charge separation and forming the self-Fenton redox centers, respectively. The bimetallic AgCo-CN exhibited excellent photocatalytic performance toward the phenol even under extreme conditions due to an efficient degradation pathway and in-situ generation of the hydrogen peroxide producing the main active oxygen species (·OH and 1O2) and showed long-term activity in a self-design photo-Filter reactor for the purification of the phenol. Our discoveries pave the way for the design of efficient single-atoms photocatalysts-based photo-self-Fenton reaction for recalcitrant pollutant treatment.

DOI: 10.1002/anie.202318927

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202318927