ALBERT

Beschreibung: 〈p〉Publication date: 5 May 2020〈/p〉 〈p〉〈b〉Source:〈/b〉 Journal of Hazardous Materials, Volume 389〈/p〉 〈p〉Author(s): Li-Zhi Huang, Chu Zhou, Miaolong Shen, Enlai Gao, Chunbo Zhang, Xin-Ming Hu, Yiqun Chen, Yingwen Xue, Zizheng Liu〈/p〉 〈h5〉Abstract〈/h5〉 〈div〉〈p〉Developing efficient catalysts for persulfate (PS) activation is important for the potential application of sulfate-radical-based advanced oxidation process. Herein, we demonstrate single iron atoms confined in MoS〈sub〉2〈/sub〉 nanosheets with dual catalytic sites and synergistic catalysis as highly reactive and stable catalysts for efficient catalytic oxidation of recalcitrant organic pollutants 〈em〉via〈/em〉 activation of PS. The dual reaction sites and the interaction between Fe and Mo greatly enhance the catalytic performance for PS activation. The radical scavenger experiments and electron paramagnetic resonance results confirm and SO〈sub〉4〈/sub〉〈sup〉〈img src="https://sdfestaticassets-eu-west-1.sciencedirectassets.com/shared-assets/16/entities/rad"〉〈/sup〉〈sup〉−〈/sup〉 rather than HO〈sup〉〈img src="https://sdfestaticassets-eu-west-1.sciencedirectassets.com/shared-assets/16/entities/rad"〉〈/sup〉 is responsible for aniline degradation. The high catalytic performance of Fe〈sub〉0.36〈/sub〉Mo〈sub〉0.64〈/sub〉S〈sub〉2〈/sub〉 was interpreted by density functional theory (DFT) calculations 〈em〉via〈/em〉 strong metal-support interactions and the low formal oxidation state of Fe in Fe〈em〉〈sub〉x〈/sub〉〈/em〉Mo〈sub〉1-〈/sub〉〈em〉〈sub〉x〈/sub〉〈/em〉S〈sub〉2〈/sub〉. Fe〈em〉〈sub〉x〈/sub〉〈/em〉Mo〈sub〉1-〈/sub〉〈em〉〈sub〉x〈/sub〉〈/em〉S〈sub〉2〈/sub〉/PS system can effectively remove various persistent organic pollutants and works well in a real water environment. Also, Fe〈em〉〈sub〉x〈/sub〉〈/em〉Mo〈sub〉1-〈/sub〉〈em〉〈sub〉x〈/sub〉〈/em〉S〈sub〉2〈/sub〉 can efficiently activate peroxymonosulfate, sulfite and H〈sub〉2〈/sub〉O〈sub〉2〈/sub〉, suggesting its potential practical applications under various circumstances.〈/p〉〈/div〉 〈h5〉Graphical abstract〈/h5〉 〈div〉〈p〉〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S0304389420301254-ga1.jpg" width="350" alt="Graphical abstract for this article" title=""〉〈/figure〉〈/p〉〈/div〉