深入了解 Co3O4 在 MOF 衍生的二元金属氧化物改性片状 g-C3N4 中用于光辅助过氧单硫酸盐活化的桥接作用,Environmental Science: Nano

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深入了解 Co3O4 在 MOF 衍生的二元金属氧化物改性片状 g-C3N4 中用于光辅助过氧单硫酸盐活化的桥接作用
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2022-10-26 , DOI: 10.1039/d2en00665k
Guangfu Wang _{1,

2} , Danlian Huang _{1,

2} , Min Cheng _{1,

2} , Sha Chen _{1,

2} , Gaoxia Zhang ₃ , Li Du _{1,

2} , Lei Lei _{1,

2} , Yashi Chen _{1,

2} , Ruijin Li _{1,

2} , Yang Liu _{1,

2}

Affiliation

氮化碳（gC ₃ N ₄）的利用不可避免地面临结构缺陷和光催化性能不足的问题。最近，金属有机骨架（MOF）衍生物掺杂已成为一种功能改变催化剂的方法。在此，我们合成了一种 MOF 衍生的二元金属氧化物 (ZnO/Co ₃ O ₄ /C) 改性的片状 gC ₃ N ₄ (ZCC-SCN) 催化剂一种水热过程与共热解方法相结合，并将其应用于光辅助过氧单硫酸盐（PMS）活化系统。热解衍生过程赋予ZCC-SCN更多的孔隙率和更大的表面积，有利于基材的界面吸附和反应性。我们在 MOF 衍生物中验证了由 Co ₃ O ₄ –gC ₃ N ₄和 ZnO–Co ₃ O ₄组成的独特三元异质结。更值得注意的是，增强的 Co ^III /Co ^II循环进一步支持 Co ₃ O ₄在协同光辅助 PMS 活化系统中的桥接作用。最后，SO ₄˙ ^-与生成的更多的 ˙O ₂^-结合在一起，共同驱动盐酸四环素的快速降解。我们的工作为碳基材料的 MOF 衍生物改性提供了新的视角，对光辅助 PMS 活化的研究具有重要意义。

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An insight into the bridging role of Co3O4 in MOF-derived binary metal oxide modified sheet-like g-C3N4 for photo-assisted peroxymonosulfate activation

The utilization of carbon nitride (g-C₃N₄) inevitably faces structural defects and inadequacy in photocatalytic performance. Recently, metal–organic framework (MOF) derivative doping has emerged as a way to functionally alter catalysts. Herein, we synthesize a MOF-derived binary metal oxide (ZnO/Co₃O₄/C)-modified sheet-like g-C₃N₄ (ZCC-SCN) catalyst via a hydrothermal process combined with a co-pyrolysis method and apply it in a photo-assisted peroxymonosulfate (PMS) activation system. The pyrolytic derivatization process endows ZCC-SCN with more porosity and larger surface area to favor the interfacial adsorption and reactivity of substrates. We validate a distinct ternary heterojunction composed of Co₃O₄–g-C₃N₄ and ZnO–Co₃O₄ in MOF derivatives. More notably, the enhanced Co^III/Co^II cycling further supports the bridging role of Co₃O₄ in the synergistic photo-assisted PMS activation system. Finally, SO₄˙⁻ coupled with the more generated ˙O₂⁻ dominates together to drive the rapid degradation of tetracycline hydrochloride. Our work provides a new perspective on the MOF derivative modification to carbon-based materials and is meaningful for the investigation of photo-assisted PMS activation.

更新日期：2022-10-26

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