Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
J Hazard Mater. 2023 Jun 5;451:131102. doi: 10.1016/j.jhazmat.2023.131102. Epub 2023 Feb 28.
A novel S-scheme photocatalyst BiMoO @doped gCN (BMO@CN) was prepared through a facile microwave (MW) assisted hydrothermal process and further employed to degrade Amoxicillin (AMOX), by peroxymonosulfate (PMS) activation with visible light (Vis) irradiation. The reduction in electronic work functions of the primary components and strong PMS dissociation generate abundant electron/hole (e/h) pairs and SO,*OH,Oreactive species, inducing remarkable degeneration capacity. Optimized doping of BiMoO on doped gCN (upto 10 wt%) generates excellent heterojunction interface with facile charge delocalization and e/h separation, as a combined effect of induced polarization, layered hierarchical structure oriented visible light harvesting and formation of S-scheme configuration. The synergistic action of 0.25 g/L BMO(10)@CN and 1.75 g/L PMS dosage can degrade 99.9% of AMOX in less than 30 min of Vis irradiation, with a rate constant (k) of 0.176 min. The mechanism of charge transfer, heterojunction formation and the AMOX degradation pathway was thoroughly demonstrated. The catalyst/PMS pair showed a remarkable capacity to remediate AMOX-contaminated real-water matrix. The catalyst removed 90.1% of AMOX after five regeneration cycles. Overall, the focus of this study is on the synthesis, illustration and applicability of n-n type S-scheme heterojunction photocatalyst to the photodegradation and mineralization of typical emerging pollutants in the water matrix.
一种新型 S 型光催化剂 BiMoO@掺杂 gCN（BMO@CN）通过简便的微波（MW）辅助水热法制备，并进一步通过可见光（Vis）辐照过一硫酸盐（PMS）活化来降解阿莫西林（AMOX）。主要成分的电子功函数降低和强 PMS 解离产生了丰富的电子/空穴（e/h）对和 SO,*OH,Oreactive 物质，诱导了显著的降解能力。BiMoO 在掺杂 gCN 上的优化掺杂（高达 10wt%）产生了具有易电荷离域和 e/h 分离的优异异质结界面，这是诱导极化、层状分级结构导向可见光吸收和 S 型构型形成的综合效应。0.25g/L BMO（10）@CN 和 1.75g/L PMS 剂量的协同作用可在 Vis 照射不到 30 分钟内降解 99.9%的 AMOX，速率常数（k）为 0.176min。电荷转移、异质结形成和 AMOX 降解途径的机制得到了彻底的证明。催化剂/PMS 对具有显著的修复 AMOX 污染实际水基质的能力。催化剂在五个再生循环后去除了 90.1%的 AMOX。总的来说，本研究的重点是 n-n 型 S 型异质结光催化剂的合成、说明和适用性，以用于水基质中典型新兴污染物的光降解和矿化。
