School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
Chemosphere. 2022 Sep;302:134832. doi: 10.1016/j.chemosphere.2022.134832. Epub 2022 May 4.
Carbon doped strategy has been recognized as an efficient strategy to enhance photo-Fenton degradation performance. However, the preparation of high efficiency C-doped photocatalyst has been a significant challenge. Herein, we synthesized magnetic carbon-doped ZnFeO via a facile solvothermal-calcination route. The photo-Fenton activity of C-doped ZnFeO under visible light (λ > 420 nm) was evaluated by degradation of tetracycline hydrochloride. C-doped sample, CZF-2 (0.5 g L) presented excellent removal performance for TC-HCl (20 mg L) in presence of HO (10 mM) and could remove 90.8% of TC-HCl within 50 min. The C-doping modulates crystal defects and generates surface oxygen vacancies simultaneously, thus building a new C-doping level near valence band and a defect level under the conduction band. Meanwhile, surface oxygen vacancies bring photo-generated electrons and electrons generated from itself to surface to accelerate photo-Fenton reaction, and the holes are rapidly transferred to the surface to participate in the degradation of pollutants.
碳掺杂策略已被认为是增强光芬顿降解性能的有效策略。然而，制备高效的 C 掺杂光催化剂一直是一个重大挑战。在此，我们通过简便的溶剂热-煅烧法合成了磁性碳掺杂 ZnFeO。通过降解盐酸四环素（TC-HCl）评价了 C 掺杂 ZnFeO 在可见光（λ>420nm）下的光芬顿活性。C 掺杂样品 CZF-2（0.5g·L）在 HO（10mM）存在下对 20mg·L 的 TC-HCl 表现出优异的去除性能，在 50min 内可去除 90.8%的 TC-HCl。C 掺杂同时调节了晶体缺陷并产生了表面氧空位，从而在价带附近和导带下方形成了新的 C 掺杂能级和缺陷能级。同时，表面氧空位将光生电子和自身产生的电子转移到表面，加速光芬顿反应，空穴则迅速转移到表面参与污染物的降解。
