Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China.
Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China.
J Environ Sci (China). 2023 Dec;134:11-20. doi: 10.1016/j.jes.2022.01.042. Epub 2022 Feb 9.
Photocatalytic Fenton reactions combined the advantages from both photocatalysis and Fenton reaction in mineralizing organic pollutants. The key problems are the efficiency and recycling stability. Herein, we reported a novel FeO/TiO/reduced graphene oxide (FTG) nanocomposite synthesized by a facile solvothermal method. The TiO in FTG degraded organic pollutants and mineralized intermediates via photocatalysis under visible light irradiation, which could also promote Fenton reaction by accelerating Fe-Fe recycle. Meanwhile, the FeO rapidly degraded organic pollutants via Fenton reactions, which also promoted photocatalysis by enhancing visible light absorbance and diminishing photoelectron-hole recombination. The high distribution of TiO and FeO on rGO, together with their strong interaction resulted in enhanced synergetic cooperation between photocatalysis and Fenton reactions, leading to the high mineralization efficiency of organic pollutants. More importantly, it could also inhibit the leaching of Fe species, leading to the long lifetime of FTG during photocatalytic Fenton reactions in a wide pH range from 3.4 to 9.2.
光芬顿反应结合了光催化和芬顿反应在矿化有机污染物方面的优势。关键问题是效率和循环稳定性。本文报道了一种通过简便的溶剂热法合成的新型 FeO/TiO/还原氧化石墨烯（FTG）纳米复合材料。FTG 中的 TiO 在可见光照射下通过光催化降解有机污染物和矿化中间产物，还可以通过加速 Fe-Fe 循环来促进芬顿反应。同时，FeO 通过芬顿反应快速降解有机污染物，也通过增强可见光吸收和减少光生载流子复合来促进光催化。rGO 上高分布的 TiO 和 FeO 以及它们之间的强相互作用增强了光催化和芬顿反应之间的协同合作，从而实现了有机污染物的高效矿化。更重要的是，它还可以抑制 Fe 物种的浸出，从而在 pH 值范围从 3.4 到 9.2 的宽范围内使 FTG 在光芬顿反应中具有长寿命。
