Schwertmannite (sch), an iron oxyhydrosulfate mineral, can catalyse a Fenton-like reaction to degrade organic contaminants, but the reduction of Fe(III) to Fe(II) on the surface of schwertmannite is a limiting step for the Fenton-like process. In the present study, the sch/few-layer graphene (sch–FLG) composite was synthesized to promote the catalytic activity of sch in a Fenton-like reaction. It was found that sch can be successfully carried by FLG in sch–FLG composite, mainly via the chemical bond of Fe–O–C on the surface of sch–FLG. The sch–FLG exhibited a much higher catalytic activity than sch or FLG for the degradation of sulfamethazine (SMT) in the heterogeneous Fenton-like reaction, which resulted from the fact that the FLG can pass electrons efficiently. The degradation efficiency of SMT was around 100% under the reaction conditions of H₂O₂ 200–500 mg l⁻¹, sch–FLG dosage 1–2 g l⁻¹, temperature 28–38°C, and initial solution pH 1–9. During the repeated uses of sch–FLG in the Fenton-like reaction, it maintained a certain catalytic activity for the degradation of SMT and the mineral structure was not changed. In addition, SMT may be finally mineralized in the Fenton-like reaction catalysed by sch–FLG, and the possible degradation pathways were proposed. Therefore, the sch–FLG is an excellent catalyst for SMT degradation in a heterogeneous Fenton-like reaction.

Schwertmannite（sch）是一种含氧氢硫酸铁矿物，可以催化Fenton样反应降解有机污染物，但是在Schwertmannite表面上将Fe（III）还原为Fe（II）是类Fenton工艺的限制步骤。在本研究中，合成了sch /几层石墨烯（sch–FLG）复合材料，以增强sch在Fenton样反应中的催化活性。已经发现，FLG可以成功地在sch–FLG复合材料中携带sch，主要是通过sch–FLG表面上的Fe–O–C的化学键实现的。sch-FLG在异质Fenton样反应中对磺胺二甲嘧啶（SMT）的降解具有比sch或FLG更高的催化活性，这是由于FLG可以有效地使电子通过。H反应条件下SMT的降解效率约为100％₂ O ₂ 200–500 mg l ^-1，sch–FLG剂量1-2 gl ^-1，温度28–38°C，初始溶液pH值1-9。在Fenton样反应中重复使用sch–FLG时，它对SMT的降解保持了一定的催化活性，并且矿物结构没有改变。此外，SMT可能最终在sch–FLG催化的Fenton样反应中矿化，并提出了可能的降解途径。因此，sch-FLG是异质Fenton样反应中SMT降解的极佳催化剂。