In order to obtain a robust, durable and efficient heterogeneous catalyst, macroscopic monolithic Zn-doped α-Fe₂O₃/graphene aerogel (GA) hybrid architecture with integrated morphology and hierarchically porous structure were controllably synthesized via a facile in-situ hydrothermal method and then used as persulfate (PS) activator for sulfamonomethoxine (SMM) wastewater purification. Several key reaction parameters including the initial SMM concentration, reaction temperature, coexisting inorganic anions and SMM in real natural water samples had different influence on the SMM removal efficiency. The catalytic efficiency of Zn-doped α-Fe₂O₃/GA with the molar ratio of Fe/Zn = 2:1.5 was about 66%, 62%, 66% and 11%∼33% higher than that of GA, α-Fe₂O₃/GA, Zn/GA and other Fe/Zn molar ratio. The improved activity of Fe/Zn = 2:1.5 benefits from the synergistic effects of the sp² hybridized carbon and porous framework, as well as the surface oxygenic functional groups, which accelerate the pollutant/oxidant dispersion and electron transfer. Electron paramagnetic resonance results indicate that OH, ¹O₂ and SO₄⁻ radicals account for the catalytic degradation of SMM and the activation of PS in present system is different from conventional homogeneous systems, and speculate mechanism was proposed based on the obtained data.

为了获得稳健、耐用和高效的多相催化剂，通过简便的原位水热法可控合成了具有综合形貌和分级多孔结构的宏观单片Zn掺杂α-Fe ₂ O ₃ /石墨烯气凝胶（GA）杂化结构。然后用作磺胺间甲氧嘧啶 (SMM) 废水净化的过硫酸盐 (PS) 活化剂。实际天然水样中的初始SMM浓度、反应温度、共存无机阴离子和SMM等几个关键反应参数对SMM去除效率的影响不同。Zn掺杂α-Fe ₂ O _{3的催化效率Fe/Zn摩尔比=2:1.5的/GA比GA、α-Fe 2} O ₃ /GA、Zn/GA等高出约66%、62%、66%和11%～33% Fe/Zn摩尔比。Fe/Zn = 2:1.5 的活性提高得益于 sp ²杂化碳和多孔骨架以及表面含氧官能团的协同作用，加速了污染物/氧化剂的分散和电子转移。电子顺磁共振结果表明OH、¹ O ₂和 SO ₄ ^-自由基对 SMM 的催化降解和 PS 在本系统中的活化作用不同于传统的均相系统，并根据获得的数据提出了推测机制。