南昌航空大学邹建平团队报道了纳米花FeS/MoS₂复合材料作为过氧单硫酸盐活化剂高效降解对氯苯酚。相关研究成果发表在2025年2月7日出版的国际知名学术期刊《结构化学》。

水中有机污染物的降解是一个关键的环境挑战。铁掺杂的MoS₂催化剂在活化过氧单硫酸盐（PMS）用于环境修复方面具有潜力，但它们面临着导电性差、电子转移效率有限和活性位点稀缺等挑战。

为了解决这些问题，研究人员成功合成了由多金属氧酸盐(NH₄)₃[Fe(III)Mo₆O₂₄H₆]·6H₂O（表示为FeMo₆）作为双金属前驱体衍生的纳米花FeS/MoS₂复合材料。这种合成策略增强了FeS和MoS₂之间的相互作用，从而促进了电子转移。值得注意的是，FeS/MoS₂中硫空位的引入暴露了额外的Mo⁴⁺活性位点，促进了Fe²⁺/Fe³⁺的氧化还原循环，加速了Fe²⁺的再生，从而增强了PMS的活化。

因此，研究提出了一种FeS/MoS₂/PMS的催化氧化系统，该系统主要依赖于SO₄^•-和•OH，以¹O₂作为补充氧化剂。该系统对对对氯酚（4-CP）表现出卓越的降解效率，在2.4至8.4的宽pH范围内，可在10分钟内实现100%的降解。FeS/MoS₂催化剂的稳健性能和广泛适用性使其成为环境修复高级氧化过程（AOPs）中有前景的候选者。

附：英文原文

Title: Nano-flowers FeS/MoS2 composites as a peroxymonosulfate activator for efficient p-chlorophenol degradation

Author: Xian-Rui Meng, Qian Chen, Mei-Feng Wu, Qiang Wu, Su-Qin Wang, Li-Ping Jin, Fan Zhou, Ren-Li Ma, Jian-Ping Zou

Issue&Volume: 2025-02-07

Abstract: The degradation of organic pollutants in water is a critical environmental challenge. The iron-doped MoS2 catalysts have demonstrated potential in activating peroxymonosulfate (PMS) for environmental remediation, but they face challenges such as poor conductivity, limited electron transfer efficiency, and a scarcity of active sites. To address these issues, we successfully synthesized a nano-flowers FeS/MoS2 composite derived from polyoxometalates (NH4)3[Fe(III)Mo6O24H6]·6H2O (denoted as FeMo6) as the bimetallic precursors. This synthesis strategy enhances the interaction between FeS and MoS2, thereby facilitating electron transfer. Notably, the introduction of sulfur vacancies in FeS/MoS2 exposes additional Mo4+ active sites, facilitating the redox cycle of Fe2+/Fe3+ and accelerating the regeneration of Fe2+, which in turn enhances PMS activation. Therefore, a catalytic oxidation system of FeS/MoS2/PMS is presented that primarily relies on SO4- and OH, with 1O2 as a supplementary oxidant. This system exhibits exceptional degradation efficiency for p-chlorophenol (4-CP), achieving 100% degradation within 10 minutes over a wide pH range of 2.4 to 8.4. The robust performance and wide applicability of FeS/MoS2 catalyst make it a promising candidate in advanced oxidation processes (AOPs) for environmental remediation.

DOI: 10.1016/j.cjsc.2025.100543

Source: http://cjsc.ac.cn/cms/issues/765