Functional nMnOx@RBC composites were synthesized via a simple co-precipitation method. The nanomaterials have efficient activity in activating peroxymonosulfate (PMS) for removal of chlorophenols (CPs). Rice husk biochar (RBC) could support nMnOx, and acted as an electron shuttle to mediate electron transfer reaction. nMnOx@RBC had superior catalytic and adsorption properties and exhibited remarkable synergistic effects. This led to complete degradation of 4-chloro-3-methyl phenol (CMP) in 60 min at the natural pH (7.0). Reactive oxygen species (ROS) were also identified via the corresponding scavengers. The results indicated that singlet oxygen (¹O₂) played a dominant role in the degradation of CMP within nMnOx@RBC system. Moreover, the mechanism of CMP decomposition was rationally proposed, and possible intermediate products were deduced. The high degradation performances of diverse CPs were also observed in nMnOx@RBC/PMS system. This research aims to offer novel insights into carbon-metal nanomaterials for the elimination of emerging pollutants.

通过简单的共沉淀方法合成了功能性 nMnOx@RBC 复合材料。纳米材料在活化过硫酸盐 (PMS) 以去除氯酚 (CP) 方面具有有效的活性。稻壳生物炭 (RBC) 可以支持 nMnOx，并充当电子穿梭机以介导电子转移反应。nMnOx@RBC 具有优异的催化和吸附性能，并表现出显着的协同效应。这导致 4-氯-3-甲基苯酚 (CMP) 在自然 pH 值 (7.0) 下在 60 分钟内完全降解。还通过相应的清除剂鉴定了活性氧 (ROS)。结果表明单线态氧 ( ¹ O ₂) 在 nMnOx@RBC 系统中 CMP 的降解中起主导作用。此外，合理地提出了CMP分解的机理，并推导出可能的中间产物。在 nMnOx@RBC/PMS 系统中也观察到了不同 CP 的高降解性能。这项研究旨在为消除新兴污染物的碳金属纳米材料提供新的见解。