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首页> 外文期刊>Catalysis science & technology >Carbon fiber-assisted iron carbide nanoparticles as an efficient catalyst via peroxymonosulfate activation for organic contaminant removal
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Carbon fiber-assisted iron carbide nanoparticles as an efficient catalyst via peroxymonosulfate activation for organic contaminant removal

机译：碳fiber-assisted碳化铁纳米颗粒通过peroxymonosulfate作为一种高效的催化剂激活对有机污染物的去除

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摘要

The development of efficient and environment-benign catalytic materials to activate peroxymonosulfate (PMS) for refractory pollutant removal has been considered as an attractive yet challenging topic in the field of wastewater treatment. Herein, carbon fiber-assisted iron carbide (Fe3C@CFs) was innovatively prepared by a hydrothermal and calcination method. Fe3C@CFs could activate PMS and remove the pollutant Acid Red 1 (AR1) up to 97.3%, and even the rate constant was 12.4 times higher than that of Fe3C. The leaching of iron ions was only 0.002 ppm, which was extremely lower than the European standard. Furthermore, Fe3C@CFs still exhibited a favorable catalytic performance after 4 cycles. The catalytic mechanism was investigated by a hybrid method of various radical scavengers combined with electron spin resonance, suggesting that O-1(2) served as the main reaction oxidation species rather than OH or SO4- during the catalytic process, different from most of the reported radical paths for activating PMS. In addition, Fe3C@CFs possessed wide pH adaptability (3-10) and relatively low activation energy (24.47 kJ mol(-1)) for AR1 removal. These findings pave a promising avenue to develop highly efficient and eco-friendly catalytic materials for environmental remediation.
机译：高效的发展environment-benign催化材料激活peroxymonosulfate (PMS)耐火材料污染物去除已被视为一个领域的吸引力还富有挑战性的课题废水处理。fiber-assisted碳化铁(Fe3C@CFs)创新由热液和准备煅烧的方法。并去除污染物酸红1 (AR1)97.3%,甚至速率常数为12.4倍高于Fe3C。离子只有0.002 ppm,非常低于欧洲标准。Fe3C@CFs仍表现出良好的催化4周期后性能。机制是一个混合的方法调查各种激进的食腐动物与电子相结合自旋共振,这表明,1(2)担任主要的反应而不是氧化物种哦,在催化过程中或SO4 -,不同于大部分的报道激进的路径激活经前综合症。拥有广泛的适应性(3 - 10)和pH值相对较低的活化能(24.47 kJ摩尔(1))AR1去除。开发高效的通途环保催化材料环境修复。

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