Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environment and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environment and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
J Hazard Mater. 2017 May 5;329:92-101. doi: 10.1016/j.jhazmat.2017.01.032. Epub 2017 Jan 22.
A new catalyst system of CoP/peroxymonosulfate (PMS) is presented, which achieved significant improvement in catalytic activity. Nanostructured CoP, obtained by a simple solid-state reaction, exhibited dramatic catalytic activity with 97.2% degradation of orange II of 100ppm within 4min. Moreover, the high efficiency could be reached for other phenolic pollutants, i.e., phenol and 4-chlorophenol. The reaction rate is much higher than the most reported catalysts. Effect of parameters on catalytic activity of the catalyst was studied in detail. Notably, initial pH of the solution had a slight negative effect on the catalytic performance over the pH range 4.07-10.92, suggesting that CoP has the great adaptability of pH. CoP/PMS demonstrated excellent anti-interference performance toward anions (Cl, NO, and HCO). In addition, the pathway of degradation of orange II is proposed by analyzing its intermediates. Based on the XPS spectra of CoP, the identification of the reactive species (OH and SO) by electron paramagnetic resonance (EPR) analysis and quenching tests, a possible mechanism for activation of PMS by CoP was proposed. Considering the dramatic catalytic activity, a wide range of pH catalyst suited, CoP is believed to provide robust support for the promising industrial application of AOPs.
一种新型的 CoP/过一硫酸盐（PMS）催化剂体系被提出，该体系显著提高了催化活性。通过简单的固态反应得到的纳米结构 CoP，在 4 分钟内对 100ppm 的橙色 II 的降解率达到了 97.2%，表现出了惊人的催化活性。此外，对于其他酚类污染物，如苯酚和 4-氯苯酚，也能达到高效去除的效果。该反应速率远高于大多数已报道的催化剂。详细研究了参数对催化剂催化活性的影响。值得注意的是，溶液的初始 pH 值在 4.07-10.92 的范围内对催化性能有轻微的负面影响，这表明 CoP 具有很强的 pH 适应性。CoP/PMS 对阴离子（Cl、NO 和 HCO）表现出优异的抗干扰性能。此外，通过分析中间产物，提出了橙色 II 的降解途径。基于 CoP 的 XPS 光谱、电子顺磁共振（EPR）分析和猝灭试验中活性物质（OH 和 SO）的鉴定，提出了 CoP 活化 PMS 的可能机制。考虑到其显著的催化活性和较宽的 pH 适用范围，CoP 有望为 AOPs 的有前途的工业应用提供有力支持。
