文献类型：期刊文献

英文题名：Efficient PMS activation toward degradation of bisphenol A by metal-free nitrogen-doped hollow carbon spheres

作者：Di, Lu[1];Wang, Tong[1];Lu, Qinwei[1];Lu, Jinjie[1];Zhang, Yuting[1];Zhou, Yi[1,3];Zhou, Yanbo[1,2,3]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Minist Educ, Engn Res Ctr Resource Utilizat Carbon containing W, Shanghai 200237, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2024

卷号：339

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001186816500001)】；

基金：This work was supported by Program of Shanghai Outstanding Technology Leaders (Grant No. 20XD1433900) , the National Natural Science Foundation of China (Grant No. 52370168, 51778230) .

语种：英文

外文关键词：Nitrogen-doped; Peroxymonosulfates; Metal-free catalysts; Bisphenol A

摘要：Peroxymonosulfate (PMS) activation methods conventionally face challenges such as high energy consumption and the risk of metal leaching, limiting their practical application. Metal-free catalysts often face the problem of low catalytic activity. This study designed an in-situ nitrogen-doped hollow carbon catalyst (DNC-9), which offers balances efficient catalytic performance and metal-free catalysis. The results indicate that the DNC-9/PMS system effectively degrades bisphenol A, achieving complete degradation over a broad pH range (3.0-9.0). Through structure modification, the degradation efficiency of bisphenol A compared with SiO2@DNC-9/PMS system was improved by around 6 times and the degradation kinetic rate can reach 0.346 min-1. DNC-9 can activate PMS, resulting in a higher concentration of singlet oxygen without the generation of free radicals. Graphitic nitrogen in DNC-9 plays a crucial role in this activation, offering adsorption sites that facilitate decomposition of PMS and generating 1O2. In addition, graphitic nitrogen forms a transient active intermediate, DNC-9-PMS*, enhancing bisphenol A degradation. The catalyst recovers its high activity to complete bisphenol A removal with 15 min after thermal regeneration in cyclic experiments, demonstrating its potential as a practical solution for the efficient degradation of emerging contaminants.