铁基硼掺杂多孔炭催化降解双酚A的研究  

Catalytic degradation of bisphenol A by Fe@B-doped porous carbon

作　　者：万彦涛 张巍[1,2,3] 余淇 修光利 WAN Yantao;ZHANG Wei;YU Qi;XIU Guangli(National Environmental Protection Chemical Process Environmental Risk Assessment and Control Key Laboratory,School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237;Shanghai Key Laboratory of Environmental Standards and Risk Management of Chemical Pollutants,Shanghai 200237;Shanghai Institute of Pollution Control and Ecological Safety,Shanghai 200092)

机构地区：[1]国家环境保护化工过程环境风险评价与控制重点实验室,华东理工大学资源与环境工程学院,上海200237 [2]上海市环境保护化学污染物环境标准与风险管理重点实验室,上海200237 [3]上海污染控制与生态安全研究院,上海200092

出　　处：《环境污染与防治》2021年第12期1537-1542,1554,共7页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41201302);上海市自然科学基金资助项目(No.17ZR1407000)。

摘　　要：采用铁基金属有机骨架材料MIL-100(Fe)作为前驱体,外加硼源制备了铁基硼掺杂多孔炭(Fe@BPC),将其用于催化单过硫酸氢盐(PMS)降解水中双酚A(BPA),同时分析Fe@BPC的形貌结构,研究PMS浓度、催化剂投加量、初始pH等对降解效果的影响。结果表明,在催化剂投加量为0.10 g/L、PMS摩尔浓度为1.00 mmol/L、BPA为10 mg/L、初始pH=7的条件下,Fe@BPC对BPA的降解率为98.3%。在较宽的初始pH(3~11)范围内,Fe@BPC仍保持较好的催化活性,且4次循环后对BPA降解率仍可达95%以上。利用自由基淬灭实验和电子顺磁共振(EPR)技术对反应过程中产生的活性氧物质(ROS)进行了分析,结果表明,体系中可能同时存在SO_(4)-·、·OH、·O_(2)-和^(1)O_(2),共同对BPA的降解发挥作用。Fe@BPC中存在的Fe^(0)、铁氧化物、—BC_(2)O和—BCO_(2)是其具备良好催化活性的原因。Fe@B-doped porous carbon(Fe@BPC),prepared with iron-based metal-organic framework MIL-100(Fe)as precursors and external B source,was used to catalyze peroxymonosulfate to degrade bisphenol A(BPA)in water.The morphology and structure of the Fe@BPC were characterized,and the effects of PMS concentration,catalyst dosage,initial pH,etc.on the degradation of BPA were investigated.The results showed that the removal of BPA was 98.3%with 1.00 mmol/L PMS,0.10 g/L Fe@BPC,initial pH=7 and 10 mg/L BPA.Fe@BPC maintained a good catalytic activity in a wide range of the initial pH(3-11).Furthermore,the removal of BPA still reached 95%even the Fe@BPC were cycled for four consecutive runs.Based on the results of the radical queching and electron spin resonance experiments,SO_(4)-·,·OH,·O_(2)- and ^(1)O_(2) might coexist in the system and contribute to the degradation of BPA.The good catalytic performence of Fe@BPC was mainly attributed by the abundant Fe 0,iron oxide,—BC_(2)O and—BCO_(2).

关 键 词：铁基金属有机骨架材料 单过硫酸氢盐 硼掺杂 催化降解 双酚A 

分 类 号：X703[环境科学与工程—环境工程]