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| N/B/Fe共掺杂生物质炭阴极制备及电芬顿降解对硝基酚 | |
| 引用本文： | 汤茜,范艺馨,苏欣,黄成思,孙玉伟,高永慧,王栋.N/B/Fe共掺杂生物质炭阴极制备及电芬顿降解对硝基酚[J].化工进展,2021,40(7):4064-4073. |
| 作者姓名： | 汤茜 范艺馨 苏欣 黄成思 孙玉伟 高永慧 王栋 |
| 作者单位： | 吉林省高校环境材料与污染控制重点实验室,吉林四平136000;吉林师范大学环境科学与工程学院,吉林四平136000;吉林师范大学环境科学与工程学院,吉林四平136000;吉林省高校环境材料与污染控制重点实验室,吉林四平136000;大连理工大学环境学院,辽宁大连116024 |
| 基金项目： | 国家自然科学基金青年科学基金(51708250);国家级大学生创新创业训练计划支持项目(202010203001) |
| 摘 要： | 以玉米芯为主要原料，采用热沉积、高温焙烧法，制备N/B/Fe共掺杂生物质炭（N/B/Fe@BC），通过X射线衍射（XRD）、扫描电子显微镜（SEM）、高分辨透射电子显微镜（HRTEM）和X射线光电子能谱仪（XPS）等手段对样品的晶格结构、形貌特征和组成等进行表征，并以对硝基酚为对象，探究N/B/Fe@BC电极的电芬顿催化性能。结果表明，N/B/Fe@BC为纳米薄片交错堆积的三维多孔结构，表面缺陷较未掺杂生物质炭显著增加，催化氧还原以两电子产H2O2为主。在电流强度50mA、初始pH为3的电芬顿体系中，120min时对硝基酚的去除率为97.93%±1.62%，60min内反应速率常数k为0.040min-1，是未掺杂生物质炭电极的2.7倍。N/B/Fe@BC电极的pH适用范围较宽，受水质的影响较小，循环使用10次后120min对硝基酚的去除率仍可达到85%以上。 |
| 关 键 词： | N/B/Fe共掺杂 生物质炭 玉米芯 电芬顿 对硝基酚 |
| 收稿时间： | 2020-08-17 |
Preparation of N/B/Fe co-doped biochar cathode for degradation of p-nitrophenol |
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| TANG Qian,FAN Yixin,SU Xin,HUANG Chengsi,SUN Yuwei,GAO Yonghui,WANG Dong.Preparation of N/B/Fe co-doped biochar cathode for degradation of p-nitrophenol[J].Chemical Industry and Engineering Progress,2021,40(7):4064-4073. | |
| Authors: | TANG Qian FAN Yixin SU Xin HUANG Chengsi SUN Yuwei GAO Yonghui WANG Dong |
| Affiliation: | 1.Key Laboratory of Environmental Materials and Pollution Control, the Education Department of Jilin Province, Jilin Normal University, Siping 136000, Jilin, China 2.College of Environmental Science and Engineering, Jilin Normal University, Siping 136000, Jilin, China 3.School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China |
| Abstract: | N/B/Fe co-doped biochar (N/B/Fe@BC) was synthesized from corncob by thermal deposition and calcination. The crystal lattice structure, morphology, composition and other properties of the sample were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) and so on. The catalytic performance in electro-Fenton system with N/B/Fe co-doped cathode was investigated using p-nitrophenol as the model pollutant. The results showed that N/B/Fe@BC had a three-dimensional porous structure with staggered accumulation of nanosheets, and its surface defects were significantly increased compared with the undoped biochar. The catalytic oxygen reduction on the N/B/Fe@BC was dominated by the production of H2O2via two electrons reduction. The degradation rate of p-nitrophenol could reach 97.93%±1.62% in 120min with the current intensity of 50mA and initial pH of 3, and the apparent rate constant within 60min was 0.040min-1, which was 2.7 times higher than that of the undoped biochar cathode. The N/B/Fe@BC cathode expressed high activity in a wide pH range of 3—9 and feasibility in different water matrix including tap water, river water and municipal sewage. In addition, after ten times cycle, the degradation rate of p-nitrophenol could still reach more than 85% in 120min with the N/B/Fe@BC cathode. |
| Keywords: | N/B/Fe co-doped biochar corncob electro-Fenton p-nitrophenol |
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