多级孔氮掺杂葡萄糖衍生碳的催化氧化应用  

Synthesis of hierarchical porous nitrogen doped carbon derived from glucose for catalytic oxidation

作　　者：王芳 杨哲 陈莹 彭文朝[2] WANG Fang;YANG Zhe;CHEN Ying;PENG Wenchao(School of Architecture and Art,Hebei University of Engineering,Handan 056009,Hebei,China;School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;Department of Chemical Engineering,Tianjin Renai College,Tianjin 301636,China)

机构地区：[1]河北工程大学建筑与艺术学院,河北邯郸056009 [2]天津大学化工学院,天津300350 [3]天津仁爱学院化工系,天津301636

出　　处：《精细化工》2023年第7期1553-1561,共9页Fine Chemicals

基　　金：天津市重点研发-科技支撑项目(20YFZCSN00610);国家自然科学基金(U20A20153)。

摘　　要：以葡萄糖为碳源、NaNO3为模板和造孔剂,通过高温炭化法以及NH3高温后处理合成了多级孔氮掺杂碳材料NC-X-T[X为NaNO3与葡萄糖的质量比,T为温度(℃)]。采用N2吸附-脱附、XRD、XPS、SEM、TEM对NC-X-T的比表面积、孔径分布、晶体结构、化学组成以及形貌进行了表征与测试。以NC-X-T为催化剂、过硫酸氢钾(PMS)为氧化剂,在不同条件下进行了苯酚的降解。结果表明,造孔和掺氮过程的协同可极大提升NC-X-T的催化性能。0.005 g NC-0.5-800及质量浓度1.0 g/L PMS在40 min内可将100 mL 5.3×10^(–4)mol/L苯酚完全降解,反应速率常数高达0.397 min^(–1),优于大多数金属及非金属催化剂。利用XPS对降解过程中NC-X-T的稳定性进行了研究,证实碳材料的氧化是其失活的主要原因,经过高温无氧处理可以恢复其部分催化活性。Hierarchically porous N-doped carbons(NC-X-T)[X represents mass ratio of NaNO3 to glucose,T is temperature(℃))were synthesized by high-temperature carbonation under N2 atmosphere and high temperature post-treatment with NH,with glucose as carbon precursor and NaNO3 as template and pore-forming material.The surface areas,pore size distribution,crystal structure,chemical composition,and morphologies of products obtained were analyzed by N2 adsorption-desorption,XRD,XPS,SEM and TEM.Then the catalytic performance of NC-X-T for phenol degradation was investigated using peroxymonosulfate(PMS)as oxidant.The results showed that the catalytic performance of NC-X-T was greatly improved by the synergistic effect of pore engineering and N-doping process.100 mL 5.3x10^(-4) mol/L phenol could be completely degraded by 0.005 g NC-0.5-800 and 1.0 g/L PMS within 40 min.The reaction rate constant could reach 0.397 min^(-1),which was superior to most metallic and non-metallic catalysts.Moreover,stability analysis by XPS indicated that oxidation was the main reason for the deactivation of NC-X-T,while the activity could be partially recovered by high temperature calcination under N2 atmosphere.

关 键 词：葡萄糖 硝酸钠 氮掺杂 多级孔碳 协同效应 过硫酸氢钾 苯酚催化降解 水处理技术 

分 类 号：X703[环境科学与工程—环境工程]