双氮源法调控氮化硼孔结构及其吸附性能  

Dual nitrogen source assisted method for regulating pore structure and adsorption performance of boron nitride

作　　者：王延庆 施萍 张世豪 刘峰 吴玉胜[1] 李来时 WANG Yanqing;SHI Ping;ZHANG Shihao;LIU Feng;WU Yusheng;LI Laishi(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《中国有色金属学报》2025年第3期940-953,共14页The Chinese Journal of Nonferrous Metals

基　　金：辽宁省科技厅联合基金资助项目(2023-BSBA-260);辽宁省教育厅资助项目(LJ212410142055)。

摘　　要：抗生素等药物化合物在环境中的转归及其去除已成为全球水污染治理领域中的热点问题。六方氮化硼(h-BN)是一种新型吸附剂,可用于对被污染水体中的四环素(TC)进行选择吸附。本研究通过“双氮源法”调控氮化硼孔径结构,成功制备出具有多级孔结构的h-BN。通过吸附动力学和平衡吸附等温线研究了多孔h-BN对TC的吸附机理,并通过TEM、Raman、XPS等分析技术表征了样品的形貌和物理化学性质,系统地讨论了h-BN多级孔结构对其吸附性能的影响机制。结果表明:通过控制双氮源释放气体的时间与频率,在BN结构中掺杂C、O元素,制得具有多级孔径结构的氮化硼纳米片。当硼酸、三聚氰胺和尿素的摩尔比为1∶1∶5时,合成的多孔h-BN的吸附累积介孔和大孔内表面积为1807.9 m^(2)/g,对四环素的吸附量达到231.3 mg/g,表明其对四环素等药物分子具有较高的去除效果,且其具有良好的循环性和稳定性,经5次循环后,吸附量仅下降11%。The removal of antibiotic and other pharmaceutical compounds in the environment has become a hot issue in the field of global water pollution control.Porous hexagonal boron nitride(h-BN),as an emerging adsorbent,can be used for selective adsorption of tetracycline(TC)in contaminated water bodies.In this study,the pore size structure of boron nitride was modulated by the“dual nitrogen source assisted method”.The h-BN product with hierarchically porous structure was successfully synthesized.Through adsorption kinetics and equilibrium adsorption isotherms,the adsorption mechanism of porous h-BN toward TC was investigated.The morphology and physicochemical properties of the samples were characterized by analytical techniques such as TEM,Raman,XPS and so on.And the influence mechanisms of thehierarchically porous structure on the adsorption performance of h-BN were also systematically discussed.The results show that,by controlling the released time and frequency of gas originated from the dual-nitrogen source,carbon(C)and oxygen(O)elements were doped into the BN structure,successfully obtaining hierarchically porous boron nitride nanosheets.Fixing the molar ratio of boric acid,melamine,and urea at 1∶1∶5,the synthesized porous h-BN exhibits a cumulative mesopore and macropore specific surface area of 1807.9 m^(2)/g and achieves a TC adsorption capacity of 231.3 mg/g.It is demonstrated that porous BN possesses a high removal efficiency on drug moleculeslike tetracycline.And the adsorption capacity only decreases by 11%after 5 cycles,indicating the excellent recyclability and stability of porous h-BN.

关 键 词：多孔六方氮化硼 原子掺杂 吸附 环境修复 

分 类 号：TQ128[化学工程—无机化工]