h-BNNS的掺杂改性及其光催化性能  

Doping modification of h-BNNS and its photocatalytic properties

作　　者：代德钊 王若鹏 王赛 李文慧 韩雨荷 卢琼 安静[1,2] DAI Dezhao;WANG Ruopeng;WANG Sai;LI Wenhui;HAN Yuhe;LU Qiong;AN Jing(School of Sciences,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Hebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface,Shijiazhuang,Hebei 050018,China)

机构地区：[1]河北科技大学理学院,河北石家庄050018 [2]河北省表面和界面光电控制重点实验室,河北石家庄050018

出　　处：《河北科技大学学报》2024年第3期265-276,共12页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金(51203042);河北省高等学校科学技术研究项目(ZD2021321)。

摘　　要：为了发挥纳米贵金属与聚合物基体的协同光催化作用,采用RGO对六方氮化硼纳米片(h-BNNS)进行C元素、O元素掺杂,得到多孔掺杂氮化硼材料(BCNO),通过水热法将银纳米粒子(Ag NPs)负载在BCNO基体上制备BCNO/Ag复合材料,并对复合材料的组成、微观结构和光催化性能进行表征,以CO_(2)光催化还原为反应模型测试BCNO/Ag复合材料的光催化性能。结果表明:经过非金属掺杂改性后的氮化硼仍然具有稳定的多晶结构;负载Ag NPs后,Ag NPs的等离子共振效应不仅显著增强了BCNO基体对紫外-可见光的吸收能力,而且提高了光生载流子的分离效率;复合材料制备过程中,当银的加入量为3.0%、复合样品焙烧温度为130℃时,得到的复合材料具有最佳的光催化性能,CO_(2)还原成CO的转化率为4.68μmol/(g·h)。因此,通过掺杂改性后的h-BNNS能够更好地稳定负载纳米贵金属,充分发挥纳米银与BCNO两者的协同光催化性能,为有机-无机纳米光催化剂的有效复合及性能研究提供理论基础。In order to exert the synergistic photocatalytic effect of nano-noble metal and polymer matrix,hexagonal boron nitride nanosheets(h-BNNS)were doped with C and O elements by RGO to obtain porous doped boron nitride materials(BCNO),and silver nanoparticles(Ag NPs)were loaded on BCNO matrix by hydrothermal method to prepare BCNO/Ag composites.The composition,microstructure and photocatalytic properties of the composites were characterized.The photocatalytic properties of BCNO/Ag composites were tested by reducing CO_(2)to CO as a reaction model.The results show that boron nitride modified by nonmetal doping still has a stable polycrystalline structure;After loading Ag NPs,the plasma resonance effect of Ag NPs not only significantly enhances the absorption ability of BCNO matrix to ultraviolet-visible light,but also improves the separation efficiency of its photogenerated carriers;During the preparation of composite materials,the composite material obtained with the addition of 3.0%silver and the calcination temperature of the composite sample at 130℃exhibits the best photocatalytic performance,and the conversion rate of CO_(2)to CO is 4.68μmol/(g·h).Therefore,h-BNNS modified by doping can better stably load nano-precious metals,thus giving full play to the synergistic photocatalytic performance of Ag nanoparticle and BCNO,which provides a theoretical basis for the effective composite and performance research of organic-inorganic nanophotocatalyst.

关 键 词：聚合物基复合材料 氮化硼 纳米银 复合材料 光催化性能 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]