均匀分散的纳米银/介孔氮化碳复合微粒的协同光催化性能研究  

Research of synergistic photocatalytic properties of silver/mesoporous carbon nitride nanocomposite particles with uniform dispersion

作　　者：米贺 安静[1] 陈韶蕊[1] 殷蓉[1] 闫徐冬 刘怡维 王德松[1,2] MI He;AN Jing;CHEN Shaorui;YIN Rong;YAN Xudong;LIU Yiwei;WANG Desong(School of Science,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;State Key Lab of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao,Hebei 066004,China)

机构地区：[1]河北科技大学理学院,河北石家庄050018 [2]燕山大学亚稳态材料科学与技术国家重点实验室,河北秦皇岛066004

出　　处：《河北科技大学学报》2020年第1期14-22,共9页Journal of Hebei University of Science and Technology

基　　金：河北省自然科学基金(E2016208030)

摘　　要：为了有效还原污染水中的硝基化合物和光解水制氢,采用浸渍法制备纳米银/介孔石墨相氮化碳(Ag/mp g-C3N4)复合微粒,继而通过简单吸附法制备Ag/5-OH-ZnTPP/mp g-C3N4复合微粒,利用BET,SEM,XRD和XPS等表征方法对所制备复合微粒的形貌、微观结构和组成进行测试,结果显示,介孔石墨相氮化碳(mp g-C3N4)呈多孔片层状,纳米银粒子(AgNPs)均匀分散于mp g-C3N4表面及片层间。通过UV-vis DRS,PL和PT等表征方法对Ag/5-OH-ZnTPP/mp g-C3N4复合微粒的光电性能进行测试,结果表明,AgNPs的引入和锌卟啉的表面敏化作用提高了mp g-C3N4基体对可见光的利用率。选用对硝基苯酚还原和光解水制氢为模型反应,经贵金属沉积改性及锌卟啉表面敏化改性后显著提高了mp g-C3N4基体的光催化活性。因此,Ag/5-OH-ZnTPP/mp g-C3N4复合微粒对4-NP的还原反应及光解水制氢具有高效催化活性。In order to effectively reduce nitro compounds in contaminate water and produce hydrogen from water,Ag/mp g-C3N4 nanocomposite particles are prepared by impregnation method,and 5-OH-ZnTPP is loaded on the surface of Ag/mp g-C3N4 to prepare Ag/5-OH-ZnTPP/mp g-C3N4 composite particles.The morphology,microstructure and composition of as-prepared nanocomposite particles are characterized by BET,SEM,XRD and XPS.The results show that the mp g-C3N4 is lamellar structure with porous,while the silver nanoparticles are dispersed on the surface or between the lamellar of the mp g-C3N4.The photoelectric property of the Ag/5-OH-ZnTPP/mp g-C3N4 nanocomposite particles is also characterized by UV-vis DRS,PL and PT,respectively.The results reveal that the visible-light utilization of mp g-C3N4 are improved by the introduction of silver nanoparticles and the sensitization of porphyrin.The catalytic activities are examined by using the reduction of 4-NP and the photocatalytic H2 production as model reactions,which demonstrates that the photocatalytic activity of mp g-C3N4 is enhanced after modified by silver nanoparticles and sensitized with dye porphyrins.Ag/5-OH-ZnTPP/mp g-C3N4 nanocomposite particles have high catalytic activity for the reduction of 4-NP and hydrogen production.

关 键 词：催化化学 多孔石墨相氮化碳 纳米银 光解水制氢 锌卟啉 对硝基苯酚 

分 类 号：O643.3[理学—物理化学]