摘要
采用水热法和光沉积法成功制备了三元催化剂g-C_3N_4/Ag/α-FeOOH,利用红外光谱(IR)、X-射线衍射(XRD)和扫描电镜(SEM)表征了g-C_3N_4/Ag/α-FeOOH的组分、晶型和形貌,并研究了其对可见光下磺胺嘧啶(SD)的催化降解性能。结果表明:g-C_3N_4和α-FeOOH成功结合,贵金属Ag在α-FeOOH表面沉积;g-C_3N_4/Ag/α-FeOOH具有较多孔型和较大的比表面积,能有效提高对可见光的利用率。光催化SD实验表明,SD的光降解反应符合一级反应动力学;在500 W氙灯的模拟太阳光照射下,10mg·L^(-1)的g-C_3N_4和α-FeOOH单独对SD的降解促进率分别达到73.75%和68.80%;g-C_3N_4/Ag/α-FeOOH对SD的催化性能比g-C_3N_4和α-FeOOH都有明显提高,在投加量为10mg·L^(-1)时,达到最佳催化促进效果,降解促进率为107.50%。
We prepared three way catalyst g-C3N4/Ag/α-FeOOH successfully by a hydrothermal method and a photodeposition method,and characterized its component,crystal form,and morphology by IR,XRD,and SEM.Furthermore,we studied the photocatalytic degradation performance of g-C3N4/Ag/α-FeOOH to sulfadiazine(SD)under simulated visible light.The results show that g-C3N4 combines withα-FeOOH successfully,and the precious metal Ag deposits on the surface ofα-FeOOH.Moreover,g-C3N4/Ag/α-FeOOH hasrich porous structure and higher specific surface area,which can effectively improve the utilization of visible light.The photocatalytic SD experiment shows that the photodegradation of SD follows the first order reaction kinetics.Under the simulated sunlight of 500 W xenon lamp,the degradation rate of SD by g-C3N4 andα-FeOOH can reach 73.75%and 68.80%,respectively.The catalytic performance of g-C3N4/Ag/α-FeOOH to SD is significantly higher than that of g-C3N4 andα-FeOOH.The promotion rate can reach 107.50%,which is the most effective,when the dosage is 10 mg·L^-1.
作者
赵芙蓉
王飞
耿环环
韩晓敏
ZHAO Furong;WANG Fei;GENG Huanhuan;HAN Xiaomin(School of Energy&Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《化学与生物工程》
CAS
2019年第1期21-25,共5页
Chemistry & Bioengineering
基金
国家自然科学基金项目(41473096
41822706)
