g-C_(3)N_(4)负载磷钨酸及其光催化固氮性能的研究  

Preparation of g-C_(3)N_(4) loaded phosphotungstic acid and its performance in photocatalytic nitrogen fixation

作　　者：张双双 田跃儒 ZHANG Shuang-shuang;TIAN Yue-ru(CNOOC EnerTech-Drilling&Production Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海石油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《现代化工》2021年第8期203-207,共5页Modern Chemical Industry

摘　　要：通过石墨相氮化碳(g-C_(3)N_(4))负载磷钨酸(HPW)制备一系列催化剂x Hg-C_(3)N_(4)。并利用FT-IR、XRD、SEM、UVVis、PL光谱对催化剂进行表征。结果显示,负载磷钨酸(HPW)并未改变石墨相氮化碳(g-C_(3)N_(4))的结构,且能有效降低光生电子空穴的复合几率及带隙能。通过光照下固氮反应对催化剂的反应活性进行考察。结果表明,当负载磷钨酸(HPW)质量分数为1.5%时达到最佳的催化活性,在1 h光照下产铵离子率为6.7 mg/(L·h),是g-C_(3)N_(4)的20.9倍。A series of x Hg-C_(3)N_(4)catalysts are prepared through loading phosphotungstic acid(HPW)by graphitephase carbon nitride(g-C_(3)N_(4)),and characterized by means of FT-IR spectra,XRD,SEM,UV-Vis,PL spectra.The results show that the loading of phosphotungstic acid(HPW)does not change the structure of graphite-phase g-C_(3)N_(4),and can effectively reduce the recombination probability of photogenerated electron holes and the band gap energy.The reaction activity of the catalysts is evaluated through catalyzing nitrogen fixation reaction under light.Results show that the catalyst has the optimal activity when the loading amount of phosphorotungstate is 1.5%.The yield of ammonium ion over the optimal catalyst can reach 6.7 mg/(L·h)after 1 h of illumination,which is 20.9 times that over g-C_(3)N_(4).

关 键 词：g-C_(3)N_(4) 磷钨酸负载 光催化 固氮反应 

分 类 号：TQ63[化学工程—精细化工]