g-C_3N_4负载Ni(Ⅱ)配合物对光催化产氢效率研究  

Study on Photocatalytic Hydrogen Production Efficiency of g-C_3N_4 Supported Ni(Ⅱ) Complex

作　　者：刘东升 杨海霞 孙薪博 冯文爽 朱明昌 高恩军 LIU Dong-sheng;YANG Hai-xia;SUN Xin-bo;FENG Wen-shuang;ZHU Ming-chang;GAO En-jun(Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学辽宁省无机分子基化学重点实验室,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2018年第4期318-322,共5页Journal of Shenyang University of Chemical Technology

基　　金：国家自然科学基金资助项目(21671138;U1608224)

摘　　要：以类石墨碳化氮(g-C_3N_4)为前体,选用双(4-吡啶)胺有机配体(L)采用加热回流法成功制得Ni(Ⅱ)配合物(Ni-L),通过化学浸渍法合成Ni-L/g-C_3N_4复合光催化剂,并改变Ni-L的负载量得到不同质量配比的Ni-L/g-C_3N_4复合光催化剂.使用X射线衍射仪(XRD)、扫描电子显微镜(TEM)和荧光光谱仪表征所获得的g-C_3N_4和Ni-L/g-C_3N_4复合光催化剂.通过模拟太阳光光源照射,三乙醇胺作为牺牲剂的反应条件下分解水析出氢气的效率来评价制备的复合光催化剂的光催化活性. Ni-L负载量为5%(质量分数)的Ni-L/g-C_3N_4复合光催化剂在模拟太阳光光照6 h分解水产生氢气的量为63. 47μmol,速率为319. 4μmol·h-1·g-1,与纯相g-C_3N_4相比,极大地增加了析出氢气的量.基于XRD、TEM和荧光光谱谱图说明复合材料的表面结构不同,微观形貌也发生明显变化,同时降低了光生载流子的复合速率.结果表明,将Ni-L负载在g-C_3N_4上可大大提高g-C_3N_4的光催化活性.Ni(Ⅱ)complex(Ni-L)was successfully prepared by heat-reflux method using graphite-like carbonitride nitrogen(g-C3N4)as precursor and bis(4-pyridine)amine organic ligand(L).Ni-L/g-C3N4composite photocatalyst was synthesized by synthesizing Ni-L/g-C3N4composite photocatalyst and changing the loading of Ni-L.The obtained g-C3N4and Ni-L/g-C3N4composite photocatalysts were characterized using X-ray diffraction(XRD),transmission electron microscope(TEM),and fluorescence spectrometer.The photocatalytic activity of the prepared composite photocatalyst was evaluated by simulating the sunlight light source irradiation and the efficiency of decomposing water to decompose hydrogen under the reaction conditions of triethanolamine as a sacrificial agent.Ni-L/g-C3N4composite photocatalyst with a Ni-L loading of5%(mass fraction)produced63.47μmol of hydrogen in a simulated solar light for6hours at the rate of319.4μmol h^-1g^-1.Compared with the pure phase g-C3N4,the amount of hydrogen evolved is greatly increased.Based on the results of XRD,TEM and fluorescence spectra,the surface structure of the composites is different,and the microscopic morphology also changed significantly,and the recombination rate of photogenerated carriers was reduced.The results showed that the photocatalytic activity of g-C3N4can be greatly improved by loading Ni-L on g-C3N4.

关 键 词：g-C3N4 配合物 复合光催化剂 光催化制氢 

分 类 号：TQ032.41[化学工程]