TiO_(2)/Pt/玉米秸秆碳微球复合材料对光催化分解水制氢性能的影响  

Effect of TiO_(2)/Pt/corn stalk carbon microsphere composites on performance of photocatalytic hydrogen production from water decomposition

作　　者：周云龙 孙萌[2] ZHOU Yun-long;SUN Meng(Minnan University of Science and Technology,Quanzhou 362242,China;Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]闽南理工学院,福建泉州362242 [2]东北电力大学,吉林吉林132012

出　　处：《现代化工》2023年第5期172-176,183,共6页Modern Chemical Industry

摘　　要：以玉米秸秆为原料,通过热熔法制备出TiO_(2)/Pt/玉米秸秆碳微球复合光催化剂。利用SEM、TEM、XRD、FT-IR、XPS、UV等方法对TiO_(2)/Pt/玉米秸秆碳微球进行表征。结果表明,TiO_(2)/Pt/玉米秸秆碳微球复合材料具有更高的光催化性能和光稳定性。在可见光照射、TiO_(2)/Pt与玉米秸秆碳微球质量比为1∶0.3时,光催化分解水制氢效率最高,达到1120μmol/(h·g),是TiO_(2)/Pt制氢量的56倍。修饰在TiO_(2)上的玉米秸秆碳微球具有良好的导电性,可促进TiO_(2)光生电子的转移。同时,碳微球的加入增大了复合光催化剂的比表面积,提高了光催化制氢效率,为新型生物质光催化体系提供新思路。TiO_(2)/Pt/corn stalk carbon microspheres composite photocatalyst is prepared through hot melt method.The structure,composition and properties of TiO_(2)/Pt/corn stalk carbon microsphere are characterized by means of SEM,TEM,XRD,FT-IR,XPS,UV,etc.The performance of the composite is evaluated in photocatalytic water decomposition to hydrogen.It is found that TiO_(2)/Pt/corn stalk carbon microsphere composite has higher photocatalytic performance and photostability.Under visible light irradiation and 1∶0.3 of mass ratio of TiO_(2)/Pt to corn stalk carbon microspheres,hydrogen production efficiency reaches the largest,being 1,120μmol·h^(-1)·g^(-1),which is 56 times that over TiO_(2)/Pt.Experimental and characterization results show that the corn stalk carbon microspheres modified on TiO_(2)have good conductivity and can promote the photogenerated electrons of TiO_(2)to transfer.Meanwhile,the addition of carbon microspheres increases the specific surface area of the composite photocatalyst,and improves the efficiency of photocatalytic hydrogen production,which provides a new idea for new biomass photocatalytic system.

关 键 词：玉米秸秆 牺牲剂 制氢 光催化 

分 类 号：O643[理学—物理化学] O613[理学—化学]