以玉米秸秆为原料,通过热熔法制备出TiO₂/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TiO₂/Pt/玉米秸秆碳微球进行表征。结果表明,TiO₂/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、TiO₂/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1 120 μmol/(h·g),是TiO₂/Pt制氢量的56倍。修饰在TiO₂上的玉米秸秆碳微球具有良好的导电性,可促进TiO₂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。

TiO₂/Pt/corn stalk carbon microspheres composite photocatalyst is prepared through hot melt method.The structure,composition and properties of TiO₂/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 TiO₂/Pt/corn stalk carbon microsphere composite has higher photocatalytic performance and photostability.Under visible light irradiation and 1:0.3 of mass ratio of TiO₂/Pt to corn stalk carbon microspheres,hydrogen production efficiency reaches the largest,being 1,120 μmol· h^-1·g^-1,which is 56 times that over TiO₂/Pt.Experimental and characterization results show that the corn stalk carbon microspheres modified on TiO₂ have good conductivity and can promote the photogenerated electrons of TiO₂ 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.

周云龙(1960-),男,博士,教授,研究方向为能源化工,ylzhou@neepu.edu.cn。