多孔Cu-CuO/HPTS复合材料的制备及其光催化性能

Preparation and Photocatalytic Properties of Porous Cu-CuO/HPTS Composites

采用多模板法制备了一种毫米级尺寸的分等级孔钛硅材料(HPTS),通过在HPTS表面还原Cu^(2+)制得Cu-CuO/HPTS复合光催化剂。用SEM、TEM、XRD、XPS、ICP、N_(2)吸附-脱附和电化学测试等技术对所制备材料的微观结构和形貌、组成和性质进行表征。结果表明,Cu-CuO/HPTS具有两套完整的三维连贯的大孔孔道,大孔孔壁由超薄的微-介孔纳米薄膜构成。HPTS兼具宏观材料和纳米材料的优点。HPTS在模拟太阳光下对罗丹明B(RhB)有着良好的光催化降解效果,负载Cu-CuO纳米颗粒以后,提高了材料的光生载流子分离效率,Cu-CuO/HPTS复合催化剂的光催化性能显著提升,表观速率常数k值达到0.52 h^(-1),是HPTS的2.4倍。整体型毫米级尺寸的Cu-CuO/HPTS光催化剂易于回收并且具有良好的稳定性,在经过5次循环使用后仍保留着良好的光催化活性。

A millimeter sized hierarchical porous titanium silicon material(HPTS)was prepared using a multi template method.Cu-CuO/HPTS composite photocatalyst was prepared by reducing Cu^(2+)on the surface of HPTS.The microstructure,morphology,composition,and properties of the prepared materials were characterized using techniques such as SEM,TEM,XRD,XPS,ICP,N_(2)adsorption desorption,and electrochemical testing.Results showed that Cu-CuO/HPTS had two complete sets of three-dimensional coherent macroporous channels,and the macroporous wall was composed of ultra-thin micro mesoporous nano films.HPTS had the advantages of both macro materials and nano materials.HPTS had a good photocatalytic degradation effect on Rhodamine B(RhB)under simulated sunlight.After loading Cu-CuO nanoparticles,the photocatalytic separation efficiency of the material was improved,and the photocatalytic performance of Cu-CuO/HPTS composite catalyst was significantly improved.The apparent rate at constant k reached 0.52 h^(-1),2.4 times that of HPTS.The monolithic millimeter sized Cu-CuO/HPTS photocatalyst was easy to recover and had good stability,and retains good photocatalytic activity after five cycles of use.