CuO纳米颗粒修饰的TiO_(2)纳米管的制备及其性能研究

Preparation of CuO Nano-particle Modified TiO2 Nano-tube and its Performance Study

本研究采用水热法制备了CuO纳米颗粒修饰的TiO_(2)纳米管,采用XRD、ICP-MS、SEM、TEM及UV-Vis等手段,分析了TiO_(2)纳米管的基本物理特性,并将其应用于水解制氢反应中。基本物性分析表明,Cu掺杂对TiO_(2)的晶体结构没有明显的影响,CuO纳米颗粒可成功负载于TiO_(2)纳米管表面,其中Cu掺杂量为3wt%的样品,其结晶性最佳,且表面分布的CuO颗粒数量最为适当。在TiO_(2)纳米管表面负载适量的CuO颗粒,可将其吸收波段从紫外光区红移至可见光区,有效提升其光学活性。水解制氢的实验结果表明,经CuO颗粒修饰后,TiO_(2)纳米管的光催化性能得到大幅提升,其中Cu掺杂量为3wt%时,纳米管的H_(2)产率最高,可达47082μmol·g^(-1);Cu掺杂过量时,会因遮蔽效应而降低纳米管的光催化性能,但H_(2)的产率仍可提升约10倍。

CuO nano-particle modified TiO_(2) nano-tube was prepared by hydrothermal method and their basic physical properties were analyzed by XRD,ICP-MS,SEM,TEM and UV-Vis.The nano-tube was applied to hydrolysis hydrogen production reaction.The analysis of basic physical properties indicated that the crystal structure of TiO_(2) had not significantly effect by Cu doping and CuO nano-particle could be successfully loaded on the surface of TiO_(2) nano-tube.The sample had the best crystallinity and there were the most appropriate number of CuO nano-particle distributed on its surface when Cu doping amount was 3wt%.Simultaneously,loading an appropriate amount of CuO nano-particle on the surface of TiO_(2) nano-tube could shift their absorption band from the ultraviolet region to the visible region,effectively enhanced their optical activity.Hydrolysis hydrogen production analysis showed that the photo-catalytic performance of TiO2 nano-tube modified by CuO nano-particle was significantly improved and the highest H_(2) yield reached 47082μmol/g when the Cu doping amount was 3wt%.However,the photo-catalytic performance would be reduced due to the shielding effect when Cu doping was excessive,but the H_(2) yield could still be increased by about 10 times.