金纳米星/TiO_(2)/杯芳烃复合光催化材料的制备及可见光催化降解罗丹明B

Preparation,Characterization and Visible Light Photocatalytic Degradation Rhodamine B of Au Nanostar/TiO_(2)/Calixarene

先用各向异性的Au纳米星(AuNS)与TiO_(2)复合构筑金属-半导体异质核壳结构,再将硫杂杯[4]芳烃(STC[4]A)功能化于TiO_(2)/AuNS表面制得Au纳米星/TiO_(2)/杯芳烃(AuNS/TiO_(2)/STC[4]A)复合光催化材料,并通过紫外可见光谱(UV-Vis)、Fourier变换红外光谱(FT-IR)和扫描电子显微镜(SEM)等对材料进行表征,考察AuNS/TiO_(2)/STC[4]A对罗丹明B(RhB)的光催化降解活性.实验结果表明,AuNS/TiO_(2)/STC[4]A对RhB降解率可达99%,5次循环实验后,降解率仅降低1.8%.

Firstly,the metal-semiconductor heterogeneous core-shell structure was constructed by the combination of anisotropic gold nanostars(AuNS)and TiO_(2).Secondly,the sulfonatothiacalix[4]arene(STC[4]A)was functionalized on the surface of TiO_(2)/AuNS to prepare AuNS/TiO_(2)/calixarenes(AuNS/TiO_(2)/STC[4]A)composite photocatalytic materials.The materials were characterized by ultraviolet-visible spectrum(UV-Vis),Fourier transform infrared spectrum(FT-IR),scanning electron microscope(SEM),and the photocatalytic degradation activity of AuNS/TiO_(2)/STC[4]A for Rhodamin B(RhB)was investigated.The experimental results show that the degradation rate of Rhodamine B by AuNS/TiO_(2)/STC[4]A can reach 99%,after five cycles,the degradation rate only decreases by 1.8%.