The defects of titanium dioxide(TiO2) nanotubes,including the wider band gap and higher photogenerated electron-hole recombination rate,limit the utilization rate of photogenerated electrons.Therefore,the photocatalytic activity of nanotubes can be effectively improved by modification with semiconductors.Cu2O loaded TiO2 nanomaterials were prepared by drip-calcination method.A series of Cu2O/TiO2 nanotubes were prepared by changing the concentration of NaOH in the precursor solution.The characterizations shown that TiO2 nanotubes prepared by anodic oxidation possessed regular structure,and the micro-structure was not destroyed after modification.However,with the increase of loading amount,Cu2O particles on the surface of TiO2 nanotubes accumulated,the photogenerated current density increased firstly and then decreased with the increase of Cu2O loading amount.When the concentration of NaOH was 0.2mol/L,the photo-generated current density reached a maximum value (0.6mA/cm2).When the concentration of NaOH was 0.3mol/L,the Cu2O/TiO2 nanotubes had the best degradation effect on Rh B.
[1] Deng X Q,Liu J L,Li X S,et al.Kinetic study on visible-light photocatalytic removal of formaldehyde from air over plasmonic Au/TiO2[J].Catalysis Today,2017,281:630-635.
[2] 张敏.改性纳米TiO2的制备及其在染料敏化太阳能电池中的性能研究[D].青岛:青岛科技大学,2016.
[3] Nah Y C,Paramasivam I,Schmuki P.Doped TiO2 and TiO2 nanotubes:synthesis and applications[J].Chem Phys Chem,2010,11(13):2698-2713.
[4] Caruso F,Shi X,Caruso R A,et al.Hollow titania spheres from layered precursor deposition on sacrificial colloidal core particles[J].Advanced Materials,2001,13(10):740-744.
[5] Kim J,Sohn Y,Kang M.New fan blade-like core-shell Sb2TixSy photocatalytic nanorod for hydrogen production from methanol/water photolysis[J].International Journal of Hydrogen Energy,2013,38(5):2136-2143.
[6] Ren H,Sun J,Yu R,et al.Controllable synthesis of mesostructures from TiO2 hollow to porous nanospheres with superior rate performance for lithium ion batteries[J].Chemical Science,2016,7(1):793-798.
[7] 樊海梅,时玉帅,黄仁昆,等.硼修饰Bi-TiO2纳米球的制备及其光催化活性研究[J].福建师范大学学报(自然科学版),2018,34(3):47-51.
[8] 许亚兰,李丽娟,侯家麒,等.MnO2-TiO2多孔复合纳米材料的制备及光催化性能研究[J].武汉轻工大学学报,2018,37(4):42-44.
[9] Yuan Y J,Ye Z J,Lu H W,et al.Constructing anatase TiO2 nanosheets with exposed (001) facets/layered MOS2 two-dimensional nanojunctions for enhanced solar hydrogen generation[J].ACS Catalysis,2015,6(2):532-541.
[10] Pigeot-Rémy S,Simonet F,Errazuriz-Cerda E,et al.Photocatalysis and disinfection of water:identification of potential bacterial targets[J].Applied Catalysis B:Environmental,2011,104(3-4):390-398.
[11] 汤佳,钟世安,肖文.ZnO/TiO2纳米管的制备及光降解性能研究[J].化工新型材料,2010,38(8):84-87.
[12] Wang X Q,Cheng K,Dou S N,et al.Enhanced photoelectrochemical performance of CdO-TiO2 nanotubes prepared by direct impregnation[J].Applied Surface Science,2019,476:136-143.
[13] 张煜,刘兆阅,翟锦.Cu2O/TiO2纳米管阵列异质结的制备及其可见光光电响应性质[J].化学学报,2013,71(5):793-797.
