TiO2 nanobelts/CdSSe quantum dots nanocomposite

被引:55
作者
Chong, Shen V.
Suresh, Narayanaswamy
Xia, James
Al-Salim, Najeh
Idriss, Hicham
机构
[1] Ind Res Ltd, Lower Hutt 5040, New Zealand
[2] Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6140, New Zealand
[3] Univ Auckland, Dept Chem, Auckland 1142, New Zealand
关键词
D O I
10.1021/jp072579u
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This work presents the successful noncovalent attachment of similar to 5 nm diameter cadmium-sulfur-selenium (CdSSe) quantum dots on strips of anatase TiO2 nanobelts. The TiO2 nanobelts were hydrothermally synthesized from a strong alkaline solution and subsequently heat-treated to achieve the anatase phase. The self-assembled-monolayer (SAM) technique was employed to attach the quantum dots onto the nanobelts. Due to the hydrophobic nature of the quantum dots, the surface of the nanobelts was first self-assembled with a layer of hydrophobic organic layer before both mixtures were added together. The resulting nanostructure assembly and composition was confirmed via transmission-electron-microscopy (TEM) imaging, Raman spectroscopy, UV-visible absorption spectroscopy (UV-vis), and X-ray photoelectron spectroscopy (XPS). Both Raman and UV-vis spectroscopies indicate evidence of interactions between the quantum dots and nanobelts. The visible-light sensitizing effect of the quantum dots was demonstrated in photocurrent experiments.
引用
收藏
页码:10389 / 10393
页数:5
相关论文
共 37 条
[1]   TiO2-B nanowires [J].
Armstrong, AR ;
Armstrong, G ;
Canales, J ;
Bruce, PG .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2004, 43 (17) :2286-2288
[2]   RAMAN-SPECTRA OF TITANIUM-DIOXIDE [J].
BALACHANDRAN, U ;
EROR, NG .
JOURNAL OF SOLID STATE CHEMISTRY, 1982, 42 (03) :276-282
[3]   Enhancement and limits of the photoelectrochemical response from anodic TiO2 nanotubes -: art. no. 243114 [J].
Beranek, R ;
Tsuchiya, H ;
Sugishima, T ;
Macak, JM ;
Taveira, L ;
Fujimoto, S ;
Kisch, H ;
Schmuki, P .
APPLIED PHYSICS LETTERS, 2005, 87 (24) :1-3
[4]   Bi2S3/TiO2 and CdS/TiO2 heterojunctions as an available configuration for photocatalytic degradation of organic pollutant [J].
Bessekhouad, Y ;
Robert, D ;
Weber, J .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 163 (03) :569-580
[5]   Photocatalytic synthesis of silver nanoparticles stabilized by TiO2 nanorods:: A semiconductor/metal nanocomposite in homogeneous nonpolar solution [J].
Cozzoli, PD ;
Comparelli, R ;
Fanizza, E ;
Curri, ML ;
Agostiano, A ;
Laub, D .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (12) :3868-3879
[6]   INFRARED AND RAMAN-STUDY OF WO3 TUNGSTEN TRIOXIDES AND WO3, XH2O TUNGSTEN TRIOXIDE HYDRATES [J].
DANIEL, MF ;
DESBAT, B ;
LASSEGUES, JC ;
GERAND, B ;
FIGLARZ, M .
JOURNAL OF SOLID STATE CHEMISTRY, 1987, 67 (02) :235-247
[7]   In situ infrared spectroscopic analysis of the adsorption of aliphatic carboxylic acids to TiO2, ZrO2, Al2O3, and Ta2O5 from aqueous solutions [J].
Dobson, KD ;
McQuillan, AJ .
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1999, 55 (7-8) :1395-1405
[8]   Anatase-TiO2 nanomaterials:: Morphological/size dependence of the crystallization and phase behavior phenomena [J].
Fernandez-Garcia, Marcos ;
Wang, Xianqin ;
Belver, Carolina ;
Hanson, Jonathan C. ;
Rodriguez, Jose A. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (02) :674-682
[9]   Determination of band edge energies for transparent nanocrystalline TiO2-CdS sandwich electrodes prepared by electrodeposition [J].
Flood, R ;
Enright, B ;
Allen, M ;
Barry, S ;
Dalton, A ;
Doyle, H ;
Tynan, D ;
Fitzmaurice, D .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 1995, 39 (01) :83-98
[10]   INITIAL AND FINAL-STATE EFFECTS IN ESCA SPECTRA OF CADMIUM AND SILVER-OXIDES [J].
GAARENSTROOM, SW ;
WINOGRAD, N .
JOURNAL OF CHEMICAL PHYSICS, 1977, 67 (08) :3500-3506