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Citation: LU Yong-Juan, JIA Jun-Hong. Preparation and Photoelectrical Properties of Bi2S3 Quantum Dots Sensitized TiO2 Nanorod-Arrays[J]. Chinese Journal of Inorganic Chemistry, ;2015, (6): 1091-1098. doi: 10.11862/CJIC.2015.155 shu

Preparation and Photoelectrical Properties of Bi2S3 Quantum Dots Sensitized TiO2 Nanorod-Arrays

  • 1.

    1 School of Chemical Engineering, Northwest University for Nationalities, Lanzhou 730030, China;

  • 2.

    2 State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

  • Corresponding author: LU Yong-Juan, 
  • Received Date: 14 October 2014
    Available Online: 11 March 2015

    Fund Project: 中央高校基本业务费专项资金项目(No.31920140083) (No.31920140083)引进人才教学科研启动费(No.xbmuyjrc1201204)资助项目。 (No.xbmuyjrc1201204)

  • Hydrothermally synthesized TiO2 nanorod arrays on FTO glass substrates were functionalized with uniform Bi2S3 quantum dots by CBD method combined with self-assembled monolayers(SAMs). The surface morphology, structure, optical and photoelectrochemical behaviors of the TiO2/Bi2S3 nanorod arrays are considered. The results that uniform Bi2S3 thin films were deposited on the surface of TiO2 nanorods modified by APTS SAMs. The key of the technology is that the APTS SAM possessing -NH2 functional groups can be employed to control nucleation. Moreover, the deposition time of Bi2S3 thin film plays a key role in the visible light absorption as well as photoelectric response of TiO2/Bi2S3 nanorod arrays. It reveals that, with the increase of the deposition time, the Jsc of composite thin film first increased and then decreased, and a Jsc maximum value of 0.13 mA·cm-2 reached at 20 min deposition of Bi2S3. The increase of Jsc for the initial deposition time could be interpreted as the result of enhanced absorption in the visible light range. Further increase the deposition time resulted in an obvious decrease in Jsc. This phenomenon might be attributed to Bi2S3 overloading on the surface of TiO2 resulted in aggregations and conglomerations, leading to more surface defects and recombination of photoexcited carrier.
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