以无机硫为原料制备硫化铅量子点及其表征

doi:10.3866/PKU.WHXB20110513

Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (05): 1239-1243.doi: 10.3866/PKU.WHXB20110513

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles Next Articles

Preparation of PbS Quantum Dots Using Inorganic Sulfide as Precursor and Their Characterization

YUE Dong^1,2, ZHANG Jian-Wen¹, ZHANG Jing-Bo², LIN Yuan²

1. Laboratory of Computational Fluid Dynamics and Heat Transfer, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
2. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China

Received:2011-01-14 Revised:2011-03-08 Published:2011-04-28
Contact: ZHANG Jian-Wen, ZHANG Jing-Bo E-mail:zhangjw@mail.buct.edu.cn; jbzhang@iccas.ac.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (20873162) and State Key Laboratory of Pollution Control and Resource Reuse Foundation of China (PCRRF09006).

Abstract

Abstract:

PbS semiconductor quantum dots with different particle sizes were successfully prepared by the colloidal chemistry method according to the theory of fast nucleation at high temperature and slow growth at low temperature. Sodium sulfide was used as a sulfur precursor because it is odorless and is less noxious, which allows it to be classified as a green precursor. Oleic acid was used as a stabilizing agent to control the particle growth and it thus assisted in the formation of monodisperse PbS quantum dots. The crystalline structures, morphology, and particle size of the quantum dots were characterized by powder X-ray diffraction and high-resolution transmission electron microscopy. The quantum size effect of the PbS nanoparticles was analyzed by visible near-infrared (Vis-NIR) absorption spectroscopy. The mean size of the PbS quantum dots increased with a decrease in the concentration of oleic acid. A possible growth mechanism for the PbS nanoparticles was also discussed.

Key words: Quantum dots, Lead sulfide, Sodium sulfide, Green synthesis, Size distribution

YUE Dong, ZHANG Jian-Wen, ZHANG Jing-Bo, LIN Yuan. Preparation of PbS Quantum Dots Using Inorganic Sulfide as Precursor and Their Characterization[J]. Acta Phys. -Chim. Sin. 2011, 27(05), 1239-1243. doi: 10.3866/PKU.WHXB20110513

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Preparation of PbS Quantum Dots Using Inorganic Sulfide as Precursor and Their Characterization

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