The use of castor oil and ricinoleic acid in lead chalcogenide nanocrystal synthesis

被引:0
|
作者
Kyobe, Joseph W. M. [1 ,2 ,3 ]
Mubofu, Egid B. [1 ]
Makame, Yahya M. M. [1 ]
Mlowe, Sixberth [2 ]
Revaprasadu, Neerish [2 ]
机构
[1] Univ Dar Es Salaam, Dept Chem, POB 35061, Dar Es Salaam, Tanzania
[2] Univ Zululand, Dept Chem, Private Bag X1001, ZA-3886 Kwa Dlangezwa, South Africa
[3] St Johns Univ Tanzania, Dept Chem, POB 47, Dodoma, Tanzania
基金
新加坡国家研究基金会;
关键词
Castor oil; Ricinoleic acid; Lead chalcogenide nanocrystals; Optical properties; Green synthesis;
D O I
10.1007/s40089-016-0189-4
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A green solution-based thermolysis method for the synthesis of lead chalcogenide (PbE, E = S, Se, Te) nanocrystals in castor oil (CSTO) and its isolate ricinoleic acid (RA) is described. The blue shift observed from the optical spectra of CSTO and RA-capped PbE nanocrystals (NCs) confirmed the evidence of quantum confinement. The dimensions of PbE NCs obtained from NIR absorption spectra, transmission electron microscopy (TEM), and X-ray diffraction (XRD) studies were in good agreement. The particle sizes estimated were in the range of 20, 25, and 130 nm for castor oil-capped PbS, PbSe, and PbTe, respectively. Well-defined close to cubic-shaped particles were observed in the scanning electron microscopy (SEM) images of PbSe and PbTe nanocrystals. The high-resolution TEM and selective area electron diffraction (SAED) micrographs of the as-synthesized crystalline PbE NCs showed distinct lattice fringes with d-spacing distances corroborating with the standard values reported in literature.
引用
收藏
页码:235 / 242
页数:8
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