Jump to main content
Jump to site search

Issue 34, 2015
Previous Article Next Article

Direct synthesis of size-tunable PbS nanocubes and octahedra and the pH effect on crystal shape control

Author affiliations

Abstract

A one-pot synthesis for the growth of PbS nanocubes and octahedra has been developed by heating an aqueous mixture of cetyltrimethylammonium bromide (CTAB), thioacetamide (TAA), lead acetate, and nitric acid at 90 °C for 3 h. The method allows for direct large-scale production of small and uniform PbS nanocubes. The PbS cubes and octahedra exhibit different surface properties, as evidenced by zeta potential measurements and stability tests in methyl orange and methylene blue solutions. Examination of the reagent introduction sequence indicates that early or late addition of nitric acid to tune the initial solution pH can strongly influence crystal growth rate and result in the formation of PbS crystals with different sizes and shapes. Remarkably, the use of pre-formed PbS nanocubes for further crystal growth under low TAA concentration can transform the cubes into large octahedra through a series of particle shape evolution.

Graphical abstract: Direct synthesis of size-tunable PbS nanocubes and octahedra and the pH effect on crystal shape control

Back to tab navigation

Supplementary files

Article information


Submitted
30 Oct 2014
Accepted
10 Dec 2014
First published
15 Dec 2014

Dalton Trans., 2015,44, 15088-15094
Article type
Communication

Direct synthesis of size-tunable PbS nanocubes and octahedra and the pH effect on crystal shape control

H. Chen, S. Wu and M. H. Huang, Dalton Trans., 2015, 44, 15088
DOI: 10.1039/C4DT03345K

Social activity

Search articles by author

Spotlight

Advertisements