Synthesis of heteroarchitectures of PbS nanostructures well-erected on electrospun TiO2 nanofibers.
In this paper, we have successfully fabricated TiO(2)/PbS heteroarchitectures with high-quality single-crystalline PbS nanostructures well-erected on electrospun TiO(2) nanofibers matrices via hydro(solvo)thermal method using L-cysteine as the sulfur donor and chelating reagent. The experiment results showed that the morphology and size of secondary PbS nanostructures grown on TiO(2) nanofibers can be changed significantly by utilizing two kinds of different reaction solvents (water and acetylacetone, respectively). In case of water serving as solvent, the superb cube-shaped PbS nanocrystals with the edge length ranging from 150 to 300 nm were prepared. While acetylacetone acting as solvent, the high-density PbS nanoparticles with 10-30 nm in length were obtained. And, it is interesting that PbS nanostructures were not only uniformly monodispersed but also closely attached to TiO(2) nanofibers surface. What is more, the further studies suggested that the formation of TiO(2)/PbS heteroarchitectures might take on chelation-anchoring-nucleation-directional growth strategy.
Su
Chunyan
C
Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory for UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China.
Shao
Changlu
C
Liu
Yichun
Y