Open AccessControllable preparation of trifold nanorods and nanospheres of cadmium telluride via solvothermal process
Author(s) -
Wenjuan Kang,
Shuo Li,
Cong Wang,
Linhui Zhang,
Binnian Zhong
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abf1a6
Subject(s) - nanorod , polyvinylpyrrolidone , ascorbic acid , cadmium telluride photovoltaics , ethylene glycol , chemical engineering , materials science , solvothermal synthesis , nucleation , solvent , pulmonary surfactant , supersaturation , hydrothermal circulation , nanotechnology , nuclear chemistry , chemistry , inorganic chemistry , polymer chemistry , organic chemistry , engineering , food science
In this study, trifold CdTe nanorods and CdTe nanospheres were prepared by the environmentally benign solvothermal process where K 2 TeO 3 and CdCl 2 acting as the raw materials, L-ascorbic acid as the reducing agent, ethylene glycol as the solvent and polyvinylpyrrolidone as the surfactant, respectively. The morphology of the products can be regulated by the amount of KOH. Specifically, trifold CdTe nanorods could be prepared with 0.1 g of KOH before the reaction; while CdTe nanospheres were obtained with 0.5 g of KOH. The higher the amount of KOH added, the stronger the reducibility of L-ascorbic acid. For higher reducibility, CdTe crystal nuclei which was continuously generated will first nucleate and grow in the gaps between the rods of the trifold nanorods because of the special morphology and structure of the trifold nanorods. Therefore, with the increasing of the number of CdTe crystal nuclei caused by the accelerated reaction rate, the trifold nanorods will gradually evolve into nanospheres.