Synthesis and Characterization of Size-Controlled Titania Nanorods through Double Surfactants
| Autor: | Jia-Wei Shiu, Mai-Phuong La, Tun-Fun Way, Syang-Peng Rwei |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Diethylamine Anatase 010405 organic chemistry Chemistry Substituent 010402 general chemistry 01 natural sciences 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound Bromide Polymer chemistry Nanorod Physical and Theoretical Chemistry Ethylamine Triethylamine Alkyl |
| Zdroj: | Inorganic Chemistry. 60:7952-7960 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.1c00463 |
| Popis: | A synthetic technique based on a two-step sol-gel hydrothermal method using cetyltrimethylammonium bromide (CTAB) and triblock copolymer PEO106-PPO70-PEO106 (F127) as double surfactants with the assistance of three amines (ethylamine (EA), diethylamine (DEA), and triethylamine (TEA)) for fabrications of anatase titania nanorods is proposed. The formation and growth mechanisms of TiO2 crystals are described. We discovered that crystal size reduces with an increase in the number of alkyl substituents on the nitrogen of amines because the steric hindrance of the bulky alkyl substituent around nitrogen suppresses the nucleation and crystal growth rate. The size of titania from 80 to 220 nm is modulated with concentrations of EA, DEA, and TEA. The amines are considered as catalysts for morphological evolution of TiO2 crystals. The results indicate that the incorporation of double surfactants (F127-CTAB) has a dual role, acting as a chelating agent for titania against external forces and a capping agent inhibiting the three-dimensional growth of TiO2 crystals. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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