| Autor: |
Sourav Ghosh, Pallab Bose, Somjyoti Basak, Milan Kanti Naskar |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Journal of Asian Ceramic Societies, Vol 3, Iss 2, Pp 198-205 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
2187-0764 |
| DOI: |
10.1016/j.jascer.2015.02.005 |
| Popis: |
A comparative study of the textural properties of γ-Al2O3 prepared by solvothermal-assisted evaporation-induced self-assembly (SA-EISA) and conventional evaporation-induced self-assembly (EISA) processes has been carried out using aluminum isopropoxide, triblock copolymer-type nonionic surfactant (Pluronic P123) and ethanol. The solvothermal reaction was carried out at 100 °C for 24 h followed by slow drying at 60 °C for 48 h. The synthesized products were characterized by thermogravimetry analysis (TGA), differential thermal analysis (DTA), X-ray diffraction (XRD) analysis, N2 adsorption–desorption study and transmission electron microscopy (TEM). The γ-Al2O3 prepared by SA-EISA process became stable up to 1000 °C. The powder prepared by SA-EISA process resulted in a significant increase in textural properties (BET surface area, pore volume and pore diameter) compared to that prepared by conventional EISA process. A better adsorption capacity for Congo red, a carcinogenic dye used in textile industry, was exhibited by the powders prepared by SA-EISA process. A proposed mechanism was illustrated for the formation of mesoporous γ-Al2O3 obtained by EISA and SA-EISA processes. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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