Generation of highly stable and active strong base sites on organized nano-porous alumina by calcium oxide

Autor:	Aliakbar Tarlani, Mir Pouyan Zarabadi
Rok vydání:	2013
Předmět:	Thermogravimetric analysis Alkaline earth metal Materials science Mineralogy Sorption General Chemistry Condensed Matter Physics Calcium nitrate chemistry.chemical_compound chemistry Desorption General Materials Science Titration Calcium oxide BET theory Nuclear chemistry
Zdroj:	Solid State Sciences. 16:76-80
ISSN:	1293-2558
DOI:	10.1016/j.solidstatesciences.2012.11.010
Popis:	In a new approach, strong basic sites has been successfully prepared by loading of calcium nitrate (Ca) on organized nano-porous alumina (ONPA). The prepared CaONPAs were characterized by low-angle X-ray diffraction (XRD), N 2 adsorption–desorption isotherms (Brunauer–Emmett–Teller (BET)-Barret–Joyner–Halenda (BJH)), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). Measuring of the amount of the basic sites and the basicity was carried out by titration method, temperature-programmed desorption (TPD-CO 2 ) and Hammett indicators. Resistance of the basic sites was also tested by washing with water. N 2 sorption measurements showed that supporting of the calcium nitrate on ONPA can lead to the bimodal porosity at lower loading. BET surface area of the bare ONPA was 212 m 2 /g which decreased to 111 m 2 /g for the 25% of loading of Ca (25CaONPA). The results pointed out that CaONPA samples have basicity between 18.4
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d44424c7f33d5fa194f8eb4dbfbfe637 https://doi.org/10.1016/j.solidstatesciences.2012.11.010 Zobrazit plný text záznamu Full Text from ScienceDirect