Journal
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
Volume 34, Issue 4, Pages 1043-1053Publisher
SPRINGER HEIDELBERG
DOI: 10.1590/0104-6632.20170344s20160024
Keywords
Total acidity; Anodized aluminum; Structured catalysts
Categories
Funding
- Agencia Nacional de Promocion Cientifica y Tecnologica (National Agency of Scientific and Technological Promotion, Argentina)
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (National Council for Scientific and Technological Research, CONICET)
Ask authors/readers for more resources
In the present work, the effect of the different variables involved in the process of aluminum anodizing on the total surface acidity of the samples obtained was studied. Aluminum foils were treated by the electro-chemical process of anodic anodizing within the following variable ranges: concentration = 1.5- 2.5 M; temperature = 303-323 K; voltage = 10-20 V; time = 30-90 min. The total acidity of the samples was characterized by two different methods: acid-base titration using Hammett indicators and potentiometric titration. The results showed that anodizing time, temperature and concentration were the main variables that determined the surface acid properties of the samples, and to a lesser extent voltage. Acidity increased with increasing concentration of the electrolytic bath, whereas the rest of the variables had the opposite effect. The results obtained provide a novel tool for variable selection in order to use synthetized materials as catalytic supports, adding to previous research based on the morphology of alumina layers.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available