I am working on dyes removal from aqueous solution by using LDH. already there are alot of LDHs used regarding to this application. I want to bring novality by changing the structure and composition of LDH.
Dear Tayyaba
Dyes can be cationic, anionic or nonionic molecules. Therefore, it is not easy to suggest a specific metals for the purpose you are after. I know many LDHs have been synthesized and also extensively studied because of their interesting properties.The mechanisms of adsorption of pollutants by LDH are also different from one pollutant to another. Some are adsorbed on the surface and some may be trapped between the layers of LDH. Although it is not easy to answer this question, I think functianalization of LDH with a suitable functional group might be a better idea.
Good luck!
Mohammad kooti, pls what do you mean by ,# I think functianalization of LDH with a suitable functional group might be a better idea?
Thank you so much for reply. i am using cationic dyes. if i would use metals from lanthanides what would be results? will they show good result with novality?
You might not get an exact answer at this forum!
Lanthanides are rather reactive in aqueous environment. You may start your work on "cut and try" basis. Ce (cheap and reactive) might be a better first choice followed by Y and Nd...
Tayyaba, i think if you work with anionic dye for adsorption by LDHs will be more favorable seen their interfoliar espace , but if you use for catalysis its good and more best if doping your LDHs with lanthanides,
My question asked to sajjad , pls why exactly ND and Y but not La??????
Salima Bouteraa Any of the Rare Earth (RE) metals can be tried except Pm (which is radioactive). Some are expensive, like Dy/Tb etc---Heavy RE.
Ce and La largely behave similarly in my alloys. It is better to try relatively different elements in the beginning.
You can also improve the adsorption property of LDH by doing calcination process at around > 800 °C because as the calcination temperature increases ultimately enhance its adsorption property. Otherwise, you can also improve it by doing surface modification by using various surfactants like ODTMA and CTAB, or natural surfactants. However, if you need some idea about improvement of adsorption property of LDH structure can follow the following paper,
Article Surface Modification of Synthesized Layered Double Hydroxide...
"Surface Modification of Synthesized Layered Double Hydroxide [LDH] for Methylene Blue Dye Removal in Textile Industry via Photocatalytic Activity under Visible Light"
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