Abstract
The present study describes a relative comparison of antimicrobial and photocatalytic activity in titania encapsulated nickel ferrite nanoparticles with different dopants. The photocatalytic and antimicrobial activity in doped titania composite nanoparticles follows the sequence: W4+ doped > Nd3+ doped > Zn2+ doped > undoped titania. The maximum enhancement in tungsten doped titania is attributed to the greater inhibition of electron hole recombination process and decrease in band gap in titania. The ferrite magnetic nanoparticles encapsulated with the photocatalytic shell retain superparamagnetic characteristics and magnetic strength encouraging their potential application as removable antimicrobial photocatalytic composite nanoparticles. The combination of reverse micelle and hydrolysis method is recognised as a promising method for the synthesis of these composite nanoparticles.
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