Preparation of alumina stabilized aqueous Pd colloid by reduction using gamma-radiolysis, UV-photolysis and H2 |
| |
Authors: | S C Tripathi M Kumar |
| |
Institution: | (1) Fuel Reprocessing Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India;(2) Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India |
| |
Abstract: | The techniques of gamma-radiolysis, UV photolysis and hydrogen-induced reduction of aqueous palladium perchlorate to ultrafine particles of Pd, in the presence of alumina sol, have been studied. As compared to H2-induced reduction, both UV photolytic and gamma-radiolytic reduction methods lead to a very stable, brown colored Pd colloid with relatively less absorption in the higher wavelength region and possessing much smaller volume average particle size (62 and 61 nm, respectively). Higher concentration of alumina sol and increase in pH from 1.8 to 7.2, favour the formation of smaller sized particles as determined by the dynamic light scattering technique. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|