PHOTOCATALYTIC DEGRADATION OF RHB WITH MICROWAVE PREPARED PbMoO_4

摘要

Microwave prepared PbMoO_4 from H_2MoO_4 and Pb(NO_3)_2 was compared, in terms of its photocatalytic activity as catalyzer for decomposing rhodamine B (RhB), against samples prepared by hydrothermal and sonochemical methods from the same precursors. Microwave synthesis lasted 20 minutes; hydrothermal, 10 minutes and sonochemical method, 1 hour. X-rays diffraction patterns show that PbMoO_4 prepared by these three routes is compounded by the same phases. It is found that microwave synthesized PbMoO_4 particles are rounder, in an intermediate size (250 nm), compared to sonochemical (100 nm) and hydrothermal (600 nm) routes; microwave particles also exhibit higher photocatalytic activity for degradation of RhB under a xenon lamp.