A Novel Porous Sm2Ti2O7 Material Synthesized in Sol-gel Process Using Polyethylene Glycol 4000 as Template

Wenjie ZHANG, Haolun LI, Ling DU

Abstract


A sol-gel method was used to synthesise Sm2Ti2O7 photocatalysts. It was found that crystalline formation of pyrochlore phase Sm2Ti2O7 is promoted by addition of the PEG4000 template. Reduced particles aggregation was observed in the porous Sm2Ti2O7. The addition of PEG4000 lead to a slight increase in bandgap energy of Sm2Ti2O7. The conduction band edge and valence band edge positions of porous Sm2Ti2O7 were – 0.37 V and 2.75 V, respectively. The first order kinetic reaction constant is 0.01637 min-1 on the porous Sm2Ti2O7, while the reaction constant was 0.00431 min-1 on the bare Sm2Ti2O7.

DOI: http://dx.doi.org/10.5755/j01.ms.24.4.18213


Keywords


photocatalysis; Sm2Ti2O7; sol-gel; PEG4000; porous

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Print ISSN: 1392–1320
Online ISSN: 2029–7289