A Novel Porous Sm2Ti2O7 Material Synthesized in Sol-gel Process Using Polyethylene Glycol 4000 as Template
oleh: Wenjie ZHANG, Haolun LI, Ling DU
| Format: | Article |
|---|---|
| Diterbitkan: | Kaunas University of Technology 2018-11-01 |
Deskripsi
A sol-gel method was used to synthesise Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> photocatalysts. It was found that crystalline formation of pyrochlore phase Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> is promoted by addition of the PEG4000 template. Reduced particles aggregation was observed in the porous Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>. The addition of PEG4000 lead to a slight increase in bandgap energy of Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>. The conduction band edge and valence band edge positions of porous Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> were – 0.37 V and 2.75 V, respectively. The first order kinetic reaction constant is 0.01637 min<sup>-1</sup> on the porous Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>, while the reaction constant was 0.00431 min<sup>-1</sup> on the bare Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>.<p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.24.4.18213">http://dx.doi.org/10.5755/j01.ms.24.4.18213</a></p>