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<table>N<sub>2</sub> adsorption-desorption isotherms (a) and pore-size distribution (b) of SiO<sub>2</sub> powder
obtained from sol-gel method.</table>

International Journal of Photoenergy

fig3

Figure 3

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International Journal of Photoenergy

/ Composite Films Immobilized on Foam Nickel Substrate for the Photocatalytic Degradation of Gaseous Acetaldehyde

Figure 3