Abstract
Tungstate doped TiO2-SiO2 aerogels (W/TiO2-SiO2) was synthesized and photocatalytic degraded methamphetamine (MAT) preferentially in seizure samples which containing caffeine. As a control, TiO2 (P25) photocatalytic degraded both MAT and caffeine simultaneously. The degradation rate of MAT under simulated sunlight for TiO2 (P25), TiO2-SiO2 aerogels, W/TiO2 and W/TiO2-SiO2 are 28.1%, 64.2%, 74.1% and 98.8% within 60 min. The photocatalytic efficiency of W/TiO2-SiO2 for degradation of MAT is 7.0, 4.4 and 1.9 times higher than TiO2 (P25), TiO2-SiO2 aerogels and W/TiO2. The enhanced photocatalytic performance of W/TiO2-SiO2 could be attributed to increase the adsorption of MAT induced by tungstate-doping.
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