Abstract
TiO2/bentonite composites were prepared by a sol–gel method. X-ray diffraction measurements of the samples revealed that TiO2 had intercalated into the layers of bentonite and existed in anatase phase of TiO2. Acid red 3R was used as model compounds of textile dyes in this study. The effects of operational parameters, including TiO2 content, pH, as well as catalyst dosage, on photocatalytic degradation performance were examined. The experimental results showed that the removal rate of acid red 3R can be up to 96.7% under the following conditions: the dosage of TiO2/bentonite was 2 g/L, the content of TiO2 was 30%, the pH value was 3. And the photocatalytic reaction followed pseudo-first-order kinetics models.
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