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| Study on Photoelectrocatalytic Oxidation of Rhodamine B with Adsorption Loaded Nano-TiO2 Electrode |
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| DOI：10.11980/j.issn.0254-508X.2015.03.001 |
| Key Words:photoelectrocatalytic adsorption load rhodamine B porous metal |
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| Abstract:Using porous metal adsorption loaded nano-TiO2 as photoelectric anode in combination with nano-TiO2 colloid to create heterogeneous photocatalytic system and use for the oxidation degradation of rhodamine B. The degradation rate of rhodamine B was characterized with absorbance measured by spectrophotometer. The catalytic oxidation photoelectric synergy effect of the adsorption loaded nano-TiO2 photoelectrode was confirmed with the experimental results. The influence of bias voltage, electrolyte, the aeration speed and the way of oxygen supply on the process of photoelectrocatalytic oxidation was studied. The results indicated that the photocatalytic efficiency was improved by photoelectrocatalytic, and verified the photoelectric synergy effect, the reason of which was probably that the combination of electrons and holes was delayed, under the condition of the bias voltage was 0.8 V, 0.5 g/L anhydrous sodium sulfate was used as the electrolyte, and 2 mL/L H2O2 was used as oxygen source, the efficiency of photoelectrocatalytic oxidation degradation of rhodamine B was the best, UV light irradiation 15 min, the degradation rate of rhodamine B was 97.4%. This adsorption loading could also be applied to other porous metal material. The synergy mechanism of the adsorbed loaded photoelectrocatalytic and heterogeneous photocatalytic oxidation was also discussed. |
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