TiO_2/活性炭复合体对罗丹明B的光催化降解

PHOTOCATALYTIC DEGRADATION OF RHODAMINE B ON TITANIUM DIOXIDE BONDED ACTIVE CARBON COMPOSITES

以紫外灯为光源,通过对可溶性染料罗丹明B的降解反应,考察TiO2/活性炭复合体的光催化活性,探讨了光催化反应中溶液的pH值、光强、反应温度和罗丹明B的起始浓度对催化反应的影响,结果表明,TiO2/活性炭复合体具有很高的光催化活性,对罗丹明B的降解过程遵循LangmuirHinshelwood动力学方程,降解速率受pH值、罗丹明B起始浓度和入射光强度的影响很大,反应温度对降解速率影响很小.在研究范围内,pH6和40W的入射光强度有利于光催化降解.

UV lamp being lamp house,the photoactivity of the TiO 2 bonded active carbon(TiO 2/AC) was investigated by the degradation of dissoluble Rhodamine B.Moreover,the effects of the pH value,light intensity,temperature in reaction and initial concentration of Rhodamine B in solution on the photocatalytic reaction were discussed.The results indicated that TiO 2/AC shows high photocatalytic activity,the degradation raction of Rhodamine B fits Langmuir Hinshelwood kinetic equation,degradation rate is largely affected by pH value,initial concentration of Rhodamine B and light intensity,slightly for temperature in reaction.In research scope,pH 6 and 40W are good for the degradation reaction of Rhodamine B.