【摘要】 ＳＯ_２水溶液的光催化选择氧化和氢转移王增华，洪剑斌，庄启星（厦门大学化学系，厦门，３６１００５）关键词二氧化硫，光催化，选择氧化，氢转移，光溢流以一定ｐＨ的ＳＯ２水溶液为反应液、Ｐｔ／Ｃｄｓ为光催化剂，在封闭体系中用可见光辐照进行选择氧化反应：以自?..更多还原

【Abstract】 By changing initial concentration,reaction temperature,pH and irradiation time,the photocatalytic selective oxidation of SO2 aqueous solution is investigated.The experimental results show that both percentage oxidation of and selectivity of dithionate are closely interrelated and assumption on the role of intermediates,atomic hydrogen H,which was produced prior to H2 formation,photospillover and participation in the mediated reduction of to form,has been verified.In optimal conditions of H·formation,0.05 mol/L,80℃,pH8.8 and irradiation time 4 h,the selectivity of the expensive can be increased to 59.3% as the first oxidation product.更多还原