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当用紫外光辐照在氙气氛中的SO_3~(2-)水溶液时,加或不加半导体催化剂TiO_2粉末,都能生成SO_4~(2-)和H_2。加TiO_2的体系:SO_3~(2-)水溶液的浓度以≤0.2N、pH=8—9时放H_2较多。辐照八小时内H_2的产量随时间增长而级性上升。同时产H_20.22毫克分子,SO_3~(2-)的氧化率为20.9％。在上述条件下,不加TiO_2的体系发生了光化学反应,而且效率高于光催化反应。不同pH条件下,无光催化剂,加TiO_2或pt/TiO_2三种体系中,微碱性溶液,以光化学反应效率高。而酸性溶液,pt/TiO_2体系以光催化反应效率高。
SO_4 ~ (2-) and H_2 can be formed by irradiating SO_3 ~ (2-) aqueous solution in xenon atmosphere with or without the addition of TiO_2 powder. Adding TiO_2 system: SO_3 ~ (2) aqueous solution to ≤ 0.2N, pH = 8-9 release H_2 more. Within 8 hours of irradiation, the yield of H 2 increased with time. At the same time produce H_20.22 mmole, SO_3 ~ (2-) oxidation rate of 20.9%. Under the above conditions, photochemical reaction did not occur in the system without TiO_2, and the efficiency was higher than that of photocatalytic reaction. Under different pH conditions, no light catalyst, plus TiO 2 or pt / TiO 3 three systems, slightly alkaline solution to photochemical reaction with high efficiency. The acidic solution, pt / TiO 2 photocatalytic reaction system with high efficiency.