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本文采用与铀酰离子吸收光谱匹配较好的Ga灯为光化学光源,对UO_2(NO_3)_2-HCOOH,UO_2(NO_3)_2-HCOOH-HCOONa体系光化反应进行了研究,确定了光化反应的反应物和生成物之间的化学计量关系。气相色谱分析结果表明,CO_2与CO的比值约为15:1。在U(Ⅵ)光化学还原过程中,消耗1mol甲酸,则生成1mol四价铀和1mol气体(CO_2+CO),据此推断UO_2~(2+)-HCOOH体系主要的光化学反应方程式为: UO_2~(2+)+HCOO~-+3H~+→U~(4+)+CO_2+2H_2O还研究了各种条件对体系光化学反应的影响。
In this paper, the photolysis reaction of UO_2 (NO_3) _2-HCOOH and UO_2 (NO_3) _2-HCOOH-HCOONa system was studied by using Ga lamp which is better matched with uranyl ion absorption spectrum. Stoichiometry between reactants and products. Gas chromatographic analysis showed that the ratio of CO 2 to CO was about 15: 1. In photochemical reduction of U (Ⅵ), 1 mol of formic acid was consumed and 1 mol of U4 + 1 mol of gas (CO 2 + CO) was generated. The main photochemical reaction equation of UO_2 ~ (2 + (2 +) + HCOO ~ - + 3H ~ + → U ~ (4 +) + CO_2 + 2H_2O The effects of various conditions on the photochemical reaction of the system were also studied.