【摘要】 研究了无光照条件下焦性没食子酸 -KBrO3-H2 SO4 体系振荡的基本规律 ,得到了2 5℃、35℃时起振时间τ、振荡周期T与各反应物起始浓度之间关系的经验方程 .以主波长为2 53.7nm的紫外灯为光源 ,研究了不同紫外光强度下该体系的振荡规律并给出了 2 5℃、照度为50 0Lx时τ、T与各反应物起始浓度之间关系的经验方程 .根据实验结果 ,对溴离子控制与非溴离子控制问题及紫外光在振荡过程中的作用机理进行了初步的探讨 .更多还原

【Abstract】 The oscillating behaviors in darkness of pyrogallic acid -KBrO 3-H 2SO 4-system have been studied, the relations between induction period τ 0 as well as oscillating period (T0) and the initial concentrations of reactants of the system have been determined experimentally at 25?℃、 35?℃ . Using a quartz ultraviolet lamp with a peak at 253.7?nm as ligth source, the oscillating behaviors of the system have been investigated under various intensity of illumination, the relations between τ、 T and the initial concentrations of reactants of the system have been obtained experimentally at 25?℃, 500?Lx. According to our experimental results, a brief discussion on the problem of bromide ion controlling or non bromide ion controlling and the acting mechanism of ultraviolet light during the oscillating has been given.更多还原