化学发光法探索过氧碳酸钠溶解放氧反应机理的研究  

The study of the reaction mechanism of sodium percarbonate releasing oxygen by chemiluminescence method

作　　者：宋雨姮 魏海英[1] 耿红[1] 张媛[1,2] 卢铁彦[1,3] 

机构地区：[1]山西大学环境科学研究所,山西太原030006 [2]山西大学环境与资源学院,山西太原030006 [3]仁荷大学化学系

出　　处：《应用化工》2016年第7期1228-1231,共4页Applied Chemical Industry

基　　金：国家自然科学基金(21177078);山西省回国留学人员科研项目(2013-012);山西省第六批海外百人计划项目

摘　　要：为探索过氧碳酸钠的作用机理,研究以pH为10.1的硼酸缓冲液、硫酸钴溶液(0.1 mol/L)、鲁米诺溶液(0.02 mol/L)构建鲁米诺化学发光体系,并利用BPCL超微弱发光分析仪分析过氧碳酸钠溶液以及碳酸钠与过氧化氢在不同混合比时对该体系发光的影响。研究显示,在2 m L的体系中,Na_2CO_3浓度达到0.1 mol/L后,发光强度先升高后降低,随后缓慢回升至30万cps(counts/s);过氧碳酸钠的质量达到0.02 g(即Na_2CO_3浓度为0.06 mol/L)后,初始发光保持在16万cps左右,延长过氧碳酸钠质量为0.03 g实验组的发光测量时间,发现在200 s后,发光强度上升至30万cps并保持稳定。结果表明,在水中碳酸钠对过氧化氢的分解起到一定的缓释作用,同时碳酸钠可以使过氧化氢的分解速率保持在一个稳定的水平上,使过氧碳酸钠作用时限延长,并保证其放氧效率。To study the mechanism of the sodium percarbonate,and construct the luminol chemiluminescence（ CL） system with borate buffer（ pH 10. 1）,cobalt sulfate solution（ 0. 1 mol / L）,and luminol solution（ 0. 02 mol / L）,and then analyzed the variation of the CL system by BPCL ultra-weak luminescence analyzer by changing the concentration of sodium carbonate solution,over the concentration of hydrogen peroxide solution. In the system,the study showed that the intensity of the CL increased before decreasing,followed by a slow recovery to 300 000 cps（ counts / s） while the concentration of Na2CO3reached0. 1 mol / L; When sodium percarbonate quality reached 0. 02 g（ i. e. the Na2CO3 concentration is0. 06 mol / L）,the CL remained at about 160 000 cps at the beginning. While extended the text time of the experimental group with 0. 03 g sodium percarbonate,we found that the intensity of CL increased to300 000 cps and remained stable after 200 s. The result showed that the sodium carbonate in the water played a control-release effect to the decomposition of the hydrogen peroxide as while as keeps the decomposition rate at a stable level which could make the oxygen release spontaneous and stable.

关 键 词：过氧碳酸钠 化学发光 鲁米诺 

分 类 号：TQ034[化学工程]