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酸性橙7降解的微观反应机理及动力学研究
Mechanism and Kinetics Studies on the Degradation of Acid Orange 7
【摘要】 采用纳秒级时间分辨脉冲辐解技术,考察了典型的萘酚型偶氮染料酸性橙7(AcidOrange7,简称AO7)在水溶液中与羟基(·OH)和水合电子(e-aq)的微观反应,对反应瞬态吸收图谱作了归属,通过跟踪瞬态吸收的生成动力学求得了反应速率常数,并结合AO7水溶液γ辐解前后的UV Vis吸收变化,提出了相应的反应机理。
【Abstract】 The reactions of ·OH and e-aq with AO7 in aqueous solutions were studied by nano-second pulse radiolysis techniques. The transient absorption spectra were attributed and the second order reaction rate constants were determined by following the buildup (kinetics) of the transient absorptions. In combination with the analysis of the UV-Vis absorption changes of AO7 after γ-radiolysis, the underlying reaction mechanisms were elucidated.
【关键词】 酸性橙7;
脉冲辐解;
瞬态图谱;
γ-辐解;
降解机理;
【Key words】 Acid orange 7; Pulse radiolysis; Transient absorption spectra; Gamma-radiolysis; Degradation mechanism;
【Key words】 Acid orange 7; Pulse radiolysis; Transient absorption spectra; Gamma-radiolysis; Degradation mechanism;
【基金】 国家自然科学基金(20077019)资助项目
- 【文献出处】 光谱学与光谱分析 ,Spectroscopy and Spectral Analysis , 编辑部邮箱 ,2005年05期
- 【分类号】X791
- 【被引频次】17
- 【下载频次】375