水滑石层间碘酸根离子的还原性机理研究  

Research on the Reduction Mechanism of Iodate Pillared Hydrotalcite

作　　者：王力耕[1] 杨超鸿[1] 郑飞翔[1] 李伟强[1] 倪哲明[1] 

机构地区：[1]浙江工业大学化学工程学院,杭州310032

出　　处：《无机化学学报》2014年第6期1278-1286,共9页Chinese Journal of Inorganic Chemistry

摘　　要：通过X射线衍射(XRD)和傅里叶变换红外(FTIR)光谱仪表征发现,经水合肼(N2H4·H2O)和亚硫酸钠(Na2SO3)两种还原剂处理碘酸根插层水滑石的产物分别为碘离子插层的水滑石(ZnAl-I LDHs)和硫酸根离子插层水滑石(ZnAl-SO4LDHs)。进一步研究表明,N2H4·H2O和水滑石的反应为D7模型的核外层扩散反应,N2H4·H2O在水滑石微球界面和IO3-发生反应。而Na2SO3则先进入了水滑石层间,然后与层间的IO3-反应,其模型符合D11动力学模型。The iodate pillared hydrotalcite was deoxidized by hydrazine hydrate （N2H4· H2O） and sodium sulfite （Na2SO3）.Detected by X-ray diffraction （XRD） and Fourier transform infrared （FTIR） spectroscopy,the products were the iodine ion intercalated hydrotalcite （ZnAl-I LDHs） and sulfate ion intercalated hydrotalcite （ZnAl-SO4 LDHs）.Furthermore,we found two mechanisms according to the reactions.The N2H4 ·H2O deoxidizing the hydrotalcite conforms to the outer core diffusion of D7 dynamics model and the reaction occurs at the hydrotalcite microspheres interface.However,the Na2SO3 firstly enters to the interlayer and then reacts with IO3-.The model conforms to the D11 dynamic model.

关 键 词：碘酸根 水滑石 还原 机理 

分 类 号：O614.241[理学—无机化学] O614.31[理学—化学]