本文關鍵詞： 碳載體 層狀雙金屬氫氧化物 電化學氧化 電化學檢測 硫化物　出處：《合肥工業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：以螯合活性炭為載體,采用尿素水解法制備了二氧化鈰-鎳鋁／層狀雙金屬氫氧化物/螫合活性炭復合物(CeO2-NiAl-LDHs/MFT/AC)。并采用傅立葉紅外光譜(FT-IR)、X射線晶體衍射(XRD)、場發(fā)射掃描電子顯微鏡(FE-SEM)和電化學方法對復合材料的結構及性能進行了表征。結果表明：花瓣狀的CeO2-NiAl-LDHs均勻地分散在螯合活性炭表面。考察了CeO2-NiAl-LDHs/MFT/AC對水溶液中硫化物的吸附行為。結果表明：該吸附過程是自發(fā)的吸熱反應,符合準二階動力學模型和Langmuir吸附模型。室溫下亞硫酸根離子的最大吸附量為483.09 mg/g,硫離子的最大吸附量為181.15 mg/g。然后,制備了CeO2-NiAl-LDHs/MFT/AC和碳納米管混合物修飾的充蠟石墨電極(MWCNTs/CeO2-NiAl-LDHs/MFT/AC/WGE)。研究了該電極上對水中硫化物的電化學催化氧化行為。結果表明：該修飾電極能成功地將水中的亞硫酸根和硫離子氧化為硫酸根。以氧化石墨烯為載體,采用尿素水解法制備了二氧化鈰-鎳鋁/層狀雙金屬氫氧化物/氧化石墨烯復合材料(CeO2-NiAl-LDHs/GO).并通過FT-IR、XRD、 FE-SEM和電化學方法對復合材料的結構和性能進行表征。結果表明：層狀的CeO2-NiAl-LDHs復合物已形成。采用涂布法制備了CeO2-NiAl-LDHs/GO修飾的充蠟石墨電極,將其用于水中亞硫酸根和硫離的檢測子。結果表明:S032-和s2-的氧化峰電流與濃度分別在1×10-6～13×10-6 mol/L和1×10-6～15×10-6 mol/L的濃度范圍內,呈良好的線性增長關系,檢測限分別為7×10-8 mol/L和2×10-7 mol/L(3σ)。
[Abstract]:The chelate activated carbon was used as the carrier. CeO2-NiAl-LDHs / MFT / AC / CeO2-NiAl-LDHs / MFT / AC composites were prepared by urea hydrolysis method. ... and Fourier transform infrared spectroscopy (FT-IR). X-ray crystal diffraction (XRD). Field emission scanning electron microscope (FE-SEM). And electrochemical methods were used to characterize the structure and properties of the composites. Petal-like CeO2-NiAl-LDHs was uniformly dispersed on the surface of chelate activated carbon. The adsorption behavior of CeO2-NiAl-LDHs/MFT/AC on sulfides in aqueous solution was investigated. The results show that:. The adsorption process is a spontaneous endothermic reaction. According to the quasi-second-order kinetic model and Langmuir adsorption model, the maximum adsorption capacity of sulfite ion at room temperature is 483.09 mg/g. The maximum adsorption capacity of sulfur ion is 181.15 mg / g. A paraffin filled graphite electrode modified with CeO2-NiAl-LDHs/MFT/AC and carbon nanotubes was prepared. MWCNTs / CeO2-NiAl-LDHs / MFT / AC / WGE). The electrochemical catalytic oxidation behavior of sulfides in water on the modified electrode was studied. The results showed that the modified electrode could successfully oxidize sulfite and sulfur ions in water to sulphate radical and take graphene oxide as the carrier. CeO2-NiAl-LDHs / GOG / CEO _ 2-NiAl-LDHs / GOG / CEO _ 2-NiAl-LDHs / O _ 3 composites were prepared by urea hydrolysis method and were characterized by FT-IR XRD. The structure and properties of the composites were characterized by FE-SEM and electrochemical methods. The layered CeO2-NiAl-LDHs complex has been formed and CeO2-NiAl-LDHs/GO modified paraffin graphite electrode was prepared by coating method. The results show that the oxidation peak current and concentration of S032- and s2- in water are 1 脳 10 ~ (-6) ~ (13) 脳 10 ~ (-6), respectively. The concentration range of mol/L and 1 脳 10-6 mol/L is 15 脳 10-6 mol/L. The detection limits were 7 脳 10 ~ (-8) mol/L and 2 脳 10 ~ (-7) mol/L(3 蟽 ~ (-1), respectively.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB33;X703

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本文編號：1467728