本文關(guān)鍵詞： 碳載體 層狀雙金屬氫氧化物 電化學(xué)氧化 電化學(xué)檢測(cè) 硫化物　出處：《合肥工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)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(fù)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(chǎng)發(fā)射掃描電子顯微鏡(FE-SEM)和電化學(xué)方法對(duì)復(fù)合材料的結(jié)構(gòu)及性能進(jìn)行了表征。結(jié)果表明：花瓣?duì)畹腃eO2-NiAl-LDHs均勻地分散在螯合活性炭表面。考察了CeO2-NiAl-LDHs/MFT/AC對(duì)水溶液中硫化物的吸附行為。結(jié)果表明：該吸附過(guò)程是自發(fā)的吸熱反應(yīng),符合準(zhǔn)二階動(dòng)力學(xué)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(duì)水中硫化物的電化學(xué)催化氧化行為。結(jié)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(fù)合材料(CeO2-NiAl-LDHs/GO).并通過(guò)FT-IR、XRD、 FE-SEM和電化學(xué)方法對(duì)復(fù)合材料的結(jié)構(gòu)和性能進(jìn)行表征。結(jié)果表明：層狀的CeO2-NiAl-LDHs復(fù)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(cè)子。結(jié)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(nèi),呈良好的線性增長(zhǎng)關(guān)系,檢測(cè)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(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB33;X703

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相關(guān)期刊論文 前1條

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本文編號(hào)：1467728