本文關(guān)鍵詞： 陽離子膜 電解法 鎢酸鹽 鉬酸鹽　出處：《上海應(yīng)用技術(shù)學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：鎢/鉬酸鹽是一類具有廣泛應(yīng)用的無機功能性材料,可應(yīng)用于微波、光學(xué)、催化劑、閃爍材料、傳感器、磁性以及電化學(xué)等方面。鎢/鉬酸鹽的合成方法有很多,然而這些方法存在許多缺點,比如,反應(yīng)時間長、或者有機聚合物的添加、或者反應(yīng)條件苛刻、或者操作過程繁雜。因此本文在研究了銅在鎢酸鈉水溶液中的電化學(xué)行為的基礎(chǔ)上,首次利用陽離子膜電解法制備鎢酸鹽和鉬酸鹽功能性材料及鎢/鉬-過渡金屬合金粉末,通過與以往的合成方法相比較,本方法不僅僅操作簡單、反應(yīng)條件溫和、原料廉價并且無副反應(yīng)、效率高等優(yōu)點。論文主要內(nèi)容概述如下：1.銅在鎢酸鈉水溶液中的電化學(xué)行為首次采用三電極體系在雙極室隔膜電解槽中使用循環(huán)伏安法研究Cu在Na2WO4水溶液中的電化學(xué)行為。測試結(jié)果表明,Cu的氧化過程形成了內(nèi)層的Cu20和CuO/Cu(OH)2以及外層的難溶于水的CuWO4水合物的混合薄層,穩(wěn)定生成CuWO4水合物的電位范圍為0.3V～1.0V。2.陽離子膜電解法制備金屬鎢酸鹽以第二章的研究結(jié)果為理論基礎(chǔ),通過陽離子膜電解法制備鎢酸銅、鎢酸鋅、鎢酸鎳、鎢酸鋁、鎢酸銀粉末以及鎢-銅、鎢-鐵、鎢-鎳、鎢-銀合金粉末。采用TG、IR、EDX、 XRD、TEM及HRTEM等表征手段對鎢酸銅進(jìn)行了分析,證明通過陽離子膜電解法制備的鎢酸銅是純凈的、無雜相的、結(jié)晶度高的納米級顆粒。然后對其余的鎢酸鹽粉末以及鎢-過渡金屬合金粉末進(jìn)行了EDX、XRD表征,結(jié)果表明制備的金屬鎢酸鹽是純凈的,無雜相的并且結(jié)晶度很高；制備的鎢-過渡金屬合金粉末是純凈的、無雜相的,而且是分布均勻的。3.陽離子膜電解法制備金屬鉬酸鹽通過陽離子膜電解法制備鉬酸銅、鉬酸鋅、鉬酸鐵、鉬酸鎳、鉬酸鋁、鉬酸銀以及鉬-銅、鉬-鐵、鉬-鎳、鉬-銀合金粉末。并且采用TG、IREDX、XRD、TEM及HRTEM等表征手段對鉬酸銅進(jìn)行了分析,證明了通過陽離子膜電解法制備的鉬酸銅是純凈的、無雜相的、結(jié)晶度高的納米級微粒。然后對其余的鉬酸鹽粉末以及鉬-過渡金屬合金粉末進(jìn)行了EDX、XRD等表征,結(jié)果表明制備的金屬鉬酸鹽是純凈的,無雜相的并且結(jié)晶度很高；制備的鎢-過渡金屬合金粉末是純凈的、無雜相的,而且是分布均勻的。
[Abstract]:Tungsten / molybdate is a kind of inorganic functional materials with wide application, which can be used in microwave, optics, catalyst, scintillation material, sensor, magnetism and electrochemistry. However, these methods have many disadvantages, such as the long reaction time, the addition of organic polymers, or the harsh reaction conditions. Therefore, on the basis of studying the electrochemical behavior of copper in sodium tungstate solution, we prepared tungstate and molybdate functional materials and tungsten / molybdenum transition metal alloy powder by cationic membrane electrolysis for the first time. Compared with the previous synthetic methods, this method is not only simple to operate, mild reaction conditions, cheap raw materials and no side reaction, The main contents of this paper are summarized as follows: 1. Electrochemical behavior of copper in sodium tungstate solution. The electrochemical behavior of copper in aqueous solution of sodium tungstate was studied by cyclic voltammetry in a bipolar chamber diaphragm electrolyzer using a three-electrode system for the first time. Chemical behavior. The results showed that the oxidation process of Cu formed a mixed layer of Cu20 and CuO/Cu(OH)2 in the inner layer and a mixed layer of the insoluble CuWO4 hydrate in the outer layer. The potential range of stable formation of CuWO4 hydrate is 0.3 V ~ (-1) V ~ (-1) V. 2.The preparation of metallic tungstate by cationic membrane electrolysis is based on the theoretical results in Chapter 2. Copper tungstate, zinc tungstate, nickel tungstate, aluminum tungstate are prepared by cationic membrane electrolysis. Silver tungstate powder and tungsten-copper, tungsten-iron, tungsten-nickel, tungsten-silver alloy powder. The copper tungstate prepared by cationic membrane electrolysis is pure and non-impurity phase. The other tungstate powder and tungsten transition metal alloy powder were characterized by EDX XRD. The results showed that the prepared tungstate was pure, impurity free and high crystallinity. The prepared tungsten transition metal alloy powder is pure, impurity free and evenly distributed. The preparation of metal molybdate by cationic membrane electrolysis method is used to prepare copper molybdate, zinc molybdate, ferric molybdate, nickel molybdate, aluminum molybdate, copper molybdate, zinc molybdate, ferric molybdate, nickel molybdate, aluminum molybdate by cationic membrane electrolysis, Silver molybdate and molybdenum-copper, molybdenum-iron, molybdenum-nickel, molybdenum-silver alloy powder. The copper molybdate prepared by cationic membrane electrolysis is pure and non-impurity phase. The other molybdate powder and the molybdenum transition metal alloy powder were characterized by EDX XRD. The results showed that the molybdate prepared was pure, impurity free and high crystallinity. The prepared tungsten-transition metal alloy powder is pure, impurity-free and uniformly distributed.
【學(xué)位授予單位】：上海應(yīng)用技術(shù)學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ136.13;TQ136.12

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本文編號：1529558