本文選題：水滑石 + 薄膜修飾��； 參考：《沈陽化工大學(xué)》2017年碩士論文

【摘要】：層狀雙金屬氫氧化物也稱陰離子粘土或水滑石類化合物,它是一類陰離子型層狀化合物。其主體層板帶正電荷,帶有負電荷的陰離子鑲嵌在層間。二者通過化學(xué)鍵(共價鍵)相結(jié)合。由于水滑石類化合物具有層板金屬陽離子組成和層間陰離子種類的可調(diào)換性、結(jié)構(gòu)可復(fù)原性及適宜的微孔結(jié)構(gòu)、簡單的合成過程、環(huán)境友好性等特性,所以其無論在環(huán)境保護、催化反應(yīng)、光電化學(xué)方向還是醫(yī)藥制備等領(lǐng)域均展現(xiàn)出光明的應(yīng)用前景。層狀結(jié)構(gòu)對電荷轉(zhuǎn)移有協(xié)同作用,可以有效抑制電子-空穴對復(fù)合和納米粒子團聚。通過在電極表面進行水滑石薄膜修飾,可以促進電化學(xué)反應(yīng)時電子的得失發(fā)生,使水滑石在光電化學(xué)領(lǐng)域有廣闊的應(yīng)用前景。本文利用Co(NO_3)_2、Zn(NO_3)_2、Al(NO_3)_3原料,采用共沉淀方法合成具有不同Co摻雜量的Co Zn Al水滑石,通過XRD和UV-Vis對制備的水滑石粉體進行了表征,以確定水滑石晶體結(jié)構(gòu)和可見光吸收性能;采用涂覆法制備了Co Zn Al水滑石修飾的薄膜電極,采用三電極體系對薄膜電極的光生電流大小及電化學(xué)活性進行了測試,考察了不同催化過程、不同pH、不同電解質(zhì)溶液種類、不同電解質(zhì)溶液濃度、不同甲基橙濃度、不同Co摻雜量對甲基橙降解率的影響。測試結(jié)果表明不同Co摻雜量的水滑石均形成了單一晶相的水滑石結(jié)構(gòu),且Co Zn Al水滑石在可見光和紫外光區(qū)均有光吸收性能,Co Zn Al水滑石修飾電極具有良好的電化學(xué)性能和光電響應(yīng)能力,其中Co:Zn:Al摩爾比為0.2:2:1的Co Zn Al水滑石修飾的薄膜電極的光生電流最大;以該電極作為工作電極,以1 mol/L Na NO_3溶液為電解質(zhì)溶液,在溶液pH=5的情況下降解5 mg/L甲基橙,240 min后甲基橙降解率可達到90%。
[Abstract]:Layered bimetallic hydroxides, also called anionic clay or hydrotalcite compounds, are anion layered compounds. The main plate is positively charged and anions with negative charge are embedded in the interlayer. The two are combined by chemical bonds (covalent bonds). Because the hydrotalcite compounds have the characteristics of metal cation composition and interlayer anions interchangeability, structure resilience and suitable micropore structure, simple synthesis process, environmental friendliness and so on, the hydrotalcite compounds are protected in the environment. Catalytic reaction, photochemistry and pharmaceutical preparation are promising applications. The layered structure has synergistic effect on charge transfer, which can effectively inhibit the electron-hole pair recombination and nanoparticles agglomeration. The hydrotalcite film modification on the electrode surface can promote the occurrence of electron loss and gain in the electrochemical reaction, which makes the hydrotalcite have a broad application prospect in the field of photochemistry. In this paper, the Co Zn Al hydrotalcite with different Co doping amount was synthesized by coprecipitation method, and the prepared water talcum powder was characterized by XRD and UV-Vis in order to determine the crystal structure and visible light absorption property of hydrotalcite. The Co Zn Al hydrotalcite modified thin film electrode was prepared by coating method. The photogenerated current and electrochemical activity of the film electrode were measured by three-electrode system. The different catalytic processes, different pH and different electrolyte solutions were investigated. The effect of different electrolyte concentration, different concentration of methyl orange and different amount of Co doping on the degradation rate of methyl orange was studied. The results show that the hydrotalcite with different Co doping content forms a single crystal phase hydrotalcite structure. The Co Zn Al hydrotalcite-modified electrode has good electrochemical performance and photoelectric response ability in both visible and ultraviolet region. The photogenerated current of the film electrode modified by Co Zn Al hydrotalcite with Co:Zn:Al molar ratio of 0.2: 2: 1 was the largest. The electrode was used as working electrode and 1 mol/L Na NO_3 solution as electrolyte solution. The degradation rate of methyl orange can reach 90 after degradation of methyl orange for 5 mg/L with pH=5 for 240 min.
【學(xué)位授予單位】：沈陽化工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O646.54

【參考文獻】

相關(guān)期刊論文 前10條

1 江暉;李丹;廖天宇;曾慶文;耿文華;;超聲波聯(lián)合光催化對沼液脫氮處理的效果[J];江蘇農(nóng)業(yè)科學(xué);2016年05期

2 蘇海霞;張朝暉;趙小燕;李智;燕芳;張寒;;太赫茲譜定量測試中朗伯比爾定律表征形式分析[J];光譜學(xué)與光譜分析;2013年12期

3 張毅;劉東斌;申延明;樊麗輝;李士風(fēng);邱麗娟;;酒石酸插層水滑石修飾ITO電極伏安法測定水中鉛[J];冶金分析;2013年11期

4 王小蓉;吳平霄;;ZnAlTi型層狀雙金屬氫氧化物光催化降解亞甲基藍的研究[J];礦物學(xué)報;2012年S1期

5 黃萬撫;嚴思明;丁聲強;;膜分離技術(shù)在印染廢水中的應(yīng)用及發(fā)展趨勢[J];有色金屬科學(xué)與工程;2012年02期

6 方明暉;詹樹林;林俊雄;呂大豐;;活性染料廢水的混凝處理研究[J];工業(yè)水處理;2007年02期

7 劉梅紅;;印染廢水處理技術(shù)研究進展[J];紡織學(xué)報;2007年01期

8 陸朝陽,沈莉莉,張全興;吸附法處理染料廢水的工藝及其機理研究進展[J];工業(yè)水處理;2004年03期

9 汪霄,李敏慧,易強;光催化降解甲基橙溶液的研究[J];環(huán)境導(dǎo)報;2003年09期

10 張音波,余煜棉,劉千鈞;多相光催化降解染料廢水的研究進展[J];工業(yè)水處理;2001年12期

相關(guān)博士學(xué)位論文 前1條

1 艾智慧;微波/超聲輔助光催化降解氯酚的研究[D];華中科技大學(xué);2004年

相關(guān)碩士學(xué)位論文 前2條

1 孫瑩瑩;活性炭納米纖維的制備及染料脫色性能研究[D];大連理工大學(xué);2014年

2 雷雨;層層自組裝水滑石/聚電解質(zhì)復(fù)合薄膜的制備及性能研究[D];北京化工大學(xué);2009年

，

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