發(fā)布時(shí)間：2018-03-19 21:45

  本文選題：凹凸棒土　切入點(diǎn)：類(lèi)芬頓反應(yīng)　出處：《南京大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：導(dǎo)電聚合物聚苯胺由于其可以提高一些金屬離子的催化活性收到廣泛關(guān)注;類(lèi)芬頓反應(yīng)體系是一種可以降解水中有機(jī)污染物的高級(jí)氧化方法;凹凸棒土是一種環(huán)境友好,結(jié)構(gòu)穩(wěn)定,價(jià)格低廉的粘土礦物,適合作為催化劑載體。本文以鐵離子飽和的凹凸棒土為模板,開(kāi)發(fā)了一種新型的化學(xué)氣相沉積法合成了鐵-凹凸棒土-聚苯胺復(fù)合材料,通過(guò)X射線衍射、X射線光電子能譜、紅外光譜、拉曼光譜等手段對(duì)制備材料進(jìn)行了表征。確定了在凹凸棒土在合成材料的過(guò)程中晶體結(jié)構(gòu)未發(fā)生變化,并且在凹凸棒土模板上合成了聚苯胺。通過(guò)化學(xué)計(jì)算模擬了聚苯胺在凹凸棒土孔道間的聚合過(guò)程。本研究選取阿特拉津?yàn)槟繕?biāo)污染物,研究了聚苯胺的合成對(duì)鐵離子飽和凹凸棒土催化類(lèi)芬頓反應(yīng)對(duì)污染物在礦物表面吸附和降解過(guò)程的影響。研究發(fā)現(xiàn),凹凸棒土孔道間的Fe(Ⅲ)可以被苯胺還原為Fe(Ⅱ),從而大大提高類(lèi)芬頓反應(yīng)速率。此外,聚苯胺在酸性條件下的導(dǎo)電性以及對(duì)阿特拉津的π-π吸附也對(duì)阿特拉津的降解起到促進(jìn)作用。鐵-凹凸棒土-聚苯胺(Fe(Ⅲ)-ATTP-ANI350)相比于鐵離子飽和凹凸棒土(Fe(Ⅲ)-ATTP)降解阿特拉津效率提高近150倍。實(shí)驗(yàn)結(jié)果表明,鐵-凹凸棒土-聚苯胺復(fù)合材料可以通過(guò)靜止沉淀進(jìn)行分離,并在酸性條件下重復(fù)循環(huán)使用6次后鐵元素流失僅有1.5%,降低了環(huán)境應(yīng)用中造成二次污染物的風(fēng)險(xiǎn)。
[Abstract]:Due to the conductive polymer polyaniline can improve the catalytic activity of some metal ions received widespread attention; Fenton reaction system is a kind of advanced oxidation method can degrade organic pollutants in water; attapulgite is a kind of environmental friendly, stable structure, clay minerals of low price, suitable as a catalyst carrier. The iron ion saturation Attapulgite as template, developed a new type of chemical vapor deposition method to synthesize iron - attapulgite PANI composite materials by X ray diffraction, X ray photoelectron spectroscopy, infrared spectroscopy, Raman spectroscopy of the prepared materials were characterized. In the process of attapulgite in synthetic materials the crystal structure has not changed is determined, and the synthesis of Polyaniline in attapulgite template. To simulate the process of polymerization of Polyaniline in attapulgite pore between through chemical calculation in this research. Selection of atrazine as the target pollutant, studied the synthesis of polyaniline on iron saturated attapulgite catalytic class Fenton reaction of the pollutants in the influence of mineral surface adsorption and degradation process. The study found that attapulgite pore between Fe (III) aniline can be reduced to Fe (II), thus greatly improve the reaction rate of Fenton. In addition, the conductive polyaniline in acidic conditions and atrazine on tt-tt adsorption also promote the degradation of atrazine. Iron - attapulgite - polyaniline (Fe (III) -ATTP-ANI350) compared to the iron saturation of attapulgite (Fe (III) -ATTP) atrazine degradation efficiency is raised 150 times. The experimental results show that iron - Attapulgite PANI composite material by static precipitation separation, and in acidic conditions used repeatedly after 6 times of iron loss is only 1.5%, reduced the application environment The risk of two pollutants.

【學(xué)位授予單位】：南京大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：X703

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本文編號(hào)：1636136