本文選題：非均相Fenton催化劑　切入點(diǎn)：介孔碳　出處：《天津工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：介孔材料作為一種新型的納米材料,具有較大的比表面積和孔體積,規(guī)則整齊且可調(diào)的孔道結(jié)構(gòu)�；谶@些優(yōu)點(diǎn),介孔材料在處理染料廢水去除難生物降解有機(jī)物方面受到了極大的關(guān)注。本文致力于介孔碳和介孔硅材料的制備及改性研究,旨在制備出非均相Fenton催化降解亞甲基藍(lán)染料的高效催化劑。規(guī)則介孔碳材料表面親水性較低,利用過氧化氫處理材料引進(jìn)含氧官能團(tuán),增強(qiáng)碳材料的親水性和酸性,使其在溶液中分散更加均勻,促進(jìn)催化劑與溶液中有機(jī)物分子的接觸,由此增加非均相Fenton催化反應(yīng)進(jìn)程。使用雙金屬負(fù)載介孔硅材料,由于雙金屬的協(xié)同作用,使得此類催化劑在非均相Fenton催化降解染料過程中表現(xiàn)出較高的降解速率。本文具體研究?jī)?nèi)容如下：1.使用F127為模板劑,酚醛樹脂為碳源,硝酸鐵為鐵源,利用螯合劑共組裝的方法制備出鐵負(fù)載介孔碳材料Fe/meso-C,并使用過氧化氫修飾(標(biāo)記為H-Fe/meso-C),通過XRD、TEM、SEM口N：吸附-脫附等溫線表征可以看出,催化劑可以保持整齊有序的三維立體孔道結(jié)構(gòu),較大的比表面積和孔體積。經(jīng)過過氧化氫修飾后,材料的表面積,孔體積和孔徑均有所增大,表明材料經(jīng)過過氧化氫對(duì)碳基材料的刻蝕,使得孔徑擴(kuò)大,更有利于非均相Fenton催化反應(yīng)的順利進(jìn)行。2.使用低溫鎂熱反應(yīng)合成介孔硅材料,再經(jīng)過硬模板法制備出雙金屬鐵銅負(fù)載的介孔硅材料Fe-Cu@MPSi,通過XRD、TEM和N2吸附-脫附等溫線表征可以看出,催化劑在保持整齊有序的三維立體孔道結(jié)構(gòu)的基礎(chǔ)上,又新增一些不規(guī)則的孔道結(jié)構(gòu),使得介孔硅材料表現(xiàn)出比原料SBA-15更大的比表面積和孔體積。而硅作為一種半導(dǎo)體,電子可以在材料上自由傳遞,使得金屬離子更容易變換價(jià)態(tài),從而提高非均相Fenton降解效果。同時(shí)在材料上負(fù)載鐵銅雙金屬不僅可以增加催化活性位點(diǎn)數(shù)量,同時(shí)雙金屬的協(xié)同作用也使得金屬離子可以快速變換價(jià)態(tài),從而加速非均相Fenton反應(yīng)的快速進(jìn)行。
[Abstract]:As a new type of nano-materials, mesoporous materials have large specific surface area and pore volume, regular and adjustable pore structure. The preparation and modification of mesoporous carbon and mesoporous silicon materials have attracted great attention in the treatment of dyestuff wastewater and the removal of difficult biodegradable organic compounds. A highly efficient catalyst for the degradation of methylene blue dyes catalyzed by heterogeneous Fenton was prepared. The surface hydrophilicity of regular mesoporous carbon materials was low. Oxygen functional groups were introduced into the materials treated with hydrogen peroxide to enhance the hydrophilicity and acidity of carbon materials. The catalyst is more evenly dispersed in the solution, which promotes the contact between the catalyst and the organic molecules in the solution, thus increasing the process of heterogeneous Fenton catalytic reaction. Using bimetallic supported mesoporous silicon material, due to the synergistic effect of bimetallic, The results show that this kind of catalyst has a high degradation rate in heterogeneous Fenton catalytic degradation of dyes. The specific contents of this paper are as follows: 1. Using F127 as template, phenolic resin as carbon source, iron nitrate as Tie Yuan, Iron supported mesoporous carbon materials Fe / meso-C were prepared by chelating agent co-assembly and modified with hydrogen peroxide (labeled H-Fe / meso-Con). The results were obtained by the characterization of XRDX / TM SEM port N: adsorption-desorption isotherm. After hydrogen peroxide modification, the surface area, pore volume and pore size of the catalyst increased. The results show that the pore size of the carbon-based materials is enlarged by hydrogen peroxide etching, which is more favorable to the smooth progress of heterogeneous Fenton catalytic reaction. 2. Mesoporous silicon materials are synthesized by low temperature magnesium thermal reaction. Bimetallic Fe-CuMPSi-supported mesoporous silicon material Fe-CuMPSiwas prepared by hard template method. By means of XRDX TEM and N2 adsorption-desorption isotherms, it can be seen that the catalyst is based on the well-ordered three-dimensional pore structure. In addition, some irregular pore structures are added, which make the mesoporous silicon material exhibit larger specific surface area and pore volume than raw material SBA-15. As a semiconductor, silicon can transfer electrons freely on the material, making metal ions change valence state more easily. Therefore, the degradation efficiency of heterogeneous Fenton can be improved. At the same time, loading iron and copper bimetallic on the material can not only increase the number of catalytic active sites, but also make metal ions change valence state rapidly by the synergistic action of bimetallic ions. Thus accelerating the rapid progress of heterogeneous Fenton reaction.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：O643.36

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 沈越;;擴(kuò)散滲析—電滲析法回收鹽酸酸洗廢水中的酸和鐵[J];環(huán)境保護(hù)與循環(huán)經(jīng)濟(jì);2011年05期

2 戴琴;羅建中;唐志雄;陳定盛;岑超平;;含芳香族化合物廢氣吸收液的氧化預(yù)處理[J];廣東化工;2011年04期

3 余雙菊;;羥基自由基的特性及檢測(cè)方法比較[J];廣東化工;2010年09期

4 孟范平;易懷昌;;各種吸附材料在印染廢水處理中的應(yīng)用[J];材料導(dǎo)報(bào);2009年13期

5 迪建東;潘冠英;王利民;;厭氧—好氧工藝處理印染廢水的試驗(yàn)研究[J];工業(yè)水處理;2007年01期

6 李慶召,劉軍壇,彭偉功;啤酒廢水處理技術(shù)研究進(jìn)展[J];工業(yè)水處理;2005年04期

7 徐向榮,王文華,李華斌;Fenton試劑處理酸性染料廢水的研究[J];環(huán)境導(dǎo)報(bào);1997年06期

相關(guān)碩士學(xué)位論文 前1條

1 梁睿榮;微濾—反滲透雙膜法深度處理造紙廢水的試驗(yàn)研究[D];廣東工業(yè)大學(xué);2014年

，

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