本文關(guān)鍵詞：多孔分級結(jié)構(gòu)AlOOH的無模板水熱制備及吸附性能研究　出處：《重慶理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 分級結(jié)構(gòu) 勃姆石 水熱法 無機(jī)鹽 吸附性能

【摘要】：本文以無機(jī)鹽作為沉淀劑、硝酸鋁作為鋁源,采用無模板水熱法制備得到不同形貌的多孔分級結(jié)構(gòu)勃姆石材料。研究了制備得到的勃姆石對有機(jī)染料的吸附性能。主要研究內(nèi)容和結(jié)果如下:以碳酸氫鈉和硝酸鋁為原料進(jìn)行水熱反應(yīng),研究了碳酸氫鈉濃度、硝酸鋁濃度對產(chǎn)物形貌的影響。當(dāng)硝酸鋁濃度為10mmol,碳酸氫鈉添加量為10mmol,在190℃下反應(yīng)24h制備得到整體尺寸長約1.4μm,寬約0.7μm的形貌均一、分散性較好的橢圓狀分級結(jié)構(gòu)AlOOH材料。以草酸鈉和硝酸鋁為原料進(jìn)行水熱反應(yīng),研究了草酸鈉添加量對產(chǎn)物形貌的影響。草酸鈉為2mmol時,制備得到了由納米窄片組裝成的長度為1.7-2.2μm,寬度為0.8-1μm空心橢圓狀分級結(jié)構(gòu)。以磷酸氫二鈉和硝酸鋁為原料進(jìn)行水熱反應(yīng),研究了磷酸氫二鈉添加量對產(chǎn)物形貌的影響。磷酸氫二鈉為1mmol時,制備了結(jié)構(gòu)形貌趨于單一、分散性良好,長度為3.3-4.0μm,兩端寬度約為2.0μm,中間寬度約為1.1μm的連體捆束狀分級結(jié)構(gòu)勃姆石。以磷酸鈉和硝酸鋁為原料進(jìn)行水熱反應(yīng),研究了磷酸鈉添加量對產(chǎn)物形貌的影響。磷酸鈉為1mmol時,產(chǎn)物結(jié)構(gòu)呈連體捆束形狀,其結(jié)構(gòu)形貌趨于單一、分散性良好,長度約為2.5-3.3μm,寬度約0.9-1.6μm。分級結(jié)構(gòu)勃姆石的形成機(jī)理為,水熱過程中,無機(jī)鹽水解為游離態(tài)的鋁離子提供出氫氧根離子生成氫氧化鋁膠體,氫氧化鋁膠體經(jīng)溶解再結(jié)晶后形成勃姆石形態(tài)。勃姆石表面因吸附無機(jī)鹽陰離子,改變了其表面的能量,生長方向發(fā)生改變。同時無機(jī)鹽陰離子降低勃姆石粒子間的斥力,勃姆石在范德華力的作用下組裝在一起,形成分級結(jié)構(gòu)。利用制備的勃姆石對有機(jī)染料進(jìn)行吸附實驗,研究其吸附性能。結(jié)果表明勃姆石對剛果紅表現(xiàn)出良好的吸附性能。對于碳酸氫體系,橢圓狀分級結(jié)構(gòu)產(chǎn)物表現(xiàn)出對剛果紅的最大吸附量為97.9mg/g;對于草酸鈉體系,添加量為2mmol得到的中空橢圓狀分級結(jié)構(gòu)對剛果紅的最大吸附量為99mg/g;對于磷酸氫二鈉體系,磷酸氫二鈉添加量為0.5mmol得到的捆束狀分級結(jié)構(gòu)產(chǎn)物對剛果紅的最大吸附量為98.6mg/g;對于磷酸鈉體系,磷酸鈉添加量為0.1mmol得到的捆束狀分級結(jié)構(gòu)產(chǎn)物對剛果紅的最大吸附量為99.4mg/g。對于其它染料,制備的勃姆石對酸性鉻蘭K具有一定的吸附能力,對于亞甲基藍(lán)則不具有吸附能力。
[Abstract]:In this paper, inorganic salts as agents, aluminum nitrate precipitation as aluminum source, using the template free hydrothermal preparation of different morphology porous hierarchical structure of boehmite materials. Study on the adsorption properties of the prepared boehmite for organic dyes. The main research contents and results are as follows: hydrothermal reaction is carried out with sodium bicarbonate and aluminum nitrate as raw materials, and the effects of sodium bicarbonate concentration and aluminum nitrate concentration on the morphology of products are studied. When the concentration of aluminum nitrate is 10mmol, the amount of sodium bicarbonate is 10mmol, and the reaction is 24h at 190 24h, the elliptical graded AlOOH material with uniform size and good dispersion is obtained, which has a size of about 1.4 m and a width of 0.7 m. The effects of sodium oxalate and aluminum nitrate on the morphology of the products were studied with sodium oxalate and aluminum nitrate as raw materials. When sodium oxalate is 2mmol, the structure of a hollow elliptical structure with a length of 1.7-2.2 mu m and a width of 0.8-1 mu m is obtained. The hydrothermal reaction was carried out with sodium hydrogen phosphate two and aluminum nitrate as raw materials. The effect of the addition of two sodium phosphate on the morphology of the products was studied. Two sodium hydrogen phosphate 1mmol, preparation of the structure tends to be single, good dispersion, length 3.3-4.0 m, width of both ends is about 2 m, the middle width is about 1.1 m conjoined bundle hierarchical structure of boehmite. The effects of sodium phosphate and sodium nitrate on the morphology of the products were studied with sodium phosphate and aluminum nitrate as raw materials. When sodium phosphate is 1mmol, the structure of the product is conjoined bundles. Its structure tends to be single, and its dispersion is good, the length is about 2.5-3.3 mu m, and the width is about 0.9-1.6 mu m. The formation mechanism of the hierarchical structure of boehmite, hydrothermal process, provide a hydroxyl ion generating inorganic salt solution for aluminum aluminum hydroxide colloid free metal ion, aluminum hydroxide colloid was dissolved after recrystallization formed boehmite morphology. Boehmite surface due to adsorption of anions, change the surface energy, the growth direction of change. At the same time reduce the boehmite particles of inorganic salt anion repulsion effect, boehmite in the van Edward assembled together to form a hierarchical structure. The organic dye adsorption experiments were carried out using the preparation of boehmite on its adsorption properties. The results show that boehmite on Congo red showed good adsorption properties. For the system of hydrogen carbonate, elliptical hierarchical structure product showed the maximum adsorption of Congo red was 97.9mg/g; the sodium oxalate system, the maximum adsorption capacity of hollow oval shaped hierarchical structure was added into 2mmol to the Congo red 99mg/g; for two sodium hydrogen phosphate system, the maximum adsorption capacity of two hierarchical structure product bundle sodium hydrogen phosphate was added to 0.5mmol to get to Congo red 98.6mg/g; for sodium phosphate system, the maximum adsorption capacity of hierarchical structure of product bundle sodium additives for 0.1mmol to get to Congo red 99.4mg/g. For other dyes, preparation of boehmite has certain adsorption ability of acid chrome blue K, for there is no adsorption capacity of methylene blue.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X703;TB383.4

【二級參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 竇曉文;林小琴;張華靈;戚文珍;劉念;吳宏海;;非均相Fenton法降解水中橙黃G的研究[J];安徽農(nóng)業(yè)科學(xué);2011年09期

2 張志峰,何晨燕;印染廢水的回用現(xiàn)狀和技術(shù)發(fā)展[J];北方環(huán)境;2003年04期

3 徐景峰;;復(fù)合吸附劑對印染廢水的脫色性能研究[J];常州工程職業(yè)技術(shù)學(xué)院學(xué)報;2009年01期

4 田維;張洪林;蔣林時;;光-Fenton試劑協(xié)同TiO_2對苯酚廢水降解加速作用的研究[J];長春理工大學(xué)學(xué)報;2006年02期

5 鄭紅艾;張大全;潘理黎;;臭氧處理工業(yè)廢水新進(jìn)展[J];上海電力學(xué)院學(xué)報;2006年03期

6 吳偉;吳程程;趙雅萍;;非均相Fenton技術(shù)降解有機(jī)污染物的研究進(jìn)展[J];環(huán)境科學(xué)與技術(shù);2010年06期

7 譚力紅;吸附法處理印染廢水的研究[J];廣東化工;2000年04期

8 劉國安;韓建勛;陳書芹;;Fenton試劑在廢水處理中的研究[J];廣東化工;2012年02期

9 何芳;侯翠榮;黃海東;胡文容;;固定化高效混合菌好氧處理印染廢水的研究[J];中國給水排水;2006年09期

10 韓月;盧徐節(jié);陳方雨;李群嬌;;印染廢水處理技術(shù)現(xiàn)狀研究[J];工業(yè)安全與環(huán)保;2008年07期

相關(guān)博士學(xué)位論文 前1條

1 王廣華;ClO_2耦合超聲波破解污泥溶出機(jī)理與微生物隱性生長的污泥減量研究[D];華南理工大學(xué);2011年

，

本文編號：1339415