本文關(guān)鍵詞： 水熱輔助溶膠-凝膠法 多孔材料 一維材料 強(qiáng)堿復(fù)合材料 制備　出處：《華南理工大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：本文以勃姆石合成的鋁溶膠為鋁源,以硅酸鈉制備出的硅溶膠為硅源,采用水熱輔助溶膠-凝膠的化學(xué)方法,制備出顆粒狀多孔性、長(zhǎng)方體多孔性及一維狀三種不同形貌的硅鋁酸鹽納米材料,三種納米材料的形貌規(guī)整、顆粒小而均勻、比表面積大、堿性強(qiáng)、熱穩(wěn)定,并研究了煅燒時(shí)間及煅燒溫度對(duì)固體樣品的形貌及結(jié)晶度的影響,確定了三種不同形貌硅鋁酸鹽納米材料的制備工藝條件。本文還研究了以第三章合成的硅鋁酸鹽材料為基礎(chǔ),采用了共生法的摻雜方式,以KNO3對(duì)其進(jìn)行摻雜增強(qiáng)其堿性的研究,合成了堿性更強(qiáng)、堿量更大、晶型規(guī)整、堿強(qiáng)度中心更加專(zhuān)一的強(qiáng)堿性硅鋁酸鹽復(fù)合材料。并系統(tǒng)地研究了堿性改良劑的種類(lèi)、摻雜量、摻雜方式、煅燒時(shí)間、煅燒溫度等工藝參數(shù)對(duì)硅鋁酸鹽復(fù)合材料堿性的影響,得到了制備強(qiáng)堿性硅鋁酸鹽復(fù)合材料的優(yōu)化工藝條件為:堿性改良劑為KNO3,摻雜量為7.5%,摻雜方式為共生法,煅燒溫度為600℃,煅燒時(shí)間為14 h。采用X射線衍射分析(XRD)、X射線熒光分析(XRF)、電子掃描顯微鏡(SEM)、Hammett指示劑法、苯甲酸-氫氧化鈉返滴定法、CO2程序升溫脫附(CO2-TPD)、傅里葉變換紅外光譜(FTIR)、熱重-差示掃描量熱法(TG-DSC)等表征方法,系統(tǒng)地研究了三種不同形貌的硅鋁酸鹽納米材料及硅鋁酸鹽復(fù)合材料的結(jié)構(gòu)、組成及性能。
[Abstract]:In this paper, the granular porous properties were prepared by hydrothermal assisted sol-gel chemical method using the aluminum sol synthesized by Bohm stone as the aluminum source and the silica sol prepared by sodium silicate as the silicon source. Cuboid porous and one-dimensional three different morphology of aluminate nanomaterials, the morphology of the three nanomaterials, small and uniform particles, large surface area, strong alkaline, thermal stability. The effects of calcination time and calcination temperature on the morphology and crystallinity of solid samples were studied. The preparation conditions of three kinds of aluminosilicate nanomaterials with different morphologies were determined. Based on the aluminosilicate materials synthesized in Chapter 3, the doping method of symbiosis was adopted. The alkalinity was enhanced by doping with KNO3. The results showed that the alkalinity was stronger, the amount of alkali was larger, and the crystal structure was regular. The alkali strength center is more specific to the strong alkaline aluminosilicate composite. The types, doping amount, doping mode and calcination time of alkaline modifier are systematically studied. The effect of calcination temperature on the alkalinity of aluminosilicate composites was studied. The optimized process conditions were obtained as follows: the basic modifier was KNO3 and the doping amount was 7.5%. The doping method is symbiosis method, calcination temperature is 600 鈩，

本文編號(hào)：1447860