本文選題：分級結(jié)構(gòu)　切入點：勃姆石　出處：《重慶理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文采用無模板水熱法,成功制備出核桃狀、葉片狀和大白菜狀三種不同形貌的γ-AlOOH分級結(jié)構(gòu)及核桃狀γ-AlOOH/石墨烯、大白菜狀γ-AlOOH/石墨烯、γ-AlOOH/α-Fe2O3三種復(fù)合納米材料。對所制備材料進行了表征,并研究了它們對有機染料和重金屬離子的吸附性能。主要研究內(nèi)容如下:1、以尿素為均相沉淀劑、Al(NO3)3?9H2O為鋁源,采用不同反應(yīng)條件的水熱法成功地制備出了形貌和尺寸均一的葉片狀、核桃狀和大白菜狀三種不同形貌的γ-AlOOH分級結(jié)構(gòu)。實驗結(jié)果表明:三種分級結(jié)構(gòu)都是由納米纖維自組裝而成的,且葉片狀、核桃狀和大白菜狀γ-AlOOH對Cr(VI)的最大吸附質(zhì)量分別為7.4mg/g、32.16mg/g和14.36mg/g;對甲基橙的最大吸附質(zhì)量分別為59.9mg/g、97.15mg/g和84.93mg/g;對剛果紅的最大吸附質(zhì)量分別為99.0mg/g、98.8mg/g和258.02mg/g。2、通過一步水熱法成功制備出了核桃狀γ-AlOOH/石墨烯的納米復(fù)合材料。實驗結(jié)果表明:只有石墨烯的加入量為1%和2.5%時,所得產(chǎn)物才為分級結(jié)構(gòu)γ-AlOOH與石墨烯的復(fù)合產(chǎn)物;加入1%石墨烯所得的核桃狀γ-AlOOH/石墨烯復(fù)合材料對Cr(VI)和剛果紅的吸附性能最好,最大吸附質(zhì)量分別為41.74 mg/g(pH=2)和99.2mg/g,都高于單相γ-AlOOH對Cr(VI)(35.86 mg/g,pH=2)和剛果紅(97.15mg/g)的吸附性能。3、通過一步水熱法成功制備出了大白菜狀γ-AlOOH/石墨烯的納米復(fù)合材料。實驗結(jié)果表明:加入1%石墨烯所得的γ-AlOOH/石墨烯復(fù)合材料對Cr(VI)的吸附性能最好,最大吸附質(zhì)量為17.32 mg/g(pH=2),高于單相γ-AlOOH對Cr(VI)(14.61mg/g,pH=2)的吸附性能。而加入2.5%石墨烯所得的γ-AlOOH/石墨烯復(fù)合材料對酸性鉻藍(lán)K的吸附性能最好,最大吸附質(zhì)量為99.69mg/g,高于單相γ-AlOOH對酸性鉻藍(lán)K的最大吸附質(zhì)量(54.05mg/g)近一倍。同時這兩種復(fù)合材料對剛果紅都表現(xiàn)出優(yōu)異的吸附性能。4、通過一步水熱法合成了γ-AlOOH/α-Fe2O3復(fù)合納米材料。實驗結(jié)果表明:反應(yīng)體系中尿素摩爾量的增加和鋁源/鐵源摩爾比的較少,都會使復(fù)合產(chǎn)物中α-Fe2O3相的百分比在增加;反應(yīng)體系中尿素摩爾量為28.8mmol時所得復(fù)合材料對酸性鉻藍(lán)K和剛果紅吸附效果最好,最大吸附質(zhì)量為42.92和99.19mg/g;反應(yīng)體系中所得復(fù)合材料對酸性鉻藍(lán)K和剛果紅吸附效果最好的鋁源/鐵源摩爾比分別為2:1和10:1,其最大吸附質(zhì)量分別為65.09mg/g和99.19mg/g,都要好于單相γ-AlOOH和單相α-Fe2O3的吸附性能。
[Abstract]:In this paper, three different morphologies, walnut shape, leaf shape and Chinese cabbage shape, were successfully prepared by using template free hydrothermal method, and the walnut shape 緯 -AlOHH / graphene was prepared. Three kinds of composite nanomaterials, 緯 -AlOH / graphene and 緯 -AlOOH / 偽 -Fe _ 2O _ 3, were prepared and characterized, and their adsorption properties for organic dyes and heavy metal ions were studied. 9H2O was used as aluminum source, and the blade shape with uniform morphology and size was successfully prepared by hydrothermal method under different reaction conditions. The experimental results show that the three grading structures are all self-assembled from nanofibers, and the leaves are similar to each other in the shape of leaves, and the morphology of 緯 -AlOOH is similar to that of walnut and Chinese cabbage. The maximum adsorption mass of walnut and cabbage-like 緯 -AlOOH for CrVI was 7.4 mg / g and 14.36 mg / g respectively; for methyl orange was 59.9 mg / g 97.15 mg / g and 84.93 mg / g respectively; for Congo red was 99.0 mg / g / g 898.g / g and 258.02 mg / g 路2, respectively; and for Congo red was 99.0 mg / g / g ~ 898.g / g and 258.02 mg / g / g, respectively, and the maximum adsorption mass for methyl orange was 59.9 mg / g / g ~ 97.15 mg / g / g and 84.93 mg / g / g / g, respectively, and the maximum adsorption mass of Congo red was 99.0 mg / g / g / g and 258.02 mg / g 路2 respectively. Walnut 緯 -AlOOH / graphene nanocomposites were prepared. The experimental results showed that only 1% and 2.5 graphene were added. The obtained product was the composite product of graded 緯 -AlOOH and graphene, and the walnut 緯 -AlOOH / graphene composite with 1% graphene had the best adsorption properties for CrVI and Congo red. The maximum adsorption mass was 41.74 mg / g pH ~ (2) and 99.2 mg / g, respectively, which were higher than those of 緯 -AlOOH for Cr(VI)(35.86 mg / g ~ (2) and Congo Red ~ (97. 15 mg / g). The 緯 -AlOHH / graphene nanocomposites were successfully prepared by one step hydrothermal method. The experimental results showed that:. The 緯 -AlOOH / graphene composite containing 1% graphene has the best adsorption property for CrVI. The maximum adsorption mass of 緯 -AlOOH is 17.32 mg 路g ~ (-1) pH ~ (-2), which is higher than that of single phase 緯 -AlOOH (14.61 mg / g ~ (2)). The 緯 -AlOH / graphene composite with 2.5% graphene has the best adsorption performance for acid chrome blue K, and the adsorption capacity of 緯 -AlOH / graphene composite is better than that of single phase 緯 -AlOOH (14.61 mg / g 路g ~ (-2)). The maximum adsorption mass is 99.69 mg / g, which is nearly twice as high as that of single-phase 緯 -AlOOH for acidic chrome blue K (54.05 mg / g). At the same time, both composites exhibit excellent adsorption properties for Congo red. The 緯 -AlOOH / 偽 -Fe _ 2O _ 3 composite nanowires were synthesized by one-step hydrothermal method. Rice materials. The experimental results show that the increase of urea molar amount and the molar ratio of aluminum source to Tie Yuan in the reaction system are less than that in the reaction system. The percentage of 偽 -Fe _ 2O _ 3 phase in the composite product was increased, and the adsorption of acid chrome blue K and Congo red was the best when the molar ratio of urea in the reaction system was 28.8mmol. The maximum adsorption mass is 42.92 and 99.19 mg / g respectively. The molar ratio of aluminum source / Tie Yuan, which has the best adsorption efficiency for acid chrome blue K and Congo red, is 2: 1 and 10: 1, respectively. The maximum adsorption mass is 65.09 mg / g and 99.19 mg / g / g, respectively, which is better than that of single Cr blue K and Congo Red. The adsorption properties of 緯 -AlOOH and 偽 -Fe _ 2O _ 3 were investigated.
【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】：TB33

【共引文獻】

相關(guān)期刊論文 前1條

1 李海軍;張霞;孫海天;;納米TiO_2薄膜對痕量Cu(Ⅱ)的吸附研究[J];東北大學(xué)學(xué)報(自然科學(xué)版);2011年11期

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本文編號：1579593