本文選題：聚苯胺　切入點(diǎn)：摻雜　出處：《青島科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：聚苯胺(PANI)與n型半導(dǎo)體光催化劑的界面形成p-n結(jié),可提高材料的光催化性能。本文利用直接混合法制備不同酸體系的聚苯胺納米纖維,利用水熱法制備磷酸鉍(BiPO_4)、釩酸鉍(BiVO_4)光催化劑材料,利用原位復(fù)合法制備PANI光催化復(fù)合材料。采用X射線衍射儀、掃描電鏡、紫外-可見分光光度計(jì)等設(shè)備,對(duì)光催化材料的晶型結(jié)構(gòu)、形貌結(jié)構(gòu)和光學(xué)性質(zhì)進(jìn)行表征分析,以亞甲基藍(lán)染液為降解對(duì)象,探索制備條件和復(fù)合順序?qū)?fù)合材料光催化性能的影響。同時(shí)對(duì)PANI的吸附性能進(jìn)行了研究。主要研究結(jié)果如下:(1)BiPO_4存在下聚合生成PANI,形成BiPO_4/PANI復(fù)合材料,硫酸摻雜態(tài)PANI質(zhì)量比為0.5%時(shí)降解性能最優(yōu),從純BiPO_4的70%提高到83.3%。PANI存在下合成BiPO_4制備PANI/BiPO_4復(fù)合材料,磷酸摻雜態(tài)PANI質(zhì)量比為7%時(shí)降解率最優(yōu),為93.81%。(2)BiVO_4存在下聚合生成PANI,形成BiVO_4/PANI光催化材料,硫酸摻雜態(tài)PANI質(zhì)量比為0.5%時(shí)吸附性能最優(yōu),從純BiVO_4的59.8%提高到81.3%。BiVO_4/PANI進(jìn)一步與SiO_2復(fù)合形成BiVO_4/PANI/SiO_2三元材料,硫酸摻雜態(tài)PANI質(zhì)量比為1%、Si/V摩爾比為2時(shí)降解率達(dá)94.8%。(3)硫酸摻雜態(tài)PANI對(duì)甲基橙的吸附率達(dá)95.6%,吸附量為23.9mg/g,其吸附極限達(dá)到45 mg/g,并具有良好的重復(fù)利用性。本征態(tài)PANI的吸附性能差,其吸附量在6 mg/g以下。摻雜態(tài)PANI的吸附性能隨溶液pH值的減小而降低,隨溫度的升高而提高,在堿性環(huán)境中對(duì)陽離子染料具有良好的吸附效果。PANI的吸附過程符合偽一級(jí)反應(yīng)動(dòng)力學(xué)方程和Langmuir型吸附等溫模型。
[Abstract]:The p-n junction between Polyaniline (pan) and n-type semiconductor photocatalyst can improve the photocatalytic performance of the materials. In this paper, Polyaniline nanofibers with different acid systems were prepared by direct mixing method. Bismuth phosphate BiPO4 and bismuth vanadate BiVO4) photocatalyst materials were prepared by hydrothermal method, and PANI photocatalytic composite materials were prepared by in-situ composite method. X-ray diffractometer, scanning electron microscope, UV-Vis spectrophotometer and so on were used. The crystal structure, morphology and optical properties of photocatalytic materials were characterized and analyzed. The methylene blue dye solution was used as the degradation object. The effects of preparation conditions and composition sequence on the photocatalytic properties of the composites were explored. The adsorption properties of PANI were also studied. When the mass ratio of sulfuric acid doped PANI is 0.5, the degradation rate of PANI/BiPO_4 composites is the best, from 70% of pure BiPO_4 to 83.3% of pani. The degradation rate of PANI/BiPO_4 composites is the best when the mass ratio of phosphoric acid doped PANI is 7. In the presence of 93.81% BiVO4, Pani was polymerized to form BiVO_4/PANI photocatalytic material. The adsorption performance of PANI doped with sulfuric acid was optimized when the mass ratio of PANI was 0.5, which increased from 59.8% of pure BiVO_4 to 81.3%. BiVO4 / pani further compounded with SiO_2 to form BiVO_4/PANI/SiO_2 ternary material. The molar ratio of sulfuric acid doped PANI to methyl orange is 95.6 and the adsorption capacity is 23.9 mg / g, and the adsorption limit is 45 mg / g, and the reusability of PANI is good. The adsorption capacity of the doped PANI is below 6 mg/g. The adsorption performance of the doped PANI decreases with the decrease of pH value of the solution and increases with the increase of the temperature. The adsorption of cationic dyes in alkaline environment. The adsorption process of pani accords with pseudo-first-order reaction kinetics equation and Langmuir adsorption isotherm model.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X713

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本文編號(hào)：1589211