【摘要】：論文的主要研究?jī)?nèi)容包括：1、本論文的前驅(qū)體是鈦酸四丁酯,硝酸作pH調(diào)節(jié)劑,溶劑為無(wú)水乙醇,抑制劑為乙酰丙酮,并加入適量去離子水,模板劑選用雙十六烷基二甲基溴化銨,采用溶膠-凝膠法在室溫下制備介孔TiO2。通過(guò)大量實(shí)驗(yàn)總結(jié)出了制備穩(wěn)定溶膠的工藝條件及影響介孔Ti02光催化性能的主要因素。并對(duì)其結(jié)構(gòu)和形貌進(jìn)行X射線衍射(XRD)、物理氮?dú)馕搅�、掃描電子顯微鏡(SEM)等表征。2、以六水硝酸鈰為鈰源進(jìn)行摻雜,以六水硝酸釤為釤源進(jìn)行摻雜,采用溶膠-凝膠法進(jìn)行稀土元素?fù)诫s改性,制備出了高活性的鈰摻雜介孔Ti02、釤摻雜介孔Ti02半導(dǎo)體材料,利用羅丹明B為目標(biāo)污染物,研究不同摻雜量、焙燒時(shí)間、焙燒溫度對(duì)光催化性能的影響,對(duì)其進(jìn)行光催化效果評(píng)價(jià)。采用X射線衍射、掃描電子顯微鏡、物理氮?dú)馕搅康仁侄螌?duì)其進(jìn)行表征。結(jié)果表明：所制得樣品均為銳鈦礦相二氧化鈦,摻雜后的光催化劑對(duì)羅丹明B降解效果有了明顯的增強(qiáng),表明摻雜鈰、釤的介孔二氧化鈦對(duì)染料廢水的處理能力大大加強(qiáng)。3、在以上實(shí)驗(yàn)的基礎(chǔ)上,采用改性的溶膠-凝膠法制備出了高活性的鈰、釤共摻雜介孔二氧化鈦光催化劑,利用羅丹明B為目標(biāo)污染物,研究不同摻雜量對(duì)光催化性能的影響,對(duì)其進(jìn)行光催化效果評(píng)價(jià)。采用X射線衍射儀、掃描電子顯微鏡、X熒光光譜儀(XRF)等手段對(duì)其進(jìn)行表征。結(jié)果表明：所制得樣品均為銳鈦礦相二氧化鈦,摻雜后的光催化劑對(duì)羅丹明B降解效果有了明顯的增強(qiáng),表明了鈰、釤共摻雜的介孔二氧化鈦對(duì)染料廢水的處理能力大大加強(qiáng)。4、經(jīng)過(guò)以上實(shí)驗(yàn)遴選出最佳制備工藝路線,并在此工藝路線下進(jìn)行放大實(shí)驗(yàn)。取銀川某印染廠的染料廢水進(jìn)行光催化氧化降解,通過(guò)測(cè)定化學(xué)需氧量(COD)來(lái)計(jì)算降解率對(duì)其進(jìn)行光催化降解效果評(píng)定。并采用物理氮?dú)馕搅俊呙桦娮语@微鏡等手段對(duì)放大樣品進(jìn)行表征。結(jié)果表明：在放大工藝下所制得樣品對(duì)羅丹明B降解效果相對(duì)較弱,表明了放大效應(yīng)對(duì)催化劑催化氧化處理染料廢水的能力具有很大影響,具體影響因素及各因素影響強(qiáng)度還有待進(jìn)一步研究。
[Abstract]:The main contents of this paper include: 1. The precursor of this thesis is tetrabutyl titanate, nitric acid as pH regulator, solvent as anhydrous ethanol, inhibitor as acetylacetone, and proper amount of deionized water. Mesoporous TiO2. was prepared by sol-gel method at room temperature using didecaalkyl dimethylammonium bromide as template. The process conditions of preparing stable sol and the main factors affecting the photocatalytic performance of mesoporous Ti02 were summarized through a large number of experiments. The structure and morphology were characterized by X-ray diffraction (XRD) (XRD), physical nitrogen adsorption, scanning electron microscopy (SEM) (SEM), and doping with cerium nitrate hexahydrate as cerium source and samarium nitrate hexahydrate as samarium source. High activity cerium doped mesoporous Ti02, samarium doped mesoporous Ti02 semiconductors were prepared by using sol-gel method to modify rare earth elements. Rhodamine B was used as the target pollutant to study the different doping amount and calcination time. The effect of calcination temperature on photocatalytic performance was evaluated. It was characterized by X-ray diffraction, scanning electron microscope and physical nitrogen adsorption. The results showed that all the samples were anatase phase TIO _ 2, and the degradation effect of rhodamine B was obviously enhanced by doped photocatalyst. The treatment ability of mesoporous TIO _ 2 of samarium to dye wastewater was greatly enhanced. On the basis of above experiments, highly active cerium and samarium co-doped mesoporous TIO _ 2 photocatalysts were prepared by modified sol-gel method. Using Rhodamine B as the target pollutant, the effect of different doping amount on photocatalytic performance was studied, and the photocatalytic effect of Rhodamine B was evaluated. It was characterized by X-ray diffractometer, scanning electron microscope (SEM) and X-fluorescence spectrometer (XRF). The results showed that all the samples were anatase phase TIO _ 2, and the degradation effect of rhodamine B was obviously enhanced by doped photocatalyst. The treatment of dye wastewater with samarium co-doped mesoporous titanium dioxide has been greatly enhanced. The best preparation process has been selected through the above experiments and the amplification experiments have been carried out under this process. The dye wastewater from a printing and dyeing factory in Yinchuan was degraded by photocatalytic oxidation, and the photocatalytic degradation effect was evaluated by determining the chemical oxygen demand (COD) to calculate the degradation rate. The amplified samples were characterized by physical nitrogen adsorption and scanning electron microscopy. The results showed that the degradation effect of Rhodamine B was relatively weak, which indicated that the amplification effect had a great influence on the catalytic oxidation of dye wastewater. The specific influencing factors and the influence intensity of each factor still need to be further studied.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X791;O643.36

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本文編號(hào)：2260215