本文選題：紫外光照　切入點(diǎn)：二氧化鈦/活性碳　出處：《華中科技大學(xué)》2015年碩士論文

【摘要】：印染廢水具有組成成分復(fù)雜,難降解物質(zhì)多,濃度較大,處理難度大等特點(diǎn),是環(huán)境污染的主要來源之一。光催化技術(shù)能有效解決環(huán)境問題,其中二氧化鈦光催化劑具有光催化活性高,化學(xué)穩(wěn)定性良好,并且廉價(jià)無毒等優(yōu)點(diǎn),因而被廣泛應(yīng)用于污廢水處理、有機(jī)物降解等領(lǐng)域。然而二氧化鈦可利用光譜范圍窄,易團(tuán)聚難分離及重復(fù)利用,大大增加了處理成本。因此,研究具有高催化活性的新型TiO2光催化劑,探討其對(duì)印染廢水的光催化降解效果得到研究人員的重點(diǎn)關(guān)注。在減輕有機(jī)物污染還是保障人類生命安全都具有十分重要的意義。本文在此背景下,采用溶膠-凝膠法制備出具有較高光催化活性的復(fù)合光催化劑,通過相關(guān)技術(shù)手段對(duì)其進(jìn)行分析表征,并將其應(yīng)用于活性黃模擬印染廢水的處理研究,具體研究內(nèi)容和結(jié)果如下:首先,本文以椰殼活性炭為載體,采用溶膠-凝膠法制備活性炭負(fù)載二氧化鈦復(fù)合光催化劑,通過掃描電子顯微鏡、X射線衍射儀、傅里葉變換紅外光譜、熱重/差熱綜合分析儀、紫外-可見漫反射、X射線光電子能譜等分析手段對(duì)負(fù)載型復(fù)合光催化劑的表面形貌、晶態(tài)結(jié)構(gòu)、表面官能團(tuán)、價(jià)態(tài)及光學(xué)性能進(jìn)行表征。結(jié)果表明該法制備出的復(fù)合光催化劑具有較高的光催化性能,二氧化鈦顆粒較為均勻地負(fù)載于椰殼活性炭表面。復(fù)合光催化劑的光催化活性受制備時(shí)煅燒溫度的影響,隨著煅燒溫度的升高,銳鈦礦型二氧化鈦晶型更為完善。并且負(fù)載后的二氧化鈦在可見光區(qū)的吸收強(qiáng)度比純二氧化鈦有明顯提升。其次,本文將復(fù)合光催化劑應(yīng)用于活性黃模擬印染廢水的光催化處理中,并就復(fù)合光催化劑的投加量、印染廢水的pH值、活性黃溶液的初始濃度等因素對(duì)光催化效果的影響進(jìn)行研究,對(duì)復(fù)合光催化劑的光催化活性進(jìn)行評(píng)價(jià)。實(shí)驗(yàn)結(jié)果表明:活性炭與二氧化鈦之間存在某種協(xié)同機(jī)制,體系具有較高的光催化活性。在一定范圍內(nèi),XRG的降解率隨Ti O2/AC投加量的增加而升高,當(dāng)其投加量超過最佳投量2.0g/L時(shí),產(chǎn)生屏蔽效應(yīng);酸性條件下有利于XRG的光降解;隨著XRG初始濃度的升高,其降解率逐漸降低;雙氧水對(duì)光降解效果的影響具有兩面性;而離子強(qiáng)度的增加有利于光反應(yīng)的進(jìn)行。本文的研究成果為優(yōu)化二氧化鈦光催化劑及其光催化降解機(jī)理的研究提供了有價(jià)值的借鑒,為進(jìn)一步研究印染廢水的處理提供了新的思路和科學(xué)依據(jù)。
[Abstract]:Printing and dyeing wastewater is one of the main sources of environmental pollution due to its complex composition, high concentration, high concentration and difficulty in treatment. Photocatalytic technology can effectively solve environmental problems. Among them, titanium dioxide photocatalyst has the advantages of high photocatalytic activity, good chemical stability, cheap and non-toxic, so it is widely used in wastewater treatment, organic degradation and other fields. It is easy to agglomeration and difficult to separate and reuse, which greatly increases the cost of treatment. Therefore, a new type of TiO2 photocatalyst with high catalytic activity is studied. The study on photocatalytic degradation of printing and dyeing wastewater has attracted the attention of researchers. It is of great significance in reducing organic pollution and ensuring the safety of human life. The composite photocatalyst with high photocatalytic activity was prepared by sol-gel method. The composite photocatalyst was analyzed and characterized by related technology and applied to the treatment of reactive yellow simulated printing and dyeing wastewater. The specific research contents and results are as follows: firstly, the active carbon supported titanium dioxide composite photocatalyst was prepared by sol-gel method with coconut shell activated carbon as the carrier, and X-ray diffractometer was used by scanning electron microscope. Fourier transform infrared spectroscopy (FTIR), thermogravimetric / differential thermal analysis (TG-DTA), UV-Vis diffuse reflectance X-ray photoelectron spectroscopy (UV-Vis) and so on, were used to analyze the surface morphology, crystal structure and surface functional groups of the supported composite photocatalysts. The results show that the composite photocatalyst prepared by this method has high photocatalytic performance. The photocatalytic activity of the composite photocatalyst is affected by the calcination temperature during preparation, and with the increase of calcination temperature, the TIO _ 2 particles are loaded on the surface of the coconut shell activated carbon evenly, the photocatalytic activity of the composite photocatalyst is affected by the calcination temperature. Anatase titanium dioxide crystal form is more perfect, and the absorption intensity of loaded titanium dioxide in visible region is obviously higher than that of pure titanium dioxide. Secondly, In this paper, the composite photocatalyst was applied to the photocatalytic treatment of reactive yellow simulated printing and dyeing wastewater. The effects of the dosage of composite photocatalyst, the pH value of printing and dyeing wastewater and the initial concentration of active yellow solution on the photocatalytic effect were studied. The photocatalytic activity of the composite photocatalyst was evaluated. The experimental results showed that there was a synergistic mechanism between activated carbon and titanium dioxide. The system has higher photocatalytic activity. The degradation rate of XRG increases with the increase of Ti O2/AC dosage in a certain range. When the dosage exceeds the optimal dosage of 2.0g/L, the effect of shielding is produced, and the degradation rate of XRG is favorable to the photodegradation of XRG under acidic conditions. With the increase of initial concentration of XRG, the degradation rate decreases gradually, and the effect of hydrogen peroxide on photodegradation is dual. The increase of ionic strength is beneficial to the photoreaction. The research results in this paper provide a valuable reference for optimizing the study of titanium dioxide photocatalyst and its photocatalytic degradation mechanism. It provides a new idea and scientific basis for further research on the treatment of printing and dyeing wastewater.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X791;TB33

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 盧利平;;可利用太陽光高效轉(zhuǎn)化的新型復(fù)合光催化劑[J];功能材料信息;2008年04期

2 輝永慶,謝家理,龍素群;新型納米復(fù)合光催化劑的研究[J];四川大學(xué)學(xué)報(bào)(自然科學(xué)版);2004年03期

3 ;日科學(xué)家開發(fā)出新型復(fù)合光催化劑[J];中國有色金屬;2008年18期

4 ;日科學(xué)家開發(fā)出新型復(fù)合光催化劑[J];電子元件與材料;2009年02期

5 薩嘎拉;解秀娟;斯琴塔娜;張宇;照日格圖;;TiO_2/Fe_3O_4/AC復(fù)合光催化劑的制備及其光催化活性研究[J];內(nèi)蒙古師范大學(xué)學(xué)報(bào)(自然科學(xué)漢文版);2009年02期

6 王敏;陳平;熊闖;;聚硅硫酸鈦制備復(fù)合光催化劑及降解甲基橙的研究[J];化學(xué)工程師;2012年03期

7 王巖玲;王俊恩;葛艷秋;;Bi_2Fe_4O_9/TiO_2復(fù)合光催化劑的制備及光催化性能[J];安徽農(nóng)業(yè)科學(xué);2013年07期

8 張新榮,楊平,趙夢(mèng)月;玻璃微球附載復(fù)合光催化劑降解有機(jī)磷農(nóng)藥[J];鄭州工業(yè)大學(xué)學(xué)報(bào);1999年01期

9 周化嵐;鄒忠;吳莎;施文健;;核殼型復(fù)合光催化劑的研究進(jìn)展[J];材料導(dǎo)報(bào);2010年17期

10 葉芳云;楊露;劉鵬;;Ag/AgBr/TiO_2/AC復(fù)合光催化劑的制備及其性能研究[J];廣州化工;2011年10期

相關(guān)會(huì)議論文 前10條

1 張敬暢;高玲玲;曹維良;;超臨界流體干燥法制備新型TiO_2-CeO_2-SiO_2三元納米復(fù)合光催化劑及其光催化性能研究[A];中國硅酸鹽學(xué)會(huì)2003年學(xué)術(shù)年會(huì)論文摘要集[C];2003年

2 馮妍;吳青松;張國英;;Fe_2O_3/Bi_2WO_6復(fù)合光催化劑的制備及性能[A];第六屆全國物理無機(jī)化學(xué)會(huì)議論文摘要集[C];2012年

3 王凱;徐志堅(jiān);韓一丹;底蘭波;張秀玲;;離子液體助TiO_2-CoFe_2O_4磁性復(fù)合光催化劑的制備[A];第十三屆全國太陽能光化學(xué)與光催化學(xué)術(shù)會(huì)議學(xué)術(shù)論文集[C];2012年

4 李霞;江國華;唐柏林;魏征;王小紅;;CF/N-doped BiOBr復(fù)合光催化劑的制備及性能研究[A];第十四屆全國青年催化學(xué)術(shù)會(huì)議會(huì)議論文集[C];2013年

5 孫勇;房晶瑞;王魯東;;導(dǎo)電高分子/無機(jī)半導(dǎo)體復(fù)合光催化劑的研究進(jìn)展[A];第七屆中國功能材料及其應(yīng)用學(xué)術(shù)會(huì)議論文集（第2分冊(cè)）[C];2010年

6 李長江;王勝平;鞏金龍;;磷酸銀-釩酸鉍復(fù)合光催化劑的制備與性能研究[A];第十四屆全國青年催化學(xué)術(shù)會(huì)議會(huì)議論文集[C];2013年

7 叢野;龍梅;秦云;李軒科;;以炭黑為反應(yīng)性模板制備二氧化鈦/炭黑復(fù)合光催化劑[A];第十三屆全國太陽能光化學(xué)與光催化學(xué)術(shù)會(huì)議學(xué)術(shù)論文集[C];2012年

8 張荷美;宋秀芹;;ZnO/TiO_2復(fù)合光催化劑的制備及其光催化性能研究[A];中國化學(xué)會(huì)第十二屆膠體與界面化學(xué)會(huì)議論文摘要集[C];2009年

9 曹暮寒;吳建成;皋銀銀;敖燕輝;;磁性石墨烯負(fù)載二氧化鈦復(fù)合光催化劑的制備及光催化性能研究[A];第十三屆全國太陽能光化學(xué)與光催化學(xué)術(shù)會(huì)議學(xué)術(shù)論文集[C];2012年

10 李繪;張曉艷;崔曉莉;;火熱法制備嵌碳TiO_2-SiO_2復(fù)合光催化劑[A];第十三屆全國太陽能光化學(xué)與光催化學(xué)術(shù)會(huì)議學(xué)術(shù)論文集[C];2012年

相關(guān)重要報(bào)紙文章 前1條

1 葛進(jìn);日科學(xué)家開發(fā)出新型復(fù)合光催化劑[N];科技日?qǐng)?bào);2008年

相關(guān)博士學(xué)位論文 前10條

1 羅利軍;具有吸附/光催化協(xié)同功能的二氧化鈦復(fù)合光催化劑的制備及去除雙酚A的研究[D];昆明理工大學(xué);2015年

2 于秀娜;基于抗生素廢水降解的微/納米復(fù)合光催化材料的制備及降解機(jī)理研究[D];江蘇大學(xué);2015年

3 劉棟;二氧化鈦/氮化硼復(fù)合光催化劑的制備及光催化性能的研究[D];河北工業(yè)大學(xué);2014年

4 徐W，

本文編號(hào)：1667351