【正文】 、電子空穴對的復(fù)合幾率、表面活性和實(shí)驗(yàn)條件。 納米Bi2O3 / TiO2光催化劑對多種水溶性染料的降解試驗(yàn)為了考察納米Bi2O3 / TiO2光催化劑對其它水溶性染料脫色均有可行性，可以固定復(fù)合光催化劑的用量，分別與相同初始濃度的不同染料溶液混合用紫外燈照射，結(jié)果表明復(fù)合光催化劑對多種水溶性染料均有較好處理效果，光照一定時(shí)間溶液均會褪至無色，染料的脫色率達(dá)到很高的水平[14,15,16]。在加深對光催化氧化技術(shù)的基礎(chǔ)上，與其它技術(shù)的配合，將會開拓更廣闊的應(yīng)用前景。全部轉(zhuǎn)移到反應(yīng)釜后置于高溫高壓下恒溫2h并降壓后過濾得到樣品，在烘箱烘干2h后所得樣品既是納米Bi2O3/TiO2復(fù)合光催化劑。表21 水和乙醇配比對光催化活性影響水和乙醇配比2：14：16：1k/min1RD/%(60min)由表21可見，稀釋劑乙醇的量對樣品的光催化性能有較大影響，當(dāng)水和乙醇的比例為4：1時(shí)所得樣品的光催化效果最好。表22 不同摻雜量的顆粒尺寸和光催化活性摻雜量TiO2%Bi2O3 / TiO2%Bi2O3 / TiO2%Bi2O3 / TiO2粒徑/nm k/min1RD/%(60min) Bi2O3與TiO2復(fù)合可能主要是引起TiO2表面Ti3+的增加，即晶格中氧缺位增加，這會提高催化劑對氧的吸附能力，進(jìn)而提高TiO2催化劑的光催化活性。%時(shí)，光催化活性反而下降，這是因?yàn)殂G半徑較大而可能以氧化物形式富集在TiO2表面，但是當(dāng)摻雜量超過一定值時(shí)，過多的鉍氧化物沉積在TiO2表面，阻礙了電子和空穴向催化劑表面的傳遞，TiO2表面鉍氧化物成為電荷載流子的復(fù)合中心，導(dǎo)致催化劑活性降低[18,19,20]。第3章 二氧化鈦對羅丹明B的光催化脫色實(shí)驗(yàn)光催化脫色試驗(yàn)是在斯東柯SGY1型多功能光反應(yīng)儀中進(jìn)行。在起始濃度為100mg/L的羅丹明B染料溶液中按照0g/L、用125W紫外燈照射，定時(shí)取樣分析，結(jié)果如圖31所示。另外，脫色反應(yīng)大多符合假一級動力學(xué)方程，反應(yīng)的動力學(xué)方程和半衰期如表31所示。（2）%時(shí)樣品的光催化性能較好，%時(shí)，光催化活性下降。謝 辭在即將結(jié)束畢業(yè)設(shè)計(jì)之際，感謝***老師在實(shí)驗(yàn)方面給予的指導(dǎo)和幫助，實(shí)驗(yàn)過程中的各個(gè)環(huán)節(jié)到最后的論文撰寫，都是在陳老師的悉心指導(dǎo)和關(guān)懷下完成的。再次衷心的感謝所有幫助過我的同學(xué)和老師，使我能夠集中精力順利完成論文，謝謝大家！參考文獻(xiàn)[1]高濂, 鄭珊, 張青紅. 納米氧化鈦光催化材料及應(yīng)用[M]. 北京: 化學(xué)工業(yè)出版社, 2002: 39114[2]方世杰, 徐明霞. 納米TiO2光催化劑的制備方法[J]. 硅酸鹽通報(bào), 2002(2), 38 [3]張梅, 陸路德. 納米TiO2—一種性能優(yōu)良的光催化劑[J]. 化工新型材料, 2000, 28 (4), 1113[4]肖文勝, 李文洪. 溶膠凝膠法合成TiO2納米粉體及光催化活性研究[J]. 河南科學(xué), 2006, 10(5), 648651[5]趙文寬. 高熱穩(wěn)定性銳鈦礦型TiO2納米粉體的制備[J]. 無機(jī)材料學(xué)報(bào), 1998, 13(40), 608612[6]蔣玉龍, 王智宇, 唐培松等. 量子尺寸納米TiO2的水熱制備及光催化性能 [J]. 浙江大學(xué)學(xué)報(bào), 2005, 3(39), 440444[7]倪星元, 沈軍等. 納米材料的理化特性與應(yīng)用[M]. 北京: 化學(xué)工業(yè)出社, 2006: 9[8]張昭, 彭少方, 劉棟昌. 無機(jī)精細(xì)化工工藝學(xué)[M]. 第二版. 北京: 化學(xué)工業(yè)出版社, 2005: 116117[9]張立德, 牟季美. 納米材料與納米結(jié)構(gòu)[M]. 北京科學(xué)出版社, 2001: 135138 [10]倪星元, 沈軍等. 納米材料的理化特性與應(yīng)用[M]. 北京: 化學(xué)工業(yè)出版社, 2006: 116120[11]陳琦麗, 唐超群, 肖循等. 二氧化鈦納米晶的制備及光催化活性研究[J]. 材料科學(xué)與工程學(xué)報(bào), 2003, 21(4), 518520[12]曲長紅. 不同結(jié)構(gòu)納米二氧化鈦的制備及其物性研究: [碩士研究生論文].吉林: 吉林大學(xué), 2006[13]李志軍, 王紅英. 納米二氧化鈦的制備方法[J]. 山西化工, 2006, 26(2), 4749[14]施爾畏. 水熱法的應(yīng)用與發(fā)展[J]. 無機(jī)材料學(xué)報(bào), 1996, 11(2), 193198[15]陳德明, 王亭杰, 雨山江等. 納米TiO2的性能、應(yīng)用及制備方法[J]. 材料工程, 2002(11), 4247[16]李慧泉, 李越湘, 周新木等. 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The hydrothermal preparation and characterization of TiO2 nanomaterials are discussed. The photocatalyzed mechanism of TiO2 nanomaterials under UV and visible light and their usages are described in this paper.KEY WORDS: TiO2 nanometer material。 research progressPhotocatalysis material is that even, visible light irradiates go down untying chemistry matter of all kinds or kill once resemble having photocatalysis activity , being able to in the purple outside up bacterium39。 By having changed condition , preparation board titanium ore type TiO2 nanometer material。(Lambda is Cu target wavelength nm, the beta is that the peak is partly broad, the theta is that the angle of diffraction, dare grain diameter size). The BET technology, the TiO2 pore surface area and the hole volume available BET technology (Brunauer Emmett Teller) analyzes determines。 That ultraviolet brightness irradiates the hole (h +) but oxide organic arousing creation makes the person generate R + or readymade OH with water or the 。 (4)O2s ultraviolet brightness , this maximum field have restricted application range especially its sewage purification application. How to make TiO2 get the sensitization effect reacting to light to visible light bee people39。++TiO2(eCB) (10) TiO2(eCB)+O2→O2 The benzene , the chlorobenzene resemble (Shan chlorobenzenes, two adjacent chlorobenzenes)。Organic alcohol (methanol, alcohol)。 Sucrose, etc. Nitro group benzene and carbon tetrachloride degradation among them are slow slower, other matter can prompt degradation. Waste water treatment of dye Dye wastewater color high, hard biodegradable, contains most of the benzene ring, amino, azo groups, such as carcinogenic substances, emissions into the environment can cause serious pollution. With nanoTiO2 photocatalytic degradation of technical processing of wool dyeing factory waste water, can plete mineralization of organic matter, not the existence of secondary pollution, with savings to invest, high efficiency, energy conservation and so on. NanoTiO2 as a photocatalyst in the presence of dissolved oxygen conditions, prone to watersoluble dyes photocatalytic degradation reaction. TiO2 photocatalytic degradation with alkaline red dyeing wastewater can significantly reduce the chemical oxygen demand of wastewater COD and ecotoxicity, treated water to achieve the degree of colorless, transparent [9]. Wastewater treatment of pesticide Organic sulfur, organic phosphorus and other highly toxic pesticides are widely used in agricultural production, these pesticide residues in hard to degradation under natural conditions, resulting in pollution of water bodies have accumulated. TiO2 can be an effective degradation of these highly toxic pesticides, in the suspension of nanoTiO2 by UV irradiation, the degradation of organ pho