【正文】 ............................................................................. 39 結(jié)果與討論 .................................................................................................................... 41 光催化活性的測定 ……………………………………………………………………………… ..45 本章小結(jié) ........................................................................................................................ 47 東北石油大學(xué) 工程碩士專業(yè) 學(xué)位 論文 第五章 羅丹明 B 敏化 TiO2光催化劑的制備及其性能研究 .............................................. 48 試劑 .............................................................................................................................. 48 羅丹明 BTiO2的制備 ..................................................................................................... 48 XRD 分析 ...................................................................................................................... 49 紅外光譜分析 ................................................................................................................. 49 激光粒度分析 ................................................................................................................ 50 SEM 分析 ....................................................................................................................... 52 TGDTA 分析 ................................................................................................................ 52 羅丹明 BTiO2的光催化劑活性 ....................................................................................... 53 不同影響因素對(duì)光催化活性的影響 ................................................................................. 55 本章小結(jié) ...................................................................................................................... 58 第六章 結(jié)論 ............................................................................................................................ 59 發(fā)表文章目錄 .......................................................................................................................... 60 參考文獻(xiàn) .................................................................................................................................. 61 致 謝 ...................................................................................................................................... 65 東北石油大學(xué)碩士學(xué)位論文 1 第一章 緒 論 概述 進(jìn)入 21 世紀(jì)以來，人們?cè)絹碓揭庾R(shí)到環(huán)境污染的控制與治理是人類社會(huì)面臨和 亟待解決的重大課題，在眾多環(huán)境污染治理技術(shù)中，以半導(dǎo)體氧化物為催化劑的多相光催化過程以其在室溫條件下反應(yīng)及可直接利用太陽光作為光源來活化催化劑，驅(qū)動(dòng)氧化－還原反應(yīng)等獨(dú)特性能而成為一種立項(xiàng)的環(huán)境污染治理技術(shù)。 2． 通過正交實(shí)驗(yàn)，確定了 TiO2S 光催化 劑 處理回注水 時(shí)， 影響 COD 去除率的主要因素 。 coreshell structure。 have a good performance in degradation PAM with sun light irradiation. The treated PAM solution was investigated by IR, we found that the PAM molecule was cracked into small fragments, the COD of the treated solution is 341mg/L. The orthogonal test methods was employed to determine the effects of the four factors including temperature, dosing quantity of photocatalyst, pH degree and oxidation time, results shows that when the dose of TiO2xSx is , temperature is 40℃ , pH=3, oxidation time is 90min, the COD removal rate approached the highest %, the residual COD is Ul trasonic and Fenton reagent was used to assist photocatalyst for PAM degradation. Results reviews that Ultrasonic does little to improve the photocatalytic performance of TiO2xSx, however, Fenton reagent does greatly as the PAM degradation rate reached to % and COD removal rate was %. The orthogonal test methods was employed to determine the effects of the four factors including consistency of H2O2, consistency of Fe2+, dosing quantity of photocatalyst and oxidation time, results shows that when consistency of H2O2 and Fe2+ is and 30mg respectively, dose of TiO2xSx is , oxidation time is 30min, the residual COD is 東北石油大學(xué) 工程碩士專業(yè) 學(xué)位 論文 VII A new phosphorus and Nitrogen codoped magic coreshell photocatalyst (Fe3O4/SiO2/TiO2(P、 N) was prepared by three steps. The prepared posite particles were characterized by scanning electron microscopy(SEM), transmission electron microscopy (TEM), Xray diffraction(XRD)and atomic force microscopy (AFM). The photocatalytic activity of the synthesized posite particles has been tested by photodegration of PAM under UV illumination(λ254nm). The results shows that the Fe3O4/SiO2/TiO2(P、 N) posite particles were twocoated structures, SiO2 was the immediate layer, the outset layer was anatase TiO2 . In which Fe3O4 core used for separation by the magic field, SiO2 layer for prevent the photodissolution of the Fe3O4 phase an TiO2 phase, TiO2 shell for photocatalysis. The photocatalyst with the same amount of P an N has higher photocatalytic acticities, which can degrade % of PAM within 90min. At the same time, 500℃ keep 2h was found to be the best heattreatment operation. At this temperature, the amorphous TiO2. transformed into anatase TiO2 pletely and a little amount of brookite accured. The rhodamine B dyesensitized TiO2 was prepared by low heating solid state method, then heat treated at 6080℃ .The sample was characterized by XRD， IR, laser particle size analyzer， SEM， TGDTA and the photocatalytic activity was investigated by PAM degradation. Results shows that: there is a strong interaction between rhodamine B and TiO2, the TiO2 was posed of rutile and anatase crystal phase. The particle size distribution of sensitized TiO2 became wider, which was testified by laser particle size analysis and XRD. The PAM degradation rate reached % by rhodamine B dyesensitized TiO2 under UV irradiation , 38 percent higher than pure TiO2. Recycling experiment exhibit that the activity of photocatalyst decreased as the increasing of recycling times, after used for six times, the PAM degradation rate declined form % to 68%. Keywords: TiO2。催化劑回收實(shí)驗(yàn)表明，催化劑的活性隨著使用次數(shù)的增加而降低，使用六次后的催化活性由 %下降到了 68%。結(jié)果表明，經(jīng)低溫固相反應(yīng)法制備的催化劑中羅丹明與 TiO2 發(fā)生了相互作用 ， TiO2 的晶型為銳鈦礦與金紅石相的混晶結(jié)構(gòu)，經(jīng)敏化后