可見光催化論文：改性納米二氧化鈦的制備及對環(huán)境有機污染物的降解研究

1、 可見光催化論文：改性納米二氧化鈦的制備及對環(huán)境有機污染物的降解研究【中文摘要】納米TiO2作為一種新型光催化劑,利用其光催化降解有機污染物具有無毒、無二次污染、經(jīng)濟等特點,是新一代環(huán)保技術發(fā)展的方向,但由于TiO2帶隙能較寬只能吸收紫外光,極大地限制了其在環(huán)境凈化領域的應用范圍,因此通過改性技術使納米TiO2在可見光區(qū)具有光催化活性已成為光催化研究領域的重要課題。本論文著重研究了納米TiO2的離子摻雜和表面敏化改性技術及改性光催化劑在光催化降解有機污染物中的應用。分別制備了氮摻雜TiO2、經(jīng)氧化【英文摘要】As a new photocatalyst, nano dioxide titani

2、um is non-toxic, no secondary pollution and economical in the aspect of photocatalysis degradation organics, which is the developing direction of new environment protection technology. However, due to the wide band gap of nano dioxide titanium, only can UV-light be absorbed, which highly restrained

3、the applied range of nano dioxide titanium in the field of depollution of environment, so, through modification technology to make nano dioxide titanium absorb visible light has been the important task in the field of photocatalysis. This program mainly studied the ion doping and surface sensitizati

4、on modification technology and the application of modification photocatalysts in organic photocatalysis degradation.N-doped TiO2, N-Fe co-doped TiO2 with a redox treatment and CuPcTs sensitized nanocrystalline TiO2 photocatalyst (CuPcTs/TiO2) were prepared respectively and were characterized by SEM

5、and XRD to analysis their surface topography and crystal form. Di-2-Ethyl Hexyl Phthalate (DEHP) and pentachloraphenol (PCP) were used as simulation pollutants to test the photocatalysis performance of the catalyst samples.The N single-doped titanium dioxide powder was prepared by hydrolysis-precipi

6、tation process with a series of different calcinations temperature. Through the analysis of characterization result and photocatalysis performance, the best calcinations temperature was set as 500 centigrade, the remove rate of DEHP by N-doped titanium dioxide reached to 84.33%. on the basis of conf

7、irming the optimum synthesization technology of N-doped titanium dioxide, we moved forward to synthesis the N-Fe co-doped titanium dioxide with a redox treatment. The co-doped photocatalysis was used to decompose pentachloraphenol, it was found, due to the synergistic effect and the change of ferrum

8、 crystal, the photocatalytic activity of N-Fe co-doped titanium dioxide with a redox treatment was enhanced obviously, the effect of photocatalysis was up to 86.8%.The CuPcTs sensitized TiO2 photocatalyst (CuPcTs/TiO2) was prepared by hydro-thermal synthesis process. Comparing to the unsensitized pu

9、re titanium dioxide, CuPcTs/TiO2 recombination nano photocatalyst had better photocatalytic activity, the remove rate for DEHP was increased obviously under visible light. It was found that the optimal concentration of catalyst was 0.4g/L, optimal pH level 5.0 and optimal irradiation time 50min, und

10、er these conditions, the removal rate of PCP reached up to 93.6%.【關鍵詞】可見光催化 二氧化鈦 改性 DEHP PCP【英文關鍵詞】photocatalysis under visible light TiO2 modification DEHP PCP【目錄】改性納米二氧化鈦的制備及對環(huán)境有機污染物的降解研究摘要5-6Abstract6-7第一章 前言8-271.1 引言81.2 TiO_2光催化的基本原理8-101.3 TiO_2改性研究的方法10-151.4 納米光催化劑應用前景展望15-171.5 光催化測試目標物的選擇17-251.6 課題研究的目標與內(nèi)容25-27第二章 氮摻雜TiO_2的制備及對DEHP的光催化降解27-352.1 引言272.2 實驗部分27-292.3 結果與討論29-342.4 小結34-35第三章 氮-鐵共摻TiO_2的制備及對PCP的光催化降解35-453.1 引言353.2 實驗部分35-373.3 結果與討論37-433.4 小結43-45第四章 酞菁銅敏化