کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
643061 | 884354 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of synthesis conditions on photocatalytic activities of nanoparticulate TiO2 thin films
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of synthesis conditions on photocatalytic activities of nanoparticulate TiO2 thin films Effect of synthesis conditions on photocatalytic activities of nanoparticulate TiO2 thin films](/preview/png/643061.png)
چکیده انگلیسی
In the present study, design of experiments (DOE) was used to find an optimal combination for the factors affecting the preparation, morphology and catalytic activity of nano-crystalline TiO2 thin films synthesized by sol-gel method. Nine TiO2 thin films were prepared onto indium-tin oxide (ITO) substrates by changing four operating parameters at three levels. The four operating parameters are the volume of 20% acetic acid aqueous solution, the volume of co-solvent alcohol, the amount of template reagent (triblock copolymer Pluronic P123), and the calcination temperature. The resulting films were characterized by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and Fourier transform-infrared (FT-IR) spectra. The results of DOE are examined by both the direct observation analysis (also called range analysis) and the analysis of variance (ANOVA) with 90 or 95% confidence intervals. The parameter settings have been optimized as the combination of precursor solution constitution of Ti(OC4H9)4/20%HAC/EtOH/P123 (2 g/15 ml/8 ml/1.1 g), calcination temperature of 450 °C, calcination time of 3 h, and air reaction atmosphere. The thin film prepared under the optimal combination consists of ordered compact anatase nanoparticles with an average grain size of approximately 17.2 nm and an average roughness of 3.653 nm. The 1-h photodegradation efficiency of methyl orange (MO) in aqueous solution and toluene in gaseous phase is 98.9 and 100%, respectively. The factor analysis results of degradation efficiencies show that the calcinations temperature plays an important role in determining the photocatalytic activity of the prepared TiO2 thin film. Furthermore, the surface morphology-dependent photocatalytic activity of the prepared thin films was also found.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 68, Issue 1, 30 June 2009, Pages 83-89
Journal: Separation and Purification Technology - Volume 68, Issue 1, 30 June 2009, Pages 83-89
نویسندگان
Lei Sun, Taicheng An, Shungang Wan, Guiying Li, Ningzhong Bao, Xiaohong Hu, Jiamo Fu, Guoying Sheng,