Correlation of anatase particle size with photocatalytic properties

2010 ◽  
Vol 207 (10) ◽  
pp. 2288-2291 ◽  
Author(s):  
Sangwook Lee ◽  
In-Sun Cho ◽  
Jun-Hong Noh ◽  
Kug Sun Hong ◽  
Gill Sang Han ◽  
...  
Keyword(s):  
Particle Size ◽  
Photocatalytic Properties ◽  
Anatase Particle

Microwave-Assisted Preparation of Nitrogen Doped Nano-TiO2 and the Study on the Properties

2014 ◽  
Vol 924 ◽  
pp. 123-128
Author(s):  
Da Huan Zhou ◽  
Xu Chen ◽  
Fu Yun Li ◽  
Lan Ying Guo ◽  
Li Zhen Yang
Keyword(s):  
Particle Size ◽  
Calcination Temperature ◽  
Mixed Crystal ◽  
Rutile Phase ◽  
Photocatalytic Properties ◽  
Crystal Phase ◽  
X Ray Diffraction ◽  
Doping Amount ◽  
Nitrogen Doped ◽  
Microwave Assisted

The nitrogen doped nanoTiO2 was prepared by the microwave-assisted method. The properties were characterized by the X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The effects of the calcination temperature and the doping amount of nitrogen on the nitrogen doped nanoTiO2 crystal phase and its photocatalytic properties were studied. The result indicated that with the increase of the calcination temperature, the proportion of rutile in the mixed crystal phases increased gradually. When the calcination temperature was 650°C, the pure rutile phase appeared. When the TiO2 was calcinated at 400 °C, the particle size was the minimum (17nm). This mixed crystal was conducive to the good photocatalytic properties of nanoTiO2. The degradation rate of methyl orange was 50.86%. At the calcination temperature of 450 °C, the proportion of rutile in the mixed crystal phase increased first and then decreased, until finally it increased again with the increase of the doping amount of nitrogen. When the ratio of nitrogen to titanium was 1:0.5, the catalytic effect was the best. The photocatalytic degradation efficiency was 71.63%, and the particle size was also approximately the minimum (15nm).

The Morphology Control of Nano-Cu2O and Study on its Phototocatalytic Properties in the Treatment of Chromium-Containing Wastewater

2012 ◽  
Vol 482-484 ◽  
pp. 2559-2562
Author(s):  
Bin Zhao ◽  
Di Ma
Keyword(s):  
Particle Size ◽  
Reaction Temperature ◽  
Reduction Method ◽  
Morphology Control ◽  
Chemical Precipitation ◽  
Photocatalytic Properties ◽  
Important Relationship ◽  
Naoh Solution ◽  
Crystal Type

The sphere-like nano-Cu2O was prepared by chemical precipitation and reduction method, the different size of sample was obtained by adjusting reaction temperature and concentration of NaOH solution. Cu2O was characterized by XRD and SEM, respectively. The results indicate that the homogeneity of Cu2O particles is related to the reaction temperature while the crystal type to the concentration of NaOH solution. The effects of the different particle size on the photocatalytic properties in the treatment of chromium(Ⅵ)-containing water was performed, the results show that there exists an important relationship between them, that is the excellent properties can be obtained with smaller size of Cu2O.

The Evaluation of Photocatalytic Properties of Iron Doped Titania Photocatalyst by Degradation of Methylene Blue Using Fluorescent Light Source

2013 ◽  
Vol 652-654 ◽  
pp. 1700-1703 ◽  
Author(s):  
Amir Abidov ◽  
Bunyod Allabergenov ◽  
Oybek Tursunkulov ◽  
Jeonghwan Lee ◽  
Sang Youp Kim ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Particle Size ◽  
Metal Ion ◽  
Photocatalytic Properties ◽  
Photocatalytic Decomposition ◽  
Fluorescent Light ◽  
Blue Solution ◽  
Mechanochemical Milling ◽  
Titania Photocatalyst ◽  
Doped Titania

Transition metal ion-doped titanium dioxide (TiO2) powders were prepared by mechanochemical milling. Photocatalytic properties of the prepared semiconductor were evaluated using photodegradation of methylene blue under UV and visible light. Dye bleaching was observed spectrophotometrically. Color removal was reached after 120 min. The effect of varying concentration of organic dye, amount of TiO2 photocatalyst, particle size, pH, and stirring rate was observed on the efficiency of reaction. The maximum photocatalytic decomposition of methylene blue solution was achieved with 25nm particle size TiO2, which was ascribed to the enlarged surface area. All obtained results were discussed.

Particle Size and Structural Control of ZnWO4 Nanocrystals via Sn2+ Doping for Tunable Optical and Visible Photocatalytic Properties

2012 ◽  
Vol 116 (34) ◽  
pp. 18508-18517 ◽  
Author(s):  
Yiguo Su ◽  
Baoling Zhu ◽  
Kai Guan ◽  
Shushu Gao ◽  
Li Lv ◽  
...  
Keyword(s):  
Particle Size ◽  
Structural Control ◽  
Photocatalytic Properties

Study on the Photocatalytic Degradation of Bisphenol a by La3+ Doping TiO2 under Sunshine Irradiation

2012 ◽  
Vol 535-537 ◽  
pp. 2220-2223 ◽  
Author(s):  
Xing Jin ◽  
Jin Lan Lian ◽  
Yu Qiao
Keyword(s):  
Particle Size ◽  
Bisphenol A ◽  
Photocatalytic Degradation ◽  
Ph Value ◽  
Irradiation Time ◽  
Sol Gel ◽  
Solar Irradiation ◽  
Lanthanum Doping ◽  
Initial Concentration ◽  
Anatase Particle

Lanthanum doping TiO2 powders were prepared using sol-gel method, and characterized by XRD. The doping quantity, time of solar irradiation and the added quantity of catalyst were investigated for the influence on the photocatalytic degradation of bisphenol A. The results show the structure of La3+ doped TiO2 powders were anatase, particle size were 16 nm. For the initial concentration of bisphenol A solution were 50 mg/L , when the doping quantity of La were 1.0 wt %, the dosing quantity of TiO2 were3.6 g/L, PH value were acid, irradiation time were 2 h, the photocatalytic activity of TiO2 was the best.

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