Visible-Light-Driven TiO2 Catalysts Doped with Two Different Nonmetal Species by Hydrothermal Method

2011 ◽  
Vol 183-185 ◽  
pp. 591-594 ◽  
Author(s):  
Guang Sheng Chen ◽  
Si Yao Guo ◽  
Feng Zhang ◽  
Song Han
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Photoelectron Spectroscopy ◽  
Organophosphorus Pesticide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anatase Titania ◽  
Visible Light Driven ◽  
Doped Titania ◽  
Test Result

The doping TiO2 were prepared by hydrothermal method with two different nonmetal, that is N-doped, and N, S codoped. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS). According to the test result, nitrogen and sulfur co-doped titania give a higher photocatalytic activity in the degradation of organophosphorus pesticide. It was evidenced that the incorporation N in the anatase titania lattice in the form of O–Ti–N linkages. However, we compared with N-doped and N, S codoped it was no reservation to conclude that N, S codoped titania exhibit the further enhanced photocatalytic activity.

Marked Enhancement of Photocatalytic Activity of P-Doped TiO2 with Hydrothermal Method

2010 ◽  
Vol 113-116 ◽  
pp. 2150-2153 ◽  
Author(s):  
Si Yao Guo ◽  
Feng Lu Wang ◽  
Jin Bing Sun ◽  
Lin Yang ◽  
Feng Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Photoelectron Spectroscopy ◽  
Physical Adsorption ◽  
Anatase Phase ◽  
Titania Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
One Step ◽  
Doped Titania

Phosphor-doped titania nanoparticles were synthesized by a one step hydrothermal method. These samples which prepared by hydrothermal method exist in anatase phase has much higher photocatalytic activity for methylene blue (MB) degradation. In addition, MB degradation performance of the hydrothermal ones is also superior to that of the commercial P25. The resulting materials were characterized by X-ray diffraction (XRD), nitrogen physical adsorption at 77 K, X-ray photoelectron spectroscopy (XPS), etc. It can conclude the hydrothermal method proves to be more suitable to improve the photocatalytic performance.

Phosphorus Doped Titania Materials: Synthesis, Characterization and Visible-Light Photocatalytic Activity

2011 ◽  
Vol 183-185 ◽  
pp. 2059-2062 ◽  
Author(s):  
Song Han ◽  
Jin Bing Sun ◽  
Si Yao Guo ◽  
Li Jiang ◽  
Dong Po He
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Photoelectron Spectroscopy ◽  
Physical Adsorption ◽  
Titania Nanoparticles ◽  
X Ray Diffraction ◽  
Materials Synthesis ◽  
X Ray ◽  
Titania Photocatalyst ◽  
Doped Titania

Hierarchical mesoporous Phosphor-doped titania nanoparticles were synthesized by two different method, that is roasting method and hydrothermal method. The samples prepared by hydrothermal method has much higher photocatalytic activity. In addition, MB degradation performance of the hydrothermal ones is also superior to that of the commercial P25. Therefore, the methylene blue (MB) degradation performance on the phosphorous-doped photocatalyst is much enhanced and superior to that of the commercial P25. The hydrothermal method proves to be very suitable for the synthesis of P-doped titania photocatalyst. The resulting materials were characterized by X-ray diffraction (XRD), nitrogen physical adsorption at 77 K, X-ray photoelectron spectroscopy (XPS), and solar light spectroscopy.

Hydrothermal Treatment and its Influence on the Structure of Nitrogen Doped Titania

2011 ◽  
Vol 393-395 ◽  
pp. 1255-1258
Author(s):  
Zhan Shu ◽  
Tao Zeng ◽  
Hou Juan Liu
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Hydrothermal Treatment ◽  
Photoelectron Spectroscopy ◽  
Lattice Structure ◽  
Xenon Lamp ◽  
X Ray Diffraction ◽  
X Ray ◽  
One Step ◽  
Doped Titania

N-doped titania was synthesized by a one step hydrothermal method, which is characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The samples prepared by hydrothermal method demonstrate higher photocatalytic activity toward the degradation of methylene blue under xenon lamp which has similar spectra to solar light, and also is much superior to that of the commercial P25. In addition, the samples prepared by hydrothermal treatment could severely influence the crystal lattice structure. Morever, N-doped titania can further enhacnce the photocatalytic activity effectively, and hydrothermal treatment is a very suitable method for the synthesis of N-doped titania. This excellent performance could endow the as-prepared P-doped titania potential in purifying wastewater.

Preparation, Characterization of N, P Codoped TiO2 Nanoparticles with their Excellent Photocatalystic Properties

2010 ◽  
Vol 113-116 ◽  
pp. 2162-2165
Author(s):  
Si Yao Guo ◽  
Bo Chi ◽  
Jin Bing Sun ◽  
Feng Lu Wang ◽  
Lin Yang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Phosphorous Acid ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solar Light Irradiation ◽  
Anatase Titania ◽  
Doped Titania ◽  
Co Doped

Phosphor and nitrogen co-doped titania were prepared by hydrothermal method with phosphorous acid and ammonia as the P and N sources, respectively. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS). Phosphor and nitrogen co-doped titania give a higher photocatalytic activity in the degradation of methylene blue (MB) under solar light irradiation. It was evidenced that the incorporation of P and N in the anatase titania lattice in the form of O–Ti–N, O–P–N, and Ti–O–P linkages. After photocatalytic properties studies, we can conclude that N, P codoped titania exhibit the further enhanced photocatalytic activity.

Hydrothermal Treatment and its Influence on the Structure of Phosphorous Doped Titania

2011 ◽  
Vol 287-290 ◽  
pp. 1775-1778
Author(s):  
Si Yao Guo ◽  
Feng Fei Wang ◽  
Li Jiang ◽  
Dong Po He
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Hydrothermal Treatment ◽  
Photoelectron Spectroscopy ◽  
Lattice Structure ◽  
Sol Gel ◽  
Xenon Lamp ◽  
X Ray ◽  
One Step ◽  
Doped Titania

P-doped titania was synthesized by a one step hydrothermal method and sol-gel method, which is characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The samples prepared by hydrothermal method demonstrate higher photocatalytic activity toward the degradation of methylene blue under xenon lamp which has similar spectra to solar light, and also is much superior to that of the commercial P25. The as prepared P-doped titania shows a small particle size (the minimum reaches to 4.5 nm). In addition, the samples prepared by hydrothermal treatment could severely influence the crystal lattice structure. Morever, P-doped titania can further enhacnce the photocatalytic activity effectively, and hydrothermal treatment is a very suitable method for the synthesis of P-doped titania. This excellent performance could endow the as-prepared P-doped titania potential in purifying wastewater.

Preparation of Nitrogen-Doped Titanium Dioxide with Visible-Light Photocatalytic Activity of Organophosphorus Pesticide Degradation

2011 ◽  
Vol 183-185 ◽  
pp. 1795-1798
Author(s):  
Si Yao Guo ◽  
Song Han ◽  
Dong Po He ◽  
Li Jiang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Organophosphorus Pesticide ◽  
Photocatalytic Properties ◽  
X Ray Diffraction ◽  
Pesticide Degradation ◽  
X Ray ◽  
Nitrogen Doped ◽  
Doped Titania ◽  
Visible Light Photocatalytic ◽  
Nitrogen Doped Titanium Dioxide

Adjusting the nitrogen content of N doped titania which were prepared by hydrothermal method to discuss the influences of the photocatalytic properties and the modifications. It was also established that N doped TiO2 powders enhances the Vis-light absorption. Finally the photocatalytic properties of catalysts were tested in the degradation of organophosphorus pesticide. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), etc.

Discussion the Mechanism of Sulfur and Phosphorus Doped TiO2

2011 ◽  
Vol 393-395 ◽  
pp. 1157-1160
Author(s):  
Tao Zeng ◽  
Hou Juan Liu ◽  
Zhan Shu
Keyword(s):  
Photocatalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Xenon Lamp ◽  
X Ray Diffraction ◽  
One Pot ◽  
Preparation Methods ◽  
X Ray ◽  
Doping Mechanism ◽  
Doped Titania ◽  
Phosphorus Doped

Environmental pollution has become one of the most serious problems with the development of the world. TiO2 has caused great concern due to its excellent effort on the environmental purification and solar energy conversion. N, S-doped titania were prepared by a one-pot hydrothermalmethod using urea and sulfourea as precursor of nitrogen and sulfur. The samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of them was evaluated for the degradation of methylene blue under xenon lamp which has similar spectra to solar light. The preparation methods and doping mechanism of the nitrogen-doped TiO2 are discussed. Morever, N, S-codoped titania can further enhacnce the photocatalytic activity effectively, This excellent performance could endow the as-prepared P-doped titania potential in purifying wastewater.

Photocatalytic Degradation of Indigo Carmine by ZnO-Cu2O/Graphene Oxide Composites Synthesized via Hydrothermal Method

2013 ◽  
Vol 668 ◽  
pp. 105-109 ◽  
Author(s):  
Huai Di Wu ◽  
Lu Sheng Chen ◽  
Jin Chao Hu
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Hydrothermal Method ◽  
Photoelectron Spectroscopy ◽  
Indigo Carmine ◽  
Synthesis Temperature ◽  
X Ray Diffraction ◽  
Synthesis Time ◽  
X Ray ◽  
Oxide Composites

In this work, ZnO–Cu2O/graphene oxide (GO) composites have been synthesized by using simple hydrothermal method. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize the crystal structure and composite elements. The photocatalytic activity of the composites has been conducted by measuring the degradation of indigo carmine under UV irradiation. When the atom ratio of Zn/Cu is 5/2, 120 °C of hydrothermal synthesis temperature and 20 h of synthesis time, the ZnO/Cu2O/GO composite exhibits good photocatalytic activity with 96.5% degradation rate of indigo carmine aqueous solution under 500 W high pressure Hg lamp irradiation for 240 min.

Preparation of Visible-Light-Responsive TiO2-xNx Photocatalyst by a Very Simple Method

2011 ◽  
Vol 383-390 ◽  
pp. 3188-3191
Author(s):  
Han Jie Huang ◽  
Wen Long She ◽  
Ling Wen Yang ◽  
Hai Peng Huang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflection ◽  
Ammonia Solution ◽  
Reflection Spectra ◽  
X Ray Diffraction ◽  
Simple Method ◽  
X Ray ◽  
Light Excitation

A visible-light-responsive TiO2-xNx photocatalyst was prepared by a very simple method. Ammonia solution was used as nitrogen resource in this paper. The TiO2-xNx photocatalyst was characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), UV-Vis diffuse reflection spectra (DRS), and X-ray photoelectron spectroscopy (XPS). The ethylene was selected as a target pollutant under visible light excitation to evaluate the activity of this photocatalyst. The new prepared TiO2-xNx photocatalyst with strong photocatalytic activity under visible light irradiation was demonstrated in the experiment.

scholarly journals Hydrothermal Synthesis of Iodine-Doped Nanoplates with Enhanced Visible and Ultraviolet-Induced Photocatalytic Activities

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Jiang Zhang ◽  
Zheng-Hong Huang ◽  
Yong Xu ◽  
Feiyu Kang
Keyword(s):  
Photocatalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Oxygen Vacancies ◽  
Diffuse Reflectance Spectroscopy ◽  
Synergetic Effect ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Photocatalytic Activities

The iodine-doped Bi2WO6(I-BWO) photocatalyst was prepared via a hydrothermal method using potassium iodide as the source of iodine. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The photocatalytic activity of I-BWO for the degradation of rhodamine B (RhB) was higher than that of pure BWO and I2-BWO regardless of visible light (>420 nm) or ultraviolet light (<400 nm) irradiation. The results of DRS analysis showed that the I-BWO and I2-BWO catalysts had narrower band gaps. XPS analysis proved that the multivalent iodine species including I0and were coadsorbed on the defect surface of Bi2WO6in I-BWO. The enhanced PL intensity revealed that a large number of defects of oxygen vacancies were formed by the doping of iodine. The enhanced photocatalytic activity of I-BWO for degradation of RhB was caused by the synergetic effect of a small crystalline size, a narrow band gap, and plenty of oxygen vacancies.

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