Study on the Preparation of WO3/TiO2 Composite Photocatalyst and its Photocatalytic Activity

2014 ◽  
Vol 540 ◽  
pp. 60-63
Author(s):  
Tian E Su ◽  
Chao Lin Miao
Keyword(s):  
Acetic Acid ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Gel Point ◽  
Doping Amount ◽  
Experimental Conditions ◽  
Composite Photocatalyst ◽  
Infrared Spectrometer ◽  
Ft Ir

WO3/TiO2 composite photocatalyst was prepared from tetrabutyl titanate, ammonium tungstate by sol-gel method. The influence of acetic acid and ethanol on the gel point time, and the influence of doping amount of W on the photocatalytic activity was studied. The properties of powders were characterized by Fourier transform infrared spectrometer(FT-IR), and the photocatalytic activity was characterized by probe reaction of methyl orange degradation. The results show that the homogeneous transparent precursor is prepared at the amount of acetic acid =1mL and the amount of ethanol =10mL.When the doping amount of W reached to 0.12%, the best photocatalysis efficiency was obtained. Under the experimental conditions, the infrared absorption band of the W－O was not observed.

Preparation and Photocatalytic Performances of F-Doped TiO2

2014 ◽  
Vol 936 ◽  
pp. 814-818 ◽  
Author(s):  
Xian Zhen Diao ◽  
Xi Li Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Sol Gel ◽  
Pure Tio2 ◽  
Doping Amount ◽  
Tio2 Photocatalysts ◽  
Infrared Spectrometer ◽  
Blue Solution ◽  
Lamp Illumination

Butyl acetate titanate as precursors, no water ethanol as solvent, pure TiO2 and different doping ratio of F/TiO2 photocatalysts were prepared through sol-gel method; And F doping amount on photocatalytic activity of TiO2 influences were analysed systematically through uv-vis spectrophotometer, infrared spectrometer, etc. Experimental results show that photocatalytic activity of TiO2 is better when the mole ratio of F is between 10% and 20%; When F doping amount is 20%, catalyst amount is 25g, the photocatalytic degradation rate of F/TiO2 can reach 85.74% in10%wt methylene blue solution under 250W high-voltage mercury lamp illumination after 2 hours and the area of illumination 6.94×10-3m2. In the same way, the photocatalytic degradation rate of pure TiO2 is just 35.39 %. It proves that F/TiO2 catalyst of doping amount 20% presents the best photocatalytic activity.

Preparation and Photocatalytic Activity of Fe-Ce-N Tri-Doped TiO2 Catalysts

2013 ◽  
Vol 750-752 ◽  
pp. 1276-1282
Author(s):  
Yao Yao Wang ◽  
Hong Xie ◽  
Wei Zhang ◽  
Yu Bin Tang ◽  
Fang Yan Chen
Keyword(s):  
Photocatalytic Activity ◽  
Diffuse Reflectance Spectroscopy ◽  
Uv Light ◽  
Anatase Phase ◽  
Sol Gel ◽  
Synergetic Effect ◽  
Tetrabutyl Titanate ◽  
Visible Range ◽  
Doping Amount ◽  
Optimal Doping

Fe-Ce-N tri-doped TiO2 photocatalyst was prepared by sol-gel method using tetrabutyl titanate as precursor. The optimal doping amount and calcinations temperature were determined. The prepared catalyst was characterized by X-ray diffraction (XRD) and UV-Vis diffuse reflectance spectroscopy, and the photocatalytic activity was evaluated by means of the degradation for methyl orange (MO) under UV light and daylight irradiation. The results indicated that the optimal doping amount was 1.0% N, 0.25% Fe and 0.05% Ce, and the appropriate calcination temperature was 400°C. XRD analysis showed that TiO2 existed in anatase phase completely. UV-Vis adsorption spectrum showed that Fe-Ce-N tri-doping resulted in a intense adsorption in the near UV and visible-light region and a red shift in the adsorption edge from UV range to visible range of 400-500nm. The photocatalytic activity of Fe-Ce-N tri-doped TiO2 under UV and daylight irradiation was very higher than that of bi-doped Fe-Ce-TiO2, Fe-N-TiO2, Ce-N-TiO2 and undoped TiO2. The significantly higher activity of Fe-Ce-N tri-doped TiO2 may be due to the synergetic effect of Fe, Ce and N in the tri-coped TiO2.

Preparation and Photocatalytic Properties of Nano Ni/TiO2 Composite in Alginate

2012 ◽  
Vol 531-532 ◽  
pp. 539-542
Author(s):  
Hai Feng Chen ◽  
Ting Yan
Keyword(s):  
Photocatalytic Performance ◽  
Sol Gel ◽  
Catalytic Efficiency ◽  
Inorganic Materials ◽  
Molar Ratio ◽  
Tetrabutyl Titanate ◽  
Doping Amount ◽  
Illumination Time ◽  
Ft Ir ◽  
Nano Nickel

New nano nickel-doped titanium dioxide composites had been produced by a conducting sol-gel method. The alginate gel was used as a template to prevent the conglomeration of the inorganic materials. In this experiment, nickel nitrate, tetrabutyl titanate and sodium alginate were used as main materials to prepare different amount nickel-doped TiO2 particles. The amount of Ni was studied from 0 to 9 mol.-% (where mol.-% refers to the Ni/TiO2 molar ratio), and the Ni/TiO2 composites were characterized by XRD, FT-IR, TG-DTA, and we carried out doping amount, catalyst amount and illumination time influence on photocatalytic performance of nano Ni/TiO2 composite in aqueous methyl orange. The activity of TiO2 gradually increased with the increasing of doping amount, and there was highest catalytic efficiency when Ni = 9 % mol.

Preparation and Photocatalytic Property of TiO2/NiFe2O4 Composite Photocatalysts

2012 ◽  
Vol 518-523 ◽  
pp. 775-779 ◽  
Author(s):  
Dong Dong Tan ◽  
De Fu Bi ◽  
Peng Hui Shi ◽  
Shi Hong Xu
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Methyl Orange Solution ◽  
X Ray Diffraction ◽  
Doping Amount ◽  
X Ray ◽  
Uv Illumination ◽  
Composite Photocatalysts ◽  
Orange Solution

The TiO2/NiFe2O4 (TN) composite nanoparticles with different mass ratios of NiFe2O4 to TiO2 were prepared via sol-gel method. X-ray diffraction was used to characterize the phase structure of TN. The results indicated that adulterating a smidgen of NiFe2O4 into the TiO2 (about 0.1%) can promote the phase transformation of TiO2, however, when the doping amount of NiFe2O4 surpasses 1%, the introduction of NiFe2O4 can inhibit the growth of TiO2 crystal grain and reduce the size of TiO2 crystal grain. The degradation experiment of methyl orange solution under UV illumination (253.7 nm) showed that the content of NiFe2O4 in the TN was higher, the photocatalytic activity of TN was worse, and the 0.1% TiO2/NiFe2O4 calcined at 400 °C presented the best photocatalytic activity.

Preparation and Photocatalytic Properties of Rod-Shaped TiO2 Based on Salix Fiber

2014 ◽  
Vol 609-610 ◽  
pp. 250-254
Author(s):  
Ya Bin Li ◽  
Jin Tian Huang ◽  
Yan Fei Pan
Keyword(s):  
Photocatalytic Performance ◽  
Sol Gel ◽  
Average Diameter ◽  
X Ray Diffraction ◽  
Nanocomposite Structure ◽  
X Ray ◽  
Infrared Spectrometer ◽  
Ft Ir ◽  
Degradation Of Methyl Orange ◽  
Scanning Electron

In the paper, the TiO2nanomaterials adopted the microcrystalline cellulose as the template by the template method and sol-gel method was prepared. Through the infrared spectrometer (FT-IR), scanning electron microscope (SEM), X-ray diffraction (XRD), the surface morphology, composition and the type of the samples were characterized respectively. The influence of the macro morphology of TiO2photocatalytic performance to use the reaction of decolorization and degradation of methyl orange as model was analyzed. The results showed that TiO2which was produced by the template of sallix fiber was Rod-shaped and the average diameter size of nanocomposite structure was 20.592 nm, which can provide a new method of producing other morphology of TiO2.

Nonmetal–metal–semiconductor-promoted P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with superior photocatalytic activity and stability

2015 ◽  
Vol 3 (34) ◽  
pp. 17858-17865 ◽  
Author(s):  
Xiaohong Hu ◽  
Qi Zhu ◽  
Xinlong Wang ◽  
Naoki Kawazoe ◽  
Yingnan Yang
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Light Irradiation ◽  
Solar Light ◽  
Tio2 Photocatalyst ◽  
Photocatalytic Ability ◽  
Composite Photocatalyst ◽  
Gel Method ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

P/Ag/Ag2O/Ag3PO4/TiO2 composite photocatalyst has been successfully prepared by a sol–gel method. It shows highly enhanced photocatalytic ability and stability under simulated solar light irradiation.

Preparation of CNTs/TiO2/CS Film and its Photocatalytic Activity

2011 ◽  
Vol 287-290 ◽  
pp. 1607-1611
Author(s):  
Li Ping Zeng ◽  
Quan Zhang ◽  
Guo Qiang Zhang ◽  
Li Hui Zou
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Synergetic Effect ◽  
Structure And Property ◽  
Catalyst Film ◽  
Photocatalytic Activities ◽  
Ft Ir ◽  
Gaseous Formaldehyde ◽  
Carbon Nano Tube

In this work, carbon nano-tube/TiO2(CNTs/TiO2) nanocomposites were prepared using a conventional sol-gel method. To further obtain a uniform catalyst film, chitosan (CS) was used as a crosslinker for the CNTs/TiO2composite. The structure and property of CNTs/TiO2/CS film were characterized using XRD, FT-IR, TEM, SEM, and UV-vis. The photocatalytic activities of CNTs/TiO2/CS film were measured through the photocatalytic degradation of gaseous formaldehyde. Compared with the commercial TiO2, higher degradation was achieved with the CNTs/TiO2/CS film due to stronger absorbability and synergetic effect among CNTs, TiO2, and CS.

scholarly journals A CeO2 Semiconductor as a Photocatalytic and Photoelectrocatalytic Material for the Remediation of Pollutants in Industrial Wastewater: A Review

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1435
Author(s):  
Elzbieta Kusmierek
Keyword(s):  
Photocatalytic Activity ◽  
Industrial Wastewater ◽  
Green Technology ◽  
Experimental Conditions ◽  
Oxide Semiconductors ◽  
Composite Photocatalyst ◽  
Conduction Bands ◽  
Photoelectrocatalytic Degradation ◽  
Valence Bands ◽  
Photocatalytic Reactions

The direct discharge of industrial wastewater into the environment results in serious contamination. Photocatalytic treatment with the application of sunlight and its enhancement by coupling with electrocatalytic degradation offers an inexpensive and green technology enabling the total removal of refractory pollutants such as surfactants, pharmaceuticals, pesticides, textile dyes, and heavy metals, from industrial wastewater. Among metal oxide—semiconductors, cerium dioxide (CeO2) is one of the photocatalysts most commonly applied in pollutant degradation. CeO2 exhibits promising photocatalytic activity. Nonetheless, the position of conduction bands (CB) and valence bands (VB) in CeO2 limits its application as an efficient photocatalyst utilizing solar energy. Its photocatalytic activity in wastewater treatment can be improved by various modification techniques, including changes in morphology, doping with metal cation dopants and non-metal dopants, coupling with other semiconductors, and combining it with carbon supporting materials. This paper presents a general overview of CeO2 application as a single or composite photocatalyst in the treatment of various pollutants. The photocatalytic characteristics of CeO2 and its composites are described. The main photocatalytic reactions with the participation of CeO2 under UV and VIS irradiation are presented. This review summarizes the existing knowledge, with a particular focus on the main experimental conditions employed in the photocatalytic and photoelectrocatalytic degradation of various pollutants with the application of CeO2 as a single and composite photocatalyst.

Hydrophilic and Photocatalytic Performances of Y-Doped Titanium Dioxide Thin Films

2013 ◽  
Vol 651 ◽  
pp. 103-108
Author(s):  
Jun Du ◽  
Yan Bin Yu ◽  
Jing Jing Huang ◽  
Hua Qiang Fu ◽  
Bu Hui Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Contact Angle ◽  
Photocatalytic Activity ◽  
Calcination Temperature ◽  
Crystalline Phase ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Continuous Increase ◽  
Photocatalytic Performances

Pure and Y-doped TiO2 thin films are prepared on glass by sol-gel method. Tetrabutyl titanate was used as Ti precursors. The chemical composition, structure and properties of TiO2 thin films are characterized by XRD, FT-IR, UV-Vis and Optical Contact Angle Measuring Instrument. Their photocatalytic performances were studied in detail by the methylene blue degradation model. The results show that the crystalline phase of Y2Ti2O7 is formed and the phase transformation from anatase to rutile is restrained when Y is doped in the TiO2 thin films. However, with the continuous increase in calcination temperature, its photocatalytic activity decreases, because the anatase will transform to the rutile. The proper amount of Y doping will cause the lattice to expand, the new defects will form and the smaller band-gap energy will be revealed. Thus, the absorption ability toward the ultraviolet can be improved, the redshift of the absorption band can also be found. As the results of it, the hydrophilicity and photocatalytic efficiency can improved. Furthermore, the photocatalytic activity increases with the hydrophilicity. When the calcination temperature of thin films is 450oC and the Y-doping is 0.3%, the main crystalline phase of the samples is the anatase, the contact angle is only 13.7o and the degradation ratio of methylene blue reached 98.84%.

Characterization and Photocatalytic Activity of FeVO4 Photocatalysts Synthesized via a Surfactant-Assisted Sol-Gel Method

2011 ◽  
Vol 197-198 ◽  
pp. 926-930
Author(s):  
Min Wang ◽  
Qiong Liu ◽  
Chen Zhi Jiang
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photodegradation Rate ◽  
Photocatalytic Activities ◽  
Xrd Patterns ◽  
Surfactant Assisted

FeVO4photocatalysts were synthesized via a surfactant-assisted sol-gel method and characterized with X-ray diffraction (XRD), scanning electron microsoope （SEM）and specific surface area (BET). The photocatalytic activity was evaluated by photocatalytic degradation of methyl orange (MO) solution under visible light. The XRD patterns of no-surfactant-assisted, PEG-assisted, CTAB-assisted and SDS-assisted FeVO4, indicate that diffraction peaks can be well indexed as triclinc FeVO4. And the crystalline sizes of samples were evaluated as 113, 69, 66, 76 nm for FVO, FVO-PEG, FVO-CATB and FVO-SDS respectively.The addition of surfactant woul greatly affect the morphology of FeVO4photocatalysts, which can lead to different photocatalytic activities between them. In the experimental conditions used, the PEG-assisted FeVO4product had a much higher photocatalytic activity (the photodegradation rate was about 77% or so in 14h) than the other three products.

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