Compound WO3/TiO2 Nanorods Photocatalytic Degradation of Dimethyl Phthalate in Visible Light Region

2012 ◽  
Vol 518-523 ◽  
pp. 2996-2999
Author(s):  
Chang Qing Wang ◽  
Su Juan Pan ◽  
Guo Fang Zuo ◽  
Xin You Lei
Keyword(s):  
Aqueous Solution ◽  
Optimum Condition ◽  
Visible Light ◽  
Xenon Lamp ◽  
Visible Light Region ◽  
Dimethyl Phthalate ◽  
Initial Concentration ◽  
Light Region ◽  
Degradation Rates ◽  
Catalyst Dosage

The compound WO3/TiO2 nanostructures were prepared by the template technique and characterized by FE-SEM and UV-vis DRS. And they were used to degrade the dimethyl phthalate (DMP) under visible light irradiation. The effects of the initial concentration of DMP and dissolved oxygen (DO) were investigated. The results show that degradation rates reaches 59% in the optimum condition which is ​​the catalyst dosage ~3cm2, the DO is 19.2 mg/ L, xenon lamp irradiating 300 minutes and the initial concentration of dimethyl phthalate in aqueous solution is 10 mg / L.

CdS Quantum Dots Sensitized TiO2 Nanotubes Photocatalytic Degradation of Dimethyl Phthalate under Sunlight Irradiation

2013 ◽  
Vol 726-731 ◽  
pp. 602-605 ◽  
Author(s):  
Xiao Hua Bai ◽  
Shi Chang Wang ◽  
Chang Qing Wang ◽  
Xin You Lei ◽  
Guo Fang Zuo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Dimethyl Phthalate ◽  
Cds Quantum Dots ◽  
Sunlight Irradiation ◽  
Initial Concentration ◽  
Degradation Rates ◽  
Vis Spectroscopy ◽  
Catalyst Dosage ◽  
Cbd Method

The CdS quantum dots sensitized TiO2 nanotubes were prepared by sequential chemical bath deposition (S-CBD) method and characterized by FE-SEM and UV-vis spectroscopy. And they were used to degrade the dimethyl phthalate (DMP) in aqueous under sunlight irradiation. The results show that these photo-catalysts have the highest performance, while the initial concentration of dimethyl phthalate in aqueous solution is 10 mg / L, the degradation rates reaches above 80% in the optimum condition which is the CdS deposited 20 cycles, catalyst dosage ~3cm2, and the sunlight irradiating 180 minutes.

Enhanced Photocatalytic Degradation of Fulvic Acid Using N–Doped SnO2/TiO2 Thin Film Coated Glass Fibers under UV and Solar Light Irradiation for Drinking Water Purification

2016 ◽  
Vol 835 ◽  
pp. 359-365 ◽  
Author(s):  
Peerawas Kongsong ◽  
Lek Sikong ◽  
Sutham Niyomwas ◽  
Vishnu Rachpech
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Visible Light ◽  
Nitrogen Doping ◽  
Glass Fibers ◽  
Band Gap Energy ◽  
Visible Light Region ◽  
Gap Energy ◽  
Light Region ◽  
Degradation Rates

The degradation of fulvic acid (FA) using N–doped SnO2/TiO2 composite thin films coated on glass fibers prepared by sol–gel and dip–coating methods was investigated. The effects of nitrogen doping on coating morphology, physical properties, and FA degradation rates were experimentally determined. Nitrogen doping has an effect on shifting the optical absorption wavelength to visible light region, narrowing the band gap energy and reducing crystallite size which lead to the enhancement of photocatalytic performance. The optimal FA degradation rates of 40N/SnO2/TiO2 composite thin films under UV and solar irradiation are about 2.4 and 2.0 folds higher than that of TiO2 film, respectively due to its narrowest band gap energy (optical absorption wavelength shifting to visible light region) and small crystallite size influenced by nitrogen doped.

Near-infrared (NIR) emitting Nd/Yb(iii) complexes sensitized by MLCT states of Ru(ii)/Ir(iii) metalloligands in the visible light region

2015 ◽  
Vol 44 (34) ◽  
pp. 15212-15219 ◽  
Author(s):  
Lu-Yin Zhang ◽  
Ya-Jun Hou ◽  
Mei Pan ◽  
Ling Chen ◽  
Yi-Xuan Zhu ◽  
...  
Keyword(s):  
Visible Light ◽  
Near Infrared ◽  
Visible Light Region ◽  
Light Region ◽  
Nir Emission

Visible light sensitized NIR emission of Nd3+ and Yb3+ by Ru(ii)/Ir(iii) metalloligands is reported.

scholarly journals Research on modified silicone compound photocatalyst by doping N

2018 ◽  
Vol 238 ◽  
pp. 03005
Author(s):  
DaWei Pan ◽  
GuangXu Shao ◽  
QingWen Zhang
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Nitrogen Content ◽  
Light Response ◽  
Visible Light Region ◽  
Reaction Efficiency ◽  
Nitrogen Doped ◽  
Photo Catalytic Activity ◽  
Composite Catalysts ◽  
Light Region

In order to improve the visible light response and reaction efficiency of nitrogen-doped TiO2 set urea as nitrogen source, and silica gel as the load reagent adopt sol-gel method to prepare powder of nitrogen-doped TiO2 supported on SiO2 , use equal volume impregnation method to load MnO2 on catalyst, and then obtain the composite photocatalyst after drying, and roasting .The prepared composite catalysts were characterized by XPS, TEM, SEM, XRD and other methods. Moreover, the photo-catalytic activity of the composite catalysts under visible-light region was tested, and the influences of nitrogen content and calcinations temperature on the photo-catalytic activity were investigated. The results show that:(1) the range of light response of modified composite catalyst was expanded from ultraviolet region to visible-light region, which results in high visible-light catalytic activity in the degradation of methyl orange.(2) Through the mechanism of photo-catalytic reaction and the treatment effect analysis, MnO2 as catalytic resulting O2 can be served as a good electronic capture agent and improve the reaction efficiency.(3)With the reduction of nitrogen content,and the increase of calcination temperature, the visible-light catalytic activity was weakened.(4) The activity of catalyst was reused six times, without significant reduction and had excellent efficiency and stability.

scholarly journals Structural and optical properties of AgCl-sensitized TiO2 (TiO2 @AgCl) prepared by a reflux technique under alkaline condition

Cerâmica ◽  
2018 ◽  
Vol 64 (370) ◽  
pp. 190-196 ◽  
Author(s):  
V. A. Mu’izayanti ◽  
H. Sutrisno
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Alkaline Condition ◽  
Visible Light Region ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Light Region ◽  
Vis Spectroscopy ◽  
Xrd Patterns ◽  
Tio2 Rutile

Abstract The AgCl-sensitized TiO2 (TiO2@AgCl) has been prepared from the precursor of TiO2-rutile type which on its surface adsorb chloride anion (Cl-) and various amounts of silver using AgNO3 as starting material: AgNO3/(AgNO3+TiO2) mass ratio of 0.00, 1.14, 3.25, 6.38 and 10.32%. Reflux under alkaline condition was the employed technique. All samples were characterized by X-ray diffraction (XRD) and diffuse reflectance UV-vis spectroscopy. The sample without the addition of AgNO3 was analyzed by scanning electron microscope and surface area analyzer. The morphology of the sample showed a distribution of microspheres of approximately 0.5 to 1.0 µm and the specific surface area was 68 m2/g. XRD patterns indicated that the sample without the addition of AgNO3 contained two types of TiO2: rutile (major) and anatase (minor), whereas the samples with the addition of AgNO3 consisted of one phase of AgCl and two types of TiO2: rutile and anatase. The bandgaps of the samples were in the range of 2.97 to 3.24 eV, which were very close to the bandgap of intrinsic TiO2 powder. The presence of 0.8, 2.6 and 4.4 wt% of AgCl in each sample resulted in an additional bandgap in visible light region of 1.90, 1.94 and 2.26 eV, respectively, whereas the presence of 9.4 wt% of AgCl in the sample resulted in two bandgaps in visible light region of 1.98 and 1.88 eV.

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