Influence of the Ratio of ZnO/SnO2 on the Photocatalytic Property of ZnO/SnO2 Nanometer Powder

2012 ◽  
Vol 562-564 ◽  
pp. 435-438
Author(s):  
Xin You Huang ◽  
Chun Hua Gao ◽  
Zhi Gang Chen
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Raw Materials ◽  
Photocatalytic Property ◽  
Reaction Model ◽  
Nanocomposite Powder ◽  
Transmission Electron ◽  
Sno2 Powder ◽  
Degradation Of Methyl Orange

ZnO/SnO2 nanocomposite powder were prepared by coprecipitation method with SnCl4·5H2O, ZnNO3·6H2O, HCl, NaOH as raw materials. Influence of different mol ratio of ZnO/SnO2 on the photocatalytic activity of ZnO/SnO2 nanocomposite powder was researched by the degradation of methyl orange as a reaction model. The particle size and dispersion of ZnO/SnO2 powder was characterized by transmission electron microscope(TEM). The results show that the photocatalytic activity of ZnO/SnO2 nanocomposite powder was increased significantly when compounded by SnO2, the photoactivating activity of ZnO/SnO2 powder starts increasing and then decreasing when the ratio of ZnO/SnO2 decreases. When ZnO:SnO2 is the ratio of 4:1(mol ratio)，the photocatalytic activity of ZnO/SnO2 nanocomposite powder is the best and the degradation rate of methyl orange is 42.09% when visible light illuminate for 225 minutes, particle size is 20-30 nanometer and dispersion is good.

Influence of Fe and Co and Cr Doped Amount on the Photoactivating Property of Nanometer ZnO Powder

2012 ◽  
Vol 182-183 ◽  
pp. 130-134 ◽  
Author(s):  
Xin You Huang ◽  
Chun Hua Gao ◽  
Zhi Gang Chen
Keyword(s):  
Particle Size ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Raw Materials ◽  
Methyl Orange Solution ◽  
Reaction Model ◽  
Transmission Electron ◽  
Doped Zno ◽  
Zno Powder ◽  
Orange Solution

Fe and Co and Cr doped nanometer ZnO powder was prepared respectively by coprecipitating method with ZnNO3•6H2O, HCl, NaOH, FeCl3•6H2O, CoCl2•6H2O, CrCl3•6H2O as raw materials. Influence of Fe and Co and Cr doped amount on the photoactivating property of nanometer ZnO photocatalyst powder was studied respectively by methyl orange solution as a reaction model. The particle size and dispersion of Fe-doped ZnO powder was characterized by transmission electron microscope(TEM). The results show that the photoactivating activity of nanometer ZnO powder starts increasing and then decreasing when Fe or Co or Cr doped amount decreases.The photoactivating activity of nanometer ZnO powder is maximum when Fe or Co or Cr doped amount is 0.2 wt.%, the degradation rate of methyl orange is 60.79%, 52.56%, 53.91% after ultraviolet light for 50 minutes, respectively. When Fe doped amount is 0.2wt.%, the degradation rate of methyl orange is the highest, the degradation rate of methyl orange is 60.79%, particle size is 20-30 nanometer and dispersion is good.

Preparation and Photocatalytic Property of Lanthanum-Doped TiO2 Nanoparticles

2012 ◽  
Vol 549 ◽  
pp. 584-588
Author(s):  
Qing Li ◽  
Rui Zhi Wen
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Methyl Orange ◽  
Particle Size Distribution ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Photocatalytic Efficiency ◽  
Mass Percentage ◽  
Supercritical Fluid Drying ◽  
Degradation Of Methyl Orange

Nano-TiO2 photocatalyst powders were prepared through the sol-gel method and supercritical fluid drying(SCFD). The TG-DTA、XRD、particle size distribution technique、SEM were used to characterize the hyperfine TiO2 particles.The lanthanum-doped TiO2 with different mass percentage of La3+ were compared with pure TiO2 when used as photocatalyst in degradation of methyl orange. The best catalytic activity was observed with 0.02(mol)%La-TiO2. Photocatalytic efficiency of the 0.02(mol)%La- TiO2 is improved by 30.79% comparing to pure TiO2.

Preparation and Photocatalytic Activity Research of Hollow Cubic TiO2 Particles

2011 ◽  
Vol 356-360 ◽  
pp. 558-564
Author(s):  
Xiao Wei Yuan ◽  
Xue Guo ◽  
Dan Dan Yang ◽  
Li Juan Wang ◽  
Mei Ling Cheng ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Property ◽  
Methyl Orange Solution ◽  
Tetrabutyl Titanate ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Orange Solution

Hollow cubic TiO2particles were synthesized using cubic Cu2O particles as hard templates, and the hydrolysis of tetrabutyl titanate (TBOT). The products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-Vis spectrometer, respectively. The results show that the prepared TiO2is composed of anatase TiO2, and has a stronger absorption in the range of 300-400nm wavelengths in its UV-Vis spectroscopy. Experiments were carried out using a methyl orange solution as a model to evaluate the photocatalytic activity of hollow cubic TiO2particles. The effects of catalyst dosage, initial concentration and pH of methyl orange solution on the degree of photodegradation have been investigated. It’s found that the hollow cubic TiO2particles have a good photocatalytic property. And the degradation rate of the methyl orange, after methyl orange solution (5mg/L) containing hollow cubic TiO2particles (0.5g/L) is irradiated by 125W ultraviolet light for 120 minutes, is 95%.

Photocatalytic Properties of Silver Oxide Loaded on Bismuth Vanadate

2013 ◽  
Vol 320 ◽  
pp. 654-660 ◽  
Author(s):  
Lian Wei Shan ◽  
Wei Li ◽  
Zhong Li ◽  
Jin Bo Mi ◽  
Da Sun ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Raw Materials ◽  
Sol Gel ◽  
Methyl Orange Solution ◽  
Photocatalytic Efficiency ◽  
Sintering Process ◽  
Calcination Time ◽  
Transmission Electron ◽  
Orange Solution

In order to enhance the photocatalytic activity of BiVO4, the Ag2O loaded on BiVO4is studied. In this study, Ag2O loaded on BiVO4was prepared with Bi(NO3)3, NH4VO3and C6H8O7as raw materials by sol-gel method. Influences of the sintering temperature and sintering time were studied on photocatalytic activity, crystal composition and molecular structure. The molecules of matter were characterized by FTIR. Both the phase transition in the sintering process and the influence of Ag2O loaded on crystal structure and size of the BiVO4powder were studied by XRD. The structure of the obtained samples were studied using transmission electron microscopy. The photocatalytic activity Ag2O loaded on BiVO4in different calcination time and different calcination temperature had been studied through the degradation methyl orange solution. It is found that the BiVO4photocatalytic efficiency of methyl orange is about 20% when the samples calcined for 4h and calcined at 500°C, the Ag2O loaded on BiVO4photocatalytic efficiency of methyl orange is doubled.

Effect of Samarium on the Photocatalytic Property of Sm-TiO2/CNFs Composites

2009 ◽  
Vol 79-82 ◽  
pp. 541-544 ◽  
Author(s):  
Li Ying Zhu ◽  
Xiao Ping Yang ◽  
Dong Hua Teng ◽  
Yun Hua Yu
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Tio2 Nanoparticles ◽  
Carbon Nanofibers ◽  
Uv Irradiation ◽  
Photocatalytic Property ◽  
Uniform Size ◽  
Degradation Of Methyl Orange

Composites of Sm doped TiO2 nanoparticles dispersed on carbon nanofibers (Sm-TiO2/CNFs) with different Sm contents were prepared by preoxidation, hydrolyzation and calcination of Sm-TiO2 precursor/PAN nanofibers. The characterizations of SEM, EDX, XPS and XRD showed that the CNFs surface was loaded by Sm-TiO2 nanoparticles with a uniform size of about 10nm, existing as anatase. It was concluded from XPS results that Ti element exist as Ti4+ and Sm doping increased the content of absorbed oxygen in composites. The effect of Sm doping on the photocatalytic activity of the Sm-TiO2/CNFs composite was investigated by the photocatalytic degradation of methyl orange aqueous solution under UV irradiation. It was found that Sm doping could improve the photocatalytic property of Sm-TiO2/CNFs effectively compared with the undoped specimen, and the photocatalytic activity of the Sm-TiO2/CNFs samples enhanced firstly and then reduced with Sm content increasing.

Synthesis and Photocatalytic Property of BiVO4 Photocatalyst by Cotton Fiber Template Method

2012 ◽  
Vol 460 ◽  
pp. 155-159
Author(s):  
Min Wang ◽  
Hai Yan Luan ◽  
Qiong Liu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Cotton Fiber ◽  
Photocatalytic Property ◽  
Template Method ◽  
Thermal Transition ◽  
Nano Fiber ◽  
Photocatalytic Material ◽  
Tube Structure ◽  
Degradation Of Methyl Orange

BiVO4 hollow nano-fiber photocatalytic material was prepared via two steps method of soaking and thermal transition using the cotton fiber as the template. The as-prepared samples were characterized by XRD, SEM and BET. The photocatalytic activity under visible light was evaluated by photocatalytic degradation of methyl orange(MO) in the solution. It was found that the samples calcinated at 400°C for 3.5 h had the hollow tube structure which is the copy of the cotton fibre structure and had the best photocatalytic activity. The decolorization rate of methyl orange can reach to be 97 % or so, increased 16 % than that of sample that prepared with no cotton fiber template. It indicated that the sample’s morphology and the specific surface area was the main reason of higher photocatalytic activity.

Visible-Light Photocatalytic Property of Titanate Nanotubes Sensitized by Several Porphyrins

2011 ◽  
Vol 239-242 ◽  
pp. 2403-2406
Author(s):  
Xiang Qing Li ◽  
Li Fang Liu ◽  
Shi Zhao Kang ◽  
Jin Mu ◽  
Guo Dong Li
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Fluorescence Spectra ◽  
Photocatalytic Property ◽  
Titanate Nanotubes ◽  
Visible Light Absorption ◽  
Visible Light Photocatalytic Activity ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

The visible-light photocatalytic activity of titanate nanotubes (TiNTs) sensitized by 5,10,15,20-tetraphenylporphyrin (TPP), 5,10,15,20-tetraphenylporphyrin manganese (MnTPP), 5,10,15,20-tetraphenylporphyrin nickel (NiTPP) and 5,10,15,20-tetraphenylporphyrin zinc (ZnTPP), respectively, was investigated by the photocatalytic degradation of methyl orange (MO) as a probe reaction. The results showed that the central ions of porphyrins had an important influence on the photocatalytic activity of the samples. The activity was in the order of TiNTs-ZnTPP > TiNTs-TPP > TiNTs-NiTPP > TiNTs-MnTPP. Combined the result of absorption spectra with that of fluorescence spectra, it was demonstrated that various visible-light absorption and photoelectron transfer caused by the central ions of porphyrins were the decisive factor for the visible-light photocatalytic activity of the sensitized TiNTs.

Preparation of Polyaniline-Modified TiO2 Nanoparticles by In Situ Chemical Oxidative Polymerization and their Photocatalytic Activity for the Degradation of Methyl Orange under Natural Light

2013 ◽  
Vol 669 ◽  
pp. 24-29
Author(s):  
Zhao Pin He ◽  
Yuan Chang Shi ◽  
Li Bo Sun ◽  
Bo Li ◽  
Hong Jiao Nie
Keyword(s):  
Photocatalytic Activity ◽  
Electron Microscope ◽  
Methyl Orange ◽  
Oxidative Polymerization ◽  
Natural Light ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
Transmission Electron ◽  
Degradation Of Methyl Orange

Polyaniline-modified nanocrystalline TiO2 composites were successfully prepared by in situ chemical oxidative polymerization and used as an efficient photocatalyst for the degradation of methyl orange under natural light. The nanocomposites were characterized by Transmission electron microscope (TEM), Scanning electron microscope (SEM), Fourier transform infrared spectra (FT-IR), X-ray diffraction and UV-Vis spectra. Results show that polyaniline-modified nanocrystalline TiO2 composites exhibit significantly higher photocatalytic activity than that of neat TiO2 on degradation of methyl orange under natural light. In addition, the conductivity of polyaniline-modified TiO2 nanoparticles was also investigated and has reached 2.65 × 10-1 S cm-1 at room temperature.

Photocatalytic Degradation of Methyl Orange Dye with Synthesized Chitosan/Fe2O3Nanocomposite and its Isotherm Studies.

2020 ◽  
Vol 16 ◽  
Author(s):  
Nimisha Jadon ◽  
Gulzar Ahmad Bhat ◽  
Manoharmayum Vishwanath Sharma ◽  
Harendra Kumar Sharma
Keyword(s):  
Methyl Orange ◽  
Dye Degradation ◽  
Dose Effect ◽  
X Ray Diffraction ◽  
Methyl Orange Degradation ◽  
Transmission Electron ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Vis Spectroscopy ◽  
Methyl Orange Dye ◽  
Degradation Of Methyl Orange

Background: The study focuses on the synthesis of chitosan/ Fe2O3 nanocomposite, its characterization and application in methyl orange dye degradation. Methods: The synthesized chitosan/ Fe2O3 nanocomposite was characterized with Powder X-Ray Diffraction, Fourier Transformation Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM) and UV-Vis Spectroscopy. Results: The characterization showed that the Fe2O3nanoparticles were embedded in the polymer matrix of chitosan. The size of the Fe2O3nanoparticles were less than 10nm and the crystallite size was 1.22 nm.The synthesized chitosan/ Fe2O3nanocomposite was tested for methyl orange degradation using different parameters such as effect of contact time, effect of dose, effect of concentration and effect of pH for the degradation of methyl orange dye in aqueous solution.The Fruendlich, Langmuir and Temkin isotherm studies were also conducted for adsoption of methyl orange on Chitosan/ Fe2O3nanocomposite. Conclusion: The study indicated that the synthesized chitosan/Fe2O3 nanocomposite had the potential of degrading methyl orange dye up to 75.04% under the set condition in this experiment which indicate that Chitosan/ Fe2O3 nanocomposite is a viable option that can be used for the degradation of methyl orange dye.

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