Photocatalytic Performance of ZnO Prepared by Sol-Gel Method with the Assistance of CTAB

2014 ◽  
Vol 881-883 ◽  
pp. 256-259
Author(s):  
Hua Fang ◽  
Wei Wu ◽  
Zhun Huang
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Cetyltrimethylammonium Bromide ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Bet Method

ZnO photocatalyst was prepared by sol-gel method with the assistance of cetyltrimethylammonium bromide (CTAB). The specific surface area and structure were characterized by Brunauer-Emmett-Teller (BET) method and X-ray diffraction (XRD), respectively. The photocatalytic activity of ZnO prepared for decolorization of methyl orange (MO) aqueous solution was evaluated. The results show that ZnO (mol ratio of ZnO/CTAB is 10) baked at 500°C holds the best photocatalytic activity.

Photocatalytic Activity of Sm, Zr Co-Doped TiO2 Synthesized by Ultrasonic Assisted Sol-Gel Method

2013 ◽  
Vol 631-632 ◽  
pp. 399-403
Author(s):  
Xi Ming Luo ◽  
Fen Fen Li ◽  
Hong Tao Gao
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Ultrasonic Assisted ◽  
Uv Visible

Sm, Zr doped nanocrystalline TiO2 powers were prepared successfully by a facile ultrasonic assisted sol-gel method. The products were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. X-ray diffraction peaks could be assigned to anatase TiO2, which confirms the crystallinity of the as-prepared samples. The SEM images demonstrated that the crystalinity is formed with spherical aggregates with average diameters ranging from 10 to 20 nm. The photocatalytic activity was studied on the photocatalytic degradation of methyl orange (MO) aqueous solution irradiated with UV-visible light. Under UV-visible light irradiation, the photocatalytic performances of the doped samples were much better than that of pure TiO2, and the co-dopant showed highest. It demonstrated that a strong Sm-Zr synergistic interaction might play a decisive role in driving the excellent photocatalytic performance of TiO2.

Preparation of Doped TiO2 Responded to Visible Light

2014 ◽  
Vol 936 ◽  
pp. 819-821
Author(s):  
Yan Huai Zhou ◽  
Xing He Wang ◽  
Jia Chen ◽  
Rui Pu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Absorbance Spectroscopy ◽  
Uv Visible ◽  
Co Doped

Cu-N co-doped TiO2powder was prepared by sol-gel method. The Powder was characterized by X-ray diffraction (XRD) and UV-Visible absorbance spectroscopy (UV-Vis). The X-ray results indicated that Cu-N co-doped has no effect on its anatase type. The UV-Vis results show that the absorb threshold has extend to visible-light, the absorbility of co-doped TiO2is higher than that of pure TiO2, and the Photocatalytic activity has been increased.

Study on the Dispersion of Nanometer TiO2 Powder by Sol-Gel Method

2012 ◽  
Vol 599 ◽  
pp. 104-107
Author(s):  
Fang Zhao ◽  
Ya Qiong Zhao ◽  
Yuan Yuan Li ◽  
Gang Ni
Keyword(s):  
Photocatalytic Activity ◽  
Nonionic Surfactants ◽  
Anatase Phase ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Tem Analysis ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Transmission Electron

This study investigated the effect of cationic, anionic, and nonionic surfactants on the formation, morphology, and surface properties of TiO2 nanoparticles synthesized by modified sol-gel method. The crystalline structures and morphologies of the powder have been characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD results showed TiO2 nanoparticles synthesized with different surfactants only include anatase phase. The TEM analysis revealed the surfactants can enhance dispersion of TiO2 nanoparticles. In contrast, the anionic surfactants showed hightly effects. The photocatalytic activity of samples was tested for degradation of methyl orange (MO) solutions. The results showed photocatalytic activity of the catalyst with surfactants was higher than pure TiO2 under ultraviolet.

scholarly journals Structural and Photocatalytic Properties of TiO2/Zeolite Synthesized using Sol-Gel Method

ALCHEMY ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 25
Author(s):  
Nur Aini ◽  
Fahmi Eksa Sagita ◽  
Khoridatud Diyanah ◽  
Aminatus Arifah ◽  
Siti Nur Chasanah ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Natural Zeolite ◽  
Vibration Mode ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Methylene Blue Degradation ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method

<p class="BodyAbstract">Titanium dioxide (TiO<sub>2</sub>) is supported into natural zeolite to enhance its photocatalytic activity. TiO<sub>2</sub>/zeolite is synthesized using sol-gel method at composition ratio of 5:95; 10:90; 20:80 and 30:70%. Structural properties are measured by X-ray diffraction showed TiO<sub>2</sub>/zeolite in various composition has characteristic of anatase and modernite phase. The energy dispersive spectroscopy characterization shows TiO<sub>2</sub>/zeolite containing Ti element which indicates that TiO<sub>2</sub><sub>i</sub>s successfully supported into natural zeolite<sub>. </sub>Vibration mode of Infrared and Raman spectra tend shifted to higher wavenumber as increasing of TiO<sub>2</sub> content indicating the higher energy vibration due to molecular interaction between TiO<sub>2</sub> and zeolite. Photocatalytic activity test toward methylene blue degradation shows that TiO<sub>2</sub>/zeolite has higher activity than TiO<sub>2</sub> and zeolite itself.</p><p class="BodyAbstract">Keywords: Photocatalyst, titanium dioxide, zeolite<em></em></p>

Preparation, Characterization and Photocatalytic Preoperty of BiVO4 Photocatalyst by Sol-Gel Method

2011 ◽  
Vol 99-100 ◽  
pp. 1307-1311 ◽  
Author(s):  
Min Wang ◽  
Qiong Liu ◽  
Hai Yan Luan
Keyword(s):  
Photocatalytic Activity ◽  
Citric Acid ◽  
Sol Gel ◽  
Molar Ratio ◽  
Halogen Lamp ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Photodegradation Rate

Bismuth vanadate (BiVO4) powders were synthesized by complexing Sol-Gel method using citric acid as chelate,calcined at different temperature 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. It revealed that temperature values can influence significantly on the morphologies and structures of the products.It also found that the sample prepared with the molar ratio of citric acid to metal inons be 2:1, pH=7 and calcinated under 400°C for 5 hours was pure monoclinic BiVO4 phase.In this conditions, the sample had highest photocatalytic activity with the photodegradation rate was about 94% or so in 20min under 250W halogen lamp.

Synthesis, Characterization and Study of the Photocatalytic Activity of the Ti/Fe Mixed Oxide

2014 ◽  
Vol 17 (2) ◽  
Author(s):  
Franciély Ignachewski ◽  
Eryza G. de Castro ◽  
Fauze J. Anaissi ◽  
Sérgio T. Fujiwara
Keyword(s):  
Photocatalytic Activity ◽  
Titanium Oxide ◽  
Mixed Oxide ◽  
Mixed Oxides ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method

AbstractThe mixed oxides of Ti/Fe were prepared by sol-gel method and the materials were synthesized with different Ti/Fe ratios (0, 25, 50 and 75 wt% of iron). In the spectrum of the material without iron, it is possible to observe the predominant phase of the titanium oxide was anatase, which can be confirmed through x-ray diffraction. It can be observed that when the iron was added, the predominant phase of the titanium oxide was rutile and was found evidence of the formation of pseudobrookite (Fe

Impedance Spectroscopy Study of LiTaO3 Powder Synthesized via Sol-Gel Method

2012 ◽  
Vol 545 ◽  
pp. 275-278 ◽  
Author(s):  
Lili Widarti Zainuddin ◽  
Norlida Kamarulzaman
Keyword(s):  
Room Temperature ◽  
Single Phase ◽  
Sol Gel ◽  
Rhombohedral Structure ◽  
Spectroscopy Study ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Impedance Spectroscopy Study

A ceramics sample of LiTaO3 was prepared using a sol-gel method. The sample is annealed at 750 °C for 48 hours. X-ray diffraction analysis indicate the formation of single phase, rhombohedral structure. An ac impedance study was used to analyse the conductivity of LiTaO3 at room temperature and at various temperatures.

Magnetic Properties of Bulk Zn0.95-XMnXFe0.05O2 Prepared by Sol-Gel Method and Subsequent Hot Pressing

2011 ◽  
Vol 268-270 ◽  
pp. 356-359 ◽  
Author(s):  
Wen Song Lin ◽  
C. H. Wen ◽  
Liang He
Keyword(s):  
Magnetic Properties ◽  
Photoelectron Spectroscopy ◽  
Raw Materials ◽  
Sol Gel ◽  
Secondary Phase ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Doped Zno

Mn, Fe doped ZnO powders (Zn0.95-xMnxFe0.05O2, x≤0.05) were synthesized by an ameliorated sol-gel method, using Zn(CH3COO)2, Mn(CH3COO)2and FeCl2as the raw materials, with the addition of vitamin C as a kind of chemical reducer. The resulting powder was subsequently compacted under pressure of 10 MPa at the temperature of 873K in vacuum. The crystal structure and magnetic properties of Zn0.95-xMnxFe0.05O2powder and bulk samples have been investigated by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). X-ray photoelectron spectroscopy (XPS) was used to study chemical valence of manganese, iron and zinc in the samples. The x-ray diffraction (XRD) results showed that Zn0.95-xMnxFe0.05O (x≤0.05) samples were single phase with the ZnO-like wurtzite structure. No secondary phase was found in the XRD spectrum. X-ray photoelectron spectroscopy (XPS) showed that Fe and Mn existed in Zn0.95-xMnxFe0.05O2samples in Fe2+and Mn2+states. The results of VSM experiment proved the room temperature ferromagnetic properties (RTFP) of Mn, Fe co-doped ZnO samples.

scholarly journals Effect of Preheating Temperature on Synthesis of Pure BiFeO3 via Sol–Gel Method

Nanopages ◽  
2019 ◽  
pp. 1-11
Author(s):  
G. M. Taha ◽  
M. N. Rashed ◽  
M. S. El-Sadek ◽  
M. A. Moghazy
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Pure Bifeo3 ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Transmission Electron ◽  
Preheating Temperature

Abstract BiFeO3 (BFO) nanopowder was synthesized in a pure form via a sol- gel method based on glycol gel reaction. Effect of drying and preheating temperature on preventing other phases was studied. Many parameters were studied as calcination temperature and time & stirring temperature as well. The prepared powder was characterized by X-Ray Diffraction of powder (XRD) and Transmission Electron Microscope (TEM). High pure BiFeO3 was obtained by preheated process at 400 °C for 0.5 h and calcination at 600 °C for 0.5 h without any impurities compared to dry at110 °C.

Effect of Synthesis Conditions on the Structure and Electrochemical Properties of LiNi1/2Mn1/2O2 by Sol Gel Method

2011 ◽  
Vol 399-401 ◽  
pp. 1447-1450
Author(s):  
Zhi Yong Yu ◽  
Han Xing Liu
Keyword(s):  
Electrochemical Properties ◽  
Sol Gel ◽  
Electrochemical Analysis ◽  
X Ray Diffraction ◽  
Capacity Fading ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Synthesis Conditions ◽  
A Current

The layered LiNi1/2Mn1/2O2 cathode materials were synthesized by a sol gel method. The effects of calcination temperature and time on the structural and electrochemical properties of the LiNi1/2Mn1/2O2 were investigated. The prepared samples were characterized by X-ray diffraction (XRD) and electrochemical analysis. The results revealed that the layered LiNi1/2Mn1/2O2 material could be optimal synthesized at temperature of 900°C for 10h. The sample prepared under the above conditions has the highest initial discharge capacity of 151 mAh/g and showed no dramatic capacity fading during 20 cycles between 2.5-4.5V at a current rate of 20mA/g.

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