Preparation and Photocatalytic Performance of TiO2/Modified Expandable Graphite Composite Material

2014 ◽  
Vol 618 ◽  
pp. 76-80
Author(s):  
Hong Lun Wang ◽  
Qin Deng ◽  
Hui Liu ◽  
Yan Zi Zhou ◽  
Yan Zong Zhang
Keyword(s):  
Composite Material ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Expandable Graphite ◽  
Graphite Composite ◽  
Gel Method ◽  
Photocatalytic Effect ◽  
Better Than

In this paper, TiO2/modified expandable graphite composite material was prepared through sol-gel method with the carrier of modified expandable graphite.The influence of this composite material prepared in different calcination environment and with different times of load on the effect of methyl orange solution’s photocatalytic degradation was studied. Results show that the photocatalytic effect is better by using the composite material with the same times of load in aerobic calcination than that in anaerobic calcination. In the same calcination environment, the photocatalytic effect with 5 times of load is better than that with 1, 2, 3 and 4 times of load. Whether in the aerobic calcination or in the anaerobic calcination, the photocatalytic effect is better if the composite material is loaded 5 times.

scholarly journals Magnetic PbFe12O19-TiO2 nanocomposites and their photocatalytic performance in the removal of toxic pollutants

2018 ◽  
Vol 41 (3-4) ◽  
pp. 53-62 ◽  
Author(s):  
Behnaz Lahijani ◽  
Kambiz Hedayati ◽  
Mojtaba Goodarzi
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Effect ◽  
Transmission Electron ◽  
Ultraviolet Light Irradiation

Abstract In this work, the PbFe12O19 nanoparticles were prepared by the simple and optimized precipitation method with different organic surfactants and capping agents. In the next step, the TiO2 nanoparticles were synthesized using the sol-gel method. At the final step, the PbFe12O19-TiO2 nanocomposites were prepared via the sol-gel method. The effect of the precipitating agent on the morphology and particle size of the products was investigated. The prepared products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy. The results obtained by the vibrating sample magnetometer show the magnetic properties of the ferrite nanostructures. The photocatalytic effect of the PbFe12O19-TiO2 nanocomposite on the elimination of the azo dyes (acid black, acid violet and acid blue) under ultraviolet light irradiation was evaluated. The results indicate that the prepared nanocomposites have acceptable magnetic and photocatalytic performance.

scholarly journals An Ultrasound Application for TiO2 Photocatalytic Degradation of Methyl Orange

2021 ◽  
Author(s):  
Xianzhen Diao ◽  
Jin XU ◽  
Yufei WANG
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Methyl Orange Solution ◽  
X Ray Diffraction ◽  
Doping Amount ◽  
Nickel Doping ◽  
Ultrasound Application ◽  
Ultrasound Technology

Nanometer TiO2 photocatalysts were prepared by the sol–gel method. The catalysts were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, and other techniques. Methyl orange solution was used for the degradation of the organic material and ultrasonic technology was used to determine the photocatalytic performance of the catalysts. The results show that the photocatalytic performance of the Ni-N-TiO2 is clearly improved under ultrasonic conditions. The TiO2 photocatalytic degradation effect is optimal at a catalyst concentration of 0.3 g/L, an initial concentration of the organic matter of 0.03 mmol/L, a nickel-doping amount of 2 mol %, and a nitrogen-doping amount of 15 mol %. The use of ultrasound technology in combination with photocatalysis has a positive effect and results in a TiO2 degradation rate of methyl orange of 95 % after 3 h.

Electro-Assisted Photocatalytic Degradation of Methyl Orange on TiO2 Film Using CaСl2 as Electrolyte

2012 ◽  
Vol 487 ◽  
pp. 635-639
Author(s):  
Wen Jie Zhang ◽  
Hong Liang Xin ◽  
Hong Bo He
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Tio2 Film ◽  
Sol Gel ◽  
Degradation Process ◽  
Applied Potential ◽  
Methyl Orange Degradation ◽  
Degradation Rates ◽  
Smooth Film ◽  
Better Than

Porous and smooth TiO2 film electrodes prepared by sol-gel method were used on methyl orange degradation by an electro-assisted photocatalytic degradation process. Methyl orange cannot be degraded under applied potential solely below 2.0 V. When the applied potential was below 1.3 V, methyl orange degradation rates on porous TiO2 film increased from 5% at 0 V to 65.3% at 1.3 V, and degradation rates on smooth TiO2 film changed from 2.2% at 0 V to 61.1% at 1.3 V. Electro-assisted photocatalytic degradation rate on porous film was better than that on smooth film in the whole electrolyte concentration range. Electro-assisted degradation exhibited the same rising trend along with reaction time on the porous and smooth films.

Influence of Stabilizer on the Microstructures and Photocatalytic Performance of ZnO Nanopowder Synthesized by Sol-Gel Method

2017 ◽  
Vol 50 ◽  
pp. 57-71 ◽  
Author(s):  
Xiao Nan Xu ◽  
Qiu Ping Zhang ◽  
Brain T.M. Ong ◽  
Huan Yuan ◽  
Yu Chen ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Surface Defects ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Microstructural Analysis ◽  
Volume Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Effect ◽  
Degradation Of Methyl Orange

Utilizing zinc acetate as precursor, and monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA) as stabilizers, respectively, ZnO nanoparticles with uniformly distributed grains were synthesized by sol-gel method at different sintering temperatures. Analysis of the degradation of methyl orange by photocatalysis shows that utilizing MEA as the stabilizer and 550°C as the sintering temperature results in smaller grain size, greater surface-to-volume ratio, and a density of surface defects suitable for a photocatalyst. The greatest photocatalytic degradation of methyl orange was achieved under UV irradiation. Based on our microstructural analysis and photocatalysis, the microstructure of ZnO particles and, in turn, their photocatalytic effect are affected significantly by the stabilizer type and the sintering temperature.

Study on the Photocatalytic Properties with Different Ratio Films of ZnO:Fe2O3

2013 ◽  
Vol 750-752 ◽  
pp. 1836-1839
Author(s):  
Gui Qin Hou ◽  
Shui Jing Gao ◽  
Wen Li Zhang
Keyword(s):  
Photocatalytic Performance ◽  
Sol Gel ◽  
Photocatalytic Properties ◽  
Nanocomposite Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Effect

The nanocomposite films with different ZnO:Fe2O3 ratio was prepared by Sol-Gel method on slides glass, Its structure performance was characterized by XRD, SEM, and the photocatalytic performance of different ZnO: Fe2O3 ratio films was investigated. The results showed that: the three layers film that with Zn: Fe ratio was 1:2, had the best photocatalytic effect.

Synthesis of nitrogen-doped ZnO by sol–gel method: characterization and its application on visible photocatalytic degradation of 2,4-D and picloram herbicides

2015 ◽  
Vol 14 (3) ◽  
pp. 536-542 ◽  
Author(s):  
J. J. Macías-Sánchez ◽  
L. Hinojosa-Reyes ◽  
A. Caballero-Quintero ◽  
W. de la Cruz ◽  
E. Ruiz-Ruiz ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Zno Nanoparticles ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Light Irradiation ◽  
Gel Method ◽  
Nitrogen Doped ◽  
Doped Zno

The photocatalytic performance of modified 30% wt. N-ZnO nanoparticles under visible light irradiation was demonstrated by the oxidation of picloram and 2,4-D.

Preparation and Photocatalytic Performance Study of La-WO3 Co-Doping TiO2

2014 ◽  
Vol 936 ◽  
pp. 809-813 ◽  
Author(s):  
Xian Zhen Diao ◽  
Dong Zhou
Keyword(s):  
Methyl Orange ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Treatment Temperature ◽  
Performance Study ◽  
Co Doping ◽  
Photocatalytic Effect ◽  
Infrared Spectrometer ◽  
Methyl Orange Concentration

Butyl titanate as titanium source, anhydrous ethanol as solvent, glacial acetic acid as inhibitor, La-WO3/TiO2, La/TiO2, WO3/TiO2and pure TiO2 photocatalysts were prepared through sol-gel method; At the same time, both of which were characterized by infrared spectrometer and uv-vis spectrophotometer; With methyl orange as simulated target degradation material, heat treatment temperature、different dopants, etc. on photocatalytic performance influences of TiO2were studied by spectrophotometer. Experimental results show that doping can improve obviously the photocatalytic activity of TiO2. When calcination temperature is 500 ℃, dosage of catalyst is 0.25 g, pH is 1, and methyl orange concentration is 10 mg/L, La-WO3/TiO2 photocatalytic effect is best, and degradation rate is 46.18%.

scholarly journals Perovskite Zinc Titanate Photocatalysts Synthesized by the Sol–Gel Method and Their Application in the Photocatalytic Degradation of Emerging Contaminants

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 854
Author(s):  
Wei-Yu Chen ◽  
Ching-Ping Wang ◽  
Po-Chou Chen ◽  
Kun-Yi Andrew Lin ◽  
Surajit Ghosh ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Emerging Contaminants ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Emerging Contaminant ◽  
Zinc Titanate ◽  
Gel Method ◽  
Sol Gel Method ◽  
Synthesis Conditions ◽  
Additional Amount

In this study, perovskite ZnTiO3 photocatalysts were fabricated by the sol–gel method. The photocatalytic capability was verified by the degradation of the emerging contaminant, the antibiotic amoxicillin (AMX). For the preparation, the parameters of the calcination temperature and the additional amount of polyvinylpyrrolidone (PVP) and ammonia are discussed, including the calcining temperature (500, 600, 700, 800 °C), the volume of ammonia (750, 1500, 3000 μL), and the weight of PVP (3 g and 5 g). The prepared perovskite ZnTiO3 was characterized by XRD, FESEM, BET, and UV-Vis. It is shown that the perovskite ZnTiO3 photocatalysts are structurally rod-like and ultraviolet light-responsive. Consequently, the synthesis conditions for fabricating the perovskite ZnTiO3 photocatalysts with the highest photocatalytic performance were a calcining temperature of 700 °C, an additional ammonia amount of 1500 μL, and added PVP of 5 g. Moreover, the photocatalytic degradation of perovskite ZnTiO3 photocatalysts on other pollutants, including the antibiotic tetracycline (TC), methyl orange (MO), and methylene blue (MB) dyes, was also examined. This provides the basis for the application of perovskite ZnTiO3 as a photocatalyst to decompose emerging contaminants and organic pollutants in wastewater treatment.

Photocatalytic Degradation of Methyl Orange by Cadmium Oxide Nanoparticles Synthesized by the Sol-gel method

Optik ◽  
2021 ◽  
pp. 168401
Author(s):  
Shamim Ahamad Khan ◽  
Manaal Zahera ◽  
Irfan Ali Khan ◽  
Mohd Sajid Khan ◽  
Ameer Azam ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Cadmium Oxide ◽  
Oxide Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Degradation Of Methyl Orange
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