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.

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.

Electrochemical Degradation of Methyl Orange by Samarium and Antimony Codoped SnO2 Electrodes

2014 ◽  
Vol 1004-1005 ◽  
pp. 962-966
Author(s):  
Lu Sheng Chen ◽  
Huan Shuang Zhang ◽  
Shu Lian Liu ◽  
Wen Hua Song ◽  
Chao Liu ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Calcination Temperature ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Methyl Orange Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electro Catalytic Activity ◽  
Orange Solution ◽  
Degradation Of Methyl Orange

In this work, samarium and antimony (Sm–Sb) codoped tin oxide (SnO2) films have been successfully prepared on titanium (Ti) substrate by a facile sol gel method. The samples were characterized by X–ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The composite film materials were used as anode for the electro-degradation of methyl orange solution. Two effective factors of electro–catalytic properties namely, the content of Sm in the SnO2 samples and the calcination temperature, have been optimized based on the electro-degradation experiments. A moderately calcination temperature of 873 K and 1.0% Sm doping owned the best performance. The smaller grain sizes and optical band gap of the SnO2 by introduction of the Sm improved electro-catalytic activity.

REE Lanthanum Doping Influence on the Photocatalysis Properties of Titanium Dioxide

2012 ◽  
Vol 550-553 ◽  
pp. 388-391
Author(s):  
Xing Jin ◽  
Jin Lan Lian ◽  
Yu Qiao
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Methyl Orange Solution ◽  
Lanthanum Doping ◽  
Light Area ◽  
Orange Solution

Lanthanum doping TiO2 were prepared by sol-gel method, an the photocatalytic degradation experiments were performed by using methyl orange solution as a target degradant. The results indicated that Suitable doping quantity of lanthanum can improve the photocatalytic activity of nanometer TiO2 powders. On the basis of 50 mL methyl orange solution what concentration is 20 mg/L, photocatalytic activity is the best when doping quantity of lanthanum were 1.0 wt %. Through the relatively experiments by using sunshine and ultraviolet as light source, the results indicated that the La3+ doping broaden the scope of visible light area what TiO2 response to.

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.

Effective photocatalytic degradation of an azo dye over nanosized Ag/AgBr-modified TiO2 loaded on zeolite

2011 ◽  
Vol 65 (3) ◽  
Author(s):  
Mohsen Padervand ◽  
Mahboubeh Tasviri ◽  
Mohammad Gholami
Keyword(s):  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
Catalyst Concentration ◽  
Sol Gel ◽  
Nitrogen Adsorption ◽  
Textile Dye ◽  
X Ray Diffraction ◽  
X Ray ◽  
Adsorption Desorption ◽  
Acid Blue

AbstractZeolite-based photocatalysts were prepared by the sol-gel and deposition methods. The photocatalysts were characterised by X-ray diffraction, nitrogen adsorption-desorption isotherms, FTIR spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectrometry. The activity of the prepared photocatalysts was evaluated by the UV-induced degradation of acid blue 92, a textile dye in common use. The effect of various parameters, such as catalyst concentration, initial dye concentration, thiosulphate concentration and pH, on the rate and efficiency of the photocatalytic degradation of acid blue 92 was investigated. The results showed that each parameter influenced the degradation rate and efficiency in a particular way. It was also found that, under optimised conditions, Ag/AgBr/TiO2/zeolite exhibited the highest photocatalytic performance. A comparison of catalytic activity when exposed to visible light under the same conditions showed that the photocatalysts containing AgBr had the highest activity.

Study on Photocatalytic Degradation Performance of Nano Carbon Load WO3 Doping TiO2 Composites

2014 ◽  
Vol 881-883 ◽  
pp. 901-904 ◽  
Author(s):  
Jing Zhang ◽  
Hui Hui Zhu ◽  
Kai Chen Lei ◽  
Heng Quan
Keyword(s):  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Doping Amount ◽  
X Ray ◽  
Maximum Value ◽  
Uv Visible ◽  
The Stability ◽  
Carbon Load

WO3doping TiO2composites with nanocarbon are prepared by sol-gel and hydrothermal, and the composites are studied by X-ray diffraction (XRD), UV-visible light scanning. The photocatalytic degradation effects of different conditions on the direct scarlet 4BS solution has been Investigated. The results show that doped WO3does not change the main structure of TiO2, but affect its crystalline properties. When WO3doping amount is 3.0 mol%, the crystallinity of composite reaches maximum value. The introduction of nanocarbon can improve the crystallinity of composite when the molar ratio of WO3doping is 3.0%, the photocatalytic activity is the highest, nanocarbon as a carrier can increase the photocatalyst adsorption capacity to achieve the objective of improving the photocatalytic efficiency when WO3and nanocarbon doped TiO2, the stability of the composite about catalytic activity is excellent.

The Study on the Influential Factors of Photocatalytic Performance of Eosin-Sensitized TiO2 Nanoparticles

2013 ◽  
Vol 827 ◽  
pp. 3-7
Author(s):  
Shun Jiang He ◽  
Xue Yan Du ◽  
Qiao Wang ◽  
Jing Xu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Influential Factors ◽  
Sunlight Irradiation ◽  
Sensitization Time

The photocatalytic activity of eosin-sensitized TiO2 nanoparticles on photocatalytic degradation rate (PDR) of methyl orange under sunlight irradiation was studied. The influential factors on the degradation, such as eosin concentration, TiO2 dosage, sensitization time and sensitization temperature were also investigated. The results show that: The performance of TiO2 nanoparticles for PDR of methyl orange has been improved obviously for eosin sensitizing. The PDR of methyl orange reached 45.28% under the conditions of eosin concentration of 20mg/L, TiO2 dosage of 0.5000g/L, sensitization time of 24h and sensitization temperature of 20°C.

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 Preparation of TiO2 nanorods by Sol–Gel template method and measured its photo- catalytic activity for degradation of methyl orange

2019 ◽  
Vol 13 (26) ◽  
pp. 171-177
Author(s):  
Ban M. Al-Shabander
Keyword(s):  
Methyl Orange ◽  
Sol Gel ◽  
Tio2 Nanorods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Photo Catalytic Activity ◽  
Atomic Force ◽  
Degradation Of Methyl Orange ◽  
Titanium Dioxide Nanorods

Titanium dioxide nanorods have been prepared by sol-gel templatemethod. The structural and surface morphology of the TiO2 nanorods wasinvestigated by X-ray diffraction (XRD) and atomic force microscopy(AFM), it was found that the nanorods produced were anatase TiO2 phase.The photocatalytic activity of the TiO2 nanorods was evaluated by thephoto degradation of methyl orange (MO). The relatively higherdegradation efficiency for MO (D%=78.2) was obtained after 6h of exposedto UV irradiation.

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.

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