Photocatalytic Degradation of Methyl Orange by Cu2O-MoO3

2014 ◽  
Vol 665 ◽  
pp. 483-486 ◽  
Author(s):  
Tao Huang ◽  
Yu Lin Xu ◽  
Chong An Lv ◽  
Shui Jin Yang
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Room Temperature ◽  
Degradation Rate ◽  
Solution Phase ◽  
Natural Light ◽  
X Rays ◽  
Reaction Conditions ◽  
Catalyst Dosage ◽  
Degradation Of Methyl Orange

Cu2O-MoO3 composites has been successfully fabricated by solution-phase reducing method at room temperature. All the powders were characterized by X-rays diffraction (XRD) and scanning electron microscopy (SEM), and explored the catalytic activity for the photocatalytic degradation of methyl orange. The effect of different factors on the degradation was investigated. The best reaction conditions were found out. The results demonstrated that initial concentration of methyl orange is 5 mg/L, the pH is 4, the catalyst dosage is 0.38 g/L and the H2O2 is 1.8 mL, the degradation rate of methyl orange is as high as 95.4% after 30 minutes simulated natural light irradiation.

scholarly journals Photocatalytic Degradation of Methyl Violet with TiSiW12O40/TiO2

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Shuijin Yang ◽  
Yulin Xu ◽  
Yongkui Huang ◽  
Guohui Zhou ◽  
Zhiyuan Yang ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Methyl Violet ◽  
Light Irradiation ◽  
Natural Light ◽  
Order Kinetic ◽  
Solution Ph ◽  
Visible Spectra ◽  
Order Kinetic Model ◽  
Catalyst Dosage

The photocatalytic degradation of methyl violet using TiSiW12O40/TiO2as a novel eco-friendly catalyst under simulated natural light irradiation was investigated. The physical characterizations were carried out by TG/DTA, FT-IR, XRD, and UV-visible spectra. The effects of the initial methyl violet concentration, the solution pH, and catalyst dosage on the photocatalytic degradation rate of methyl violet were also examined. The results demonstrated that at optimal condition (initial concentration of methyl violet is 20 mg/L, catalyst dosage is 0.3 g, and the pH is 5.5), the degradation rate of methyl violet is as high as 82.4% after 3 h under simulated natural light irradiation. The reaction of photocatalysis for methyl violet can be expressed as first-order kinetic model.

Synthesis of a Carbon-Loaded Bi2O2CO3/TiO2 Photocatalyst with Improved Photocatalytic Degradation of Methyl Orange Dye

2020 ◽  
Vol 20 (12) ◽  
pp. 7653-7658 ◽  
Author(s):  
Kejun Lin ◽  
Jin Qian ◽  
Zehao ZhaO ◽  
Guanglei Wu ◽  
Hongjing Wu
Keyword(s):  
Free Radical ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Average Diameter ◽  
Tio2 Photocatalyst ◽  
Step Method ◽  
Photodegradation Efficiency ◽  
Hydroxyl Free Radical ◽  
Degradation Of Methyl Orange

A microflower-like C/Bi2O2CO3/TiO2 nanocomposite was prepared via a two-step method. Scanning electron microscopy (SEM) showed the sample to have a layered petal-like microstructure consisting of many nanosheets with an average diameter of 2–5 μm, along with activated carbon (AC) or carbon nanotubes (CNTs) and TiO2 nanoparticles deposited on the surface. Compared with pure Bi2O2CO3, Bi2O2CO3/TiO2 photocatalyst loaded with microflower-like carbon has a good degradation rate of methyl orange (MO) under visible light (0.019 min−1). The highest photodegradation efficiency of MO by AC or CNT-loaded Bi2O2CO3/TiO2 microflowers reached a maximum of 95% degradation after 180 minutes of reaction. The results show that the photocatalytic reaction of the hole and the hydroxyl free radical groups were important for the process of the photocatalytic degradation, and the effect of the hole was slightly greater than that of the hydroxyl free radical. After comparing the different photocatalysts, it showed that C and TiO2 could improve the photocatalytic activity of Bi2O2CO3-based photocatalysts.

scholarly journals Photocatalytic Degradation of Rhodamine B with H3PW12O40/SiO2Sensitized by H2O2

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Shuijin Yang ◽  
Yongkui Huang ◽  
Yunzhi Wang ◽  
Yun Yang ◽  
Mingbo Xu ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Rate ◽  
Sol Gel ◽  
Light Irradiation ◽  
Natural Light ◽  
Order Kinetic ◽  
Solution Ph ◽  
Order Kinetic Model ◽  
Catalyst Dosage

In order to remove aquatic organic dye contaminants by utilizing the inexpensive and inexhaustible solar energy, the Keggin-type H3PW12O40was loaded on the surface of SiO2with the sol-gel method and sensitized by H2O2solution. The photocatalytic degradation of rhodamine B (RhB) by H3PW12O40/SiO2(x) under simulated natural light irradiation was investigated. The effects of the initial RhB concentration, the solution pH, and catalyst dosage on the photocatalytic degradation rate of RhB were also studied. The results demonstrated that at optimal condition (initial concentration of methyl orange is 10 mg/L, catalyst dosage is 0.8 g, and the pH is 2.5) the degradation rate of RhB is as high as 97.7% after 2 h under simulated natural light irradiation. The reaction of photocatalysis for RhB can be expressed as a first-order kinetic model.

Photocatalytic degradation of methyl orange mediated by a silica coated nanomagnet porphyrin hybrid

2021 ◽  
Vol 938 ◽  
pp. 121751
Author(s):  
Kelly A.D.F. Castro ◽  
João M.M. Rodrigues ◽  
M. Amparo F. Faustino ◽  
João P.C. Tomé ◽  
José A.S. Cavaleiro ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Of Methyl Orange

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.

Kinetics Studies for Catalytic Oxidation of Methyl Orange over the Heterogeneous Fe/Beta Catalysts

2013 ◽  
Vol 807-809 ◽  
pp. 361-364
Author(s):  
Fang Guo ◽  
Jun Qiang Xu ◽  
Jun Li
Keyword(s):  
Activation Energy ◽  
Hydrogen Peroxide ◽  
Reaction Mechanism ◽  
Methyl Orange ◽  
Incipient Wetness Impregnation ◽  
Kinetics Studies ◽  
Optimum Reaction ◽  
Catalyst Dosage ◽  
Oxidation Degradation ◽  
Degradation Of Methyl Orange

The Fe/Beta catalysts were prepared by conventional incipient wetness impregnation. The catalysis oxidation degradation of methyl orange was carried out in catalyst and H2O2 process. The results indicated that the catalyst and hydrogen peroxide were more benefit to degradation of methyl orange. The reaction condition was optimized. The optimum reaction process was as follow: iron amount of catalyst was 1.25%, the catalyst dosage and H2O2 concentration was 1 mg/L and 1.5 mg/L, and reaction temperature was 70 °C. The apparent activation energy (65 KJ/mol) was obtained according to the arrhenius formula, which was benefit to study the reaction mechanism.

Sign in / Sign up

Export Citation Format

Share Document