scholarly journals Optimization of pH and radiation time for photocatalytic activity of methyl orange using TiO2

2021 ◽  
Author(s):  
Siti Oryza Sativa ◽  
Muhammad Ali Zulfikar ◽  
Anita Alni
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Radiation Time

Research on Photocatalysis Properties of Nano TiO2/Mica Composite Material Prepared by the Method of Hydrolysis–Precipitation

2011 ◽  
Vol 694 ◽  
pp. 449-455 ◽  
Author(s):  
Song Zhou ◽  
Yu Cheng Wu ◽  
Jun Lv ◽  
Ling Kun Guo ◽  
Dong Mei Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Dense Layer ◽  
Mercury Lamp ◽  
Nano Tio2 ◽  
Tio2 Particles ◽  
Temperature Radiation ◽  
Mica Composite ◽  
Radiation Time

Using muscovite as the carrier, TiCl4 as the source of titanium, urea as the precipitating agent, nano-TiO2/mica photocatalyst (TiO2/M) was prepared by the method of hydrolysis–precipitation. The as - prepared photocatalyst was characterized by XRD, SEM, EDS and UV methods. The methyl orange was used as contamination simulation to test the photocatalytic activity of the materials. The influence of the calcination temperature, radiation time and photocatalyst adding amount on photocatalytic activity of methyl orange were also discussed. The SEM and XRD results showed that nano-TiO2 particles had been evenly coated on the muscovite surface to be a dense layer. The results showed that: the phases of as – prepared materials were mixed crystalline of anatase and rutile after calcinating from 400°C to 700°C; After calcinating at 400°C for 2h, and adding concentration was 2g/L, the material had the best photocatalytic activity, the degradation rate of methyl orange reached 98% after radiation under 300W mercury lamp for 60min.

Preparation of (Fe, Ni)-Codoped ZnO and Its Photocatalytic Activity for Deg-radation of Methyl Orange

2010 ◽  
Vol 31 (7) ◽  
pp. 797-802 ◽  
Author(s):  
Tianhua FU ◽  
Qianqian GAO ◽  
Fei LIU ◽  
Huajun DAI ◽  
Xingming KOU
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange

Solar, visible and UV light photocatalytic activity of CoWO4for the decolourization of methyl orange

2014 ◽  
Vol 54 (11) ◽  
pp. 3134-3145 ◽  
Author(s):  
Kandasamy Jothivenkatachalam ◽  
Saravanan Prabhu ◽  
Arjunan Nithya ◽  
Singaravelu Chandra Mohan ◽  
Kulandaivel Jeganathan
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Light

scholarly journals Zirconium-Doped Chromium IV Oxide Nanocomposites: Synthesis, Characterization, and Photocatalysis towards the Degradation of Organic Dyes

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 117
Author(s):  
Zahir Muhammad ◽  
Farman Ali ◽  
Muhammad Sajjad ◽  
Nisar Ali ◽  
Muhammad Bilal ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Solid State ◽  
Room Temperature ◽  
Organic Dyes ◽  
Uv Light ◽  
Heterogeneous Photocatalysis ◽  
Ft Ir ◽  
Complete Mineralization

Degradation of organic dyes and their byproducts by heterogeneous photocatalysts is an essential process, as these dyes can be potentially discharged in wastewater and threaten aquatic and xerophyte life. Therefore, their complete mineralization into nontoxic components (water and salt) is necessary through the process of heterogeneous photocatalysis. In this study, Zr/CrO2 (Zirconium-doped chromium IV oxide) nanocomposite-based photocatalysts with different compositions (1, 3, 5, 7 & 9 wt.%) were prepared by an environmentally friendly, solid-state reaction at room temperature. The as-prepared samples were calcined under air at 450 °C in a furnace for a specific period of time. The synthesis of Zr/CrO2 photocatalysts was confirmed by various techniques, including XRD, SEM, EDX, FT-IR, UV-Vis, and BET. The photocatalytic properties of all samples were tested towards the degradation of methylene blue and methyl orange organic dyes under UV light. The results revealed a concentration-dependent photocatalytic activity of photocatalysts, which increased the amount of dopant (up to 5 wt.%). However, the degradation efficiency of the catalysts decreased upon further increasing the amount of dopant due to the recombination of holes and photoexcited electrons.

scholarly journals The Role of H2C2O4 and Na2CO3 as Precipitating Agents on The Physichochemical Properties and Photocatalytic Activity of Bismuth Oxide

2020 ◽  
Vol 18 (1) ◽  
pp. 129-137
Author(s):  
Yayuk Astuti ◽  
Rizka Andianingrum ◽  
Abdul Haris ◽  
Adi Darmawan ◽  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Physicochemical Properties ◽  
Bismuth Oxide ◽  
Rate Constants ◽  
Degradation Rate ◽  
Precipitation Method ◽  
Methyl Orange Degradation ◽  
Methyl Orange Dye

AbstractSynthesis of bismuth oxide synthesis through the precipitation method using H2C2O4 and Na2CO3 precipitating agents, identification of physicochemical properties and its photocatalysis activity for methyl orange degradation were conducted. The bismuth oxide synthesis was undertaken by dissolving Bi(NO3)3.5H2O in HNO3, then added precipitating agents to form precipitate. The results showed that bismuth oxide produced by H2C2O4 precipitating agent was a yellow powder containing a mixture of α-Bi2O3 (monoclinic) and β-Bi2O3 (tetragonal), porous with size of 28-85 μm. Meanwhile, the use of Na2CO3 as precipitating agent resulted in bismuth oxide consisting of α-Bi2O3 and β-Bi2O3 and Bi2O4, irregular shape without pore being 40-115 μm in size. Bismuth oxide synthesized with H2C2O4 precipitating agent showed higher photocatalytic activity compared to bismuth oxide synthesized using Na2CO3 on degrading methyl orange dye with degradation rate constants of 2.35x10-5 s-1 for H2C2O4 and 1.81x10-5 s-1 for Na2CO3.

Synthesis of mesoporous titania and the photocatalytic activity for decomposition of methyl orange

2006 ◽  
Vol 60 (20) ◽  
pp. 2493-2496 ◽  
Author(s):  
Zhonghua Wang ◽  
Tingshun Jiang ◽  
Yongmin Du ◽  
Kangmin Chen ◽  
Hengbo Yin
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Mesoporous Titania
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