Environmental Photochemistry on Semiconductor Surfaces:  Photosensitized Degradation of a Textile Azo Dye, Acid Orange 7, on TiO2Particles Using Visible Light

1996 ◽  
Vol 30 (5) ◽  
pp. 1660-1666 ◽  
Author(s):  
K. Vinodgopal ◽  
Darrel E. Wynkoop ◽  
Prashant V. Kamat
Keyword(s):  
Visible Light ◽  
Azo Dye ◽  
Semiconductor Surfaces ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Environmental Photochemistry

scholarly journals Enhanced visible-light-driven photodegradation of Acid Orange 7 azo dye in aqueous solution using Fe-N co-doped TiO2

2020 ◽  
Vol 13 (11) ◽  
pp. 8347-8360 ◽  
Author(s):  
Antonietta Mancuso ◽  
Olga Sacco ◽  
Diana Sannino ◽  
Stefania Pragliola ◽  
Vincenzo Vaiano
Keyword(s):  
Aqueous Solution ◽  
Visible Light ◽  
Azo Dye ◽  
Acid Orange 7 ◽  
Doped Tio2 ◽  
Acid Orange ◽  
Visible Light Driven ◽  
Co Doped

Fabrication of monoclinic BiVO4 photocatalyst film and its photocatalytic activity for organic pollutant removal

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Saranyoo Chaiwichian ◽  
Buagun Samran
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Average Particle Size ◽  
Pollutant Removal ◽  
Light Irradiation ◽  
Average Particle ◽  
Film Sample ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
X Ray

Abstract Monoclinic BiVO4 photocatalyst films decorated on glass substrates were successfully fabricated via a dip-coating technique with different annealing temperatures of 400 °C, 450 °C, 500°C, and 550 °C. All of the physical and chemical properties of as-prepared BiVO4 photocatalyst film samples were investigated using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and UV–vis diffuse reflectance spectra techniques. The results revealed that the as-prepared BiVO4 photocatalyst film samples retained a monoclinic phase with an average particle size of about 50 – 100 nm. Moreover, the BiVO4 photocatalyst film samples showed a strong photoabsorption edge in the range of visible light with the band gap energy of 2.46 eV. The photocatalytic activities of all the film samples were tested by the degradation of model acid orange 7 under visible light irradiation. The BiVO4 photocatalyst film sample annealed at a temperature of 500 °C showed the highest photoactivity efficiency compared with other film samples, reaching up to 51%within 180 min. In addition, the stability and reusability of BiVO4 photocatalyst film sample made with an annealing temperature of 500 °C did not show loss of photodegradation efficiency of acid orange 7 after ten recycles. A likely mechanism of the photocatalytic process was established by trapping experiments, indicating that the hydroxyl radical scavenger species can be considered to play a key role for acid orange 7 degradation under visible light irradiation.

Coagulation-flocculation of azo dye Acid Orange 7 with green refined laterite soil

2014 ◽  
Vol 246 ◽  
pp. 383-390 ◽  
Author(s):  
Yen-Yie Lau ◽  
Yee-Shian Wong ◽  
Tjoon-Tow Teng ◽  
Norhashimah Morad ◽  
Mohd Rafatullah ◽  
...  
Keyword(s):  
Azo Dye ◽  
Acid Orange 7 ◽  
Laterite Soil ◽  
Acid Orange

Notes on heterogeneous photocatalysis with the model azo dye acid orange 7 on TiO2

2012 ◽  
Vol 106 (2) ◽  
pp. 297-311 ◽  
Author(s):  
Michal Baudys ◽  
Martin Zlámal ◽  
Josef Krýsa ◽  
Jaromír Jirkovský ◽  
Petr Kluson
Keyword(s):  
Azo Dye ◽  
Heterogeneous Photocatalysis ◽  
Acid Orange 7 ◽  
Acid Orange
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