scholarly journals Cu-ZnO nanoparticles for photocatalytic degradation of methyl orange

2021 ◽  
Vol 3 (8) ◽  
pp. 521-525
Author(s):  
Raviraj M. Kulkarni ◽  
Ramesh S. Malladi ◽  
Manjunath S. Hanagadakar
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Zno Nanoparticles ◽  
Degradation Of Methyl Orange

Solar-light-driven photocatalytic degradation of methyl orange dye over Co3O4-ZnO nanoparticles

2021 ◽  
Vol 284 ◽  
pp. 128902 ◽  
Author(s):  
Vy Anh Tran ◽  
Thanh Khoa Phung ◽  
Van Thuan Le ◽  
The Ky Vo ◽  
Tan Tai Nguyen ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Zno Nanoparticles ◽  
Solar Light ◽  
Methyl Orange Dye ◽  
Degradation Of Methyl Orange

scholarly journals Efficient and Rapid Photocatalytic Degradation of Methyl Orange Dye Using Al/ZnO Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1059
Author(s):  
Piangjai Peerakiatkhajohn ◽  
Teera Butburee ◽  
Jung-Hoon Sul ◽  
Supphasin Thaweesak ◽  
Jung-Ho Yun
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Removal Efficiency ◽  
Zno Nanoparticles ◽  
Light Absorption ◽  
Uv Light ◽  
Light Irradiation ◽  
Zno Nps ◽  
Calcination Temperatures ◽  
Degradation Of Methyl Orange

ZnO and Aluminum doped ZnO nanoparticles (Al/ZnO NPs) were successfully synthesized by the sol-gel method. Together with the effect of calcination temperatures (200, 300 and 400 °C) and Al dosage (1%, 3%, 5% and 10%) on structural, morphological and optical properties of Al/ZnO NPs, their photocatalytic degradation of methyl orange (MO) dye was investigated. The calcination temperatures at 200, 300 and 400 °C in forming structure of ZnO NPs led to spherical nanoparticle, nanorod and nanoflake structures with a well-crystalline hexagonal wurtzite, respectively. The ZnO NPs calcined at 200 °C exhibited the highest specific surface area and light absorption property, leading to the MO removal efficiency of 80% after 4 h under the Ultraviolet (UV) light irradiation. The MO removal efficiency was approximately two times higher than the nanoparticles calcined at 400 °C. Furthermore, the 5% Al/ZnO NPs exhibited superior MO removal efficiency of 99% in only 40 min which was approximately 20 times enhancement in photocatalytic activity compared to pristine ZnO under the visible light irradiation. This high degradation performance was attributed to the extended light absorption, narrowed band gap and effective suppression of electron–hole recombination through an addition of Al metal.

scholarly journals Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol

Water ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3224
Author(s):  
Ying Wang ◽  
Chuanxi Yang ◽  
Yonglin Liu ◽  
Yuqi Fan ◽  
Feng Dang ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Zno Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Zno Nps ◽  
Uniform Size ◽  
X Ray ◽  
Degradation Rates ◽  
Degradation Of Methyl Orange

The photocatalytic degradation of organic pollutants is an effective method of controlling environmental pollution. ZnO nanoparticles (ZnO NPs) were prepared by the solvothermal method and characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV–visible diffuse reflectance spectroscopy (UV–Vis DRS). The results showed that the ZnO NPs had a uniform size of 25–40 nm, hexagonal wurtzite structure, and a band gap of 2.99 eV. The photocatalytic degradation of methyl orange (MO) and p-nitrophenol (PNP) was used as a model reaction to evaluate the photocatalytic activity of ZnO NPs. The photocatalytic degradation rates (pseudo-first-order kinetics) of MO and PNP were 92% (0.0128 min−1) and 56.2% (0.0042 min−1), respectively, with a 25 W ultraviolet lamp, MO/PNP concentration = 20 mg/L, ZnO NPs dose = 1.5 g/L, and time = 180 min. The photocatalytic mechanism of ZnO NPs and degradation pathways of MO and PNP were also proposed. The results provide valuable information and guidance for the treatment of wastewater via photocatalytic methods.

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
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