Visible light sensitive activated carbon-metal oxide (TiO2, WO3, NiO, and SnO) nano-catalysts for photo-degradation of methylene blue: a comparative study

2018 ◽  
Vol 100 (2) ◽  
pp. 143-156 ◽  
Author(s):  
Radwa A. El-Salamony ◽  
Enas Amdeha ◽  
Nagwa A. Badawy ◽  
Salwa A. Ghoneim ◽  
Ahmed M. Al-Sabagh
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Metal Oxide ◽  
Comparative Study ◽  
Visible Light ◽  
Photo Degradation ◽  
Nano Catalysts

Photo-catalytic Study of Malachite Green Dye Degradation Using Rice Straw Extracted Activated Carbon Supported ZnO Nano-particles

2020 ◽  
Vol 10 (6) ◽  
pp. 849-859
Author(s):  
Radwa A. El-Salamony ◽  
Abeer A. Emam ◽  
Nagwa A. Badawy ◽  
Sara F. El-Morsi
Keyword(s):  
Activated Carbon ◽  
Visible Light ◽  
Rice Straw ◽  
Malachite Green ◽  
Dye Degradation ◽  
Nano Particles ◽  
Oh Radicals ◽  
Impregnation Method ◽  
Photo Degradation ◽  
Malachite Green Dye

Objective: ZnO nanoparticles were synthesized using wet impregnation method, and activated carbon from rice straw (RS) prepared through chemical route. Methods: The nano-composites ZnO-AC series were prepared with different ZnO:AC ratio of 10, 20, 50, and 70% to optimize the zinc oxide nanoparticles used. The obtained composites were characterized by FE-SEM, XRD, SBET, and optical techniques then used for the photo-degradation of Malachite green dye (MG) under visible light. Results: It was found that 10ZnO-AC exhibited excellent visible light photo-catalytic performance. The ·OH radicals’ formation is matching with photo-activity of the prepared composites. The photo-degradation efficiency of MG increased from 63% to 93%, when the 10ZnO-AC photocatalyst amount was increased from 0.5 to 6 g/L. Conclusion: The GC-MS technique was used to analyze the intermediates formed; up to 15 kinds of chemicals were identified as the degradation products.

scholarly journals Visible-enhanced photocatalytic performance of CuWO4/WO3 hetero-structures: incorporation of plasmonic Ag nanostructures

2018 ◽  
Vol 42 (13) ◽  
pp. 11109-11116 ◽  
Author(s):  
R. Salimi ◽  
A. A. Sabbagh Alvani ◽  
N. Naseri ◽  
S. F. Du ◽  
D. Poelman
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Light Irradiation ◽  
Photo Degradation ◽  
Gel Method ◽  
Sol Gel Method

A new plasmonic Ag hybridized CuWO4/WO3 heterostructured nanocomposite was successfully synthesized via a ligand-assisted sol gel method and the photocatalytic activity was evaluated by photo-degradation of methylene blue (MB) under visible light irradiation.

The Preparation of C, N, S Tri-Doped TiO2 and Visible-Light Photo-Degradation of Methylene Blue and Dyes

2011 ◽  
Vol 287-290 ◽  
pp. 1735-1743 ◽  
Author(s):  
Yi Dong Shi ◽  
Qiong Guo ◽  
Yuan Song Xie
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Degradation Rate ◽  
Raw Material ◽  
Precipitation Method ◽  
Light Sources ◽  
Visible Absorption ◽  
Photo Degradation ◽  
X Ray

The C, N, S tri-doped TiO2 with high visible-light photo-catalysis effect was successfully prepared by mixing thiourea with the self-prepared TiO2 powder through calcining for 2h at 450°C. The TiO2 powder was obtained by homogeneous precipitation method using the metatitanic acid instead of expensive chemical reagents contained Ti as raw material. The effect of doping materials and methods on the photo-degradation rate of methylene blue and dyes was studied. The characterizations of the doped TiO2 were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-visible absorption spectra (UV-vis). The results showed that this sample was the anatase TiO2 and contained elements C, N, S. The sample exhibited a significant response to ultraviolet and visible light. In the photo-degradation experiment, the C, N, S, tridoped-TiO2 could decolorize methylene blue and textile dyes quickly, and the photo-degradation rate of methylene blue could reach upward 98% after 3 hours under the different light sources.

Novel Ternary Metal Oxide Nanoparticles (La2Cu0.8Zn0.2O4) as Potential Photocatalyst for Visible Light Photocatalytic Degradation of Methylene Blue and Desulfurization of Dibenzothiophene

Nano Futures ◽  
2021 ◽  
Author(s):  
Molood Barmala ◽  
Mohammad Behnood
Keyword(s):  
Methylene Blue ◽  
Metal Oxide ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Desulfurization Rate ◽  
Ternary Metal ◽  
Photocatalytic Reactions ◽  
Visible Light Photocatalytic

Abstract In this work, we present preparation of novel ternary metal oxide nanoparticles, La2Cu0.8Zn0.2O4 (LCZO), using simple co-precipitation method. The crystalline structure, morphology and composition of the prepared LCZO nanoparticles were characterized by XRD, SEM and EDX analysis. The DRS investigation shows the LCZO nanoparticles have considerable light absorption in the visible light region. Also, the LCZO nanoparticles possess the band-gap energy of 2.82 eV. To investigate the visible light photocatalytic potential of the prepared LCZO nanoparticles, two photocatalytic reactions were conducted toward degradation of methylene blue (MB) solution and desulfurization of dibenzothiophene (DBT). In the presence of 3:1 molar ratio of H2O2/DBT, the high photocatalytic desulfurization rate (93.7%) of dibenzothiophene (DBT) was obtained over 0.2 gr of LCZO photocatalyst. In addition, the photocatalytic degradation rate of methylene blue (MB) solution was 91.4%. The mechanism involving both photocatalytic reactions were studied using different radical scavenging agents which showed that the hydroxyl radicals (OH•) are responsible for highly efficient desulfurization and degradation reactions. Moreover, reusability experiments reveal that the prepared LCZO photocatalyst has great stability and recyclability for both desulfurization of DBT and degradation of MB after 6 reaction cycles.

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