scholarly journals Photocatalytic Degradation of Methyl Orange on Bi2O3 and Ag2O-Bi2O3 Nano Photocatalysts

2017 ◽  
Vol 12 (1) ◽  
pp. 96 ◽  
Author(s):  
Seyed Ali Hosseini ◽  
Ramin Saeedi
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Average Crystallite Size ◽  
Chemical Precipitation ◽  
Sem Analysis ◽  
Precipitation Method ◽  
Degradation Of Dyes ◽  
Initial Ph ◽  
Degradation Of Methyl Orange

<p>The photocatalytic activity of Bi<sub>2</sub>O<sub>3</sub> and Ag<sub>2</sub>O-Bi<sub>2</sub>O<sub>3</sub> was evaluated by degradation of aqueous methyl orange as a model dye effluent. Bi<sub>2</sub>O<sub>3</sub> was synthesized using chemical precipitation method. Structural analysis revealed that Bi<sub>2</sub>O<sub>3</sub> contain a unique well-crystallized phase and the average crystallite size of 22.4 nm. The SEM analysis showed that the size of Bi<sub>2</sub>O<sub>3</sub> particles was mainly in the range of 16-22 nm. The most important variables affecting the photocatalytic degradation of dyes, namely reaction time, initial pH and catalyst dosage were studied, and their optimal amounts were found at 60 min, 5.58 and 0.025 g, respectively. A good correlation was found between experimental and predicted responses, confirming the reliability of the model. Incorporation of Ag<sub>2</sub>O in the structure of composite caused decreasing band gap and its response to visible light. Because a high percentage of sunlight is visible light, hence Ag<sub>2</sub>O-Bi<sub>2</sub>O<sub>3</sub> nano-composite could be used as an efficient visible light driven photocatalyst for degradation of dye effluents by sunlight. Copyright © 2017 BCREC GROUP. All rights reserved</p><p><em>Received: 15<sup>th</sup> August 2016; Revised: 20<sup>th</sup> December 2016; Accepted: 21<sup>st</sup> December 2016</em></p><p><strong>How to Cite:</strong> Hosseini, S.A., Saeedi, R. (2017). Photocatalytic Degradation of Methyl Orange on Bi<sub>2</sub>O<sub>3</sub> and Ag<sub>2</sub>O-Bi<sub>2</sub>O<sub>3</sub> Nano Photocatalysts. <em>Bulletin of Chemical Reaction Engineering &amp; Catalysi</em>s, 12 (1): 96-105 (doi:10.9767/bcrec.12.1.623.96-105)</p><p><strong>Permalink/DOI:</strong> http://dx.doi.org/10.9767/bcrec.12.1.623.96-105</p><p> </p>

Enhanced visible light photocatalytic degradation of methyl orange by Bi2O3/F–TiO2composites

RSC Advances ◽  
2014 ◽  
Vol 4 (73) ◽  
pp. 38594 ◽  
Author(s):  
Junying Liu ◽  
Xinjuan Liu ◽  
Jinliang Li ◽  
Likun Pan ◽  
Zhuo Sun
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

scholarly journals Effect of Co-solvent on the Performance of LDHs Photocatalytic Degradation of Methyl Orange Solution

2021 ◽  
Author(s):  
Liang Huang ◽  
Xianghui Jin ◽  
xumei Tao ◽  
Chen Yang ◽  
Yuanyuan Han
Keyword(s):  
Methyl Orange ◽  
Ethylene Glycol ◽  
Photocatalytic Degradation ◽  
Hydrothermal Method ◽  
Photocatalytic Performance ◽  
Mixed Solvent ◽  
Volume Fraction ◽  
Precipitation Method ◽  
Co Precipitation ◽  
Degradation Of Methyl Orange

Abstract In this paper, NiAlCe hydrotalcite was prepared by co-precipitation method and hydrothermal method in different volume fractions of ethylene glycol-water mixed solvent and polyethylene glycol-water mixed solvent, and the effect of photocatalytic degradation of methyl orange under ultraviolet light was studied. Samples were characterized by XRD, XPS, UV-Vis and FT-IR in order to find the reasons for the improvement of photocatalytic performance under co-solvent system. NiAlCe-10%EG(h) and NiAlCe-15%PEG(h) had smaller particle size, which was beneficial to photocatalytic performance. The degradation rate of methyl orange could reach up to 100% in 42 min using NiAlCe hydrotalcite with 10% volume fraction of EG and in 48 min using NiAlCe hydrotalcite with 15% volume fraction of PEG. The photocatalytic effect of NiAlCe hydrotalcite samples prepared by hydrothermal method were better than that prepared by co-precipitation method. This provided a new type of catalyst for the degradation of dyes: preparing with ethylene glycol-water mixed solvent.

Dramatic visible light photocatalytic degradation due to the synergetic effects of TiO2 and PDA nanospheres

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64446-64449 ◽  
Author(s):  
Xiaosong Zhou ◽  
Bei Jin ◽  
Jin Luo ◽  
Xuyao Xu ◽  
Lingling Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Photocatalytic Activity ◽  
Synergetic Effects ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

Dramatic visible light photocatalytic activity was obtained for the degradation of methyl orange using TiO2 photocatalysts modified with polydopamine (PDA) nanospheres.

Construction of ZnxCd1−xS/CeO2 composites for enhanced photocatalytic activity and stability by chemical precipitation method

2021 ◽  
pp. 2150334
Author(s):  
Yi-Feng Chai ◽  
Zhong-Hua Zhu ◽  
Ming-Wei Liu ◽  
Jing Zeng ◽  
Gui-Fang Huang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Uv Light ◽  
Chemical Precipitation ◽  
Charge Carriers ◽  
Light Irradiation ◽  
Precipitation Method ◽  
Uv Light Irradiation

Development photoinduced photocatalysts is a significant approach to improve photocatalytic activity and stability. Herein, we successfully prepared Zn[Formula: see text]Cd[Formula: see text]S/CeO2 composites by a facile method. It is found that the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 composites show significant enhancement in photocatalytic activity for methyl orange (MO) degradation under visible and UV light irradiation. The degradation efficiency reaches up to 3.7 times higher than that of pure CeO2 under visible light irradiation. Moreover, the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 samples have almost no loss of photocatalytic activity after five recycles, indicating good photocatalytic stability of the samples. The attractive photocatalytic activity of the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 samples could be attributed to the robust charge carriers transfer and separation.

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