Preparation of CuO nanopowders and their catalytic activity in photodegradation of Rhodamine-B

2014 ◽  
Vol 25 (3) ◽  
pp. 1043-1052 ◽  
Author(s):  
Behrouz Shaabani ◽  
Ebrahim Alizadeh-Gheshlaghi ◽  
Yashar Azizian-Kalandaragh ◽  
Ali Khodayari
Keyword(s):  
Catalytic Activity ◽  
Rhodamine B ◽  
Cuo Nanopowders

Immobilization of Nano-TiO2 on Expanded Perlite for Photocatalytic Degradation of Rhodamine B

2011 ◽  
Vol 110-116 ◽  
pp. 3795-3800 ◽  
Author(s):  
Xiao Zhi Wang ◽  
Wei Wei Yong ◽  
Wei Qin Yin ◽  
Ke Feng ◽  
Rong Guo
Keyword(s):  
Catalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Kinetics ◽  
Irradiation Time ◽  
Sol Gel ◽  
Polluted Water ◽  
Order Kinetic ◽  
Expanded Perlite ◽  
Initial Concentration

Expanded perlite (EP) modified titanium dioxide (TiO2) with different loading times were prepared by Sol-Gel method. Photocatalytic degradation kinetics of Rhodamine B (RhB) in polluted water by the materials (EP-nanoTiO2), as well as the effects of different loading times and the initial concentration of RhB on photocatalysis rate were examined. The catalytic activity of the regenerated photocatalyst was also tested. The results showed that photocatalyst modified three times with TiO2had the highest catalytic activity. Degradation ratio of RhB by EP-nanoTiO2(modified three times) under irradiation for 6 h were 98.0%, 75.6% and 63.2% for 10 mg/L, 20 mg/L and 30 mg/L, respectively.The photocatalyst activity has little change after the five times recycling, and the degradation rate of RhB decreased less than 8%. The reaction of photocatalysis for RhB with irradiation time can be expressed as first-order kinetic mode within the initial concentration range of RhB between 10mg/L and 30 mg/L. EP-nanoTiO2photocatalyst has a higher activity and stability to degrade RhB in aqueous solution.

scholarly journals Palladium-Supported Zirconia-Based Catalytic Degradation of Rhodamine-B Dye from Wastewater

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1522
Author(s):  
Salma Jabeen ◽  
Muhammad Sufaid Khan ◽  
Rozina Khattak ◽  
Ivar Zekker ◽  
Juris Burlakovs ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rhodamine B ◽  
Dye Degradation ◽  
Freundlich Isotherm ◽  
Impregnation Method ◽  
K Value ◽  
First Order Kinetics ◽  
Good Catalytic Activity ◽  
Rhodamine B Dye ◽  
Best Fit

The catalytic activity of Pd/ZrO2 was studied in terms of the degradation of rhodamine-B dye in the presence of hydrogen peroxide. Pd/ZrO2 was prepared by impregnation method, calcined at 750 °C and characterized by XRD, SEM and EDX. The catalyst showed good catalytic activity for dye degradation at 333 K, using 0.05 g of the catalyst during 5 h. The reaction kinetics followed the pseudo-first order kinetics. The Freundlich, Langmuir and Temkin isotherms were applied to the data and the best fit was obtained with Freundlich isotherm. Thermodynamic parameters, like ΔH, ΔG and ΔS were also calculated. The negative values of ΔH (−291.406 KJ/mol) and Gibbs free energy (ΔG) showed the exothermic and spontaneous nature of the process. The positive ΔS (0.04832 KJ/mol K) value showed suitable affinity of catalyst for dye degradation. The catalyst was very stable, active and was easily separated from the reaction mixture by filtration. It can be concluded from the results that the prepared catalyst could be effectively used in dyes degradation/removal from water subjected to further validation and use for various dyes.

Surfactant-assisted synthesis of ceria–titania-rich mesoporous silica materials and their catalytic activity towards photodegradation of organic dyes

2017 ◽  
Vol 46 (29) ◽  
pp. 9577-9590 ◽  
Author(s):  
Nabanita Pal ◽  
Indrani Mukherjee ◽  
Sriparna Chatterjee ◽  
Eun-Bum Cho
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Visible Light ◽  
Rhodamine B ◽  
Organic Dyes ◽  
Pivotal Role ◽  
Silica Materials ◽  
Mesoporous Silica Materials ◽  
Surfactant Assisted

A series of Ce–Ti-doped mesoporous silica materials have been prepared under basic conditions. The materials played a pivotal role in visible-light-induced degradation of toxic Rhodamine B.

scholarly journals Preparation of FeOOH/Cu with High Catalytic Activity for Degradation of Organic Dyes

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 338 ◽  
Author(s):  
Yingzhe Zhang ◽  
Junfeng Liu ◽  
Ding Chen ◽  
Qingdong Qin ◽  
Yujiao Wu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ball Milling ◽  
Rhodamine B ◽  
High Frequency ◽  
Organic Dyes ◽  
Raw Materials ◽  
High Catalytic Activity ◽  
Phenol Red ◽  
Cu Catalyst ◽  
High Frequency Electromagnetic Field

In this study, high-frequency electromagnetic-assisted ball-milling was used to prepare FeOOH/Cu catalyst. The combined effect of the high-frequency electromagnetic field and ball-milling resulted in the complete conversion of raw materials into FeOOH/Cu nanomagnetic hybrid at ~40 °C in only 30 h. Experiments showed that Rhodamine B was completely degraded within only 3 min, which was much faster than with previously reported catalysts. The combination effect of ball milling and microwave afforded excellent catalytic activity. Furthermore, the produced catalyst could be recovered easily using an external magnetic field for reuse. The influence of pH on the catalytic activity for degrading Rhodamine B, Phenol Red, Methyl Orange, and Methylene Blue were also investigated; Rhodamine B was completely degraded at pH 9 within only 2 min.

Visible light photo-catalytic activity of C-PVA/TiO2 composites for degrading rhodamine B

2015 ◽  
Vol 324 ◽  
pp. 645-651 ◽  
Author(s):  
Haigang Yang ◽  
Jianling Zhang ◽  
Yuanqing Song ◽  
Shoubin Xu ◽  
Long Jiang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Rhodamine B ◽  
Photo Catalytic Activity

Influence of Zn content on heterogeneous photo-Fenton catalytic performance of Zn-doped Fe3O4 for degradation of rhodamine B

2019 ◽  
Vol 12 (01) ◽  
pp. 1850092 ◽  
Author(s):  
Huoshi Cen ◽  
Zhaodong Nan
Keyword(s):  
Catalytic Activity ◽  
Zeta Potential ◽  
Rhodamine B ◽  
Catalytic Performance ◽  
Molar Ratio ◽  
Content Increase ◽  
Fenton Process ◽  
Decolorization Efficiency ◽  
Zn Content ◽  
Negative Zeta Potential

Zn-doped Fe3O4 has been employed as a catalyst for the photo-Fenton process. At the present study, the influence of Zn content in the Zn-doped Fe3O4 on the catalytic activity for the photo-Fenton process was studied. Monodispersed ZnxFe[Formula: see text]O4 particles were facilely synthesized with higher surface area and several nm of diameter, where [Formula: see text], 0.4 and 1.0. Rhodamine B (Rh B), as one of the positive dyes, was selected as a model pollutant. The decolorization efficiency of the Fe3O4 ([Formula: see text]) for Rh B reached about 90% in 120[Formula: see text]min under visible light. The Zn content increase in the Zn-doped Fe3O4 inhibited the Fenton process. The higher molar ratio of Fe[Formula: see text] to Fe[Formula: see text], smaller band-gap, and more negative zeta potential of the Fe3O4 induced the most excellent photo-Fenton performance for the Rh B degradation.

Study on the Preparation of Nano Fe3O4 Powder and its Properties

2012 ◽  
Vol 178-181 ◽  
pp. 562-565
Author(s):  
Rui Cui Liu ◽  
Fu Yi Jiang ◽  
Zi Quan Liu
Keyword(s):  
Catalytic Activity ◽  
Rhodamine B ◽  
Catalytic Degradation ◽  
Model Reaction ◽  
Iron Chloride ◽  
Precipitation Method ◽  
Photo Catalytic Activity ◽  
Powder Samples ◽  
Nano Fe3o4 ◽  
Co Precipitation

The experiment used iron chloride, iron dichloride and other agents as the main resources to prepare the nano Fe3O4 powder by co-precipitation method. Magnets were used to test the magnetism of the prepared nano Fe3O4 powder samples. And the photo-catalytic degradation of rhodamine B solution was used as the model reaction to test the photo-catalytic activity of the prepared nano Fe3O4 powder. The results showed that the prepared nano Fe3O4 powder samples had good magnetism but low photo-catalytic activity.

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