scholarly journals Electrochemical Oxidation of Rhodamine B: Optimization and Degradation Mechanism

2017 ◽  
pp. 4265-4276 ◽  
Author(s):  
Qizhou Dai ◽  
Keyword(s):  
Electrochemical Oxidation ◽  
Rhodamine B ◽  
Degradation Mechanism

Decolourization of Rhodamine B from aqueous solution by electrochemical oxidation using graphite electrodes

2015 ◽  
pp. 1-7 ◽  
Author(s):  
R. Rathinam ◽  
M. Govindaraj ◽  
K. Vijayakumar ◽  
S. Pattabhi
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Oxidation ◽  
Rhodamine B ◽  
Graphite Electrodes

scholarly journals Preparation of Ti/SnO2-Sb/Rare Earth Electrodes Containing Different Contents of Ni Intermediate Layer for Efficient Electrochemical Decolorization of Rhodamine B

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Thet Phyo Wai ◽  
Yilin Yin ◽  
Xiao Zhang ◽  
Zenghe Li
Keyword(s):  
Rare Earth ◽  
Electrochemical Oxidation ◽  
Rhodamine B ◽  
Intermediate Layer ◽  
Accelerated Life Testing ◽  
Composite Electrodes ◽  
Molar Ratios ◽  
Decolorization Rate ◽  
Accelerated Life

Water contamination by dyes discharged from many industries is an environmental issue of great matter. Electrochemical oxidation is an advanced approach for wastewater treatment. In this study, the composite electrodes of Ti/SnO2-Sb-Ni/rare earth have been modified using rare earth elements (Re) Gd, Ce, Eu, and Er and various molar ratios of tin and nickel intermediate layer, and their electrochemical oxidation effects were scrutinized. To analyze the decolorization performance of the electrodes, Rhodamine B (RhB) dye was utilized as a target pollutant. Accelerated life testing indicated that the longer service life could be observed in Ni (3.5%)/Re and Ni (5%)/ Re electrodes compared with other modified Ni (0%, 1%, and 2%)/Re electrodes. Compared with the color removal efficiencies of the Ni (2%)/Re electrodes, the decolorization rate of 90% after treatment for 60 min and the low energy consumption of 3.621 kW h·m−3 can be achieved at the Ni (2%)/Gd electrode under the experimental condition of 100 mg·L−1 RhB. The best decolorization rate was observed at the Ni (2%)/Re electrodes among other Ni and no adding Ni-doped Re electrodes. The characterization of the electrodes was described, consisting of surface morphology, oxygen evolution potential, and a crystallographic and elemental combination of the coatings.

Synthesis of a novel Type-II In2S3/Bi2MoO6 heterojunction photocatalyst: Excellent photocatalytic performance and degradation mechanism for Rhodamine B

2021 ◽  
Vol 255 ◽  
pp. 117758
Author(s):  
Hao Cui ◽  
Sheying Dong ◽  
Kangkang Wang ◽  
Mingsha Luan ◽  
Tinglin Huang
Keyword(s):  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Degradation Mechanism ◽  
Type Ii

Hydrophobic networked PbO2 electrode for electrochemical oxidation of paracetamol drug and degradation mechanism kinetics

Chemosphere ◽  
2018 ◽  
Vol 193 ◽  
pp. 89-99 ◽  
Author(s):  
Yapeng He ◽  
Xue Wang ◽  
Weimin Huang ◽  
Rongling Chen ◽  
Wenli Zhang ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Degradation Mechanism ◽  
Pbo2 Electrode

scholarly journals Phase Transformation, Photocatalytic and Photoluminescent Properties of BiPO4 Catalysts Prepared by Solid-State Reaction: Degradation of Rhodamine B

Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1007
Author(s):  
Abdessalam Bouddouch ◽  
Elhassan Amaterz ◽  
Bahcine Bakiz ◽  
Aziz Taoufyq ◽  
Frédéric Guinneton ◽  
...  
Keyword(s):  
Solid State ◽  
Rhodamine B ◽  
Solid State Reaction ◽  
Uv Light ◽  
Morphological Changes ◽  
Degradation Mechanism ◽  
Light Irradiation ◽  
Temperature Phase ◽  
X Ray ◽  
Uv Light Irradiation

Polycrystalline bismuth phosphate BiPO4 was synthesized by solid-state reaction at different temperatures varying from 500 to 900 °C. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDS) and Raman spectroscopy. The low-temperature phase of BiPO4 has monoclinic structure with a space group P21/n, and was transformed into the monoclinic phase P21/m with a slight distortion of monoclinic lattice when it was heated above 500 °C. The effect of the transformation on the structure, morphology and photocatalytic properties was examined. The photocatalytic activity of each sample, in presence of Rhodamine B (RhB) in aqueous solution, was carried out and analyzed under UV light irradiation. Photoexperiments showed that the material prepared at 500 °C is the best catalyst with degradation efficiency of the order of 96% after 12 min of reaction time under UV light irradiation. This high photocatalytic efficiency could be due to their structural and morphological changes. The photocatalytic degradation mechanism of RhB in the presence of the best photocatalyst BiP-500 °C is proposed. The stability of the catalyst was also examined by carrying out four successive tests of the degradation in the presence of BiP-500 °C. Total organic carbon (TOC) was used to further estimate the rate of mineralization in the presence of BiP-500 °C (83% TOC removal). Photoluminescence experiments performed under UV-laser light irradiation revealed emissions in the green-orange range, with optimal intensities for the mix systems observed at 550 °C.

scholarly journals De-Ethylation and Cleavage of Rhodamine B by a Zirconium Phosphate/Silver Bromide Composite Photocatalyst

Catalysts ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 3 ◽  
Author(s):  
Monica Pica ◽  
Silvia Calzuola ◽  
Anna Donnadio ◽  
Pier Gentili ◽  
Morena Nocchetti ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Zirconium Phosphate ◽  
Degradation Mechanism ◽  
Silver Bromide ◽  
Catalytic Systems ◽  
Composite Photocatalyst

A composite heterogeneous photocatalyst based on silver bromide was prepared by a reaction of silver exchanged zirconium phosphate (ZrP) and HBr. The ZrP/AgBr composite containing 53 wt% AgBr was tested in the photocatalytic degradation of Rhodamine B (RhB) and exhibited higher catalytic activity with respect to pure AgBr. As a matter of fact, the time needed to achieve a percentage of chromophore cleavage of about 90% was 3 min for the composite versus the 30 min needed for pure AgBr. The ZrP/AgBr composite turned out to be stable for at least three consecutive cycles. The UV-Vis spectra of the RhB solution, recorded at different irradiation times, were also decomposed and the concentration of the species formed by de-ethylation and cleavage processes during photocatalysis were calculated; the data obtained for the AgBr-based catalysis were also compared with those for the AgCl-based catalysis, and the degradation mechanism was suggested for both catalytic systems.

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