scholarly journals Fast decolorization of rhodamine-B dye using novel V2O5-rGO photocatalyst under solar irradiation

2022 ◽  
Vol 283 ◽  
pp. 116981
Author(s):  
Pankaj Singh Chauhan ◽  
Kuldeep Kumar ◽  
Kirtiman Singh ◽  
Shantanu Bhattacharya
Keyword(s):  
Rhodamine B ◽  
Solar Irradiation ◽  
Rhodamine B Dye

scholarly journals Construction of a CQDs/Ag3PO4/BiPO4 Heterostructure Photocatalyst with Enhanced Photocatalytic Degradation of Rhodamine B under Simulated Solar Irradiation

Micromachines ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 557 ◽  
Author(s):  
Huajing Gao ◽  
Chengxiang Zheng ◽  
Hua Yang ◽  
Xiaowei Niu ◽  
Shifa Wang
Keyword(s):  
Electron Microscopy ◽  
Rhodamine B ◽  
Photoelectron Spectroscopy ◽  
Fine Particles ◽  
Synthesis Method ◽  
Utilization Efficiency ◽  
Solar Irradiation ◽  
Diffraction Field ◽  
X Ray ◽  
Rhodamine B Dye

A carbon quantum dot (CQDs)/Ag3PO4/BiPO4 heterostructure photocatalyst was constructed by a simple hydrothermal synthesis method. The as-prepared CQDs/Ag3PO4/BiPO4 photocatalyst has been characterized in detail by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet–visible spectroscopy, and photoelectrochemical measurements. It is demonstrated that the CQDs/Ag3PO4/BiPO4 composite is constructed by assembling Ag3PO4 fine particles and CQDs on the surface of rice-like BiPO4 granules. The CQDs/Ag3PO4/BiPO4 heterostructure photocatalyst exhibits a higher photocatalytic activity for the degradation of the rhodamine B dye than that of Ag3PO4, BiPO4, and Ag3PO4/BiPO4. The synergistic effects of light absorption capacity, band edge position, separation, and utilization efficiency of photogenerated carriers play the key role for the enhanced photodegradation of the rhodamine B dye.

scholarly journals Self-Assembled Nanomaterials Based on Complementary Sn(IV) and Zn(II)-Porphyrins, and Their Photocatalytic Degradation for Rhodamine B Dye

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3598
Author(s):  
Nirmal K. Shee ◽  
Hee-Joon Kim
Keyword(s):  
Aqueous Solution ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Self Assembly ◽  
The Self ◽  
Assembly Process ◽  
Absorption Bands ◽  
Ligand Coordination ◽  
Rhodamine B Dye ◽  
Metal Ligand

A series of porphyrin triads (1–6), based on the reaction of trans-dihydroxo-[5,15-bis(3-pyridyl)-10,20-bis(phenyl)porphyrinato]tin(IV) (SnP) with six different phenoxy Zn(II)-porphyrins (ZnLn), was synthesized. The cooperative metal–ligand coordination of 3-pyridyl nitrogens in the SnP with the phenoxy Zn(II)-porphyrins, followed by the self-assembly process, leads to the formation of nanostructures. The red-shifts and remarkable broadening of the absorption bands in the UV–vis spectra for the triads in CHCl3 indicate that nanoaggregates may be produced in the self-assembly process of these triads. The emission intensities of the triads were also significantly reduced due to the aggregation. Microscopic analyses of the nanostructures of the triads reveal differences due to the different substituents on the axial Zn(II)-porphyrin moieties. All these nanomaterials exhibited efficient photocatalytic performances in the degradation of rhodamine B (RhB) dye under visible light irradiation, and the degradation efficiencies of RhB in aqueous solution were observed to be 72~95% within 4 h. In addition, the efficiency of the catalyst was not impaired, showing excellent recyclability even after being applied for the degradation of RhB in up to five cycles.

TRAPPING RHODAMINE B DYE USING FUNCTIONALISED MANGO ( Mangifera indica ) POD

2021 ◽  
Author(s):  
Olugbenga Solomon Bello ◽  
Kayode Adesina Adegoke ◽  
Adejumoke Abosede Inyinbor ◽  
Adewumi Oluwasogo Dada
Keyword(s):  
Rhodamine B ◽  
Mangifera Indica ◽  
Rhodamine B Dye

scholarly journals Debunking the Concept of Dentinal Tubule Penetration of Endodontic Sealers: Sealer Staining with Rhodamine B Fluorescent Dye Is an Inadequate Method

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3211
Author(s):  
David Donnermeyer ◽  
Sina Schmidt ◽  
Arno Rohrbach ◽  
Johannes Berlandi ◽  
Sebastian Bürklein ◽  
...  
Keyword(s):  
Penetration Depth ◽  
Rhodamine B ◽  
Root Canal ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Dentinal Tubule ◽  
Dentinal Tubules ◽  
Ah Plus ◽  
Root Dentin ◽  
Rhodamine B Dye

The aim of this study was to investigate the suitability of rhodamine B dye staining of an epoxy resin sealer (AH Plus) and calcium-silicate-based sealers (Total Fill BC Sealer, BioRoot RCS) to represent the penetration depth of the sealers into dentinal tubules after root canal obturation. In a three-step process, (1) leaching of rhodamine B from sealers into a buffer solution, (2) passive penetration of leached rhodamine B into dentinal tubules, and (3) conformity of rhodamine B penetration assessed by confocal laser scanning microscopy (CLSM), and sealer penetration assessed by scanning electron microscopy (SEM), in root-canal-filled teeth, were evaluated. Rhodamine B dye massively leached out of Total Fill BC Sealer and BioRoot RCS into the phosphate-buffered saline (PBS). A pinkish coloration of AH Plus was found after contact with PBS. Leached rhodamine B dye passively penetrated dentinal tubules from all three sealers when placed on root dentin. No correlation was observed between sealer penetration in SEM and rhodamine B penetration in CLSM. Staining of sealers using rhodamine B is an inadequate method with which to evaluate sealer penetration depth into dentinal tubules, as it overestimates the penetration of sealers into root dentin tubules.

scholarly journals Adsorptive removal of Rhodamine B dye from aqueous solution by using graphene–based nickel nanocomposite

Heliyon ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. e06851
Author(s):  
Usha Jinendra ◽  
Dinesh Bilehal ◽  
B.M. Nagabhushana ◽  
Avvaru Praveen Kumar
Keyword(s):  
Aqueous Solution ◽  
Rhodamine B ◽  
Adsorptive Removal ◽  
Rhodamine B Dye

Rapid Degradation of Rhodamine B over Cyclodextrin Modified TiO2

2011 ◽  
Vol 694 ◽  
pp. 764-768
Author(s):  
Xu Zhang ◽  
Nan Sheng Deng
Keyword(s):  
Electron Transfer ◽  
Excited States ◽  
Rhodamine B ◽  
Self Assembly ◽  
Initial Rate ◽  
Solar Irradiation ◽  
Pollutant Degradation ◽  
Rapid Degradation ◽  
Hybrid Nanomaterial ◽  
Simulated Solar Irradiation

A novel β-cyclodextrin (β-CD) grafted titanium dioxide (TiO2/β-CD) was synthesized through photo-induced self assembly methods, and its structure was characterized. The TiO2/β-CD hybrid nanomaterial showed high photoactivity under visible light irradiation (λ  400 nm and/or λ  420 nm) and simulated solar irradiation (λ  365 nm). Photodegradation of rhodamine B followed the Langmuir–Hinshelwood kinetics model. The initial rate R0 of rhodamine B degradation increased by 4.6, 2.4 and 1.5 times in the irradiation conditions of λ  420 nm, λ  400 nm and λ  365 nm, respectively. β-CD increased the lifetimes of the excited states of the unreactive guests and facilitated the electron transfer from the excited dye to the TiO2 conduction band, which enhanced the dye pollutant degradation.

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.

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