Plasmonic photocatalysis of concentrated industrial LASER dye: Rhodamine 6G

Majumder, Soma; Chatterjee, Somenath; Basnet, Parita; Mukherjee, Jaya

doi:10.1016/j.molliq.2022.119138

Cited by 11 publications

(4 citation statements)

References 71 publications

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“…To conclude this section, total organic carbon (TOC) experiments were performed on the AuNRs/PDA3 sample, and data points were collected every hour for a period of 3 h (Figure S15, Supporting Information), showing that the catalysts reached above 60% of Rh6G mineralization after 3 h, while no visible damage is observed in the nanoparticles. At similar tested concentrations, the mineralization efficiency is higher than other plasmonic nanomaterials toward Rh6G, [ 74 ] and another photocatalyst. [ 75 ]…”

Section: Resultsmentioning

confidence: 99%

Understanding the Photothermal and Photocatalytic Mechanism of Polydopamine Coated Gold Nanorods

Aguilar‐Ferrer

Vasileiadis

Iatsunskyi

et al. 2023

Adv Funct Materials

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Localized surface plasmon resonance (LSPRs) shown by gold nanorods (AuNRs) has several applications in photocatalysis, sensing, and biomedicine. The combination of AuNRs with Polydopamine (PDA) shells results in a strong photo‐thermal effect, making them appealing nanomaterials for biomedical applications. However, the precise roles and relative contributions of plasmonic effects in gold, and light‐to‐heat conversion in PDA are still debated. Herein, a hybrid nanoplatform made by an AuNR core surrounded by a polydopamine (PDA) shell is synthesized, and its photocatalytic behavior is studied. Synthesis is based on a seed‐mediated growth followed by the further self‐polymerization of dopamine hydrochloride (DA) on the surface of the AuNRs, and the effect of the thickness of the PDA shell on the plasmon response of the composite is the main examined parameter. Photocatalytic performance is tested toward Rhodamine 6G (Rh6G), with the nanocomposites achieving better performance than bare AuNRs and bare PDA nanoparticles. The degradation of 54% of Rh6G initial concentration is achieved within 60 min of irradiation with a catalyst concentration of 7.4 µg mL−1. Photodegradation kinetics, time‐resolved spectroscopy, and finite‐element‐method simulations of plasmons show that AuNRs plasmons, coupled with the low thermal conductivity of PDA, provide slow thermalization, while enhancing the charge carrier transfer.

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Section: Resultsmentioning

confidence: 99%

Understanding the Photothermal and Photocatalytic Mechanism of Polydopamine Coated Gold Nanorods

Aguilar‐Ferrer

Vasileiadis

Iatsunskyi

et al. 2023

Adv Funct Materials

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“…There was no The emission spectra of different concentrations of the fluorescent dye rhodamine B (RhB) are shown in Figure S1a. As the concentration of RhB increased, the fluorescence intensity increased and then weakened due to its characteristic aggregation-induced quenching (ACQ) [30,31]. Therefore, the MOFs with the advantage of a porous structure were introduced to prevent aggregation quenching, thereby synthesizing dye@MOFs [31,32].…”

Section: Characterization Of the Rhb@tb-mofs Fluorescent Probementioning

confidence: 99%

A Ratiometric Fluorescent Probe Based on RhB Functionalized Tb-MOFs for the Continuous Visual Detection of Fe3+ and AA

Jiang

Liu

et al. 2023

Molecules

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In this study, a red-green dual-emitting fluorescent composite (RhB@MOFs) was constructed by introducing the red-emitting organic fluorescent dye rhodamine B (RhB) into metal-organic frameworks (Tb-MOFs). The sample can be used as a ratiometric fluorescent probe, which not only avoids errors caused by instrument and environmental instability but also has multiple applications in detection. The results indicated that the RhB@MOFs exhibited a turned-off response toward Fe3+ and a turned-on response for the continuous detection of ascorbic acid (AA). This ratiometric fluorescent probe possessed high sensitivity and excellent selectivity in the continuous determination of Fe3+ and AA. It is worth mentioning that remarkable fluorescence change could be clearly observed by the naked eye under a UV lamp, which is more convenient in applications. In addition, the mechanisms of Fe3+- and AA-induced fluorescence quench and recovery are discussed in detail. This ratiometric probe displayed outstanding recognition of heavy metal ions and biomolecules, providing potential applications for water quality monitoring and biomolecule determination.

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“…When the pH values are below 9, there is an electrostatic interaction between the catalyst surface and the dye anion. Metal particles have strong adsorption under alkaline conditions [43]. MB is a cationic dye.…”

Section: Effect Of Solution Ph On Photocatalytic Degradation Of Methy...mentioning

confidence: 99%

Effects of Tb-Doped BiVO4 on Degradation of Methylene Blue

Chen

2023

Sustainability

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Bismuth vanadate (BiVO4) is a narrow-bandgap semiconductor (~2.41 Ev) that responds to visible light. The efficiency of degradation of organic dyes is indexed by methylene blue (MB). After 150 min, the efficiency of MB degradation by pure BiVO4 was about 20%. Its adsorption performance and electron–hole pair migration ability are weak, and the photocatalytic activity of pure BiVO4 needs to be improved. BiVO4 doped with rare earth ions can facilitate the separation of photogenerated electron–hole pairs, thereby enhancing photocatalytic activity in the visible light range. This study investigates changes in the structure and morphology of BiVO4 doped with different atomic percentages of terbium (Tb). BiVO4 powders were prepared by the hydrothermal method with different atomic percentages of Tb (at% = 0, 1, 3, and 5). Doping Tb benefits the coexistence of monoclinic/tetragonal heterostructures, which changes the band gap and improves degradation efficiency. After 150 min of visible light irradiation, the photocatalyst doped with 3 atomic percent of Tb exhibited 98.2% degradation of methylene blue. The degradation percentage of MB remained stable in the presence of 3at%Tb-doped BiVO4 composite. The optimal parameters for the amount of photocatalyst added were studied. Real-field simulations of metal ions and inorganic salts both retain high levels of degradation efficiency.

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Plasmonic photocatalysis of concentrated industrial LASER dye: Rhodamine 6G

Cited by 11 publications

References 71 publications

Understanding the Photothermal and Photocatalytic Mechanism of Polydopamine Coated Gold Nanorods

Understanding the Photothermal and Photocatalytic Mechanism of Polydopamine Coated Gold Nanorods

A Ratiometric Fluorescent Probe Based on RhB Functionalized Tb-MOFs for the Continuous Visual Detection of Fe3+ and AA

Effects of Tb-Doped BiVO4 on Degradation of Methylene Blue

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