Facile synthesis of highly efficient Co@ZnSQDs/g-C3N4/MWCNT nanocomposites and their photocatalytic potential for the degradation of RhB dye: Efficiency, degradation kinetics, and mechanism pathway

Danish, Mohtaram; Muneer, M.

doi:10.1016/j.ceramint.2021.01.168

Cited by 40 publications

(11 citation statements)

References 96 publications

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“…C t represents the final concentration in the solution of the organic dye (mg L −1 ), k is the pseudo-first-order rate constant, and t is irradiation time, respectively [ 74 ].…”

Section: Resultsmentioning

confidence: 99%

π-Electron-Extended Triazine-Based Covalent Organic Framework as Photocatalyst for Organic Pollution Degradation and H2 Production from Water

et al. 2023

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Herein, we report the efficient preparation of π-electron-extended triazine-based covalent organic framework (TFP-TPTPh COF) for photocatalysis and adsorption of the rhodamine B (RhB) dye molecule, as well as for photocatalytic hydrogen generation from water. The resultant TFP-TPTPh COF exhibited remarkable porosity, excellent crystallinity, high surface area of 724 m2 g−1, and massive thermal stability with a char yield of 63.41%. The TFP-TPTPh COF demonstrated an excellent removal efficiency of RhB from water in 60 min when used as an adsorbent, and its maximum adsorption capacity (Qm) of 480 mg g−1 is among the highest Qm values for porous polymers ever to be recorded. In addition, the TFP-TPTPh COF showed a remarkable photocatalytic degradation of RhB dye molecules with a reaction rate constant of 4.1 × 10−2 min−1 and an efficiency of 97.02% under ultraviolet–visible light irradiation. Furthermore, without additional co-catalysts, the TFP-TPTPh COF displayed an excellent photocatalytic capacity for reducing water to generate H2 with a hydrogen evolution rate (HER) of 2712 μmol g−1 h−1. This highly active COF-based photocatalyst appears to be a useful material for dye removal from water, as well as solar energy processing and conversion.

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“…C t represents the final concentration in the solution of the organic dye (mg L −1 ), k is the pseudo-first-order rate constant, and t is irradiation time, respectively [ 74 ].…”

Section: Resultsmentioning

confidence: 99%

π-Electron-Extended Triazine-Based Covalent Organic Framework as Photocatalyst for Organic Pollution Degradation and H2 Production from Water

et al. 2023

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“…At the same time, the holes created in the VB of AgI transferred to the VB of CdS, where it directly reacted with the pollutants. Since the redox potential of CdS (+1.65) is less positive than the • OH/OH – potential (+2.38 eV vs NHE) and the H 2 O/ • OH (+2.72 eV vs NHE), the holes are unable to convert the OH – and H 2 O into • OH. , The following reactions can be given as a concise summary of all of the processes that are involved in degradation pathways (eqs –) CdS / AgI + italichv → CdS / AgI false( normale − + normalh + false) normalO 2 + normale − → normalO 2 • − MO + normalO 2 • − , 0.25em normalh + → d egradation products TC + normalO 2 • − , 0.25em normalh + → d egradation products …”

Section: Resultsmentioning

confidence: 99%

Novel Type-II Heterojunction Binary Composite (CdS/AgI) with Outstanding Visible Light-Driven Photocatalytic Performances toward Methyl Orange and Tetracycline Hydrochloride

et al. 2023

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In this study, an effective type-II heterojunction CdS/AgI binary composite was constructed by an in situ precipitation approach. To validate the successful formation of heterojunction between AgI and CdS photocatalysts, the synthesized binary composites were characterized by various analytical techniques. UV−vis diffuse-reflectance spectroscopy (UV−vis DRS) revealed that heterojunction formation led to a red shift in the absorbance spectra of the CdS/AgI binary composite. The optimized 20AgI/CdS binary composite showed a least intense photoluminescence (PL) peak indicating highly improved charge carrier (e − /h + pairs) separation efficiency. The photocatalytic efficiency of the synthesized materials was assessed based on the degradation of methyl orange (MO) and tetracycline hydrochloride (TCH) in the presence of visible light. Compared to bare photocatalysts and other binary composites, the 20AgI/CdS binary composite showed the highest photocatalytic degradation performances. Additionally, the trapping studies showed that superoxide radical anion (O 2•− ) was the most dominant active species involved in photodegradation processes. Based on the results of active species trapping studies, a mechanism was proposed to describe the formation of type-II heterojunctions for CdS/AgI binary composite. Overall, the synthesized binary composite has tremendous promise for environmental remediation due to its straightforward synthesis approach and excellent photocatalytic efficacy.

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“…In contrast, [AgO 6 ]˙ clusters in the VB, which can act as h˙, can oxidize RhB directly 98–100 (see reaction (2)). [AgO 6 ]˙ + RhB → degraded products…”

Section: Resultsmentioning

confidence: 99%

Towards a relationship between photoluminescence emissions and photocatalytic activity of Ag₂SeO₄: combining experimental data and theoretical insights

et al. 2022

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Facile synthesis of highly efficient Co@ZnSQDs/g-C3N4/MWCNT nanocomposites and their photocatalytic potential for the degradation of RhB dye: Efficiency, degradation kinetics, and mechanism pathway

Cited by 40 publications

References 96 publications

π-Electron-Extended Triazine-Based Covalent Organic Framework as Photocatalyst for Organic Pollution Degradation and H2 Production from Water

π-Electron-Extended Triazine-Based Covalent Organic Framework as Photocatalyst for Organic Pollution Degradation and H2 Production from Water

Novel Type-II Heterojunction Binary Composite (CdS/AgI) with Outstanding Visible Light-Driven Photocatalytic Performances toward Methyl Orange and Tetracycline Hydrochloride

Towards a relationship between photoluminescence emissions and photocatalytic activity of Ag₂SeO₄: combining experimental data and theoretical insights

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Facile synthesis of highly efficient Co@ZnSQDs/g-C3N4/MWCNT nanocomposites and their photocatalytic potential for the degradation of RhB dye: Efficiency, degradation kinetics, and mechanism pathway

Cited by 40 publications

References 96 publications

π-Electron-Extended Triazine-Based Covalent Organic Framework as Photocatalyst for Organic Pollution Degradation and H2 Production from Water

π-Electron-Extended Triazine-Based Covalent Organic Framework as Photocatalyst for Organic Pollution Degradation and H2 Production from Water

Novel Type-II Heterojunction Binary Composite (CdS/AgI) with Outstanding Visible Light-Driven Photocatalytic Performances toward Methyl Orange and Tetracycline Hydrochloride

Towards a relationship between photoluminescence emissions and photocatalytic activity of Ag2SeO4: combining experimental data and theoretical insights

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Towards a relationship between photoluminescence emissions and photocatalytic activity of Ag₂SeO₄: combining experimental data and theoretical insights