Spinach-derived boron-doped g-C3N4/TiO2 composites for efficient photo-degradation of methylene blue dye

Faryad, Sadia; Azhar, Umair; Tahir, Muhammad Bilal; Ali, Wahid; Arif, Muhammad; Sagir, Muhammad

doi:10.1016/j.chemosphere.2023.138002

Cited by 38 publications

(6 citation statements)

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“…The kinetics of photocatalytic activity processes using bare and Ce-doped MoO 3 catalysts is consistent with pseudo-first-order reactions, as measured by Equation ( 4). [59][60][61] Figure 7b displays the linearly fitted kinetic curve of ln (C/C o ) versus time for each sample. Ce-doped MoO 3 catalysts were shown to exhibit higher rate constants than pure MoO 3 , indicating that the rate-determining step occurs more quickly in the presence of Ce.…”

Section: Photocatalytic Studiesmentioning

confidence: 99%

Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

Farid¹,

Aman

Ahmad

et al. 2023

Energy Tech

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Wastewater treatment and management have been hot topics for the past three decades. Water reuse can help to alleviate the problems of water shortage and wastewater treatment in practice. Water can be used for household uses once the organic contaminants are removed. In this research, bare MoO3 and Ce‐doped MoO3 are fabricated using a straightforward hydrothermal method for wastewater treatment. The different analytical techniques are utilized to study the physiochemical features of all the synthesized products. Rhodamine B (RhB) is reduced photocatalytically under exposure of visible light to ascertain the possible capacity. The photocatalytic results suggest that the photoreduction of RhB with 2% Ce‐doped MoO3 exhibits a greater photocatalytic activity of 91.83% than the pure and other doped materials. The kinetic study of 2% Ce‐doped MoO3 displays the greater rate constant of 0.0163 min−1 and a lower Rct value of 0.95 Ω. The research indicates that the doping approach is a very effective way to decrease the bandgap and boost RhB's photocatalytic reduction. Other environmental and water‐related problems can be solved using Ce‐doped MoO3's improved physical and structural characteristics.

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Section: Photocatalytic Studiesmentioning

confidence: 99%

Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

Farid¹,

Aman

Ahmad

et al. 2023

Energy Tech

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“…The role of pH in the photodegradation of organic pollutants, particularly in the removal of MB, is widely recognized as it significantly affects the production of hydroxyl radicals. To investigate this, the photodegradation of MB was carried out under visible light irradiation using CuWO4/g-C3N4 as a catalyst over a range of pH values (3)(4)(5)(6)(7)(8)(9). The impact of pH on the photodegradation of MB is presented in Figure 9.…”

Section: Photodegradation Of Mbmentioning

confidence: 99%

“…Visible light-driven semiconductors are particularly valuable due to their ability to utilize sunlight from the solar spectrum, facilitated by their low energy band gaps. Among them, g-C3N4, a polymeric semiconductor, has attracted increasing interest since the discovery of its ability to produce hydrogen through photocatalysis in 2009 [7][8][9]. Although g-C3N4 has a moderate energy band gap (∼ 2.7 eV) that allows it to absorb visible light effectively, its valence band potential (VBP) exhibits limited oxidation ability, leading to the fast recombination of electrons and holes, which hinders its practical applications.…”

Section: Introduction *mentioning

confidence: 99%

“…Although g-C3N4 has a moderate energy band gap (∼ 2.7 eV) that allows it to absorb visible light effectively, its valence band potential (VBP) exhibits limited oxidation ability, leading to the fast recombination of electrons and holes, which hinders its practical applications. Therefore, there is a strong motivation to develop suitable modifications to enhance the photocatalytic efficiency of g-C3N4 [7][8][9].…”

Section: Introduction *mentioning

confidence: 99%

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A Novel Heterojunction CuWO4/g-C3N4 Photocatalyst for Removal of Organic Pollutant under Visible Light Irradiation

Dang

Nguyen

2023

NST

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In this study, a series of CuWO4/g-C3N4 composites were synthesized using a facile construction method. The structural characteristics of the composites were examined using various techniques, including XRD, SEM, SEM-EDS, FT-IR, and UV–DRS. The photocatalytic performance of the CuWO4/g-C3N4 nanocomposites was evaluated in the degradation of methylene blue (MB) under visible light irradiation. The findings revealed that the CuWO4/g-C3N4 composite with a mass ratio of 10% CuWO4 displayed the highest efficiency (89%) in degrading MB during an 80-minute photodegradation process, which was consistent with the pseudo-first-order kinetics. These results clearly demonstrate that the formation of a Z-scheme CuWO4/g-C3N4 heterojunction significantly improves the photocatalytic efficiency by promoting rapid separation of electron-hole pairs and enhancing the redox capability. Additionally, the photodegradation efficiency remained above 85% even after four cycles, suggesting the stability of the catalyst.

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“…MB is a cationic dye with highly water-soluble properties, forming a stable solution with water at room temperature [2,8]. As a result, MB is commonly used as colorant for plastic, cotton, wool, leather, and silk [11][12][13]. Additionally, MB solution is reportedly toxic, carcinogenic, and nonbiodegradable, endangering human health and negatively impacting the environment [11,12].…”

Section: Introductionmentioning

confidence: 99%

Designing A Visible Light Driven TiO2-Based Photocatalyst by Doping and Co-Doping with Niobium (Nb) and Boron (B)

Yeoh,

Chan,

Pung

et al. 2024

Bull. Chem. React. Eng. Catal.

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Water pollution has emerged as a significant worldwide issue, with organic pollutants being a key contributor. Titanium dioxide (TiO2) has demonstrated promising photocatalytic performance in removing organic pollutants under ultraviolet (UV) irradiation. However, the wide band gap (3.2 eV) of TiO2 results in low absorption capacity of visible light, hindering its overall efficiency in degrading organic pollutants. To address the limitation, this research aimed to synthesize visible light-driven TiO2 photocatalyst with different polymorphs (anatase and rutile) and investigate the effect of various doping combination (Nb, B and Nb,B) and concentrations (0.25, 0.50, 0.75 and 1.00 mol%) on the photodegradation efficiency towards methylene blue (MB) dye solution. Anatase phase was obtained when TiO2-based nanopowders were calcined at 400 °C, while the rutile phase was formed at 900 °C based on XRD analyses. Additionally, the morphology analyses revealed that the particle size of anatase is much smaller than that of rutile. The presence of dopants further reduced the particle size of both anatase and rutile phases. Based on UV-Vis absorbance spectra analyses, the anatase Nb,B-TiO2 with 0.50 mol% of dopant concentration exhibited the best photocatalytic performance towards MB. Moreover, the anatse phase of 0.50 mol% Nb,B-TiO2 showed the narrowest band gap of 2.74 eV compared to the TiO2 (3.4 eV), representing a reduction of 19.41 %, according to UV-Vis analyses. These outcomes suggest the potential application of anatase phase of 0.50 mol% Nb,B-TiO2 in treating organic pollutants in wastewater under visible light conditions in future. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Spinach-derived boron-doped g-C3N4/TiO2 composites for efficient photo-degradation of methylene blue dye

Cited by 38 publications

References 34 publications

Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

A Novel Heterojunction CuWO4/g-C3N4 Photocatalyst for Removal of Organic Pollutant under Visible Light Irradiation

Designing A Visible Light Driven TiO2-Based Photocatalyst by Doping and Co-Doping with Niobium (Nb) and Boron (B)

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Spinach-derived boron-doped g-C3N4/TiO2 composites for efficient photo-degradation of methylene blue dye

Cited by 38 publications

References 34 publications

Ce‐Doped MoO3 Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

Ce‐Doped MoO3 Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

A Novel Heterojunction CuWO4/g-C3N4 Photocatalyst for Removal of Organic Pollutant under Visible Light Irradiation

Designing A Visible Light Driven TiO2-Based Photocatalyst by Doping and Co-Doping with Niobium (Nb) and Boron (B)

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Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater

Ce‐Doped MoO₃ Photocatalyst as an Environmental Purifier for Removal of Noxious Rhodamine B Organic Pollutant in Wastewater