Photocatalytic degradation of methyl blue in water using sawdust-derived cellulose nanocrystals-metal oxide nanocomposite

Oyewo, Opeyemi A.; Nevondo, Ngudo G.; Onwudiwe, Damian C.

doi:10.1007/s10904-020-01847-5

Cited by 20 publications

(3 citation statements)

References 56 publications

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“…Furthermore, because impurities and defect levels accumulate in the forbidden band, the inclusion of ZnO causes a reduction in bandgap energy. [ 41 ] Furthermore, this led to a decrease in the rate of recombination of the charge carriers, suggesting that more electrons and holes would be available to break down the MB molecules and boost the photocatalytic effectiveness of the nanocomposites. When the nanocomposite was present, surface reactions caused the MB to become decolored.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites

Mane,

Dake,

Raskar

et al. 2024

Physica Status Solidi (a)

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Herein, the successful synthesis of ZnO/Fe‐doped Bi2O3 nanocomposite through a microwave‐assisted coprecipitation method is reported. The fabricated materials are comprehensively characterized using X‐ray diffraction, field‐emission scanning electron microscopy, energy dispersive X‐ray analysis, UV–vis, vibrating sample magnetometer, and photoluminescence techniques. The results of the investigation unveil a reduction in crystalline size, a low bandgap of 1.7 eV, and notable improvements in magnetization and surface area (50.63 m2 g−1) upon the incorporation of ZnO and Fe doping into Bi2O3. Remarkably, the ZnO/5% Fe‐doped Bi2O3 composite demonstrates 86.34% degradation of methylene blue (MB) dye within 60 min. Furthermore, this composite exhibits significant antifungal activity, as evidenced by a zone of inhibition diameter of 20 mm against Aspergillus flavus. Ongoing studies are investigating the impact of pH, inorganic ions, scavenger mechanisms, and MB degradation. These findings underscore the synergistic effects of ZnO and Fe, which enhance the absorption of photons that decrease the recombination rate and increase the charge transfer of Bi2O3, contributing to the improved material properties of the ZnO/5% Fe‐doped Bi2O3 composite. This study paves the way for further exploration of the multifunctional properties of ZnO/Fe‐doped Bi2O3 nanocomposites in diverse environmental and biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites

Mane,

Dake,

Raskar

et al. 2024

Physica Status Solidi (a)

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“…Onyango and research group [288] demonstrated a probable mechanism was proposed photocatalytic decomposition of methylene blue using CNC‐ZnO/TiO 2 nanocomposite. shows that the enhanced activity in the photo‐enhanced degradation of MB could be attributed to the improved separation efficiency of charge carriers due to the charge transfer between ZnO and TiO 2 .…”

Section: General Photocatalytic Mechanisms Phenomenonmentioning

confidence: 99%

“…Subsequently, the effectively separated e À and h + pairs would quickly migrate to the surface of the composite material, where they would react with O 2 and H 2 O to form * O 2 À and * OH and further react with the reactants. Onyango and research group [288] demonstrated a probable mechanism was proposed photocatalytic decomposition of methylene blue using CNC-ZnO/TiO 2 nanocomposite. shows that the enhanced activity in the photo-enhanced degradation of MB could be attributed to the improved separation efficiency of charge carriers due to the charge transfer between ZnO and TiO 2 .…”

Section: Photocatalytic Mechanism Of Br/bi 2 Wo 6 For Degradation Rho...mentioning

confidence: 99%

Review On Strategies For the Design and Synthesis of Flower‐Like Bi₂WO₆ and BiOX (X=F, Cl, Br, I) Composites for Photocatalytic Environmental Remediation

Deshmukh,

Suresh,

Bhuse

et al. 2024

ChemistrySelect

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In latest events, water pollution has posed an immense threat, and its sustainable treatment is a topic of concern. Among myriad of water treatment, research community has lensed towards sustainable heterogeneous photocatalysis especially, inorganic semiconductors. Bismuth tungstate a pristine Aurivillius compound with unique crystal structure, exceptional photochemical stability, and strong redox abilities but minimum visible light absorption and quick carrier recombination are its caveats, these caveats are circumvented by synthesizing BiOX (X=F, Cl, Br and I) composites with surface modifiers, doping with hetero atoms (metals and non‐metals), construction of the heterojunction and amalgamation of carbon materials. The heart of this review is strategic engineering of flower‐like morphology photocatalyst synthesis and optical properties, it also discusses the charge transfer kinetics, photocatalytic performance, and durability. The flower‐like morphology highlighted in this review is due to its ability to harvest light, providing larger specific surface area which introduces more active sites and efficient excitons generation. The comprehensive tabulated data in this review will help the actively engaged research community in Bismuth heterogenous photocatalysis. It also sheds light on the future view of environmental remediation via photocatalytic developments.

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Cellulose Nanocrystal as a New Promising Candidate in Textile Wastewater Treatment

Venkatanarasimhan

Dheenadayalan

Palanisamy

2022

Sustainable Textiles: Production, Processing, Manufacturing &Amp; Chemistry

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Photocatalytic degradation of methyl blue in water using sawdust-derived cellulose nanocrystals-metal oxide nanocomposite

Cited by 20 publications

References 56 publications

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites

Review On Strategies For the Design and Synthesis of Flower‐Like Bi₂WO₆ and BiOX (X=F, Cl, Br, I) Composites for Photocatalytic Environmental Remediation

Cellulose Nanocrystal as a New Promising Candidate in Textile Wastewater Treatment

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Photocatalytic degradation of methyl blue in water using sawdust-derived cellulose nanocrystals-metal oxide nanocomposite

Cited by 20 publications

References 56 publications

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi2O3 Nanocomposites

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi2O3 Nanocomposites

Review On Strategies For the Design and Synthesis of Flower‐Like Bi2WO6 and BiOX (X=F, Cl, Br, I) Composites for Photocatalytic Environmental Remediation

Cellulose Nanocrystal as a New Promising Candidate in Textile Wastewater Treatment

Contact Info

Product

Resources

About

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites

Review On Strategies For the Design and Synthesis of Flower‐Like Bi₂WO₆ and BiOX (X=F, Cl, Br, I) Composites for Photocatalytic Environmental Remediation