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<p>The rapid growth in global population puts immense pressure on resources like water, making access to clean and safe drinking water a critical issue. Traditional water purification methods often require significant time, energy, or infrastructure. Wastewater treatment faces evolving challenges due to emergence of complex pollutants such as pharmaceuticals, harmful chemical byproducts, and heavy metals etc. As a result, researchers are actively seeking greener and more eco-friendly alternatives. Nanomaterial-based photo catalysis have been the choice of new method and it has been developed to eliminate organic dyes from waste water effectively. In this context, we propose a green and cost-effective approach for the photo catalytic degradation of amaranth dye using green synthesized bismuth vanadate (BV-1) nanoparticles (NPs) and the other catalyst modified with polyvinyl alcohol (BV-PVA). The BiVO₄ NPs were synthesized through a green method utilizing a biogenic extract of <i>Momordica cymbalaria (M. cymbalaria)</i> (BV-1 NPs and <i>Momordica charantia (M. charantia)</i> (BV-2 NPs) as a capping agent through hydrothermal method. Extensive characterization of the synthesized BiVO₄ NPs (BV-PVA, BV-1, BV-2) was conducted using BET, SEM, TEM, XRD, UV, and FTIR. These studies reveal a unique morphology for the three types of synthesized NPs. The effects of medium pH, catalyst dosage, and dye concentration on the photo catalytic degradation process were thoroughly investigated and optimized. BV-PVA NPs which is 5.71&#xa0;nm demonstrated 84.02% efficiency after 100&#xa0;min, while <i>M. cymbalaria</i> extract-assisted bismuth vanadate (BV-1 NPs) 9.63&#xa0;nm exhibited superior performance with 92.67% efficiency after 100&#xa0;min. Thus, these studies indicate that plant extracts play a significant role in modifying the morphology, particle size, and optical properties of NPs. It can be concluded that the BiVO<sub>4</sub> NPs; BV-PVA, BV-1 possesses promising potential for the photo catalytic removal of amaranth dye under visible light illumination, making it a viable option for treating dye-contaminated effluents. These experiments provide new insights into the application of BiVO<sub>4</sub>-based nano-materials in the field of visible light catalytic degradation.</p> Graphical Abstract <p></p>

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Morphology controlled-surfactant free plant-mediated synthesis of BiVO4 and its dye degradation property

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Udhayakumar Ananthi,
  • A. Mary Saral

摘要

The rapid growth in global population puts immense pressure on resources like water, making access to clean and safe drinking water a critical issue. Traditional water purification methods often require significant time, energy, or infrastructure. Wastewater treatment faces evolving challenges due to emergence of complex pollutants such as pharmaceuticals, harmful chemical byproducts, and heavy metals etc. As a result, researchers are actively seeking greener and more eco-friendly alternatives. Nanomaterial-based photo catalysis have been the choice of new method and it has been developed to eliminate organic dyes from waste water effectively. In this context, we propose a green and cost-effective approach for the photo catalytic degradation of amaranth dye using green synthesized bismuth vanadate (BV-1) nanoparticles (NPs) and the other catalyst modified with polyvinyl alcohol (BV-PVA). The BiVO₄ NPs were synthesized through a green method utilizing a biogenic extract of Momordica cymbalaria (M. cymbalaria) (BV-1 NPs and Momordica charantia (M. charantia) (BV-2 NPs) as a capping agent through hydrothermal method. Extensive characterization of the synthesized BiVO₄ NPs (BV-PVA, BV-1, BV-2) was conducted using BET, SEM, TEM, XRD, UV, and FTIR. These studies reveal a unique morphology for the three types of synthesized NPs. The effects of medium pH, catalyst dosage, and dye concentration on the photo catalytic degradation process were thoroughly investigated and optimized. BV-PVA NPs which is 5.71 nm demonstrated 84.02% efficiency after 100 min, while M. cymbalaria extract-assisted bismuth vanadate (BV-1 NPs) 9.63 nm exhibited superior performance with 92.67% efficiency after 100 min. Thus, these studies indicate that plant extracts play a significant role in modifying the morphology, particle size, and optical properties of NPs. It can be concluded that the BiVO4 NPs; BV-PVA, BV-1 possesses promising potential for the photo catalytic removal of amaranth dye under visible light illumination, making it a viable option for treating dye-contaminated effluents. These experiments provide new insights into the application of BiVO4-based nano-materials in the field of visible light catalytic degradation.

Graphical Abstract