Water flow and finger-tapping mediated piezoelectric energy generation using a natural hematite-based flexible PVDF-HFP membrane

Ghosh, Saheli; Mondal, Dhananjoy; Roy, Shubham; Roy, Jhilik; Bardhan, Souravi; Mazumder, Ayan; Bag, Neelanjana; Basu, Ruma; Das, Sukhen

doi:10.1039/d3tc01920a

Cited by 8 publications

(4 citation statements)

References 70 publications

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“…The X-ray diffractogram of this natural nano-kaolinite has been refined further by using the MAUD software package (version 2.996). 22 A well-matched refinement with a promising goodness of fitting experimental data (Figure 1a) over theoretical data further confirms the purity of natural kaolinite. The crystallographic information such as unit cell parameters, cell volume microstrain, etc., have been found and depicted in Table 1.…”

Section: Investigation Of the Physicochemical Propertiessupporting

confidence: 66%

“…The (001) plane situated at 12.39° and the (002) plane at 24.99° suggest the highly ordered kaolinite structure used in the work. The X-ray diffractogram of this natural nano-kaolinite has been refined further by using the MAUD software package (version 2.996) . A well-matched refinement with a promising goodness of fitting experimental data (Figure a) over theoretical data further confirms the purity of natural kaolinite.…”

Section: Resultsmentioning

confidence: 99%

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Natural Clay-Modified Piezocatalytic Membrane for Efficient Removal of Coliform Bacteria from Wastewater

Mondal,

Bag,

Roy

et al. 2024

Langmuir

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In the modern era, water pollution, especially from industries, agricultural farms, and residential areas, is caused by the release of a large scale of heavy metals, organic pollutants, chemicals, etc., into the environment, posing a serious threat to aquatic ecosystems and nature. Moreover, untreated sewage waste discharged directly into nearby water bodies can cause various diseases to mankind due to the high load of fecal coliform bacteria. This work demonstrates the development of a biocompatible, cost-effective, highly robust, efficient, flexible, freestanding, and reusable membrane using naturally formed biocompatible kaolinite clay-doped poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) for effective piezodynamic destruction of coliform bacteria. In this study, Escherichia coli (E. coli) and Enterococcus faecalis (E. faecalis) have been used to evaluate the mechanical stimulus-responsive antibacterial efficacy of the nanocomposite membrane. The membrane can effectively eradicate nearly 99% viable E. coli and 97% E. faecalis within a span of 40 min under mechanical stimulation (soft ultrasound ∼15 kHz). To further understand the mechanism, an evaluation of reactive oxygen species and bacterial FESEM was performed. These studies revealed that bacterial cells suffered severe visible cell damage after 40 min of piezocatalysis, elucidating the fact that the synthesized membrane is capable of producing a superior piezodynamic antibacterial effect.

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Section: Investigation Of the Physicochemical Propertiessupporting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Natural Clay-Modified Piezocatalytic Membrane for Efficient Removal of Coliform Bacteria from Wastewater

Mondal,

Bag,

Roy

et al. 2024

Langmuir

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“…Enhanced polarizability due to heightened doping percentages improves the performance of the membrane. However, higher doping concentrations hinder rapid dipole response to changes, leading to a decline in voltage over time ( Ghosh et al, 2023 ). This phenomenon is ascribed to the influence of Maxwell-Wagner polarization ( Prodromakis, 2009 ).…”

Section: Resultsmentioning

confidence: 99%

Highly efficient piezocatalytic composite with chitosan biopolymeric membranes and bismuth ferrite nanoparticles for dye decomposition and pathogenic S. aureus bacteria killing

Liu,

Roy,

Roy

et al. 2024

Front. Chem.

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Untreated wastewater harbors dangerous pathogens, chemicals, and pollutants, posing grave public health threats. Nowadays, there is a rising demand for eco-friendly technologies for wastewater treatment. Recently, piezoelectric materials-based wastewater treatment technology has captured considerable interest among researchers because of its noninvasiveness and rapidity. Herein, a highly efficient piezoelectric composite material is designed with chitosan-incorporated bismuth ferrite (BFO) nanocrystals, to decompose pollutants and ablate bacteria in wastewater. On one hand, piezoelectric BFO has shown exclusive piezo-coefficient for ultrasound-mediated reactive oxygen species (ROS) production. On the other hand, chitosan depicts its biocompatible nature, which not only promotes cellular adhesion but also significantly elevates the ROS production capabilities of BFO under ultrasound. The synergistic effect of these two piezoelectric units in one composite entity shows an improved ROS production, eradicating ∼87.8% of Rhodamine B within 80 min under soft ultrasound treatment (rate constant, k ≈ 0.02866 min−1). After performing the scavenger experiment, it has been found that hydroxyl radicals are the dominating factor in this case. Further, the reusability of the composite piezocatalyst is confirmed through multiple cycles (five times) of the same experiment. The high polarizability of the composite material facilitates the generation of piezoelectric power through finger tapping (∼12.05 V), producing substantial instantaneous piezo-voltage. Moreover, the sample exhibits remarkable antibacterial activity, with nearly 99% bacterial eradication within 30 min. This indicates a significant advancement in utilizing biopolymeric composites incorporated with BFO for fabricating versatile devices with multidimensional applications.

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“…Enhanced polarizability due to heightened doping percentages improves the performance of the membrane. However, higher doping concentrations hinder rapid dipole response to changes, leading to a decline in voltage over time (Ghosh et al, 2023). This phenomenon is ascribed to the influence of Maxwell-Wagner polarization (Prodromakis, 2009).…”

Section: Estimation Of the Piezoelectric Properties Of The Samplesmentioning

confidence: 99%

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Water flow and finger-tapping mediated piezoelectric energy generation using a natural hematite-based flexible PVDF-HFP membrane

Abstract: Piezoelectric energy generation using finger tapping and non-invasive water flow as mechanical stimuli by a Gd3+-doped natural hematite rock-based flexible free-standing PVDF membrane.

Cited by 8 publications

References 70 publications

Natural Clay-Modified Piezocatalytic Membrane for Efficient Removal of Coliform Bacteria from Wastewater

Natural Clay-Modified Piezocatalytic Membrane for Efficient Removal of Coliform Bacteria from Wastewater

Highly efficient piezocatalytic composite with chitosan biopolymeric membranes and bismuth ferrite nanoparticles for dye decomposition and pathogenic S. aureus bacteria killing

DataSheet1.docx

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