Functionalized MWCNT-integrated natural clay nanosystem: a promising eco-friendly capacitor for energy storage applications

Mondal, Dhananjoy; Sau, Arjun C.; Roy, Shubham; Bardhan, Souravi; Roy, Jhilik; Ghosh, Saheli; Basu, Ruma; Sutradhar, Soumyaditya; Das, Sukhen

doi:10.1007/s10854-023-11007-3

Cited by 1 publication

(4 citation statements)

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“…Herein, the negative surface charge of the natural clay enhances the polar phase of the PVDF-HFP, which is a key factor that enhances the piezo-effectiveness . In reality, kaolinite is a layered aluminosilicate clay of alumina (AlO 6 ) octahedrons and silica (SiO 2 ) tetrahedrons where the isomorphous substitution of Al 3+ and Si 4+ creates a negative charge over the basal planes and a positive charge over the prism planes (faces) of kaolinite . The basal plane of kaolinite is greater in length than the prism plane; therefore, a combined negative surface charge was found in kaolinite (−7.9 mV).…”

Section: Resultsmentioning

confidence: 91%

“…29 In reality, kaolinite is a layered aluminosilicate clay of alumina (AlO 6 ) octahedrons and silica (SiO 2 ) tetrahedrons where the isomorphous substitution of Al 3+ and Si 4+ creates a negative charge over the basal planes and a positive charge over the prism planes (faces) of kaolinite. 10 The basal plane of kaolinite is greater in length than the prism plane; therefore, a combined negative surface charge was found in kaolinite (−7.9 mV). The incorporation of electro-negative functional groups attached to the positive prism planes further influences the negative surface charge (−11.1 mV, Figure S1) of the nano-clay, as depicted in a schematic diagram in Figure 1d.…”

Section: Estimation Of Polarity Andmentioning

confidence: 99%

“…9 Various physicochemical activities of this natural kaolinite are enhanced in its nano-regime due to its high surface-to-volume aspect ratio. 10 Among all these physicochemical properties, surface charge is a key factor. In reality, kaolinite shows a negative surface charge for the combined effect of its negative basal planes and positive prism planes.…”

Section: Introductionmentioning

confidence: 99%

“…Kaolinite is a highly stable, eco-friendly, natural, abundant, and economical aluminosilicate (Al 2 Si 2 O 5 (OH) 4 ) clay . Various physicochemical activities of this natural kaolinite are enhanced in its nano-regime due to its high surface-to-volume aspect ratio . Among all these physicochemical properties, surface charge is a key factor.…”

Section: Introductionmentioning

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: Resultsmentioning

confidence: 91%

Section: Estimation Of Polarity Andmentioning

confidence: 99%