Synthesis and characterization of Poly-Vinyl Alcohol-Alumina composite film: An efficient adsorbent for the removal of Chromium (VI) from water

Binish, C.J.; Vijayasankar, A.V.; Aan, M.P Sham

doi:10.1016/j.matpr.2022.02.629

Cited by 9 publications

(5 citation statements)

References 13 publications

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“…Its biodegradability lessens plastic waste, while water solubility allows for easier device fabrication and disposal. 15,16 Furthermore, the unique properties of PVA can be tailored to specific optoelectronic needs, making it a versatile and ecofriendly material for the future. 17 Polyvinyl alcohol (PVA) boasts several characteristics ideal for film fabrication in optoelectronics.…”

Section: Introductionmentioning

confidence: 99%

“…Polyvinyl alcohol (PVA) emerges as a promising sustainable polymer for optoelectronic applications. Its biodegradability lessens plastic waste, while water solubility allows for easier device fabrication and disposal 15,16 . Furthermore, the unique properties of PVA can be tailored to specific optoelectronic needs, making it a versatile and eco‐friendly material for the future 17 .…”

Section: Introductionmentioning

confidence: 99%

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Synergistic fabrication, characterization, and prospective optoelectronic applications of DES grafted activated charcoal dispersed PVA films

Lokesh Kumar,

Binish,

Rajprasad

et al. 2024

Polymers for Advanced Techs

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This study investigates the synthesis, analysis, and utility of films comprising deep eutectic solvent (DES) grafted activated charcoal (AC) within a polyvinyl alcohol (PVA) matrix for optoelectronic device applications. The fabrication process involves the dispersion of DES functionalization AC into the PVA solution, followed by casting onto substrates with controlled drying. Comprehensive characterization encompassing X‐ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis spectroscopy, Fourier‐transform infrared spectroscopy (FTIR), and impedance spectroscopy which discerns the films microstructure, morphology, conductance, band‐gap, and optical traits. The DES grafted AC infusion with variable concentration has significantly influenced optical absorbance and reduced the band gap indicating efficient charge mobility. Furthermore, the impedance analysis has revealed the electrical conduction of the film to be 1.8 × 10−6 Ω−1 m−1. In summary, the dispersion of DES modified AC in the PVA matrix have converted the insulating PVA to a semiconducting polymeric film with reduced band‐gap and increased absorption, which present a propitious avenue for wide array of optoelectronic devices, such as thin film transistors, photovoltaics, LEDs, photodetectors, and many such applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synergistic fabrication, characterization, and prospective optoelectronic applications of DES grafted activated charcoal dispersed PVA films

Lokesh Kumar,

Binish,

Rajprasad

et al. 2024

Polymers for Advanced Techs

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“…Heavy metals are categorized by the World Health Organization as substances that are carcinogenic and toxic. Contamination from heavy metals such as As, Pb, Cr, Cd, and Hg, has resulted in serious health problems (Binish et al 2022). Cr exists in two oxidation states: Cr(III) and Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

A novel biochar-based 3D composite for ultrafast and selective Cr(VI) removal in electroplating wastewater

Yang,

Wang,

Zhao

et al. 2024

Biochar

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In this study, a newly developed composite of biochar-poly(m-phenylenediamine) (BC-PmPD) exhibiting a distinct skeletal structure was synthesized for the purpose of extracting Cr(VI) from aqueous solutions. BC was employed as a supportive carrier onto which PmPD nanoparticles were uniformly affixed through in-situ polymerization and oxidation synthesis, both within and outside the layered configuration of BC. The structural stability and morphologies of BC-PmPD were assessed utilizing Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy, thermogravimetric analysis, analysis of specific surface area and pore size, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction. In comparison to other modified BCs reported, BC-PmPD exhibited the highest Cr(VI) removal rate. Specifically, at 303 K, BC-PmPD achieved a maximum Cr(VI) removal capacity of 775 mg g−1, surpassing the capabilities of unmodified BC and PmPD by 10.4 and 2.13 times, respectively. Analyses involving XPS, FTIR, and density functional theory calculation confirmed that proton transfer happened between protonated amine (−NH2) functional group within the structure of BC-PmPD and HCrO4− before the formation of hydrogen bond. Subsequently, environmentally persistent free radicals facilitated the reduction of the adsorbed Cr(VI). Quantification of the functional groups indicated that the amino group was responsible for 93.0% of the Cr(VI) adsorption in BC-PmPD. BC-PmPD displayed potent adsorption and reduction capabilities, alongside notable stability, repeatability, and promising potential for application in the remediation for high concentrations of Cr(VI) in electroplating wastewater scenarios. Graphical Abstract

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“…The simple, scalable processes used to fabricate polymer films 3,4 make them a cost‐effective option for large‐scale production. There has been a growing interest among researchers in using films for catalytic reactions instead of powdered catalysts 5 . Films offer several advantages over other forms of catalysts, including a high surface area, uniformity of coating, enhanced selectivity, and ease of handling.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of metals and cross linkers on surface modification of iron aluminum oxyhydroxide‐PVA polymer films for enhanced catalytic activity in transesterification reaction

Binish,

Kopparapu,

Vijayasankar

et al. 2023

J of Applied Polymer Sci

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Iron‐incorporated aluminum oxyhydroxide polyvinyl alcohol films (Fe‐Al‐PVA) were synthesized using the sol–gel method. The influence of cross‐linking agents on the aluminum oxyhydroxide films was investigated by incorporating glutaraldehyde into the synthesized films. Various characterization techniques were employed to understand the physico‐chemical properties that affect the catalytic and adsorptive behavior of the self‐supported films. The liquid phase transesterification of terpenes was used to test the catalytic activity of the films for the synthesis of industrially important terpene esters. The products were analyzed using GC, GC–MS, and NMR techniques, and optimization studies were carried out under different experimental conditions. The reaction scope was expanded to a wider range of organic compounds, and a possible reaction mechanism was proposed. This study demonstrates the design and modification of efficient bimetallic polymer film catalyst for organic transformations.

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Synthesis and characterization of Poly-Vinyl Alcohol-Alumina composite film: An efficient adsorbent for the removal of Chromium (VI) from water

Cited by 9 publications

References 13 publications

Synergistic fabrication, characterization, and prospective optoelectronic applications of DES grafted activated charcoal dispersed PVA films

Synergistic fabrication, characterization, and prospective optoelectronic applications of DES grafted activated charcoal dispersed PVA films

A novel biochar-based 3D composite for ultrafast and selective Cr(VI) removal in electroplating wastewater

Synergistic effect of metals and cross linkers on surface modification of iron aluminum oxyhydroxide‐PVA polymer films for enhanced catalytic activity in transesterification reaction

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