Synthesis, Luminescence and Thermal Properties of PVA–ZnO–Al2O3 Composite Films: Towards Fabrication of Sunlight-Induced Catalyst for Organic Dye Removal

Khan, Mohammad Mizanur Rahman; Akter, M. R.; Amin, Md. Khairul; Younus, Muhammad; Chakraborty, Nilave

doi:10.1007/s10924-018-1220-9

Cited by 53 publications

(28 citation statements)

References 47 publications

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“…Such a peak is assigned to the removal of free (moisture) and hydrogen-bonded water. 6 The exothermic peak was also observed for both PVA and composites samples. The third peak corresponds to the melting temperature ( T m ) identified at 190 °C for PVA (Figure 7b).…”

Section: Results and Discussionmentioning

confidence: 88%

“…The composite films demonstrate absorption band around at 212 nm, whereas PVA shows its characteristic band at 189 nm. 6 Such differences of the absorption band between PVA and its composite with ZnS can be attributed to the bathochromic shift or red shift of PVA and imply the strong interactions between them. Similar absorption peaks because of the interaction of PVA with other inorganic materials were also previously observed in ref (23).…”

Section: Results and Discussionmentioning

confidence: 99%

“…The degree of crystallinity was calculated using the equation (Δ H m /Δ H m 0 ) ×100. 6 The Δ H m is the measured enthalpy of melting obtained from DSC thermogram, and Δ H m ° is the enthalpy of melting for 100% crystalline PVA (taken as 138.6 J/g). 42 The value of Δ H m for PVA was 29.02 J/g.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Polymers consisting of inorganic nanoparticles embedded in a transparent host matrix have the ability to fabricate unique properties such as optical, thermal, and high dielectric constant properties for precise applications such as sensors, photoelectric conversion, and photocatalysts. 6−8 Among the organic polymers, polyvinyl alcohol (PVA) has been used extensively for the preparation of nanocomposites because of its easy processability, an extremely hydrophilic nature, good film-forming capability, and optical transparency. Besides, the solubility of PVA in an aqueous medium makes the incorporated nanoparticles be easily dispersed in the solvent, thus making the nanocomposite preparation almost nontoxic.…”

Section: Introductionmentioning

confidence: 99%

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Simple Fabrication of PVA–ZnS Composite Films with Superior Photocatalytic Performance: Enhanced Luminescence Property, Morphology, and Thermal Stability

et al. 2019

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Poly(vinyl alcohol) (PVA)–ZnS composite films were prepared by varying the composition of PVA ranging from 1–5 wt % through a simple solvent casting method. The photocatalytic enactment of the composites was evaluated along with the investigations of their photoluminescence (PL), optical transparency, morphology, and thermal properties. The firm interaction between the ZnS and PVA was confirmed by Fourier transform infrared, UV–vis, and PL spectroscopies. PVA–ZnS composites showed enhanced luminescence property than PVA. The composites exhibited very good optical transparency regardless of the amount of PVA addition. The thermogravimetric analysis data indeed exhibited better thermal stability of the composites. The glass transition temperature ( T g ), melting temperature ( T m ), enthalpy of melting (Δ H m ), and crystallinity were evaluated for such composites. The composites demonstrated morphological variations depending on the amount of PVA addition, although the particle size of ZnS remained similar in the nanometer range (50–120 nm) for all composite samples. The prepared composite films exhibited superior photocatalytic performance in the degradation of methylene blue compared with the bare ZnS and PVA. This study may give a new insight into the fabrication of PVA–ZnS photocatalysts for the treatment of organic pollutants.

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Section: Results and Discussionmentioning

confidence: 88%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simple Fabrication of PVA–ZnS Composite Films with Superior Photocatalytic Performance: Enhanced Luminescence Property, Morphology, and Thermal Stability

et al. 2019

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“…Hence, heterogeneous semiconductor photocatalyst nanocomposites have great potential for converting solar energy into chemical energy and for decomposing organic dyes [10,11]. The present work reported, PVA/CuO NTs/Asp nanocomposites are better materials for the pollutant MB dye removal because of its high; photocatalytic activity [12], optical transparency [13], refractive index [14], optical absorption [15], photovoltaic performance of low-bandgap [16,17], adsorption [18], hydrophilic surface [19] and self-cleaning [20,21] Polyvinyl alcohol (PVA) is hydrophilic synthetic polymer which has now received a lot of attention from researchers due to its excellent film-forming properties, nontoxicity, biodegradability and optical transparency [22,23]. Adsorption of Dyes Using Poly (vinyl alcohol) (PVA) and PVA-Based Polymer Composite adsorbents are well studied in the literature [24].…”

Section: Introductionmentioning

confidence: 89%

Novel PVA nanocomposite films: Synthesis, structure, optical and photocatalytic properties evaluation.

Amaregouda¹,

Kamanna²

2021

Preprint

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The present work describes design and preparation of novel PVA nanocomposite films using CuO NTs and Asp by solution casting method. The required CuO NTs prepared by novel biogenic method using Robinia Pseudoacacia Leaf Extract. The prepared CuO NTs and nanocomposite films are characterized by various spectroscopy techniques. The adsorption and photocatalytic efficiencies of PVA nanocomposite films were compared with pristine CuO NTs. The adsorption capacity of PVA nanocomposite films showed higher due to functional groups, presence of active sites, high surface activity and semiconducting nature of CuO NTs and Asp embedded in PVA matrix. The adsorption behavior of the nanocomposite shows that adsorption isotherms and kinetics are in good agreement with Langmuir equation, Freundlich equation and pseudo-second-order, respectively. The comparative photocatalytic activities of the CuO NTs other nanocomposite films are examined methylene blue (MB) as a substrate degradation, and film PVA/CuO NTs/Asp showed highest (up to 77%) degradation compared to other films and CuO NTs in 50 min time duration. The improved photocatalytic behavior of PVA nanocomposite film attributed to its narrower band gap reduces the recombination rate of exited electron-hole, enhanced UV-Vis absorption intensity, improved utilization of sunlight and enhanced adsorption of dye due to functional groups, surface wettability, hydrophilic surface and self-cleaning nature.

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Effect of metal oxides added onto polyvinyl alcohol via pulsed underwater plasma on their thermal, electrical and dielectric properties

Khlyustova

Sirotkin

Краев

et al. 2021

J of Applied Polymer Sci

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Flexible electronics require materials with high breakdown strength, high dielectric constant, and thermal stability. These conditions are met by composites based on polymers and metal oxides. In this article, we present a new onestep method for producing composites based on water-soluble polyvinyl alcohol (PVA) and metal oxides (AlOOH, CuO, and ZnO). The source of oxides is underwater plasma. The oxides are introduced into the polymer matrix when plasma is exposed to the polymer solution. The results of X-ray, IR, and SEM analysis showed that metal oxides are embedded in the polymer. Differential scanning calorimetry measurements have shown that the glass transition temperature depends on the oxide being incorporated. The electrical properties of polymer composites were studied by current-voltage characteristics. Dielectric properties were measured in the range of 25-10 6 Hz. The properties of obtained PVA + metal oxide showed that using underwater plasma is a suitable method for producing composites for electronic devices.

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Synthesis, Luminescence and Thermal Properties of PVA–ZnO–Al2O3 Composite Films: Towards Fabrication of Sunlight-Induced Catalyst for Organic Dye Removal

Cited by 53 publications

References 47 publications

Simple Fabrication of PVA–ZnS Composite Films with Superior Photocatalytic Performance: Enhanced Luminescence Property, Morphology, and Thermal Stability

Simple Fabrication of PVA–ZnS Composite Films with Superior Photocatalytic Performance: Enhanced Luminescence Property, Morphology, and Thermal Stability

Novel PVA nanocomposite films: Synthesis, structure, optical and photocatalytic properties evaluation.

Effect of metal oxides added onto polyvinyl alcohol via pulsed underwater plasma on their thermal, electrical and dielectric properties

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