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Study on the Effect of UV Exposure on WO3/PVA based Nanocomposite Films

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Title Study on the Effect of UV Exposure on WO3/PVA based Nanocomposite Films
 
Creator Kaur, Jaspreet
Kaur, Navneet
Gupta, Tripti
Chauhan, R P
Sharma, Annu
Savita
 
Subject Hydrothermal Treatment
Nanocomposite (NC) Film
Crystallite Size (nm)
Band Gap (Eg)
Refractive Index (n)
Optical Conductivity (σopt)
Coloration Efficiency (ηph)
 
Description 452-459
In the present work, Polyvinyl Alcohol (PVA) polymer has been chosen as a host matrix to incorporate tungsten trioxide
(WO3) nanofillers for synthesizing self-supporting and flexible nanocomposites (NCs). WO3 has been synthesized using the
hydrothermal treatment and subsequently WO3/PVA based NCs were prepared via solution casting technique. To ascertain
the morphology and structure of fabricated NCs, scanning electron microscopy (SEM) and X-Ray Diffraction (XRD)
techniques were used. Further, XRD data has been analyzed to calculate the crystallite size (nm) of WO3 powder. The SEM
micrograph depicts the rod-like morphology of the prepared sample. The optical parameters like band gap (Eg), refractive
index (n), and optical conductivity (σopt) of prepared NCs were computed using optical data. Transmittance (%) of prepared
NCs has been found to decrease with increasing wt% of WO3 in PVA in UV regime highlighting their potential application
in UV shielding devices. To study the effect of UV exposure on prepared NCs, optical spectroscopy has been used in diffuse
reflectance (%) mode. The prepared NCs exhibit a significant decrease in diffuse reflectance (%) with increasing UV
exposure time. Coloration efficiency (ηph) of the WO3/PVA NCs has been calculated using optical data. Coloration
efficiency (ηph) of 10 wt% WO3/PVA NC film is (~ 0.1099) and decreases with a decrease in wt% of WO3 in PVA.
 
Date 2023-08-16T11:56:48Z
2023-08-16T11:56:48Z
2023-08
 
Type Article
 
Identifier 0971-4588 (Print); 0975-1017 (Online)
http://nopr.niscpr.res.in/handle/123456789/62436
https://doi.org/10.56042/ijems.v30i3.3701
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJEMS Vol.30(3) [June 2023]