Structural and optical properties of polymer blend nanocomposites based on PVP/PVA incorporated AgNO3

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-21 DOI:10.1088/2399-6528/ad4e97

V. J. Jalal

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Abstract

In this study, polymer nanocomposite based on polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), and silver nitrate (AgNO3) has been prepared through chemical reduction rate and casting method for varying concentrations of AgNO3. The PVP/PVA blend consisted of 0.6 wt.% PVP and 0.4 wt.% PVA. Following that, polymer nanocomposites were prepared by incorporating different concentrations of AgNO3 (0, 10, 20, 30, 40, and 50 wt.%) into the polymer blend. The effects of different concentrations of AgNO3 on the structural and optical properties of the PVP/PVA blend were investigated using X-ray diffraction (XRD) and UV-Vis absorption spectroscopy. The XRD analysis demonstrated that increasing the concentration of AgNO3 results in a decrease in the degree of crystallinity from 53.73 in the PVP/PVA blend to 15.77 in the PVP/PVA nanocomposite containing 50 wt.% AgNO3. UV-Vis absorbance spectra were examined to determine optical properties such as the absorption coefficient, absorption edge, optical band gap, and tails of localized states. The results revealed that the increase in AgNO3 concentrations caused a reduction in the absorption edge and optical band gap, alongside an increase in Urbach energy.

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基于含有 AgNO3 的 PVP/PVA 的聚合物共混纳米复合材料的结构和光学特性

本研究通过化学还原法和浇铸法制备了不同浓度的聚乙烯吡咯烷酮（PVP）、聚乙烯醇（PVA）和硝酸银（AgNO3）聚合物纳米复合材料。PVP/PVA 混合物由 0.6 重量百分比的 PVP 和 0.4 重量百分比的 PVA 组成。然后，在聚合物混合物中加入不同浓度的 AgNO3（0、10、20、30、40 和 50 wt.%），制备聚合物纳米复合材料。利用 X 射线衍射（XRD）和紫外可见吸收光谱研究了不同浓度的 AgNO3 对 PVP/PVA 共混物结构和光学特性的影响。XRD 分析表明，增加 AgNO3 的浓度会导致结晶度降低，从 PVP/PVA 混合物中的 53.73 降低到含 50 wt.% AgNO3 的 PVP/PVA 纳米复合材料中的 15.77。对紫外-可见吸收光谱进行了检测，以确定吸收系数、吸收边、光带隙和局部态尾等光学特性。结果表明，随着 AgNO3 浓度的增加，吸收边和光带隙减小，同时 Urbach 能量增加。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.