Geodesic
Photochromic aerogels based on cellulose and chitosan modified with WO$_3$ nanoparticles
Nanosistemy: fizika, himiâ, matematika, Tome 13 (2022) no. 4, pp. 404-413.

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In this work, we report the first synthesis of photochromic aerogels and films based on TEMPO-oxidized cellulose and chitosan modified with tungsten trioxide nanoparticles. The blue coloring of aerogels based on WO$_3$-modified biopolymers under UV light occurs due to the reduction of WO$^{+6}$ to WO$^{+5}$. The coloration of films of the same composition occurs due to the reduction of W$^{+6}$ to W$^{+5}$ and W$^{+4}$. The photochromic properties of aerogels and films are reversible; oxidation by atmospheric oxygen leads to bleaching of materials. At that, films become colorless within a few days while aerogels with a high specific surface area (200 m$^2$/g) become colorless within several minutes. The antioxidant properties of the WO$_3$ sol and the WO$_3$/TEMPO-oxidized cellulose/chitosan composite were studied by luminol-activated chemiluminescence method. The antioxidant capacity of WO$_3$/TEMPO-oxidized cellulose/chitosan gel is 1.5 times higher than that of the commercially available antioxidant mexidol.
Keywords: aerogel, hybrid materials, biopolymers, tungsten oxide, photochromic material, antioxidant.
Mots-clés : nanocomposite, cellulose, chitosan 
@article{NANO_2022_13_4_a4,
     author = {Svetlana V. Kameneva and Matvei A. Popkov and Ilya V. Tronev and Sergey Yu. Kottsov and Madina M. Sozarukova and Vladimir K. Ivanov},
     title = {Photochromic aerogels based on cellulose and chitosan modified with {WO}$_3$ nanoparticles},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {404--413},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2022_13_4_a4/}
}
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%A Svetlana V. Kameneva
%A Matvei A. Popkov
%A Ilya V. Tronev
%A Sergey Yu. Kottsov
%A Madina M. Sozarukova
%A Vladimir K. Ivanov
%T Photochromic aerogels based on cellulose and chitosan modified with WO$_3$ nanoparticles
%J Nanosistemy: fizika, himiâ, matematika
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%N 4
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Svetlana V. Kameneva; Matvei A. Popkov; Ilya V. Tronev; Sergey Yu. Kottsov; Madina M. Sozarukova; Vladimir K. Ivanov. Photochromic aerogels based on cellulose and chitosan modified with WO$_3$ nanoparticles. Nanosistemy: fizika, himiâ, matematika, Tome 13 (2022) no. 4, pp. 404-413. http://geodesic.mathdoc.fr/item/NANO_2022_13_4_a4/