najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2022-13-4-404-413najo-251Research ArticleСтатьиPhotochromic aerogels based on cellulose and chitosan modified with WO3 nanoparticlesKamenevaS. V.kamenevasvetlanav@gmail.comPopkovM. A.popkovma2001@mail.ruTronevI. V.ivtronev@edu.hse.ruKottsovS. Yu.sergey12-17@yandex.ruSozarukovaM. M.s_madinam@bk.ruIvanovV. K.van@igic.ras.ruKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of SciencesRussian FederationKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences; Lomonosov Moscow State UniversityRussian FederationKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences; HSE UniversityRussian Federation202206062025134404413Copyright © Kameneva S.V., Popkov M.A., Tronev I.V., Kottsov S.Y., Sozarukova M.M., Ivanov V.K., 20252025Kameneva S.V., Popkov M.A., Tronev I.V., Kottsov S.Y., Sozarukova M.M., Ivanov V.K.Kameneva S.V., Popkov M.A., Tronev I.V., Kottsov S.Y., Sozarukova M.M., Ivanov V.K.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/251

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 WO3-modified biopolymers under UV light occurs due to the reduction of W+6 to W+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 m2/g) become colorless within several minutes. The antioxidant properties of the WO3 sol and the WO3/TEMPO-oxidized cellulose/chitosan composite were studied by luminol-activated chemiluminescence method. The antioxidant capacity of WO3/TEMPO-oxidized cellulose/chitosan gel is 1.5 times higher than that of the commercially available antioxidant mexidol.

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The authors declare that there are no conflicts of interest present.