Shishkin Andrey Yu, Fukina Diana G, Rumyantseva Victoria O, Shilova Elena V, Ganov Alexander S, Shalaginova Irina A, Kornienko Pavel V, Suleimanov Evgeny V, Semenycheva Ludmila L, Smirnov Vasily F
Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia.
Institute of Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarina Prospect, 23, 603950, Nizhny Novgorod, Russia.
Photochem Photobiol Sci. 2024 Dec;23(12):2237-2253. doi: 10.1007/s43630-024-00664-w. Epub 2024 Nov 29.
New photocatalytic materials based on complex oxides and a widely used and cheap polymer (PMMA) have been prepared. Among complex oxides previously investigated, the following have been used-RbTeWO, CsTeMoO, CsVTeO, NaVMoO, KVMoO. For comparison, the binary oxides TiO and WO were used. The form of PMMA matrix was used as sponge and glass. The amount of powder in PMMA was selected based on retaining the polymer properties and getting the photocatalytic activity, which corresponds to 1% powder in sponge and 0.5% in glass. The "photocatalyst/PMMA" composites decompose the methylene blue under visible and UV light as well as possess antibacterial properties. The high electron-hole recombination was found out for composites photocatalysts, which significantly influences only on organic compounds decomposition in solutions. However, there is no direct dependence between effective photodegradation of simple organic molecules and antimicrobial properties. Inactivation of bacteria is determined by many factors such as active generated radicals, adsorption properties of the surface and the photocatalyst form, which can change the main active radicals. The comparison of photocatalytic action on organic solutions and bacteria of initial powders and PMMA composites allow choosing the most effective combination for further application. The most promising antimicrobial properties for composites have been obtained using compounds with β-pyrochlore structure.
基于复合氧化物和一种广泛使用且价格低廉的聚合物（聚甲基丙烯酸甲酯，PMMA）制备了新型光催化材料。在先前研究的复合氧化物中，使用了以下几种——铷碲钨酸盐、铯碲钼酸盐、铯钒碲酸盐、钠钒钼酸盐、钾钒钼酸盐。作为对比，还使用了二元氧化物二氧化钛和三氧化钨。PMMA基体的形态为海绵状和玻璃状。基于保留聚合物性能并获得光催化活性来选择PMMA中粉末的含量，这对应于海绵中1%的粉末和玻璃中0.5%的粉末。“光催化剂/PMMA”复合材料在可见光和紫外光下能分解亚甲基蓝，并且具有抗菌性能。发现复合光催化剂存在高电子 - 空穴复合现象，这仅对溶液中有机化合物的分解有显著影响。然而，简单有机分子的有效光降解与抗菌性能之间没有直接关联。细菌的失活由许多因素决定，如活性产生的自由基、表面的吸附性能以及光催化剂的形态，这些因素会改变主要的活性自由基。对初始粉末和PMMA复合材料在有机溶液和细菌上的光催化作用进行比较，有助于选择最有效的组合以供进一步应用。使用具有β - 烧绿石结构化合物的复合材料获得了最有前景的抗菌性能。
