Markovskaya Dina V, Zhurenok Angelina V, Kurenkova Anna Yu, Kremneva Anna M, Saraev Andrey A, Zharkov Sergey M, Kozlova Ekaterina A, Kaichev Vasily V
Federal Research Center Boreskov Institute of Catalysis Lavrentiev Ave., 5 Novosibirsk 630090 Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS Akademgorodok 50/38 Krasnoyarsk 660036 Russia.
RSC Adv. 2020 Sep 15;10(56):34137-34148. doi: 10.1039/d0ra07630a. eCollection 2020 Sep 10.
A series of CuO -TiO photocatalysts were prepared using fresh and thermally activated Evonik Aeroxide P25 titanium dioxide. The photocatalysts were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, XANES, diffuse reflectance spectroscopy, and N adsorption technique. Photocatalytic activity of the samples was tested in hydrogen production from aqueous-alcoholic solutions of methylene blue under UV radiation ( = 386 nm). It was found for the first time the synergistic effect of hydrogen production from two substrates-dye and ethanol. The maximum hydrogen production rate in the system water-ethanol-methylene blue was 1 μmol min, which is 25 times higher than a value measured in a 10% solution of ethanol in water. The thermal activation of titania also leads to a change in the rate of hydrogen production. The highest catalytic activity was observed for a CuO -TiO photocatalyst based on titania thermally-activated at 600 °C in air. A mechanism of the photocatalytic reaction is discussed.
使用新鲜的和热活化的赢创德固赛P25二氧化钛制备了一系列CuO -TiO光催化剂。通过X射线衍射、透射电子显微镜、X射线光电子能谱、X射线吸收近边结构、漫反射光谱和N吸附技术对光催化剂进行了表征。在紫外辐射（λ = 386 nm）下，以亚甲基蓝的水-醇溶液制氢来测试样品的光催化活性。首次发现了由染料和乙醇这两种底物制氢的协同效应。水-乙醇-亚甲基蓝体系中的最大产氢速率为1 μmol min，这比在10%乙醇水溶液中测得的值高25倍。二氧化钛的热活化也导致产氢速率发生变化。对于基于在空气中600℃热活化的二氧化钛的CuO -TiO光催化剂，观察到了最高的催化活性。讨论了光催化反应的机理。
