Hollow Spherical Hierarchical MoO3/SiO2–TiO2 Structures for Photocatalytic Decomposition of Organic Pollutant in Water; Applied Materials Today; Vol. 29

Hollow Spherical Hierarchical MoO3/SiO2–TiO2 Structures for Photocatalytic Decomposition of Organic Pollutant in Water; Applied Materials Today; Vol. 29

Bibliographic Details
Parent link:Applied Materials Today
Vol. 29.— 2022.— [101655, 12 р.]
Corporate Author: Национальный исследовательский Томский политехнический университет Юргинский технологический институт
Other Authors: Kuznetsova S. A. Svetlana, Khalipova O. S. Olga, Lisitsa K. V. Konstantin, Selunina L. A. Liliya, Khasanov V. V. Victor, Malchik A. G. Aleksandra Gennadievna, Yu-Wen Chen
Summary:Title screen
In this study MoO3/TiO2-SiO2 layered spherical composites, having hierarchical structure, were synthesized on TOKEM-320Y anion exchanger template using by sol-gel methods. Properties of MoO3/TiO2-SiO2 composites were characterized by XRD, EDS, SEM, 3D X-ray microtomography, Raman, IR, DRS, BET, and PL techniques. The SEM, 3D X-ray microtomography and EDS analysis showed hollow spherical composites with diameters ranging from 200 to 400 μm with core/shell structure. The formation of TiO2-SiO2 shell on the MoO3 core results in lower oxygen vacancy concentrations in composite (0.0425) and a reduced bandgap width (2.56 eV in compare to 3.19 eV for MoO3 sample, which was analyzed through the UV-VIS DRS method). The performance of MoO3/TiO2-SiO2 composites was evaluated by photocatalytic degradation of methylene blue (MB) aqueous solution irradiated with an I2 excilamp (λmax = 312 nm). The photoabsorption energy properties of MoO3/TiO2-SiO2 composites are related to the interaction between TiO2-SiO2 and MoO3 which occurs through oxygen in Ti-O-Mo and Si-O-Mo. The MoO3/TiO2-SiO2 composites exhibited a much higher photocatalytic activity (rate constant is 0.0645 min‒1, degradation efficiency is 93% (20 min). This work demonstrates the relation between the formation of heterostructure in core/shell composite and its photocatalitic activity, providing fundamental guidance to improve photocatalytic performance of materials.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2022
Subjects:
электронный ресурс
труды учёных ТПУ
Online Access:https://doi.org/10.1016/j.apmt.2022.101655
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668365

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