Author:
Tarutani Naoki,Kato Ryuma,Uchikoshi Tetsuo,Ishigaki Takamasa
Abstract
AbstractSemiconductor photocatalysts showing excellent performance under irradiation of both ultraviolet (UV)- and visible (VIS)-light are highly demanded towards realization of sustainable energy systems. TiO2 is one of the most common photocatalysts and has been widely investigated as candidate showing UV/VIS responsive performance. In this study, we report synthesis of Nb doped TiO2 by environmentally benign mechanochemical reaction. Nb atoms were successfully incorporated into TiO2 lattice by applying mechanical energy. As synthesized Nb doped TiO2 were metastable phase and formed chemical compositional gradient structure of poorly Nb doped TiO2 core and highly Nb doped TiO2 surface after high temperature heat treatment. It was found that formed gradient chemical compositional heterojunctions effectively enhanced photocatalytic performance of Nb doped TiO2 under both of UV- and VIS-light irradiation, which is different trend compared with Nb doped TiO2 prepared through conventional methods. The approach shown here will be employed for versatile systems because of simple and environmentally benign process.
Funder
Japan Society for the Promotion of Science
Foundation for the Promotion of Ion Engineering
Izumi Science and Technology Foundation
International Network on Polyoxometalate Science at Hiroshima University
Ministry of Education, Culture, Sports, Science and Technology
Publisher
Springer Science and Business Media LLC
Cited by
10 articles.
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