title: Advanced Fabrication of Chemically Bonded Graphene/TiO2Continuous Fibers with Enhanced Broadband Photocatalytic Properties and Involved Mechanisms Exploration.
abstract: In this article, a novel route for the synthesis of graphene/TiO2continuous fibers (GTF) using force-spinning combined with water vapor annealing method is reported for the first time. The morphology, structure and optical properties of the composite were fully characterized. With a single step of heat treatment process using steam at ambient conditions, we were able to initiate a series of chemical reactions, such as reduction of graphene oxide (GO), crystallization of TiO2, formation of C-Ti bond, and introduction of oxygen vacancies into TiO2. The incorporation of graphene in TiO2fibers facilitated bandgap narrowing and improved photo-induced charge separation in the photocatalyst. As a result of synergistic effects, TiO2fibers-2 wt% graphene (2%GTF) showed the highest photocatalytic activities in the degradation of X-3B under UV irradiation, superior to the benchmark photocatalyst P25. Under visible light irradiation, the same catalyst was about 4 times more efficient compared to pure TiO2fibers (PTF). A detailed study of involved active species (in particular, ·, h+and ·OH) unraveled the mechanism regarding photocatalysis.
authors.affiliation: School of Environmental Science and Engineering, Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Shanda South Road 27, Jinan 250100, P. R. China.|Institut National de la Recherche Scientifique (INRS), Centre Énergie Materiaux et Télécommunications, Université du Québec, 1650 Boulevard Lionel-Boulet Varennes, Québec J3X 1S2, Canada.
authors.forename: Qingzhe
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: School of Environmental Science and Engineering, Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Shanda South Road 27, Jinan 250100, P. R. China.
authors.forename: Nan
authors.initials: N
authors.lastname: Bao
authors.affiliation: State Key Laboratory of Crystal Materials, Shandong University, Shanda South Road 27, Jinan 250100, P. R. China.
authors.forename: Xinqiang
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of Environmental Science and Engineering, Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Shanda South Road 27, Jinan 250100, P. R. China.
authors.forename: Xinde
authors.initials: X
authors.lastname: Hu
authors.affiliation: School of Environmental Science and Engineering, Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Shanda South Road 27, Jinan 250100, P. R. China.
authors.forename: Xinhan
authors.initials: X
authors.lastname: Miao
authors.affiliation: Institut National de la Recherche Scientifique (INRS), Centre Énergie Materiaux et Télécommunications, Université du Québec, 1650 Boulevard Lionel-Boulet Varennes, Québec J3X 1S2, Canada.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Chaker
authors.affiliation: Institut National de la Recherche Scientifique (INRS), Centre Énergie Materiaux et Télécommunications, Université du Québec, 1650 Boulevard Lionel-Boulet Varennes, Québec J3X 1S2, Canada.
authors.forename: Dongling
authors.initials: D
authors.lastname: Ma