首页|Ag-induced anatase-rutile TiO2?x heterojunction facilitating the photogenerated carrier separation in visible-light irradiation
Ag-induced anatase-rutile TiO2?x heterojunction facilitating the photogenerated carrier separation in visible-light irradiation
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NSTL
Elsevier
? 2022Nanocomposites Ag-TiO2?x have been fabricated simply by Ag+ ion exchange of H2Ti3O7 nanowires. Ag NPs, appearing on the catalyst surface, exhibit strong visible-light absorption and generate hot electrons due to their localized surface plasmon resonance. Moreover, Ag introduction leads to the generation of anatase-rutile biphase heterojunction with Ti3+ defect energy level, narrowing the bandgap to 2.85 eV and inhibiting the recombination of electron-hole pairs, thus facilitating photocatalytic reduction of Cr (VI) under visible light. A possible photocatalytic reduction mechanism, i. e., the synergistic effect of the Ti3+ defect energy level, anatase-rutile heterojunction and SPR effect of Ag nanoparticles, has also been proposed.
Li J.、Jin Z.、Ma A.、Gui J.、Zhang Y.、Liu D.、Sun Y.、Li X.、Cai Q.
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State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process Engineering and School of Chemical Engineering and Technology Tiangong University
School of Material Science and Technology Tiangong University
School of Chemistry Tiangong University
CNOOC CenerTech Tianjin Chemical Research and Design Institute Co. Ltd.
NSTL
Elsevier
