Synthesis of vanadium doped tantalum oxy-nitride for photocatalytic reduction of carbon dioxide under visible light
2018; Elsevier BV; Volume: 467-468; Linguagem: Inglês
10.1016/j.apsusc.2018.10.260
ISSN1873-5584
AutoresNguyễn Thị Phương Lệ, Nguyen Thi Dieu Cam, Doan Van Thuan, Thanh Tam Truong, Nguyễn Thị Thanh Trúc, Cao Van Hoang, Thi Thu Phuong Tran, Thanh-Dong Pham, Mai Hùng Thanh Tùng, Nguyễn Thị Minh Thư, Nguyen Minh Phuong, Van Noi Nguyen,
Tópico(s)CO2 Reduction Techniques and Catalysts
ResumoWe successfully used V as dopant to enhance activity of TaON for visible light photocatalytic reduction of CO2 into valuable fuels. We investigated that the used V dopants existed in the TaON lattice and replaced several Ta elements in the lattice leading to decrease in the conduction band minimum and increase in the valence band maximum of the prepared VTaON. Hence, the band gap energy of the prepared VTaON was lower than that of prepared TaON or the prepared VTaON material could absorb significant amount of incident visible light for production of e− and h+ pairs, which participated in reactions with CO2 and H2O to generate CH4, CO, O2 and H2. We also investigated that the optimal V/Ta ratio (or optimal amount of V dopant) for maximum enhancing photocatalytic activity of TaON was 1.5 wt%. The prepared 1.5VTaON visible light photocatalytically converted CO2 with H2O to generate CH4, CO, O2 and H2 with generation rates of 673, 206, 1479 and 67 (µmol·g−1cat·h−1), respectively.
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