Metal-free g-C_3N_4 is widely used in photocatalytic reactions owing to its suitable band structure.However, it has low specific surface area and insufficient absorbance for visible light, and its photoexcited carrier...Metal-free g-C_3N_4 is widely used in photocatalytic reactions owing to its suitable band structure.However, it has low specific surface area and insufficient absorbance for visible light, and its photoexcited carriers have high recombination rates. In this study, the 3 D macropore C-vacancy g-C_3N_4 was prepared through a facile one-step route. Polymethylmethacrylate is used as a template to increase the surface reaction sites of g-C_3N_4 and extend its visible-light range. Compared to unmodified g-C_3N_4, the H2 production and CO_2 reduction rates of the fabricated g-C_3N_4 significantly improved. The special pore structure significantly improved the light utilization efficiency of g-C_3N_4 and increased the number of surface-active sites. The introduction of C-vacancy extended the absorption band of visible-light and suppressed the carrier recombination. The newly developed synthesis strategy can improve solar energy conversion efficiency and potentially modifies g-C_3N_4.展开更多
As a visible-light response photocatalyst,BiVO_(4)is widely used in photocatalytic oxygen evolution.In this study,a novel BiVO_(4)-Bi_(6)O_(6)(OH)_(3)(NO_(3))_(3)(BBN)heterostructure fabricates via a simple one-pot hy...As a visible-light response photocatalyst,BiVO_(4)is widely used in photocatalytic oxygen evolution.In this study,a novel BiVO_(4)-Bi_(6)O_(6)(OH)_(3)(NO_(3))_(3)(BBN)heterostructure fabricates via a simple one-pot hydrothermal approach is certified to effectively restrain the recombination of carriers by efficient spatial charge separation.By employing BBN as a reductive-function photocatalyst,a solid-state Z-scheme is constructed to improve the photo-redox capacity of BiVO_(4)and hydrogen production is realized in the BiVO_(4)-BBN heterostructure for the first time.The solid-state Z-scheme introduced in the BiVO_(4)-BBN ensures the photoexcited carriers with the powerful redox capacity to participate in the photocatalytic reaction.展开更多
基金financial support from the National Natural Science Foundation of China (51862023, 51662030, 21868016)the Natural Science Foundation of Jiangxi Province (20171BAB206014, 2018BCD40004)。
文摘Metal-free g-C_3N_4 is widely used in photocatalytic reactions owing to its suitable band structure.However, it has low specific surface area and insufficient absorbance for visible light, and its photoexcited carriers have high recombination rates. In this study, the 3 D macropore C-vacancy g-C_3N_4 was prepared through a facile one-step route. Polymethylmethacrylate is used as a template to increase the surface reaction sites of g-C_3N_4 and extend its visible-light range. Compared to unmodified g-C_3N_4, the H2 production and CO_2 reduction rates of the fabricated g-C_3N_4 significantly improved. The special pore structure significantly improved the light utilization efficiency of g-C_3N_4 and increased the number of surface-active sites. The introduction of C-vacancy extended the absorption band of visible-light and suppressed the carrier recombination. The newly developed synthesis strategy can improve solar energy conversion efficiency and potentially modifies g-C_3N_4.
基金the National Natural Science Foundation of China(Nos.51862023,51662030 and 21868016)the Natural Science Foundation of Jiangxi Province(No.20171BAB206014)。
文摘As a visible-light response photocatalyst,BiVO_(4)is widely used in photocatalytic oxygen evolution.In this study,a novel BiVO_(4)-Bi_(6)O_(6)(OH)_(3)(NO_(3))_(3)(BBN)heterostructure fabricates via a simple one-pot hydrothermal approach is certified to effectively restrain the recombination of carriers by efficient spatial charge separation.By employing BBN as a reductive-function photocatalyst,a solid-state Z-scheme is constructed to improve the photo-redox capacity of BiVO_(4)and hydrogen production is realized in the BiVO_(4)-BBN heterostructure for the first time.The solid-state Z-scheme introduced in the BiVO_(4)-BBN ensures the photoexcited carriers with the powerful redox capacity to participate in the photocatalytic reaction.
