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Sökning: WFRF:(Bi Chuanzhou)

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1.
  • Han, Yi, et al. (författare)
  • Na-mediated carbon nitride realizing CO 2 photoreduction with selectivity modulation
  • 2024
  • Ingår i: Journal of Colloid and Interface Science. - : ACADEMIC PRESS INC ELSEVIER SCIENCE. - 0021-9797 .- 1095-7103. ; 670, s. 348-356
  • Tidskriftsartikel (refereegranskat)abstract
    • The depressed directional separation of photogenerated carriers and weak CO2 adsorption/activation activity are the main factors hampering the development of artificial photosynthesis. Herein, Na ions are embedded in graphitic carbon nitride (g-C3N4) to achieve directional migration of the photogenerated electrons to Na sites, while the electron-rich Na sites enhance CO2 adsorption and activation. Na/g-C3N4 (NaCN) shows improved photocatalytic reduction activity of CO2 to CO and CH4, and under simulated sunlight irradiation, the CO yield of NaCN synthesized by embedding Na at 550 degrees C (NaCN-550) is 371.2 mu mol g-1 h-1, which is 58.9 times more than that of the monomer g-C3N4. By means of theoretical calculations and experiments including in situ fourier transform infrared spectroscopy, the mechanism is investigated. This strategy which improves carrier separation and reduces the energy barrier at the same time is important to the development of artificial photosynthesis.
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2.
  • Zhu, Xingwang, et al. (författare)
  • Stacking Engineering of Heterojunctions in Half-Metallic Carbon Nitride for Efficient CO2 Photoreduction
  • 2023
  • Ingår i: Advanced Science. - : WILEY. - 2198-3844.
  • Tidskriftsartikel (refereegranskat)abstract
    • Enhancing charge separation in semiconductor photocatalysts is a major challenge for efficient artificial photosynthesis. Herein, a compact heterojunction is designed by embedding half-metallic C(CN)(3) (hm-CN) hydrothermally in BiOBr (BOB) as the backbone. The interface between hm-CN and BOB is seamless and formed by covalent bonding to facilitate the transmission of photoinduced electrons from BOB to hm-CN. The transient photocurrents and electrochemical impedance spectra reveal that the modified composite catalyst exhibits a larger electron transfer rate. The photocatalytic activity of hm-CN/BOB increases significantly as indicated by a CO yield that is about four times higher than that of individual components. Density-functional theory calculations verify that the heterojunction improves electron transport and decreases the reaction energy barrier, thus promoting the overall photocatalytic CO2 conversion efficiency. The half-metal nitride coupled semiconductor heterojunctions might have large potential in artificial photosynthesis and related applications.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
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Ding, Penghui (2)
Wang, Bin (2)
Xu, Hui (2)
Bi, Chuanzhou (2)
Liu, Jinyuan (2)
Xu, Hangmin (2)
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Zhong, Kang (2)
Chu, Paul K. (2)
Zhu, Xingwang (2)
Song, Hao (1)
Li, Wen (1)
Han, Yi (1)
Yang, Jinman (1)
Jiang, Weiyi (1)
Yi, Jianjian (1)
Wang, Xiaozhi (1)
Ding, Jianning (1)
Tian, Jianfeng (1)
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