Synergistic effect of hierarchical structure and S-scheme heterojunction over O-doped g-C3N4/N-doped Nb2O5 for highly efficient photocatalytic CO2 reduction
Qaraah, Fahim A. Mahyoub, Samah A. Hezam, Abdo Qaraah, Amjad Xin, Feng Xiu, Guangli
Synergistic effect of hierarchical structure and S-scheme heterojunction over O-doped g-C3N4/N-doped Nb2O5 for highly efficient photocatalytic CO2 reduction
Qaraah, Fahim A. 1Mahyoub, Samah A. 1Hezam, Abdo 2Qaraah, Amjad 3Xin, Feng 3Xiu, Guangli1
扫码查看
点击上方二维码区域，可以放大扫码查看
作者信息
1. East China Univ Sci & Technol
2. Univ Rostock
3. Tianjin Univ
折叠
Abstract
Reasonable construction and engineering of optimal hierarchical photocatalysts have garnered great attention in terms of promoting CO2 photoreduction into fuel production. Herein, we introduce a novel 3D O-doped g-C3N4/N-doped Nb2O5 (OCNNb) S-scheme heterojunction fabricated using control of each material's surface charge-induced heteroaggregation for photocatalytic CO2 reduction (PCR). The optimized sample converts CO2 with substantially greater rates (the sum production rate of CO and CH4) than the blank control, i.e., O-doped g-C3N4 (OCN) and N-doped Nb2O5 (NNBO). The enhanced photocatalytic efficiency can not only be ascribed to the prevention of photogenerated charge carrier recombination mediated by the S-scheme heterojunction but also to the high specific surface areas and abundance of active sites. In the meantime, work function measurement, in situ irradiated, X-ray photoelectron spectroscopy and electron paramagnetic resonance (EPR) studies confirm the S-scheme photogenerated charge transfer mechanism. This study offers a useful approach for fabricating extremely effective heterojunction photocatalysts to convert solar fuels.
Key words
3D nanostructures/O-doped g-C3N4/N-doped Nb2O5/S-scheme heterojunctions/CO2 photoreduction/G-C3N4/NB2O5 HETEROSTRUCTURES/DRIVEN/CONVERSION/MICROSPHERES/DEGRADATION/PERFORMANCE/POLLUTANTS/REMOVAL
NSTL
Elsevier