氮气
空位缺陷
异质结
氧气
带隙
光化学
析氧
辐照
材料科学
可见光谱
光催化
化学
催化作用
光电子学
物理化学
结晶学
电化学
有机化学
电极
核物理学
物理
作者
Deliang Zhang,Yen Leng Pak,Xiaoyin Li,Shuhua Lv,Miaomiao Xing,Zhen Yang,Hongmin Wu,Xing Gao,Hongyu Mou,Jibin Song
标识
DOI:10.1016/j.jallcom.2023.172881
摘要
In order to achieve efficient development of green and sustainable industries and improve energy efficiency, the growth of highly efficient catalysts with photoresponse from ultraviolet (UV) to near-infrared (NIR) region is of great significance for the reduction of nitrogen to ammonia. Herein, we reported binary nanohybrids composed of nitrogen vacancy-rich two dimensional (2 D) g-C3N4 and oxygen vacancy-rich 2 D BiO2−x (CN/BiO). Both experimental results and DFT calculations indicated that the synergistic effect of the heterostructure in CN/BiO effectively suppresses the recombination of photogenerated electron-hole pairs. Advancing from the efficient charge separation, N2 adsorbed on the nitrogen vacancy and oxygen vacancy sites can effectively receive high-energy electrons, which in turn promote NH3 production. Impressively, the CN/BiO exhibited remarkable ammonia yield rate of 602.1 μmol g−1 h−1 with > 420 nm light irradiation. More crucially, superior activity under NIR light was indeed accomplished for CN/BiO with the NH3 production rates up to 89.4 μmol g−1 h−1 using > 780 nm light irradiation. This study provided a novel synthetic route to prepare highly active and full-spectrum light-driven heterojunction photocatalysts toward sustainable and scalable solar-to-NH3 production.
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