光催化
材料科学
剥脱关节
范德瓦尔斯力
金属
兴奋剂
煅烧
Atom(片上系统)
化学工程
化学气相沉积
纳米技术
镍
蒸汽压
催化作用
石墨烯
化学
分子
光电子学
有机化学
冶金
计算机科学
工程类
嵌入式系统
作者
Lei Ma,Rongfeng Guan,Wei Kang,Zhe Sun,Huimin Li,Qiurong Li,Qianqian Shen,Chaoqiu Chen,Xuguang Liu,Husheng Jia,Jinbo Xue
标识
DOI:10.1016/j.jcis.2024.01.023
摘要
Single-atom photocatalysts can modulate the utilization of photons and facilitate the migration of photogenerated carriers. However, the preparation of single-atom uniformly doped photocatalysts is still a challenging topic. Herein, we propose the preparation of Ni single-atom doped g-C3N4 photocatalysts by metal vapor exfoliation. The Ni vapor produced by calcining nickel foam at high temperature accumulates in between g-C3N4 layers and poses a certain vapor pressure to destroy the interlayer van der Waals forces of g-C3N4. Individual metal atoms are doped into the structure while exfoliating g-C3N4 into nanosheets by metal vapor. Upon optimization of Ni content, the Ni single atom doped g-C3N4 nanosheets with 2.81 wt% Ni exhibits the highest CO2 reduction performance in the absence of sacrificial agents. The generation rates of CO and CH4 are 19.85 and 1.73 μmol g−1h−1, respectively. The improved photocatalytic performance is attributed to the anchoring Ni of single atoms on g-C3N4 nanosheets, which increases both carrier separation efficiency and reaction sites. This work provides insight into the design of photocatalysts with highly dispersed single-atom.
科研通智能强力驱动
Strongly Powered by AbleSci AI