光激发
光催化
贵金属
X射线光电子能谱
催化作用
光化学
价(化学)
密度泛函理论
材料科学
分解水
电子转移
兴奋剂
金属
可见光谱
价带
化学工程
析氧
带隙
化学
物理化学
计算化学
电极
光电子学
电化学
原子物理学
激发态
有机化学
冶金
生物化学
工程类
物理
作者
Ping Qiu,Yue Yao,Shuxiang Lu,Lungang Chen,Yanyan Chen,Xiaoyuan Liao
出处
期刊:Fuel
[Elsevier]
日期:2023-11-01
卷期号:351: 129043-129043
被引量:2
标识
DOI:10.1016/j.fuel.2023.129043
摘要
Photocatalytic H2 evolution and selective oxidation of Hydroxymethylfurfura (HMF) occur in synergy, which improves the utilization of photogenerated carriers. In this paper, Ti-MOFs with noble metal (NM) co-doping was used in the H2 evolution and HMF oxidation to prepare a highly efficient photocatalyst. Under visible light irradiation, the formation rate of H2 and 2,5-dicarbonylfuran (DFF) was significantly increased by 4.03 times and 4.65 times compared with the original Ti-MOF. In this process, the separation of photoexcited electrons (e−) and holes (h+) is promoted and both e− and h+ are effectively utilized. From the density functional theory (DFT) calculations and XPS spectra results, it can be seen that the e− generated by the photoexcitation of Ti-MOF will transfer spontaneously to Pt, promoting the utilization of e−. The catalysts are effect for different biomass substrates as well. This work improves separation of the photo-induced carriers and enhances the oxidation ability by adjusting the valence band of metal loading, providing a new research direction for the evolution H2 in the conversion of HMF to DFF.
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