王浩存, 刘令涛, 卞俊杰, 李春虎. Er掺杂增强K-C3N4/UiO-66-NH2的光生载流子转移用于糠醛高效光催化氧化制糠酸[J]. 燃料化学学报(中英文). DOI: 10.1016/S1872-5813(24)60469-X
引用本文: 王浩存, 刘令涛, 卞俊杰, 李春虎. Er掺杂增强K-C3N4/UiO-66-NH2的光生载流子转移用于糠醛高效光催化氧化制糠酸[J]. 燃料化学学报(中英文). DOI: 10.1016/S1872-5813(24)60469-X
WANG Haocun, LIU Lingtao, BIAN Junjie, LI Chunhu. Enhancing photo-generated carriers transfer of K-C3N4/UiO-66-NH2 with Er doping for efficient photocatalytic oxidation of furfural to furoic acid[J]. Journal of Fuel Chemistry and Technology. DOI: 10.1016/S1872-5813(24)60469-X
Citation: WANG Haocun, LIU Lingtao, BIAN Junjie, LI Chunhu. Enhancing photo-generated carriers transfer of K-C3N4/UiO-66-NH2 with Er doping for efficient photocatalytic oxidation of furfural to furoic acid[J]. Journal of Fuel Chemistry and Technology. DOI: 10.1016/S1872-5813(24)60469-X

Er掺杂增强K-C3N4/UiO-66-NH2的光生载流子转移用于糠醛高效光催化氧化制糠酸

Enhancing photo-generated carriers transfer of K-C3N4/UiO-66-NH2 with Er doping for efficient photocatalytic oxidation of furfural to furoic acid

  • 摘要: 生物质衍生的平台分子如糠醛是一种丰富、可再生的化工原料,可被转化为高值化学品。在糠醛转化为高值化学品的过程中,制备可见光响应的高效选择氧化光催化剂至关重要。本研究采用直接水热法合成了Er@K-C3N4/UiO-66-NH2催化剂,在糠醛光催化氧化制备糠酸的反应中表现出优异的催化活性。对催化剂进行了充分的表征,证实Er@K-C3N4/UiO-66-NH2催化剂的带隙被有效调控。反应条件优化后,糠醛的转化率达到89.3%,相应的糠酸产率为79.8%。ESR测试和活性氧物种捕获实验的结果表明,反应过程中的主要活性氧物种为·O2 。Er和K的掺杂提高了催化剂的光生载流子转移速率,从而提高了光生电子-空穴对的分离效率。本研究拓展了稀土元素掺杂g-C3N4在糠醛光催化选择性氧化中的潜在应用。

     

    Abstract: Biomass-derived platform molecules, such as furfural, are abundant and renewable feedstock for valuable chemical production. It is critical to synthesize highly efficient photocatalysts for selective oxidation under visible light. The Er@K-C3N4/UiO-66-NH2 catalyst was synthesized using a straight-forward hydrothermal technique, and exhibited exceptional efficiency in the photocatalytic oxidation of furfural to furoic acid. The catalyst was thoroughly characterized, confirming the effective adjustment of the band gap energy of Er@K-C3N4/UiO-66-NH2. Upon the optimized reaction conditions, the conversion rate of furfural reached 89.3%, with a corresponding yield of furoic acid at 79.8%. The primary reactive oxygen species was identified as ·O2 from ESR spectra and scavenger tests. The incorporation of Er and K into the catalyst enhanced the photogenerated carriers transfer rate, hence increasing the separating efficiency of photogenerated electron-hole pairs. This study expands the potential applications of rare earth element doped g-C3N4 in the photocatalytic selective oxidation of furfurans.

     

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