光催化
羟甲基
纳米线
催化作用
硫化镉
糠醛
氧气
化学工程
材料科学
光化学
化学
无机化学
纳米技术
有机化学
工程类
作者
Jeongeun Kim,Ji‐Won Choi,Nurwarrohman Andre Sasongko,Myeongkee Park,Myung Jong Kang,Hyun Sung Kim
标识
DOI:10.1002/adsu.202300102
摘要
Abstract 5‐Hydroxymethyl furfural (HMF) obtained from biomass can be converted to 2,5‐diformylfuran (DFF), a valuable chemical intermediate. However, the typical HMF oxidation process requires energy consumption such as high temperature and oxygen pressure. Herein, Au 2 S decorated CdS nanowires (denoted as Au 2 S@CdS NWs) are fabricated by a simple ion exchange method and applied as a heterostructure photocatalyst system for HMF oxidation under mild conditions. Under visible light irradiation, the photocatalytic performance of Au 2 S@CdS NWs is significantly enhanced compared with pristine CdS NWs, in which Au 2 S (0.25%)@CdS NWs achieve the high DFF yield (≈95%) for 4 h reaction time. This result means that the heterogeneous interface formed between CdS NWs and Au 2 S promotes the separation efficiency of photogenerated charges, which leads to high catalytic activity. Moreover, Au 2 S (0.25%)@CdS NWs work well for HMF conversion to DFF under anaerobic and aerobic conditions. Control experiments and characterization are conducted to investigate each reaction mechanism. Consequently, it is found that the photogenerated hole directly oxidizes HMF to DFF under anaerobic conditions and the 1 O 2 produced from oxygen is the active species for HMF conversion to DFF under aerobic conditions.
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