Visible-Light-Driven Furfural Oxidation over CuOx/Nb2O5

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2023-09-29 DOI:10.1002/asia.202300732

Puning Ren, Yue Zhou, Kaiyi Su, Lulu Sun, Dr. Nengchao Luo, Prof. Feng Wang

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Abstract

Maleic anhydride (MA) is an important polyester monomer that can be produced from oxidizing renewable furfural derived from biomass. However, MA generation from furfural requires harsh reaction conditions, and suffers from low efficiency and solvent corrosion. Herein, we design a Nb₂O₅ photocatalyst loaded of highly dispersed CuO_x (CuO_x/Nb₂O₅), which selectively catalyzes furfural oxidation to MA and the precursor (5-hydroxy-2(5H)-furanone, HF). Due to CuO_x loading and forming a complex of ligand to metal charge transfer (LMCT) between the Nb₂O₅ surface and adsorbed furfural, the CuO_x/Nb₂O₅ absorbs visible light to activate furfural though Nb₂O₅ has a large band-gap energy (3.2 eV). Singlet oxygen (¹O₂) is the key active species for C−C bond cleavage and CO generation. MA and HF is produced with a combined yield of 59 % under optimized conditions. This work provides a mild way to provide renewable maleic anhydride via oxidative C−C bond cleavage.

Abstract Image

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可见光下CuOx/Nb2O5光催化氧化糠醛。

马来酸酐（MA）是一种重要的聚酯单体，可由生物质衍生的可再生糠醛氧化制备。然而，糠醛生成MA需要苛刻的反应，并且效率低和溶剂腐蚀。在此，我们设计了一种负载高度分散的CuOx的Nb2O5光催化剂（CuOx/Nb2O5），其选择性催化糠醛氧化为MA和前体（5-羟基-2（5H）-呋喃酮，HF）。由于CuOx负载并在Nb2O5表面和吸附的糠醛之间形成配体-金属电荷转移（LMCT）的络合物，CuOx/Nb2O5吸收可见光以活化糠醛，尽管Nb2O5具有大的带隙能量（3.2eV）。单线态氧（1O2）是C-C键断裂和CO生成的关键活性物质。在优化的条件下以59%的总产率生产MA和HF。这项工作提供了一种通过氧化C-C键断裂提供可再生马来酸酐的温和方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).