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g-C3N4 nanosheets coupled with CoSe2 as co-catalyst for efficient photooxidation of xylose to xylonic acid

文献类型： 外文期刊

作者： Hao, Qi 1 ; Liu, Yijun 1 ; Zou, Ren 1 ; Shi, Ge 1 ; Yang, Shilian 1 ; Zhong, Linxin 1 ; Yang, Wu 1 ; Chi, Xiao 3 ; Liu, Yunpeng 5 ; Admassie, Shimelis 6 ; Peng, Xinwen 1 ;

作者机构： 1.South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510641, Guangdong, Peoples R China

2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Hainan Key Lab Storage & Proc Fruits & Vegetables, Zhanjiang 524001, Guangdong, Peoples R China

3.Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore

4.Natl Univ Singapore, Ctr Adv 2D Mat CA2DM, 3 Sci Dr 3, Singapore 117543, Singapore

5.Foshan Univ, Sch Mat Sci & Hydrogen Energy, Foshan 528231, Guangdong, Peoples R China

6.Addis Ababa Univ, Dept Chem, POB 1176, Addis Ababa, Ethiopia

关键词： Biomass photooxidation; Hemicelluloses; Xylose; g-C3N4; Xylonic acid

期刊名称：GREEN ENERGY & ENVIRONMENT （ 影响因子：14.6； 五年影响因子：12.4 ）

ISSN： 2096-2797

年卷期： 2025 年 10 卷 1 期

页码：

收录情况： SCI

摘要： Photocatalysis has emerged as an effective approach to sustainably convert biomass into value-added products. CoSe2 is a promising non-precious, efficient cocatalyst for photooxidation, which can facilitate the separation of photogenerated electron-holes, increase the reaction rates, and enhance photocatalytic efficiency. In this work, we synthesized a stable and efficient photocatalysis system of CoSe2/g-C3N4 through attaching CoSe2 on g-C3N4 sheets, with a yield of 50.12% for the selective photooxidation of xylose to xylonic acid. Under light illumination, the photogenerated electrons were prone to migrating from g-C3N4 to CoSe2 due to the higher work function of CoSe2, resulting in the accelerated separation of photogenerated electron-holes and the promoted photooxidation. Herein, this study reveals the unique function of CoSe2, which can significantly promote oxygen adsorption, work as an electron sink and accelerate the generation of center dot O-2, thereby improving the selectivity toward xylonic acid over other by-products. This work provides useful insights into the design of selective photocatalysts by engineering g-C3N4 for biomass high-value utilization. (c) 2025 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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