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Research Article

Bifunctional core–shell co-catalyst for boosting photocatalytic CO2 reduction to CH4

Fangxu Dai1, Mingming Zhang1, Jishu Han1( ), Zhenjiang Li2, Shouhua Feng1, Jun Xing1( ), Lei Wang1,3( )
Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
College of Environment and Safety Engineering, Qingdao University of Science and Technology, Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, Qingdao 266042, China
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Graphical Abstract

Herein, an all-in-one functional absorbable sponges (HCNPs) with hemostatic effect was constructed by integrating PP-Dox/Lap (doxorubicin (Dox) and lapatinib (Lap) synergistic delivery nanoparticles) into thiolated hyaluronic acid (HA-SH) and collagen I cross-linked hydrogel for effective preventing post-resection recurrence as well as distant metastasis. The functional HCNPs sponge might provide a safer and more effective strategy for postoperative treatment of cancer.

Abstract

Solar-light-driven CO2 reduction CO to CH4 and C2H6 is a complex process involving multiple elementary reactions and energy barriers. Therefore, achieving high CH4 activity and selectivity remains a significant challenge. Here, we integrate bifunctional Cu2O and Cu-MOF (MOF = metal-organic framework) core–shell co-catalysts (Cu2O@Cu-MOF) with semiconductor TiO2. Experiments and theoretical calculations demonstrate that Cu2O (Cu+ facilitates charge separation) and Cu-MOF (Cu2+ improves the CO2 adsorption and activation) in the core–shell structure have a synergistic effect on photocatalytic CO2 reduction, reducing the formation barrier of the key intermediate *COOH and *CHO. The photocatalyst exhibits high CH4 yield (366.0 μmol·g−1·h−1), efficient electron transfer (3283 μmol·g−1·h−1) and hydrocarbon selectivity (95.5%), which represents the highest activity of Cu-MOF-based catalysts in photocatalytic CO2 reduction reaction. This work provides a strategy for designing efficient photocatalysts from the perspective of precise regulation of components.

Keywords

bifunctionalco-catalystcore–shellphotocatalyticCO2 reduction

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Nano Research
Volume 17 Issue 3,
March 2024
Pages 1259-1266
DOI: 10.1007/s12274-023-6107-y
Cite this article:
Dai F, Zhang M, Han J, et al. Bifunctional core–shell co-catalyst for boosting photocatalytic CO2 reduction to CH4. Nano Research, 2024, 17(3): 1259-1266. https://doi.org/10.1007/s12274-023-6107-y
Topics:
Photocatalysis

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Received: 28 May 2023
Revised: 12 August 2023
Accepted: 16 August 2023
Published: 14 October 2023
© Tsinghua University Press 2023
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