Citation: Xingyan Liu, Yue Li, Kaili Wu, Panpan Li, Yonggang Xu, Xiaowei Li, Junhao Zhou, Youzhou He, Min Fu, Guangming Jiang, Siping Wei. In-situ confined up-conversion Pt/CQDs within linker-defective NH₂-MIL-125 to integrate photosensitivity and conductivity for hydrogen production and NO oxidation[J]. Chinese Chemical Letters, ;2025, 36(11): 110853. doi: 10.1016/j.cclet.2025.110853 shu

In-situ confined up-conversion Pt/CQDs within linker-defective NH₂-MIL-125 to integrate photosensitivity and conductivity for hydrogen production and NO oxidation

Xingyan Liu ^{a, 1} ,
Yue Li ^{a, 1} ,
Kaili Wu ^a ,
Panpan Li ^{b, *,} ,
Yonggang Xu ^a ,
Xiaowei Li ^{c, *,} ,
Junhao Zhou ^a ,
Youzhou He ^a ,
Min Fu ^a ,
Guangming Jiang ^a ,
Siping Wei ^{d, *,}

a.
College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
b.
College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China
c.
College of Chemistry, Sichuan University, Chengdu 610064, China
d.
Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China

panpanli@scu.edu.cn

lixw@scu.edu.cn

swei1225@swmu.edu.cn

Received Date: 20 August 2024
Revised Date: 1 December 2024
Accepted Date: 14 January 2025
Available Online: 15 January 2025

Figures(4)

The linker defect engineering for MOFs is a viable strategy that usually can effectively augment conductivity to further promote charge carrier separation, which is the most excellent conductivity of preserved metal clusters. However, the partially missing photosensitive linker often leads to the diminished light utilization efficiency. As we know, in the linker defect engineering, addressing the lack of photosensitivity while maintaining outstanding conductivity is still in its infancy. In this essay, the linker-defective NH₂-MIL-125 was obtained by adding the glacial acetic acid regulator, subsequently, the excellent light-responsive Pt/CQDs with up-conversion effect was in-situ encapsulated into the enlarged pore space of linker-defective NH₂-MIL-125. It is excited that the fabricated dual-functional composite ideally integrates photosensitivity and conductivity for photocatalytic hydrogen evolution and NO elimination. The optimal Pt/CQDs@NM-125-4 exhibited very superior photocatalytic hydrogen evolution (28.75 mmol/g), it was 11.63 times as that of the initial NH₂-MIL-125 (2.47 mmol/g) and 1.4 times as that of the defective NM-125-4 (20.46 mmol/g). In addition, the excellent photocatalytic NO removal efficiency was 52.12% for Pt/CQDs@NM-125-4, whereas the original NH₂-MIL-125 only reached 30% and the defective NM-125-4 achieved 44.96%. The corresponding optical and electrical characterization based on UV–vis, up-conversion photoluminescence (UCPL), and electrochemical impedance spectroscopy (EIS) etc. demonstrated the defect engineering accelerates the charge carriers transfer via enhancing conductivity, and the in-situ confined up-conversion Pt/CQDs promote the visible light response. Our work presents a feasible avenue to integrate photosensitivity and conductivity via in-situ fabricating excellent light-responsive Pt/CQDs within linker-defective NH₂-MIL-125 for further significantly boosting photocatalytic performance
- Defect engineering,
- Photocatalysis,
- Up-conversion Pt/CQDs,
- NO removal,
- Hydrogen evolution
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

In-situ confined up-conversion Pt/CQDs within linker-defective NH2-MIL-125 to integrate photosensitivity and conductivity for hydrogen production and NO oxidation

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通讯作者: 陈斌, bchen63@163.com

In-situ confined up-conversion Pt/CQDs within linker-defective NH₂-MIL-125 to integrate photosensitivity and conductivity for hydrogen production and NO oxidation