Enhancing CO2 photoreduction efficiency via direct Z-scheme CuS/NH2-UiO-66 heterojunction with high selectivity of CO2 to CO

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-04-24 DOI:10.1016/j.jssc.2025.125398

Yu-Jie Zhang , Xue-Qing Jiang , Ming-Jiao Jiang , Wen-Wen Dong , Jun Zhao , Dong-Sheng Li

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Abstract

The exceptional redox characteristics and efficient photoinduced charge carrier transfer in heterostructures play a pivotal role in enhancing photocatalytic performance. In this study, we developed a precisely engineered direct Z-scheme heterojunction through the in situ solvothermal synthesis of CuS on the textured surface of NH₂-UiO-66. This strategic integration of the highly photosensitive CuS with NH₂-UiO-66 not only maximizes visible light harvesting but also facilitates interfacial electron transfer at the semiconductor-MOF junction, effectively suppressing photo-corrosion while dramatically boosting the CO₂ photoreduction capability. Comprehensive characterization revealed robust interfacial coupling between NH₂-UiO-66 and the deposited CuS nanoparticles. The optimized CuS/NH₂-UiO-66-3 heterostructure demonstrated outstanding photocatalytic performance, achieving a CO evolution rate of 208.7 μmol g⁻¹ during 4 h of illumination with nearly perfect CO selectivity (∼100 %), surpassing the performance of pristine NH₂-UiO-66 (62.5 μmol g⁻¹) and CuS (13.4 μmol g⁻¹). This synergetic effect may pave the way for the rational construction of new highly efficient MOF-based heterogeneous photocatalysts.

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通过直接Z-scheme cu /NH2-UiO-66异质结提高CO2光还原效率，具有CO2对CO的高选择性

异质结构中优异的氧化还原特性和高效的光诱导载流子转移对提高光催化性能起着关键作用。在这项研究中，我们通过在nh2 - uuo -66的织构表面原位溶剂热合成cu，开发了一个精确工程的直接z型异质结。这种高光敏CuS与NH2-UiO-66的战略集成不仅最大限度地提高了可见光收集，而且促进了半导体- mof结的界面电子转移，有效地抑制了光腐蚀，同时显着提高了CO2光还原能力。综合表征表明nh2 - uuo -66与沉积的cu纳米颗粒之间存在强大的界面耦合。优化后的cu /NH2-UiO-66-3异质结构表现出优异的光催化性能，在4 h的光照下，CO的析出率为208.7 μmol g−1，CO选择性接近完美（~ 100%），超过了原始的NH2-UiO-66 （62.5 μmol g−1）和cu （13.4 μmol g−1）。这种协同效应为合理构建新型高效mof基非均相光催化剂铺平了道路。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.