Development of Ce-doped NH2-UiO-66(Zr) photocatalysts for efficient CO2 reduction in an aqueous system

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL Chemical Engineering Journal Pub Date : 2024-09-24 DOI:10.1016/j.cej.2024.156088

Chao Yu, Xianjin Zhang, Chenxu Song, Yanna Wang, Jing Lin, Zhonglu Guo, Yujie Zhang, Zhenya Liu, Chunsheng Li, Yan Sun, Chengchun Tang, Yang Huang

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Abstract

A series of bimetallic NH2-UiO-66(Zr/Ce) catalysts with varying Zr/Ce molar ratios were synthesized using a straightforward solvothermal method. Among the tested samples, NH2-UiO-66(Zr/Ce1:1) demonstrated superior performance, attributed to its optimized electronic structure, enhanced CO2 adsorption capacity, and efficient separation of photogenerated electron-hole pairs, outperforming the NH2-UiO-66(Zr) variant. The NH2-UiO-66(Zr/Ce1:1) exhibited a bandgap of 2.67 eV, CO2 adsorption capacity of 65.85 cm3/g, and a photocurrent density of 0.43 μA·cm−2. This catalyst achieved achieving a CO production rate of 30.04 μmol·g−1·h−1, representing a 1.66-fold improvement over NH2-UiO-66(Zr), with CO selectivity increasing from 95.2 % to 97.2 %. The results underscore the efficacy of Zr/Ce bimetallic NH2-UiO-66 for CO2 reduction, highlighting the potential of structural modifications in NH2-UiO-66 to enhance photocatalytic performance. This study provides valuable insights into the design and development of advanced catalysts for efficient and sustainable CO2 reduction.

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开发掺杂 Ce 的 NH2-UiO-66(Zr)光催化剂，用于在水体系中高效还原 CO2

采用直接溶热法合成了一系列不同 Zr/Ce 摩尔比的双金属 NH2-UiO-66(Zr/Ce)催化剂。在测试的样品中，NH2-UiO-66(Zr/Ce1:1)表现出了优越的性能，这归功于其优化的电子结构、增强的二氧化碳吸附能力以及光生电子-空穴对的高效分离，其性能优于 NH2-UiO-66(Zr)变体。NH2-UiO-66(Zr/Ce1:1) 的带隙为 2.67 eV，二氧化碳吸附容量为 65.85 cm3/g，光电流密度为 0.43 μA-cm-2。与 NH2-UiO-66(Zr)相比，该催化剂的二氧化碳生产率提高了 1.66 倍，达到 30.04 μmol-g-1-h-1，二氧化碳选择性从 95.2% 提高到 97.2%。这些结果表明了 Zr/Ce 双金属 NH2-UiO-66 在还原二氧化碳方面的功效，同时也凸显了对 NH2-UiO-66 进行结构修饰以提高其光催化性能的潜力。这项研究为设计和开发用于高效和可持续还原二氧化碳的先进催化剂提供了宝贵的见解。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.