Construction of Hierarchically Porous Nanoparticles@Metal–Organic Frameworks Composites by Inherent Defects for the Enhancement of Catalytic Efficiency

Meng, Fanwei; Zhang, Suoying; Ma, Lu; Zhang, Weina; Li, Matthew; Wu, Tianpin; Li, Hang; Zhang, Tao; Lü, Xiaohua; Huo, Fengwei; Lü, Jun

doi:10.1002/adma.201803263

Cited by 100 publications

(80 citation statements)

References 34 publications

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“…Therefore, defects in QDs can be considered as a double‐edge sword for photocatalysis. How to better control the relationship between defects and catalytic activity is a hot topic in the research field, which has been systematically discussed elsewhere . Till now, many methods of designedly introducing defects into QDs have been reported, which make the defect effects more controllable and lay a good foundation for the further applications.…”

Section: Semiconductor Qds For Co2 Photoreductionmentioning

confidence: 99%

Semiconductor Quantum Dots: An Emerging Candidate for CO₂ Photoreduction

et al. 2019

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As one of the most critical approaches to resolve the energy crisis and environmental concerns, carbon dioxide (CO2) photoreduction into value‐added chemicals and solar fuels (for example, CO, HCOOH, CH3OH, CH4) has attracted more and more attention. In nature, photosynthetic organisms effectively convert CO2 and H2O to carbohydrates and oxygen (O2) using sunlight, which has inspired the development of low‐cost, stable, and effective artificial photocatalysts for CO2 photoreduction. Due to their low cost, facile synthesis, excellent light harvesting, multiple exciton generation, feasible charge‐carrier regulation, and abundant surface sites, semiconductor quantum dots (QDs) have recently been identified as one of the most promising materials for establishing highly efficient artificial photosystems. Recent advances in CO2 photoreduction using semiconductor QDs are highlighted. First, the unique photophysical and structural properties of semiconductor QDs, which enable their versatile applications in solar energy conversion, are analyzed. Recent applications of QDs in photocatalytic CO2 reduction are then introduced in three categories: binary II–VI semiconductor QDs (e.g., CdSe, CdS, and ZnSe), ternary I–III–VI semiconductor QDs (e.g., CuInS2 and CuAlS2), and perovskite‐type QDs (e.g., CsPbBr3, CH3NH3PbBr3, and Cs2AgBiBr6). Finally, the challenges and prospects in solar CO2 reduction with QDs in the future are discussed.

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Section: Semiconductor Qds For Co2 Photoreductionmentioning

confidence: 99%

Semiconductor Quantum Dots: An Emerging Candidate for CO₂ Photoreduction

et al. 2019

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“…Thanks to their permanent porosity and appealing structures, metal organic frameworks (MOFs) have found diverse applications in gas adsorption [1], separation [2], drug delivery [3], catalysis [4], etc. Their large internal surface area offers an ideal platform for the stabilization of functional nanoparticles (NPs) [5], and the accommodated NPs on MOFs create additional active sites for the catalytic reactions [6][7][8]. Successful examples of such kind include Pd/UiO-66, Pt/MIL-101, Pt/ZiF-8, TiO2/ZIF-8, CdS/UiO-66(NH2), MoS2/PBA, etc.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically porous S-scheme CdS/UiO-66 photocatalyst for efficient 4-nitroaniline reduction

Wei

Chen

Zhang

et al. 2021

Chinese Journal of Catalysis

102

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Unveiling the pore-size performance of metal organic frameworks (MOFs) is imperative for controllable design of sophisticated catalysts. Herein, UiO-66 with distinct macropores and mesopores were intentionally created and served as substrates to create advanced CdS/UiO-66 catalysts. The pore size impacted the spatial distribution of CdS nanoparticles (NPs): CdS tended to deposit on the external surface of mesoporous UiO-66, but spontaneously penetrated into the large cavity of macroporous UiO-66 nanocage. Normalized to unit amount of CdS, the photocatalytic reaction constant of macroporous CdS/UiO-66 over 4-nitroaniline reduction was ~3 folds of that of mesoporous counterpart, and outperformed many other reported state-of-art CdS-based catalysts. A confinement effect of CdS NPs within UiO-66 cage could respond for its high activity, which could shorten the electron-transport distance of NPs-MOFs-reactant, and protect the active CdS NPs from photocorrosion. The finding here provides a straightforward paradigm and mechanism to rationally fabricate advance NPs/ MOFs for diverse applications.

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“…Besides, the micelles are not stable under the synthetic conditions of most MOFs, the variety of the H‐MOFs obtained is limited. By contrast, the hard template method was developed by our group to create the mesopores in MOFs . Various metal nanoparticles, used as the hard templates, were encapsulated by MOFs and followed by the etching process to remove the templates .…”

Section: Methodsmentioning

confidence: 99%

Functional Macro‐Microporous Metal–Organic Frameworks for Improving the Catalytic Performance

Zheng

et al. 2019

Small Methods

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Constructing hierarchical pore structures in metal–organic frameworks (H‐MOFs) can significantly enhance their catalytic performance. However, common strategies for preparing H‐MOFs only focus on creating hierarchical pores to facilitate the molecular diffusion but neglect the synergistic effect of hierarchical pores with multiactive sites in H‐MOFs. Therefore, the development of a suitable strategy with hierarchical pores and multiactive sites in H‐MOFs serving as multifunctional and efficient catalysts is highly desired. In this work, a facile strategy is developed to prepare functional nanoparticles (NPs)/MOFs catalysts with a macro‐microporous structure (NPs/M‐MOFs) and multiactive sites (more NPs and base sites) through template etching and immersion reduction. The as‐prepared Pt/M‐zeolitic imidazolate framework‐8 (ZIF‐8) shows high performance in the Knoevenagel condensation−hydrogenation two‐steps catalytic reaction, mainly due to the existence of macropores in the ZIF‐8 and the exposure of the multiactive sites (more Pt NPs and base sites). This strategy is potentially extendable to other series of MOFs for structuring functional NPs/M‐MOFs catalysts that can optimize the performance of catalytic reaction.

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Construction of Hierarchically Porous Nanoparticles@Metal–Organic Frameworks Composites by Inherent Defects for the Enhancement of Catalytic Efficiency

Cited by 100 publications

References 34 publications

Semiconductor Quantum Dots: An Emerging Candidate for CO₂ Photoreduction

Semiconductor Quantum Dots: An Emerging Candidate for CO₂ Photoreduction

Hierarchically porous S-scheme CdS/UiO-66 photocatalyst for efficient 4-nitroaniline reduction

Functional Macro‐Microporous Metal–Organic Frameworks for Improving the Catalytic Performance

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Construction of Hierarchically Porous Nanoparticles@Metal–Organic Frameworks Composites by Inherent Defects for the Enhancement of Catalytic Efficiency

Cited by 100 publications

References 34 publications

Semiconductor Quantum Dots: An Emerging Candidate for CO2 Photoreduction

Semiconductor Quantum Dots: An Emerging Candidate for CO2 Photoreduction

Hierarchically porous S-scheme CdS/UiO-66 photocatalyst for efficient 4-nitroaniline reduction

Functional Macro‐Microporous Metal–Organic Frameworks for Improving the Catalytic Performance

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Semiconductor Quantum Dots: An Emerging Candidate for CO₂ Photoreduction

Semiconductor Quantum Dots: An Emerging Candidate for CO₂ Photoreduction