1
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Le Huec T, López-Francés A, Abánades Lázaro I, Navalón S, Baldoví HG, Giménez-Marqués M. Heteroepitaxial MOF-on-MOF Photocatalyst for Solar-Driven Water Splitting. ACS NANO 2024; 18:20201-20212. [PMID: 39075870 PMCID: PMC11308772 DOI: 10.1021/acsnano.4c03442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 07/17/2024] [Accepted: 07/17/2024] [Indexed: 07/31/2024]
Abstract
Assembly of different metal-organic frameworks (MOFs) into hybrid MOF-on-MOF heterostructures has been established as a promising approach to develop synergistic performances for a variety of applications. Here, we explore the performance of a MOF-on-MOF heterostructure by epitaxial growth of MIL-88B(Fe) onto UiO-66(Zr)-NH2 nanoparticles. The face-selective design and appropriate energy band structure alignment of the selected MOF constituents have permitted its application as an active heterogeneous photocatalyst for solar-driven water splitting. The composite achieves apparent quantum yields for photocatalytic overall water splitting at 400 and 450 nm of about 0.9%, values that compare much favorably with previous analogous reports. Understanding of this high activity has been gained by spectroscopic and electrochemical characterization together with scanning transmission and transmission electron microscopy (STEM, TEM) measurements. This study exemplifies the possibility of developing a MOF-on-MOF heterostructure that operates under a Z-scheme mechanism and exhibits outstanding activity toward photocatalytic water splitting under solar light.
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Affiliation(s)
- Thibaut Le Huec
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, C/Catedrático José Beltrán Martínez,
2, 46980 Paterna, Valencia, Spain
| | - Antón López-Francés
- Departamento
de Química, Universitat Politècnica
de València, C/Camino
de Vera, s/n, 46022 Valencia, Spain
| | - Isabel Abánades Lázaro
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, C/Catedrático José Beltrán Martínez,
2, 46980 Paterna, Valencia, Spain
| | - Sergio Navalón
- Departamento
de Química, Universitat Politècnica
de València, C/Camino
de Vera, s/n, 46022 Valencia, Spain
| | - Herme G. Baldoví
- Departamento
de Química, Universitat Politècnica
de València, C/Camino
de Vera, s/n, 46022 Valencia, Spain
| | - Mónica Giménez-Marqués
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, C/Catedrático José Beltrán Martínez,
2, 46980 Paterna, Valencia, Spain
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2
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Qiu G, He W, Yao G, Feng C, Zhang H, Ma J, Wang Y. CuNi alloy anchored on dual-substrate TiO x/N-doped carbon nanofibers as a bifunctional electrocatalyst for rechargeable zinc-air batteries. J Colloid Interface Sci 2024; 675:1021-1031. [PMID: 39003815 DOI: 10.1016/j.jcis.2024.07.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Revised: 07/07/2024] [Accepted: 07/10/2024] [Indexed: 07/16/2024]
Abstract
Development of non-noble metal-based electrocatalysts to enhance the performance of zinc-air batteries (ZABs) is of great significance, but it remains a formidable challenge due to their poor stability and activity. Herein, a bifunctional CuNi-TiOx/NCNFS electrocatalyst, featuring with electron-rich copper-nickel (CuNi) alloy nanoparticles anchored on titanium oxide/N-doped carbon nanofibers (TiOx/NCNFS), is constructed by a dual-substrate loading strategy. The introduction of TiOx has led to a significant increase in the stability of the dual-substrate. The strong electronic interaction between CuNi and TiOx strengthens the anchoring of active metal sites, thus accelerating the electron transfer. Theoretical calculations unclose that NCNFS can regulate the charge distribution of TiOx, inducing the charge transfer from NCNFS → TiOx → CuNi, thereby reducing the d-band center of Cu and Ni, which is beneficial to the desorption of intermediate oxide species of the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). Therefore, CuNi-TiOx/NCNFS delivers a remarkable bifunctional performance with a low OER overpotential of 258 mV at 10 mA cm-2 and an ORR half-wave potential of 0.85 V. When assembled into ZABs, CuNi-TiOx/NCNFS shows a low potential gap of 0.64 V, a higher power density of 149.6 mW cm-2 at 330 mA cm-2, and an outstanding stability for 250 h at 5mA cm-2. This study provides a novel approach by constructing dual-substrate to tune the electronic structure of active metal sites for efficient rechargeable ZABs.
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Affiliation(s)
- Guolong Qiu
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China
| | - Wei He
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China
| | - Guangxu Yao
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China
| | - Chuanzhen Feng
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China
| | - Huijuan Zhang
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China; College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhehaote, 010022, PR China.
| | - Jinling Ma
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China
| | - Yu Wang
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China; College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhehaote, 010022, PR China.
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3
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Perfecto-Irigaray M, Beobide G, Castillo O, Allan MG, Kühnel MF, Luque A, Singh H, Yadav AK, Pérez-Yáñez S. Unravelling co-catalyst integration methods in Ti-based metal-organic gels for photocatalytic H 2 production. Dalton Trans 2024; 53:9482-9494. [PMID: 38767604 DOI: 10.1039/d4dt00880d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
The synthesis, characterization and photocatalytic hydrogen evolution reaction (HER) performance of a series of metal-organic gels (MOGs) constructed from titanium(IV)-oxo clusters and dicarboxylato linkers (benzene-1,4-dicarboxylato and 2-aminobenzene-1,4-dicarboxylato) are described. All the MOGs exhibit a microstructure comprised of metal-organic nanoparticles intertwined into a highly meso-/macroporous structure, as demonstrated by cryogenic transmission electron microscopy and gas adsorption isotherms. Comprehensive chemical characterization enabled the estimation of the complex formula for these defective materials, which exhibit low crystallinity and linker vacancies. To gain deeper insights into the local structure, X-ray absorption fine structure (XAFS) spectroscopy experiments were performed and compared to that of the analogous crystalline metal-organic framework. Additionally, the ultraviolet-visible absorption properties and optical band gaps were determined from diffuse reflectance spectroscopy data. The MOGs were studied as light absorbers for the sacrificial photocatalytic HER under simulated solar light irradiation using a platinum co-catalyst by either (1) in situ photodeposition or (2) ex situ doping process, through a post-synthetic metalation of the MOG structure. The chemical analysis of the metalation, along with high-angle annular dark-field scanning transmission electron microscopy, revealed that although the in situ addition of the co-catalyst led to greater HER rates (227 vs. 110 μmolH2 gMOG-1 h-1 for in situ and ex situ, respectively), the ex situ modification provided a finer distribution of platinum nanoparticles along the porous microstructure and, as a result, it led to a more efficient utilization of the co-catalyst (45 vs. 110 mmolH2 gPt-1 h-1).
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Affiliation(s)
- Maite Perfecto-Irigaray
- Department of Organic and Inorganic Chemistry, University of the Basque Country, UPV/EHU, P.O. 644, Bilbao E-48080, Spain.
| | - Garikoitz Beobide
- Department of Organic and Inorganic Chemistry, University of the Basque Country, UPV/EHU, P.O. 644, Bilbao E-48080, Spain.
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain
| | - Oscar Castillo
- Department of Organic and Inorganic Chemistry, University of the Basque Country, UPV/EHU, P.O. 644, Bilbao E-48080, Spain.
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain
| | - Michael G Allan
- Department of Chemistry, Faculty of Science and Engineering, Swansea University, Singleton Park, SA2 8PP Swansea, UK
- North Campus Research Complex, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Moritz F Kühnel
- Department of Chemistry, Faculty of Science and Engineering, Swansea University, Singleton Park, SA2 8PP Swansea, UK
- Institute of Chemistry, University of Hohenheim, 70593 Stuttgart, Germany.
| | - Antonio Luque
- Department of Organic and Inorganic Chemistry, University of the Basque Country, UPV/EHU, P.O. 644, Bilbao E-48080, Spain.
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain
| | - Harishchandra Singh
- Nano and Molecular Systems Research Unit, University of Oulu, Oulu FIN-90014, Finland
| | - Ashok Kumar Yadav
- Synchrotron SOLEIL, Beamline SIRIUS, Saint-Aubin, F-91192, Gif sur Yvette, France
| | - Sonia Pérez-Yáñez
- Department of Organic and Inorganic Chemistry, University of the Basque Country, UPV/EHU, P.O. 644, Bilbao E-48080, Spain.
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain
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4
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Kavun V, Uslamin E, van der Linden B, Canossa S, Goryachev A, Bos EE, Garcia Santaclara J, Smolentsev G, Repo E, van der Veen MA. Promoting Photocatalytic Activity of NH 2-MIL-125(Ti) for H 2 Evolution Reaction through Creation of Ti III- and Co I-Based Proton Reduction Sites. ACS APPLIED MATERIALS & INTERFACES 2023; 15:54590-54601. [PMID: 37966899 PMCID: PMC10694822 DOI: 10.1021/acsami.3c15490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/17/2023]
Abstract
Titanium-based metal-organic framework, NH2-MIL-125(Ti), has been widely investigated for photocatalytic applications but has low activity in the hydrogen evolution reaction (HER). In this work, we show a one-step low-cost postmodification of NH2-MIL-125(Ti) via impregnation of Co(NO3)2. The resulting Co@NH2-MIL-125(Ti) with embedded single-site CoII species, confirmed by XPS and XAS measurements, shows enhanced activity under visible light exposure. The increased H2 production is likely triggered by the presence of active CoI transient sites detected upon collection of pump-flow-probe XANES spectra. Furthermore, both photocatalysts demonstrated a drastic increase in HER performance after consecutive reuse while maintaining their structural integrity and consistent H2 production. Via thorough characterization, we revealed two mechanisms for the formation of highly active proton reduction sites: nondestructive linker elimination resulting in coordinatively unsaturated Ti sites and restructuring of single CoII sites. Overall, this straightforward manner of confinement of CoII cocatalysts within NH2-MIL-125(Ti) offers a highly stable visible-light-responsive photocatalyst.
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Affiliation(s)
- Vitalii Kavun
- Department
of Separation Science, LUT University, FI-53850 Lappeenranta, Finland
| | - Evgeny Uslamin
- Department
of Chemical Engineering, Delft University
of Technology, 2629 HZ Delft, The
Netherlands
| | - Bart van der Linden
- Department
of Chemical Engineering, Delft University
of Technology, 2629 HZ Delft, The
Netherlands
| | - Stefano Canossa
- Department
of Nanochemistry, Max Planck Institute for
Solid State Research, 70569 Stuttgart, Germany
| | - Andrey Goryachev
- Department
of Chemical Engineering, Delft University
of Technology, 2629 HZ Delft, The
Netherlands
| | - Emma E. Bos
- Department
of Chemical Engineering, Delft University
of Technology, 2629 HZ Delft, The
Netherlands
| | - Jara Garcia Santaclara
- Department
of Chemical Engineering, Delft University
of Technology, 2629 HZ Delft, The
Netherlands
| | | | - Eveliina Repo
- Department
of Separation Science, LUT University, FI-53850 Lappeenranta, Finland
| | - Monique A. van der Veen
- Department
of Chemical Engineering, Delft University
of Technology, 2629 HZ Delft, The
Netherlands
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5
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Andrade PHM, Ahouari H, Volkringer C, Loiseau T, Vezin H, Hureau M, Moissette A. Electron-Donor Functional Groups, Band Gap Tailoring, and Efficient Charge Separation: Three Keys To Improve the Gaseous Iodine Uptake in MOF Materials. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37315191 DOI: 10.1021/acsami.3c04955] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Metal-organic frameworks (MOFs) have been largely investigated worldwide for their use in the capture of radioactive iodine due to its potential release during nuclear accident events and reprocessing of nuclear fuel. The present work deals with the capture of gaseous I2 under a continuous flow and its subsequent transformation into I3- within the porous structures of three distinct, yet structurally related, terephthalate-based MOFs: MIL-125(Ti), MIL-125(Ti)_NH2, and CAU-1(Al)_NH2. The synthesized materials exhibited specific surface areas (SSAs) with similar order of magnitude: 1207, 1099, and 1110 m2 g-1 for MIL-125(Ti), MIL-125(Ti)_NH2, and CAU-1(Al)_NH2, respectively. Because of that, it was possible to evaluate the influence of other variables over the iodine uptake capacity─such as band gap energies, functional groups, and charge transfer complexes (CTC). After 72 h of contact with the I2 gas flow, MIL-125(Ti)_NH2 was able to trap 11.0 mol mol-1 of I2, followed by MIL-125(Ti) (8.7 mol mol-1), and by CAU-1(Al)_NH2 (4.2 mol mol-1). The enhanced ability to retain I2 in the MIL-125(Ti)_NH2 was associated with a combined effect between its amino group (which has a great affinity toward iodine), its smaller band gap (2.5 eV against 2.6 and 3.8 eV for CAU-1(Al)_NH2 and MIL-125(Ti), respectively), and its efficient charge separation. In fact, the presence of a linker-to-metal charge transfer (LMCT) mechanism in MIL-125(Ti) compounds separates the photogenerated electrons and holes into the two distinct moieties of the MOF: the organic linker (which stabilizes the holes) and the oxy/hydroxy inorganic cluster (which stabilizes the electrons). This effect was observed using EPR spectroscopy, whereas the reduction of the Ti4+ cations into the paramagnetic Ti3+ species was evidenced after irradiation of the pristine Ti-based MOFs with UV light (<420 nm). In contrast, because CAU-1(Al)_NH2 exhibits a purely linker-based transition (LBT)─with no EPR signals related to Al paramagnetic species─it tends to exhibit faster recombination of the photogenerated charge carriers as, in this case, both electrons and holes are located over the organic linker. Furthermore, the transformation of the gaseous I2 into In- [n = 5, 7, 9, ...] intermediates and then into I3- species was evaluated using Raman spectroscopy by following the evolution of their respective bands at about 198, 180, and 113 cm-1. This conversion─which is favored by an effective charge separation and smaller band gaps─increases the I2 uptake capacity of the compounds by creating specific adsorption sites for these anionic species. In fact, because the -NH2 groups act as an antenna to stabilize the photogenerated holes, both In- and I3- are adsorbed into the organic linker via an electrostatic interaction with these positively charged entities. Finally, changes regarding the EPR spectra before and after the iodine loading were considered to propose a mechanism for the electron transfer from the MOFs structure to the I2 molecules considering their different characteristics.
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Affiliation(s)
- Pedro H M Andrade
- Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement (LASIRE), Université de Lille─Sciences et Technologies, 59655 Villeneuve d'Ascq, France
| | - Hania Ahouari
- Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement (LASIRE), Université de Lille─Sciences et Technologies, 59655 Villeneuve d'Ascq, France
| | - Christophe Volkringer
- Unité de Catalyse et Chimie du Solide (UCCS), Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181, F-59000 Lille, France
| | - Thierry Loiseau
- Unité de Catalyse et Chimie du Solide (UCCS), Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181, F-59000 Lille, France
| | - Hervé Vezin
- Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement (LASIRE), Université de Lille─Sciences et Technologies, 59655 Villeneuve d'Ascq, France
| | - Matthieu Hureau
- Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement (LASIRE), Université de Lille─Sciences et Technologies, 59655 Villeneuve d'Ascq, France
| | - Alain Moissette
- Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement (LASIRE), Université de Lille─Sciences et Technologies, 59655 Villeneuve d'Ascq, France
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6
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Insights into conduction band flexibility induced by spin polarization in titanium-based metal–organic frameworks for photocatalytic water splitting and pollutants degradation. J Colloid Interface Sci 2023; 630:430-442. [DOI: 10.1016/j.jcis.2022.10.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/25/2022] [Accepted: 10/03/2022] [Indexed: 11/06/2022]
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7
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Navalón S, Dhakshinamoorthy A, Álvaro M, Ferrer B, García H. Metal-Organic Frameworks as Photocatalysts for Solar-Driven Overall Water Splitting. Chem Rev 2022; 123:445-490. [PMID: 36503233 PMCID: PMC9837824 DOI: 10.1021/acs.chemrev.2c00460] [Citation(s) in RCA: 49] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Metal-organic frameworks (MOFs) have been frequently used as photocatalysts for the hydrogen evolution reaction (HER) using sacrificial agents with UV-vis or visible light irradiation. The aim of the present review is to summarize the use of MOFs as solar-driven photocatalysts targeting to overcome the current efficiency limitations in overall water splitting (OWS). Initially, the fundamentals of the photocatalytic OWS under solar irradiation are presented. Then, the different strategies that can be implemented on MOFs to adapt them for solar photocatalysis for OWS are discussed in detail. Later, the most active MOFs reported until now for the solar-driven HER and/or oxygen evolution reaction (OER) are critically commented. These studies are taken as precedents for the discussion of the existing studies on the use of MOFs as photocatalysts for the OWS under visible or sunlight irradiation. The requirements to be met to use MOFs at large scale for the solar-driven OWS are also discussed. The last section of this review provides a summary of the current state of the field and comments on future prospects that could bring MOFs closer to commercial application.
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Affiliation(s)
- Sergio Navalón
- Departamento
de Química, Universitat Politècnica
de València, Camino de Vera s/n, Valencia46022, Spain,S.N.: email,
| | - Amarajothi Dhakshinamoorthy
- Departamento
de Química, Universitat Politècnica
de València, Camino de Vera s/n, Valencia46022, Spain,School
of Chemistry, Madurai Kamaraj University, Palkalai Nagar, Madurai625021, Tamil
NaduIndia,A.D.: email,
| | - Mercedes Álvaro
- Departamento
de Química, Universitat Politècnica
de València, Camino de Vera s/n, Valencia46022, Spain
| | - Belén Ferrer
- Departamento
de Química, Universitat Politècnica
de València, Camino de Vera s/n, Valencia46022, Spain
| | - Hermenegildo García
- Departamento
de Química, Universitat Politècnica
de València, Camino de Vera s/n, Valencia46022, Spain,Instituto
Universitario de Tecnología Química, CSIC-UPV, Universitat Politècnica de València, Avenida de los Naranjos, Valencia46022, Spain,H.G.:
email,
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8
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Mohan H, Ha GH, Oh HS, Kim G, Shin T. Zinc iron selenide nanoflowers anchored g-C 3N 4 as advanced catalyst for photocatalytic water splitting and dye degradation. CHEMOSPHERE 2022; 307:135937. [PMID: 35934097 DOI: 10.1016/j.chemosphere.2022.135937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 07/26/2022] [Accepted: 07/31/2022] [Indexed: 06/15/2023]
Abstract
Hydrogen has been considered as a promising clean energy source owing to its renewability and zero carbon emission. Accordingly, photocatalytic water splitting has drawn much attention as a key green technology of producing hydrogen. However, it has remained as a great challenge due to the low production rate and expensive constituents of photocatalytic systems. Herein, we synthesised nanostructures consisting of transition metal selenide and g-C3N4 for photocatalytic water splitting reaction. They include ZnSe, FeSe2, Zn/FeSe2 and ZnFeSe2 nanoflowers and a nanocomposite made of Zn/FeSe2 and g-C3N4. Hydrogen evolution rates in the presence of ZnSe, FeSe2, Zn/FeSe2 and ZnFeSe2 photocatalysts were measured as 60.03, 128.02, 155.11 and 83.59 μmolg-1 min-1, respectively. On the other hand, with the nanocomposite consisting of Zn/FeSe2 and g-C3N4, the hydrogen and oxygen evolution rates were significantly enhanced up to 202.94 μmol g-1min-1 and 90.92 μmol g-1min-1, respectively. The nanocomposite was also examined as a photocatalyst for degradation of rhodamine B showing that it photodegrades the compound two times faster compared to pristine Zn/FeSe2 nanoflowers without g-C3N4. Our study suggests the nanocomposite of Zn/FeSe2 and g-C3N4 as a promising photocatalyst for energy and environmental applications.
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Affiliation(s)
- Harshavardhan Mohan
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Ga Hyeon Ha
- Department of Carbon Composites Convergence Materials Engineering, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Hyeon Seung Oh
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Gitae Kim
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Taeho Shin
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea; Department of Carbon Composites Convergence Materials Engineering, Jeonbuk National University, Jeonju, 54896, Republic of Korea.
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9
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Band alignment of PCN-222 via selection of the metal porphyrin linker for sunlight driven photocatalytic overall water splitting. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Novoa-Cid M, Melillo A, Ferrer B, Alvaro M, Baldovi HG. Photocatalytic Water Splitting Promoted by 2D and 3D Porphyrin Covalent Organic Polymers Synthesized by Suzuki-Miyaura Carbon-Carbon Coupling. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12183197. [PMID: 36144987 PMCID: PMC9503735 DOI: 10.3390/nano12183197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/02/2022] [Accepted: 09/03/2022] [Indexed: 05/14/2023]
Abstract
This work deals with the synthesis of metal-free and porphyrin-based covalent organic polymers (COPs) by the Suzuki-Miyaura coupling carbon-carbon bond forming reaction to study the photocatalytic overall water splitting performance. Apart from using 5,10,15,20-Tetrakis-(4-bromophenyl)porphyrin, we have chosen different cross-linker monomers to induce 2-dimensional (2D) or 3-dimensional (3D) and different rigidity in their resulting polymeric molecular structure. The synthesised COPs were extensively characterised to reveal that the dimensionality and flexibility of the molecular structure play an intense role in the physical, photochemical, and electronic properties of the polymers. Photoinduced excited state of the COPs was evaluated by nanosecond time-resolved laser transient absorption spectroscopy (TAS) by analysing excited state kinetics and quenching experiments, photocurrent density measurements and photocatalytic deposition of Ru3+ to RuO2, and photocatalysis. In summary, TAS experiments demonstrated that the transient excited state of these polymers has two decay kinetics and exhibit strong interaction with water molecules. Moreover, photocurrent and photocatalytic deposition experiments proved that charges are photoinduced and are found across the COP molecular network, but more important charges can migrate from the surface of the COP to the medium. Among the various COPs tested, COP-3 that has a flexible and 3D molecular structure reached the best photocatalytic performances, achieving a photocatalytic yield of 0.4 mmol H2 × gCOP-3-1 after 3 h irradiation.
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Affiliation(s)
- Maria Novoa-Cid
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
- Instituto de Tecnología Química CSIC-UPV, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Arianna Melillo
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Belén Ferrer
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Mercedes Alvaro
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Herme G. Baldovi
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
- Instituto de Tecnología Química CSIC-UPV, Universitat Politècnica de València, 46022 Valencia, Spain
- Correspondence:
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11
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Zhang Y, Wen C, Wu X, Liu PF, Yang HG. Reverse Replacement in NH
2
‐MIL‐125 with 1,4‐Dicarboxybenzene for Enhanced Photocatalytic Hydrogen Generation. Chemistry 2022; 28:e202200938. [DOI: 10.1002/chem.202200938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Yijun Zhang
- Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology Xuhui District 130 200231 Shanghai (P. R. China
| | - Chunfang Wen
- Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology Xuhui District 130 200231 Shanghai (P. R. China
| | - Xuefeng Wu
- Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology Xuhui District 130 200231 Shanghai (P. R. China
| | - Peng Fei Liu
- Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology Xuhui District 130 200231 Shanghai (P. R. China
| | - Hua Gui Yang
- Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology Xuhui District 130 200231 Shanghai (P. R. China
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12
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Nguyen HL. Metal-Organic Frameworks Can Photocatalytically Split Water-Why Not? ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200465. [PMID: 35393683 DOI: 10.1002/adma.202200465] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/10/2022] [Indexed: 06/14/2023]
Abstract
The opinion is provided about the stability and photocatalytic capability of metal-organic frameworks in photocatalytic overall water splitting.
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Affiliation(s)
- Ha L Nguyen
- Department of Chemistry, University of California Berkeley, Berkeley, CA, 94720, USA
- Joint UAEU-UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain, 15551, United Arab Emirates
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13
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Dorneles de Mello M, Ahmad M, Lee DT, Dimitrakellis P, Miao Y, Zheng W, Nykypanchuk D, Vlachos DG, Tsapatsis M, Boscoboinik JA. In Situ Tracking of Nonthermal Plasma Etching of ZIF-8 Films. ACS APPLIED MATERIALS & INTERFACES 2022; 14:19023-19030. [PMID: 35416642 DOI: 10.1021/acsami.2c00259] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Surface characterization is critical for understanding the processes used for preparing catalysts, sorbents, and membranes. Nonthermal plasma (NTP) is a process that achieves high reactivity at low temperatures and is used to tailor the surface properties of materials. In this work, we combine the capabilities of infrared reflection absorption spectroscopy (IRRAS) with NTP for the in situ interrogation of zeolitic imidazolate framework-8 (ZIF-8) thin films to probe modifications in the material induced by oxygen and nitrogen plasmas. The IRRAS measurements in oxygen plasma reveal etching of organic ligands with sequential removal of the methyl group and imidazole ring and with the formation of carbonyl moieties (C═O). In contrast, nitrogen plasma induces mild etching and grafting of nitrile groups (-C≡N). Scanning electron microscopy imaging shows that oxygen plasma, at prolonged times, significantly degrades the ZIF-8 film at the grain boundaries. Treatment of ZIF-8 membranes using mild plasma conditions yields a fivefold enhancement for H2/N2 and CO2/CH4 ideal selectivities and an eightfold enhancement for CO2/N2 ideal selectivity. Additionally, the new tools described here can be used for spectroscopic in situ tracking of plasma-induced chemistry on thin films in general.
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Affiliation(s)
- Matheus Dorneles de Mello
- Catalysis Center for Energy Innovation, University of Delaware, Newark, Delaware 19716, United States
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Mueed Ahmad
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11790, United States
| | - Dennis T Lee
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Panagiotis Dimitrakellis
- Catalysis Center for Energy Innovation, University of Delaware, Newark, Delaware 19716, United States
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, Delaware 19716 United States
| | - Yurun Miao
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Weiqing Zheng
- Catalysis Center for Energy Innovation, University of Delaware, Newark, Delaware 19716, United States
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, Delaware 19716 United States
| | - Dmytro Nykypanchuk
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Dionisios G Vlachos
- Catalysis Center for Energy Innovation, University of Delaware, Newark, Delaware 19716, United States
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, Delaware 19716 United States
| | - Michael Tsapatsis
- Catalysis Center for Energy Innovation, University of Delaware, Newark, Delaware 19716, United States
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland 21218, United States
| | - Jorge Anibal Boscoboinik
- Catalysis Center for Energy Innovation, University of Delaware, Newark, Delaware 19716, United States
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
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14
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Daliran S, Oveisi AR, Peng Y, López-Magano A, Khajeh M, Mas-Ballesté R, Alemán J, Luque R, Garcia H. Metal–organic framework (MOF)-, covalent-organic framework (COF)-, and porous-organic polymers (POP)-catalyzed selective C–H bond activation and functionalization reactions. Chem Soc Rev 2022; 51:7810-7882. [DOI: 10.1039/d1cs00976a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The review summarizes the state-of-the-art of C–H active transformations over crystalline and amorphous porous materials as new emerging heterogeneous (photo)catalysts.
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Affiliation(s)
- Saba Daliran
- Department of Chemistry, Faculty of Sciences, Department of Chemistry, University of Zabol, 98615-538 Zabol, Iran
| | - Ali Reza Oveisi
- Department of Chemistry, Faculty of Sciences, Department of Chemistry, University of Zabol, 98615-538 Zabol, Iran
| | - Yong Peng
- Instituto de Tecnología Química CSIC-UPV, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, Valencia 46022, Spain
| | - Alberto López-Magano
- Inorganic Chemistry Department, Módulo 7, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Mostafa Khajeh
- Department of Chemistry, Faculty of Sciences, Department of Chemistry, University of Zabol, 98615-538 Zabol, Iran
| | - Rubén Mas-Ballesté
- Inorganic Chemistry Department, Módulo 7, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - José Alemán
- Organic Chemistry Department, Módulo 1, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Rafael Luque
- Department of Organic Chemistry, University of Cordoba, Campus de Rabanales, EdificioMarie Curie (C-3), CtraNnal IV-A, Km 396, E14014 Cordoba, Spain
- Peoples Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya str., 117198, Moscow, Russia
| | - Hermenegildo Garcia
- Instituto de Tecnología Química CSIC-UPV, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, Valencia 46022, Spain
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15
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Salcedo-Abraira P, Babaryk AA, Montero-Lanzuela E, Contreras-Almengor OR, Cabrero-Antonino M, Grape ES, Willhammar T, Navalón S, Elkäim E, García H, Horcajada P. A Novel Porous Ti-Squarate as Efficient Photocatalyst in the Overall Water Splitting Reaction under Simulated Sunlight Irradiation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2106627. [PMID: 34632639 DOI: 10.1002/adma.202106627] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/29/2021] [Indexed: 05/27/2023]
Abstract
A new porous titanium(IV) squarate metal-organic framework (MOF), denoted as IEF-11, having a never reported titanium secondary building unit, is successfully synthesized and fully characterized. IEF-11 not only exhibits a permanent porosity but also an outstanding chemical stability. Further, as a consequence of combining the photoactive Ti(IV) and the electroactive squarate, IEF-11 presents relevant optoelectronic properties, applied here to the photocatalytic overall water splitting reaction. Remarkably, IEF-11 as a photocatalyst is able to produce record H2 amounts for MOF-based materials under simulated sunlight (up to 672 µmol gcatalyst in 22 h) without any activity loss during at least 10 d.
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Affiliation(s)
- Pablo Salcedo-Abraira
- Advanced Porous Materials Unit (APMU), IMDEA Energy, Avda. Ramón de la Sagra 3, Móstoles-Madrid, 28935, Spain
| | - Artem A Babaryk
- Advanced Porous Materials Unit (APMU), IMDEA Energy, Avda. Ramón de la Sagra 3, Móstoles-Madrid, 28935, Spain
| | - Eva Montero-Lanzuela
- Departamento de Química and Instituto de Tecnología Química (CSIC-UPV), Universitat Politècnica de València, València, 46022, Spain
| | - Oscar R Contreras-Almengor
- Advanced Porous Materials Unit (APMU), IMDEA Energy, Avda. Ramón de la Sagra 3, Móstoles-Madrid, 28935, Spain
| | - María Cabrero-Antonino
- Departamento de Química and Instituto de Tecnología Química (CSIC-UPV), Universitat Politècnica de València, València, 46022, Spain
| | - Erik Svensson Grape
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden
| | - Tom Willhammar
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden
| | - Sergio Navalón
- Departamento de Química and Instituto de Tecnología Química (CSIC-UPV), Universitat Politècnica de València, València, 46022, Spain
| | - Erik Elkäim
- CRISTAL Beamline, Synchrotron Soleil, L'orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette Cedex, 91192, France
| | - Hermenegildo García
- Departamento de Química and Instituto de Tecnología Química (CSIC-UPV), Universitat Politècnica de València, València, 46022, Spain
| | - Patricia Horcajada
- Advanced Porous Materials Unit (APMU), IMDEA Energy, Avda. Ramón de la Sagra 3, Móstoles-Madrid, 28935, Spain
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16
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Chen Q, Song B, Li X, Wang R, Wang S, Xu S, Reniers F, Lam CH. Enhancing the Properties of Photocatalysts via Nonthermal Plasma Modification: Recent Advances, Treatment Variables, Mechanisms, and Perspectives. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03062] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Qianqian Chen
- School of Material Science and Engineering, Henan University of Technology, 100 Lianhua Street, Zhengzhou 450001, China
| | - Bing Song
- Scion, 49 Sala Street, Whakarewarewa, Rotorua 3010, New Zealand
| | - Xiaochen Li
- Department of Medical Imaging, Henan Provincial People’s Hospital & the People’s Hospital of Zhengzhou University, 7 Weiwu Road, Zhengzhou 450003, China
| | - Renjie Wang
- School of Material Science and Engineering, Henan University of Technology, 100 Lianhua Street, Zhengzhou 450001, China
| | - Shun Wang
- School of Material Science and Engineering, Henan University of Technology, 100 Lianhua Street, Zhengzhou 450001, China
| | - Sankui Xu
- School of Material Science and Engineering, Henan University of Technology, 100 Lianhua Street, Zhengzhou 450001, China
| | - François Reniers
- Chemistry of Surfaces, Interfaces, and Nanomaterials and Laboratoire de Chimie des Polymer̀es, Faculté des Sciences, Universite Libre de Bruxelles, ULB Boulevard du Triomphe, Brussels 1050, Belgium
| | - Chun Ho Lam
- School of Energy and Environment, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong
- State Key Laboratory of Marine Pollution, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong
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17
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Kan MY, Lyu Q, Chu YH, Hsu CC, Lu KL, Lin LC, Kang DY. Suppressing Defect Formation in Metal-Organic Framework Membranes via Plasma-Assisted Synthesis for Gas Separations. ACS APPLIED MATERIALS & INTERFACES 2021; 13:41904-41915. [PMID: 34448575 DOI: 10.1021/acsami.1c13134] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal-organic frameworks (MOFs) are considered as promising materials for membrane gas separations. Structural defects within a pure MOF membrane can considerably reduce its selectivity and possibly result in a nonselective separation. This work proposes a solution-phase synthesis with dielectric barrier discharge (DBD) plasma to suppress the formation of defects in the pure MOF membrane of CPO-8-BPY. Through comprehensive solid-state characterization with XRD, SEM, XPS, solid-state NMR, and XAFS, DBD plasma is demonstrated to facilitate deprotonation in the H2aip linker, which leads to a smaller and more uniform particle size of CPO-8-BPY. The narrow grain size distribution effectively reduces the pinhole-type defects in the pure CPO-8-BPY membrane and endows it with good ideal selectivity for H2/CH4 (αH2/CH4 = 28.2) and N2/CH4 (αN2/CH4 = 5.4). The selectivity for H2/CH4 of this membrane from a mixed-gas permeation test is found to be 15.4. Molecular simulations are also performed to gain insights into the gas transport properties of this MOF. The results suggest that ligand rotation plays an important role in CPO-8-BPY when being applied to the membrane separation of N2/CH4.
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Affiliation(s)
- Ming-Yang Kan
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Qiang Lyu
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 W. Woodruff Avenue, Columbus, Ohio 43210, United States
- School of Materials Science and Engineering, China University of Petroleum (East China), No. 66, West Changjiang Road, Huangdao District, Qingdao, Shandong 266580, China
| | - Yu-Hong Chu
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Cheng-Che Hsu
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Kuang-Lieh Lu
- Department of Chemistry, Fu Jen Catholic University, No. 510, Zhongzheng Road, New Taipei 24205, Taiwan
| | - Li-Chiang Lin
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 W. Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Dun-Yen Kang
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
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18
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Verma P, Kondo Y, Kuwahara Y, Kamegawa T, Mori K, Raja R, Yamashita H. Design and application of photocatalysts using porous materials. CATALYSIS REVIEWS 2021. [DOI: 10.1080/01614940.2021.1948302] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Priyanka Verma
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
- School of Chemistry, University of Southampton, Southampton, UK
| | - Yoshifumi Kondo
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Yasutaka Kuwahara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
- Elements Strategy Initiative for Catalysts & Batteries ESICB, Kyoto University, Kyoto, Japan
- Jst, Presto, Saitama, Japan
| | - Takashi Kamegawa
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka, Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
- Elements Strategy Initiative for Catalysts & Batteries ESICB, Kyoto University, Kyoto, Japan
| | - Robert Raja
- School of Chemistry, University of Southampton, Southampton, UK
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
- Elements Strategy Initiative for Catalysts & Batteries ESICB, Kyoto University, Kyoto, Japan
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19
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Syzgantseva MA, Stepanov NF, Syzgantseva OA. Effect of Ligand Functionalization on the Rate of Charge Carrier Recombination in Metal-Organic Frameworks: A Case Study of MIL-125. J Phys Chem Lett 2021; 12:829-834. [PMID: 33417462 DOI: 10.1021/acs.jpclett.0c03634] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ligand functionalization is a powerful approach for modifying the electronic structure of metal-organic frameworks when targeting the optimal electronic properties for photocatalysis and photovoltaics. However, its effect on the charge carrier lifetimes and recombination pathways remains unexplored. In this work, first-principles simulations, including nonadiabatic molecular dynamics, are performed for the representative TiO2-based metal-organic framework systems MIL-125-X to unravel the impact of ligand functionalization on the nonradiative electron-hole recombination process, decoherence rates, and phonon modes giving the largest contribution to the nonradiative decay. Nonradiative recombination rates, simulated using the PBE0 density functional, are in excellent agreement with experiment. The ligand functionalization in MIL-125-X influences the recombination rates, unraveling the trend opposite to the evolution of the band gap and affecting the nonadiabatic coupling coefficients. Ligand modification impacts the phonon modes, which contribute most to the recombination process, altering the distribution between soft phonon modes and vibrational modes associated with specific structural motifs.
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Affiliation(s)
- Maria A Syzgantseva
- Laboratory of Quantum Mechanics and Molecular Structure, Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Nikolay F Stepanov
- Laboratory of Quantum Mechanics and Molecular Structure, Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Olga A Syzgantseva
- Laboratory of Quantum Photodynamics, Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
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