1
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Minussi FB, Silva RM, Moraes JCS, Araújo EB. Organic cations in halide perovskite solid solutions: exploring beyond size effects. Phys Chem Chem Phys 2024. [PMID: 39072678 DOI: 10.1039/d4cp02419b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Halide perovskites are a class of materials of consolidated optoelectronic and electrochemical applications, reaching efficiencies compared to established materials in respective fields. In this scenario, the design and understanding of composition-structure-property relations is imperative. In solid solutions containing mixed cations, some direct relations between the sizes of the substituents and the properties of perovskites are generally observed. However, in several cases, these relations are not observed, implying that other characteristics of these cations play a major role. Despite its importance, this understanding has not been comprehensively deepened. To address this issue, we synthesized and characterized the structure, electrical behavior, and stability of methylammonium lead iodide-based perovskites with equal amounts of the substituents guanidinium, ethylammonium, and acetamidinium. These three large organic cations have essentially equal sizes but other remarkably different characteristics, such as the number of N-H bonds, intrinsic dipole moment, and order of C-N bonds. Herein, we show that these cations have dramatically different effects over important fundamental and applied properties of resulting perovskites, including the orthorhombic-to-tetragonal and tetragonal-to-cubic phase transitions, microstructural development, ionic conductivity, I-V hysteresis, electronic carrier mobility, and stability against light-induced degradation. These effects are correlated with the characteristics of the large substituent cations and help pave the way for a better rational chemical design of halide perovskites.
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Affiliation(s)
- F B Minussi
- Department of Physics and Chemistry, São Paulo State University, Ilha Solteira, 15385-007, SP, Brazil.
| | - R M Silva
- Department of Electrical Engineering, São Paulo State University, Ilha Solteira, 15385-007, SP, Brazil
| | - J C S Moraes
- Department of Physics and Chemistry, São Paulo State University, Ilha Solteira, 15385-007, SP, Brazil.
| | - E B Araújo
- Department of Physics and Chemistry, São Paulo State University, Ilha Solteira, 15385-007, SP, Brazil.
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2
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Baghdadi Y, Daboczi M, Temerov F, Yang M, Cui J, Eslava S. A g-C 3N 4/rGO/Cs 3Bi 2Br 9 mediated Z-scheme heterojunction for enhanced photocatalytic CO 2 reduction. JOURNAL OF MATERIALS CHEMISTRY. A 2024; 12:16383-16395. [PMID: 38988703 PMCID: PMC11232668 DOI: 10.1039/d4ta01857e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 05/16/2024] [Indexed: 07/12/2024]
Abstract
Photocatalytic CO2 reduction plays a crucial role in advancing solar fuels, and enhancing the efficiency of the chosen photocatalysts is essential for sustainable energy production. This study demonstrates advancements in the performance of g-C3N4 as a photocatalyst achieved through surface modifications such as exfoliation to increase surface area and surface oxidation for improved charge separation. We also introduce reduced graphene oxide (rGO) in various ratios to both bulk and exfoliated g-C3N4, which effectively mitigates charge recombination and establishes an optimal ratio for enhanced efficiency. g-C3N4/rGO serves to fabricate a hybrid organic/inorganic heterojunction with Cs3Bi2Br9, resulting in a g-C3N4/rGO/Cs3Bi2Br9 composite. This leads to a remarkable increase in photocatalytic conversion of CO2 and H2O to CO, H2 and CH4 at rates of 54.3 (±2.0) μmole- g-1 h-1, surpassing that of pure Cs3Bi2Br9 (11.2 ± 0.4 μmole- g-1 h-1) and bulk g-C3N4 (5.5 ± 0.5 μmole- g-1 h-1). The experimentally determined energy diagram indicates that rGO acts as a solid redox mediator between g-C3N4 and Cs3Bi2Br9 in a Z-scheme heterojunction configuration, ensuring that the semiconductor (Cs3Bi2Br9) with the shallowest conduction band drives the reduction and the one with the deepest valence band (g-C3N4) drives the oxidation. The successful formation of this high-performance heterojunction underscores the potential of the developed composite as a photocatalyst for CO2 reduction, offering promising prospects for advancing the field of solar fuels and achieving sustainable energy goals.
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Affiliation(s)
- Yasmine Baghdadi
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
| | - Matyas Daboczi
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
| | - Filipp Temerov
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
- Nano and Molecular System (NANOMO) Research Unit, University of Oulu Oulu 90570 Finland
| | - Mengya Yang
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
| | - Junyi Cui
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
| | - Salvador Eslava
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
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3
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Zhao H, Sun J, Kumar S, Li P, Thalluri SM, Wang ZM, Thumu U. Recent advances in metal halide perovskite based photocatalysts for artificial photosynthesis and organic transformations. Chem Commun (Camb) 2024; 60:5890-5911. [PMID: 38775203 DOI: 10.1039/d4cc01949k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
Metal halide perovskites (MHP) emerged as highly promising materials for photocatalysis, offering significant advancements in the degradation of soluble and airborne pollutants, as well as the transformation of functional organic compounds. This comprehensive review focuses on recent developments in MHP-based photocatalysts, specifically examining two major categories: lead-based (such as CsPbBr3) and lead-free variants (e.g. Cs2AgBiX6, Cs3Bi2Br9 and others). While the review briefly discusses the contributions of MHPs to hydrogen (H2) production and carbon dioxide (CO2) reduction, the main emphasis is on the design principles that determine the effectiveness of perovskites in facilitating organic reactions and degrading hazardous chemicals through oxidative transformations. Furthermore, the review addresses the key factors that influence the catalytic efficiency of perovskites, including charge recombination, reaction mechanisms involving free radicals, hydroxyl ions, and other ions, as well as phase transformation and solvent compatibility. By offering a comprehensive overview, this review aims to serve as a guide for the design of MHP-based photocatalysis and shed light on the common challenges faced by the scientific community in the domain of organic transformations.
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Affiliation(s)
- Hairong Zhao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Jiachen Sun
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Sonu Kumar
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Peihang Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | | | - Zhiming M Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Udayabhaskararao Thumu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China.
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4
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Wang C, Xie Z, Wang Y, Ding Y, Leung MKH, Ng YH. Defects of Metal Halide Perovskites in Photocatalytic Energy Conversion: Friend or Foe? ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402471. [PMID: 38828743 DOI: 10.1002/advs.202402471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/17/2024] [Indexed: 06/05/2024]
Abstract
Photocatalytic solar-to-fuel conversion over metal halide perovskites (MHPs) has recently attracted much attention, while the roles of defects in MHPs are still under debate. Specifically, the mainstream viewpoint is that the defects are detrimental to photocatalytic performance, while some recent studies show that certain types of defects contribute to photoactivity enhancement. However, a systematic summary of why it is contradictory and how the defects in MHPs affect photocatalytic performance is still lacking. In this review, the innovative roles of defects in MHP photocatalysts are highlighted. First, the origins of defects in MHPs are elaborated, followed by clarifying certain benefits of defects in photocatalysts including optical absorption, charge dynamics, and surface reaction. Afterward, the recent progress on defect-related MHP photocatalysis, i.e., CO2 reduction, H2 generation, pollutant degradation, and organic synthesis is systematically discussed and critically appraised, putting emphasis on their beneficial effects. With defects offering peculiar sets of merits and demerits, the personal opinion on the ongoing challenges is concluded and outlining potentially promising opportunities for engineering defects on MHP photocatalysts. This critical review is anticipated to offer a better understanding of the MHP defects and spur some inspiration for designing efficient MHP photocatalysts.
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Affiliation(s)
- Chunhua Wang
- School of Energy and Environment, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Zhirun Xie
- School of Energy and Environment, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Yannan Wang
- Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Leuven, 3001, Belgium
| | - Yang Ding
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Michael K H Leung
- School of Energy and Environment, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Yun Hau Ng
- School of Energy and Environment, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
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5
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Chatterjee S, Mukherjee P, Sen A, Sen P. Evidence of Short-Lived High-Energy Emissive State and Triplet Character of the Self-Trapped Exciton in Cs 3Cu 2I 5 Perovskite. J Phys Chem Lett 2024; 15:4191-4196. [PMID: 38598408 DOI: 10.1021/acs.jpclett.4c00511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Cs3Cu2I5 perovskite displays a Stokes-shifted photoluminescence (PL) at 445 nm, attributed to the self-trapped excitons (STEs). Unlike that observed in other perovskite materials, the free-exciton emission is not evidenced in this case. Herein, we reveal the existence of a short-lived high-energy emission centered around 375 nm through the reconstruction of time-resolved emission spectra (TRES), which is independent of the shape/size of Cs3Cu2I5 perovskite. This high-energy emission is proposed to originate from the free-exciton-derived distorted S1 state of the 0D Cs3Cu2I5 moiety. Moreover, STE PL (∼445 nm) was found to have phosphorescence characteristics. Theoretical calculation confirms a facile intersystem crossing at the Franck-Condon geometry, indicating the high lifetime of the STE and its triplet nature. The existence of a high-energy emissive state and the phosphorescent nature of the STE PL band provide valuable insights that could advance our understanding of the photophysics in these materials.
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Affiliation(s)
- Shovon Chatterjee
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, U.P., India
| | - Puspal Mukherjee
- Department of Chemistry, School of Sciences, Netaji Subhas Open University, Kolkata 700 064, W.B., India
| | - Arghya Sen
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, U.P., India
| | - Pratik Sen
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, U.P., India
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6
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Jagadeeswararao M, Galian RE, Pérez-Prieto J. Photocatalysis Based on Metal Halide Perovskites for Organic Chemical Transformations. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 14:94. [PMID: 38202549 PMCID: PMC10780689 DOI: 10.3390/nano14010094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/19/2023] [Accepted: 12/23/2023] [Indexed: 01/12/2024]
Abstract
Heterogeneous photocatalysts incorporating metal halide perovskites (MHPs) have garnered significant attention due to their remarkable attributes: strong visible-light absorption, tuneable band energy levels, rapid charge transfer, and defect tolerance. Additionally, the promising optical and electronic properties of MHP nanocrystals can be harnessed for photocatalytic applications through controlled crystal structure engineering, involving composition tuning via metal ion and halide ion variations, dimensional tuning, and surface chemistry modifications. Combination of perovskites with other materials can improve the photoinduced charge separation and charge transfer, building heterostructures with different band alignments, such as type-II, Z-scheme, and Schottky heterojunctions, which can fine-tune redox potentials of the perovskite for photocatalytic organic reactions. This review delves into the activation of organic molecules through charge and energy transfer mechanisms. The review further investigates the impact of crystal engineering on photocatalytic activity, spanning a diverse array of organic transformations, such as C-X bond formation (X = C, N, and O), [2 + 2] and [4 + 2] cycloadditions, substrate isomerization, and asymmetric catalysis. This study provides insights to propel the advancement of metal halide perovskite-based photocatalysts, thereby fostering innovation in organic chemical transformations.
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Affiliation(s)
| | - Raquel E. Galian
- Institute of Molecular Science, University of Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain;
| | - Julia Pérez-Prieto
- Institute of Molecular Science, University of Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain;
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7
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Giancaspro M, Panniello A, Depalo N, Comparelli R, Striccoli M, Curri ML, Fanizza E. Understanding the Effect of the Synthetic Method and Surface Chemistry on the Properties of CsPbBr 3 Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 14:81. [PMID: 38202535 PMCID: PMC10780980 DOI: 10.3390/nano14010081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/22/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024]
Abstract
Over the last decade, the attractive properties of CsPbBr3 nanoparticles (NPs) have driven ever-increasing progress in the development of synthetic procedures to obtain high-quality NPs at high concentrations. Understanding how the properties of NPs are influenced by the composition of the reaction mixture in combination with the specific synthetic methodology is crucial, both for further elucidating the fundamental characteristics of this class of materials and for their manufacturing towards technological applications. This work aims to shed light on this aspect by synthesizing CsPbBr3 NPs by means of two well-assessed synthetic procedures, namely, hot injection (HI) and ligand-assisted reprecipitation (LARP) in non-polar solvents, using PbBr2 and Cs2CO3 as precursors in the presence of already widely investigated ligands. The overall goal is to study and compare the properties of the NPs to understand how each synthetic method influences the NPs' size and/or the optical properties. Reaction composition and conditions are purposely tuned towards the production of nanocubes with narrow size distribution, high emission properties, and the highest achievable concentration. As a result, the formation of bulk crystals as precipitate in LARP limits the achievement of a highly concentrated NP solution. The size of the NPs obtained by LARP seems to be poorly affected by the ligands' nature and the excess bromide, as consequence of bromide-rich solvation agents, effectively results in NPs with excellent emission properties. In contrast, NPs synthesized by HI exhibit high reaction yield, diffusion growth-controlled size, and less striking emission properties, probably ascribed to a bromide-deficient condition.
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Affiliation(s)
- Mariangela Giancaspro
- Dipartimento di Chimica, University of Bari, Via Orabona 4, 70126 Bari, Italy;
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
| | - Annamaria Panniello
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
| | - Nicoletta Depalo
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
| | - Roberto Comparelli
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Bari Research Unit, 50121 Firenze, Italy
| | - Marinella Striccoli
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Bari Research Unit, 50121 Firenze, Italy
| | - Maria Lucia Curri
- Dipartimento di Chimica, University of Bari, Via Orabona 4, 70126 Bari, Italy;
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Bari Research Unit, 50121 Firenze, Italy
| | - Elisabetta Fanizza
- Dipartimento di Chimica, University of Bari, Via Orabona 4, 70126 Bari, Italy;
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Bari Research Unit, 50121 Firenze, Italy
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8
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Alothman AA, Khan MR, Albaqami MD, Mohandoss S, Alothman ZA, Ahmad N, Alqahtani KN. Ti 3C 2-MXene/NiO Nanocomposites-Decorated CsPbI 3 Perovskite Active Materials under UV-Light Irradiation for the Enhancement of Crystal-Violet Dye Photodegradation. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3026. [PMID: 38063722 PMCID: PMC10707859 DOI: 10.3390/nano13233026] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 11/17/2023] [Accepted: 11/23/2023] [Indexed: 06/26/2024]
Abstract
Ti3C2-MXene material, known for its strong electronic conductivity and optical properties, has emerged as a promising alternative to noble metals as a cocatalyst for the development of efficient photocatalysts used in environmental cleanup. In this study, we investigated the photodegradation of crystal-violet (CV) dye when exposed to UV light using a newly developed photocatalyst known as Ti3C2-MXene/NiO nanocomposite-decorated CsPbI3 perovskite, which was synthesized through a hydrothermal method. Our research investigation into the structural, morphological, and optical characteristics of the Ti3C2-MXene/NiO/CsPbI3 composite using techniques such as FTIR, XRD, TEM, SEM-EDS mapping, XPS, UV-Vis, and PL spectroscopy. The photocatalytic efficacy of the Ti3C2-MXene/NiO/CsPbI3 composite was assessed by evaluating its ability to degrade CV dye in an aqueous solution under UV-light irradiation. Remarkably, the Ti3C2-MXene/NiO/CsPbI3 composite displayed a significant improvement in both the degradation rate and stability of CV dye when compared to the Ti3C2-MXene/NiO nanocomposite and CsPbI3 perovskite materials. Furthermore, the UV-visible absorption spectrum of the Ti3C2-MXene/NiO/CsPbI3 composite demonstrated a reduced band gap of 2.41 eV, which is lower than that of Ti3C2-MXene/NiO (3.10 eV) and Ti3C2-MXene (1.60 eV). In practical terms, the Ti3C2-MXene/NiO/CsPbI3 composite achieved an impressive 92.8% degradation of CV dye within 90 min of UV light exposure. We also confirmed the significant role of photogenerated holes and radicals in the CV dye removal process through radical scavenger trapping experiments. Based on our findings, we proposed a plausible photocatalytic mechanism for the Ti3C2-MXene/NiO/CsPbI3 composite. This research may open up new avenues for the development of cost-effective and high-performance MXene-based perovskite photocatalysts, utilizing abundant and sustainable materials for environmental remediation.
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Affiliation(s)
- Asma A Alothman
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammad Rizwan Khan
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Munirah D Albaqami
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Sonaimuthu Mohandoss
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Zeid A Alothman
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Naushad Ahmad
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Khadraa N Alqahtani
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
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9
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Daboczi M, Cui J, Temerov F, Eslava S. Scalable All-Inorganic Halide Perovskite Photoanodes with >100 h Operational Stability Containing Earth-Abundant Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2304350. [PMID: 37667871 DOI: 10.1002/adma.202304350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/09/2023] [Indexed: 09/06/2023]
Abstract
The application of halide perovskites in the photoelectrochemical generation of solar fuels and feedstocks is hindered by the instability of perovskites in aqueous electrolytes and the use of expensive electrode and catalyst materials, particularly in photoanodes driving kinetically slow water oxidation. Here, solely earth-abundant materials are incorporated to fabricate a CsPbBr3 -based photoanode that reaches a low onset potential of +0.4 VRHE and 8 mA cm-2 photocurrent density at +1.23 VRHE for water oxidation, close to the radiative efficiency limit of CsPbBr3 . This photoanode retains 100% of its stabilized photocurrent density for more than 100 h of operation by replacing once the inexpensive graphite sheet upon signs of deterioration. The improved performance is due to an efficiently electrodeposited NiFeOOH catalyst on a protective self-adhesive graphite sheet, and enhanced charge transfer achieved by phase engineering of CsPbBr3 . Devices with >1 cm2 area, and low-temperature processing demonstrate the potential for low capital cost, stable, and scalable perovskite photoanodes.
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Affiliation(s)
- Matyas Daboczi
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London, SW7 2AZ, UK
| | - Junyi Cui
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London, SW7 2AZ, UK
| | - Filipp Temerov
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London, SW7 2AZ, UK
- Nano and Molecular Systems Research Unit, University of Oulu, Oulu, FI-90014, Finland
| | - Salvador Eslava
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London, SW7 2AZ, UK
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10
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Baghdadi Y, Temerov F, Cui J, Daboczi M, Rattner E, Sena MS, Itskou I, Eslava S. Cs 3Bi 2Br 9/g-C 3N 4 Direct Z-Scheme Heterojunction for Enhanced Photocatalytic Reduction of CO 2 to CO. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:8607-8620. [PMID: 37901142 PMCID: PMC10601477 DOI: 10.1021/acs.chemmater.3c01635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/28/2023] [Indexed: 10/31/2023]
Abstract
Lead-free halide perovskite derivative Cs3Bi2Br9 has recently been found to possess optoelectronic properties suitable for photocatalytic CO2 reduction reactions to CO. However, further work needs to be performed to boost charge separation for improving the overall efficiency of the photocatalyst. This report demonstrates the synthesis of a hybrid inorganic/organic heterojunction between Cs3Bi2Br9 and g-C3N4 at different ratios, achieved by growing Cs3Bi2Br9 crystals on the surface of g-C3N4 using a straightforward antisolvent crystallization method. The synthesized powders showed enhanced gas-phase photocatalytic CO2 reduction in the absence of hole scavengers of 14.22 (±1.24) μmol CO g-1 h-1 with 40 wt % Cs3Bi2Br9 compared with 1.89 (±0.72) and 5.58 (±0.14) μmol CO g-1 h-1 for pure g-C3N4 and Cs3Bi2Br9, respectively. Photoelectrochemical measurements also showed enhanced photocurrent in the 40 wt % Cs3Bi2Br9 composite, demonstrating enhanced charge separation. In addition, stability tests demonstrated structural stability upon the formation of a heterojunction, even after 15 h of illumination. Band structure alignment and selective metal deposition studies indicated the formation of a direct Z-scheme heterojunction between the two semiconductors, which boosted charge separation. These findings support the potential of hybrid organic/inorganic g-C3N4/Cs3Bi2Br9 Z-scheme photocatalyst for enhanced CO2 photocatalytic activity and improved stability.
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Affiliation(s)
- Yasmine Baghdadi
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Filipp Temerov
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
- Nano
and molecular system (NANOMO) research unit, University of Oulu, Oulu 90570, Finland
| | - Junyi Cui
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Matyas Daboczi
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Eduardo Rattner
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Michael Segundo Sena
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Graduation in Chemical Engineering, Universidade
Federal do Rio Grande do Norte/UFRN, 59.078-970 Rio Grande do Norte, Brazil
| | - Ioanna Itskou
- Barrer
Centre, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United
Kingdom
| | - Salvador Eslava
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
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11
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Geldasa FT, Kebede MA, Shura MW, Hone FG. Experimental and computational study of metal oxide nanoparticles for the photocatalytic degradation of organic pollutants: a review. RSC Adv 2023; 13:18404-18442. [PMID: 37342807 PMCID: PMC10278095 DOI: 10.1039/d3ra01505j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/31/2023] [Indexed: 06/23/2023] Open
Abstract
Photocatalysis is a more proficient technique that involves the breakdown or decomposition of different organic contaminants, various dyes, and harmful viruses and fungi using UV or visible light solar spectrum. Metal oxides are considered promising candidate photocatalysts owing to their low cost, efficiency, simple fabricating method, sufficient availability, and environment-friendliness for photocatalytic applications. Among metal oxides, TiO2 is the most studied photocatalyst and is highly applied in wastewater treatment and hydrogen production. However, TiO2 is relatively active only under ultraviolet light due to its wide bandgap, which limits its applicability because the production of ultraviolet is expensive. At present, the discovery of a photocatalyst of suitable bandgap with visible light or modification of the existing photocatalyst is becoming very attractive for photocatalysis technology. However, the major drawbacks of photocatalysts are the high recombination rate of photogenerated electron-hole pairs, the ultraviolet light activity limitations, and low surface coverage. In this review, the most commonly used synthesis method for metal oxide nanoparticles, photocatalytic applications of metal oxides, and applications and toxicity of different dyes are comprehensively highlighted. In addition, the challenges in the photocatalytic applications of metal oxides, strategies to suppress these challenges, and metal oxide studied by density functional theory for photocatalytic applications are described in detail.
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Affiliation(s)
- Fikadu Takele Geldasa
- Adama Science and Technology University, Department of Applied Physics P. O. Box1888 Adama Ethiopia
- Oda Bultum University, Department of Physics P. O. Box 226, Chiro Ethiopia
| | - Mesfin Abayneh Kebede
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa Florida Science Campus Johannesburg 1710 South Africa
| | - Megersa Wodajo Shura
- Adama Science and Technology University, Department of Applied Physics P. O. Box1888 Adama Ethiopia
| | - Fekadu Gashaw Hone
- Addis Ababa University, Department of Physics P.O. Box: 1176 Addis Ababa Ethiopia
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Rosa-Pardo I, Zhu D, Cortés-Villena A, Prato M, De Trizio L, Manna L, Galian RE, Pérez-Prieto J. The Dark Side of Lead-Free Metal Halide Nanocrystals: Substituent-Modulated Photocatalytic Activity in Benzyl Bromide Reduction. ACS ENERGY LETTERS 2023; 8:2789-2798. [PMID: 37324538 PMCID: PMC10262690 DOI: 10.1021/acsenergylett.3c00771] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 05/16/2023] [Indexed: 06/17/2023]
Abstract
We illustrate here the high photocatalytic activity of sustainable lead-free metal halide nanocrystals (NCs), namely, Cs3Sb2Br9 NCs, in the reduction of p-substituted benzyl bromides in the absence of a cocatalyst. The electronic properties of the benzyl bromide substituents and the substrate affinity to the NC surface determine the selectivity in C-C homocoupling under visible light irradiation. This photocatalyst can be reused for at least three cycles and preserves its good performance with a turnover number of ca. 105,000.
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Affiliation(s)
- Ignacio Rosa-Pardo
- Institute
of Molecular Science, University of Valencia, c/Cat. José Beltrán
2, Paterna, 46980 Valencia, Spain
| | - Dongxu Zhu
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Alejandro Cortés-Villena
- Institute
of Molecular Science, University of Valencia, c/Cat. José Beltrán
2, Paterna, 46980 Valencia, Spain
| | - Mirko Prato
- Materials
Characterization Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Luca De Trizio
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Raquel E. Galian
- Institute
of Molecular Science, University of Valencia, c/Cat. José Beltrán
2, Paterna, 46980 Valencia, Spain
| | - Julia Pérez-Prieto
- Institute
of Molecular Science, University of Valencia, c/Cat. José Beltrán
2, Paterna, 46980 Valencia, Spain
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Chen ZY, Huang NY, Xu Q. Metal halide perovskite materials in photocatalysis: Design strategies and applications. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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