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Yang R, Shi X, Ye Q, Li Q, Zhang Q, Li D, Jiang D. Molybdenum diselenide/polymeric carbon nitride dual-homojunction photocatalyst with multi-step charge transfer for efficient catalytic carbon dioxide reduction. J Colloid Interface Sci 2024; 673:985-996. [PMID: 38959699 DOI: 10.1016/j.jcis.2024.06.050] [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: 02/19/2024] [Revised: 06/05/2024] [Accepted: 06/06/2024] [Indexed: 07/05/2024]
Abstract
Due to the high dissociation energy of carbon dioxide (CO2) and sluggish charge transfer dynamics, photocatalytic CO2 reduction with high performance remains a huge challenge. Herein, we report a novel dual-homojunction photocatalyst comprising of cyano/cyanamide groups co-modified carbon nitride (CN-TH) intramolecular homojunction and 1 T/2H-MoSe2 homojunction (denoted as 1 T/2H-MoSe2/CN-TH) for enhanced photocatalytic CO2 reduction. In this dual-homojunction photocatalyst, the intramolecular CN-TH homojunction could promote the intralayer charge separation and transfer owing to the strong electron-withdrawing capabilities of the two-type cyanamide, while the 1 T/2H-MoSe2 homojunction mainly contributes to a promote interlayer charge transport of CN-TH. This could consequently induce a tandem multi-step charge transfer and accelerate the charge transfer dynamics, resulting in enhanced CO2 reduction activities. Thanks to this tandem multi-step charge transfer, the optimized 1 T/2H-MoSe2/CN-TH dual-homojunction photocatalyst presented a high CO yield of 27.36 μmol·g-1·h-1, which is 3.58 and 2.87 times higher than those of 1 T/2H-MoSe2/CN and 2H-MoSe2/CN-TH single homojunctions, respectively. This work provides a novel strategy for efficient CO2 reduction via achieving a tandem multi-step charge transfer through designing dual-homojunction photocatalyst.
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Affiliation(s)
- Ran Yang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiangli Shi
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Qianjin Ye
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Qin Li
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Qiong Zhang
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Di Li
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Deli Jiang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
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2
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Kumar K, Saini P, Sethi M, Saini S, Gurjar A, Konar A, Dietzek-Ivanšić B, Weigand W, Parewa V. Vacancy-Engineered 1D Nanorods with Spatially Segregated Dual Redox Sites for Visible-Light-Driven Cooperative CO 2 Reduction. ACS APPLIED MATERIALS & INTERFACES 2024; 16:43498-43511. [PMID: 39115165 DOI: 10.1021/acsami.4c06834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
Cooperative CO2 photoreduction with tailored organic synthesis offers a potent avenue for harnessing concurrently generated electrons and holes, facilitating the creation of both solar fuels and specialized chemical compounds. However, controlling the crystallization and morphologies of metal-free molecular nanostructures with exceptional photocatalytic activities toward CO2 reduction remains a significant challenge. These hurdles encompass insufficient CO2 activation potential, sluggish multielectron processes, delayed charge-separation kinetics, inadequate storage of long-lived photoexcitons, unfavorable thermodynamic conditions, and the precise control of product selectivity. Here, melem oligomer 2D nanosheets (MNSs) synthesized through pyrolysis are transformed into 1D nanorods (MNRs) at room temperature with the simultaneous engineering of vacancies and morphology. Transient absorption spectral analysis reveals that vacancies in MNRs trap charges, extending charge carrier lifetimes. Additionally, carbon vacancies enhance CO2 adsorption by increasing amine functional centers. The photocatalytic performance of MNRs for CO2 reduction coupled with benzyl alcohol oxidation is approximately ten times higher (CH3OH and aromatic aldehyde production rate 27 ± 0.5 and 93 ± 0.5 mmol g-1 h-1, respectively) than for the MNSs (CH3OH and aromatic aldehyde production rate 2.9 ± 0.5 and 9 ± 0.5 mmol g-1 h-1, respectively). The CO2 reduction pathway involved the carbon-coordinated formyl pathway through the formation of *COOH and *CHO intermediates, as mapped by in situ Fourier-transform infrared spectroscopy. The superior performance of MNRs is attributed to favorable energy-level alignment, enriched amine surfaces, and unique morphology, enhancing solar-to-chemical conversion.
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Affiliation(s)
- Krishan Kumar
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur 302004 India
| | - Pratibha Saini
- Institute Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Jena D-07743, Germany
- Institute for Physical Chemistry (IPC), Friedrich Schiller University Jena, Jena D-07743, Germany
| | - Mukul Sethi
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur 302004 India
| | - Surendra Saini
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur 302004 India
| | - Aditya Gurjar
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur 302004 India
| | - Arindam Konar
- Institute for Physical Chemistry (IPC), Friedrich Schiller University Jena, Jena D-07743, Germany
| | - Benjamin Dietzek-Ivanšić
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
- Department of Functional Interfaces, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, Jena 07745, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Philosophenweg 7a, Jena 07743, Germany
| | - Wolfgang Weigand
- Institute Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Jena D-07743, Germany
| | - Vijay Parewa
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur 302004 India
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Kaur A, Goswami T, Babu KJ, Ghosh HN. Ultrafast Electron and Hole Transfer and Efficient Charge Separation in a Sb 2Se 3/CdS Thin Film p-n Heterojunction. J Phys Chem Lett 2024; 15:3541-3548. [PMID: 38526219 DOI: 10.1021/acs.jpclett.4c00015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Harvesting solar energy for different applications requires the continuous development of new semiconducting materials to exploit a broad part of the solar spectrum. In this direction, antimony selenide (Sb2Se3) has attracted a tremendous amount of attention over the past few years as a light-harvesting material for photovoltaic device applications owing to its phase stability, high absorption coefficient, earth abundance, and low toxicity. Here, we have fabricated a high-quality heterojunction of a p-type Sb2Se3 film and an n-type CdS film using the thermal evaporation technique. The photocurrent of the heterosystem was significantly higher than that of the pristine materials. This optoelectronic response was investigated using femtosecond transient absorption (TA) spectroscopy. TA study reveals the existence of an instantaneous electron transfer from Sb2Se3 to CdS, accompanied by a substantial charge separation at the heterojunction. Our study deals with the investigation of a well-designed p-n device, paving the way for the fabrication of highly efficient photovoltaic devices.
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Affiliation(s)
- Arshdeep Kaur
- Institute of Nano Science and Technology, SAS Nagar Sector 81, Mohali, Punjab 140306, India
| | - Tanmay Goswami
- Institute of Nano Science and Technology, SAS Nagar Sector 81, Mohali, Punjab 140306, India
| | | | - Hirendra N Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha 752050, India
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Yang X, Ren L, Jiang D, Yin L, Li Z, Yuan Y. Strong Interfacial Chemical Bonding in Regulating Electron Transfer and Stabilizing Catalytic Sites in a Metal-Semiconductor Schottky Junction for Enhanced Photocatalysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308408. [PMID: 38032173 DOI: 10.1002/smll.202308408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/30/2023] [Indexed: 12/01/2023]
Abstract
The weak electronic interaction at metal-photocatalyst heterointerfaces often compromises solar-to-fuel performance. Here, a trifunctional Schottky junction, involving chemically stabilized ultrafine platinum nanoparticles (Pt NPs, ≈3 nm in diameter) on graphitic carbon nitride nanosheets (CNs) is proposed. The Pt-CN electronic interaction induces a 1.5% lattice compressive strain in Pt NPs and maintains their ultrafine size, effectively preventing their aggregation during photocatalytic reactions. Density functional theory calculations further demonstrate a significant reduction in the Schottky barrier at the chemically bonded CN-Pt heterointerface, facilitating efficient interfacial electron transfer, as supported by femtosecond transient absorption spectra (fs-TAS) measurements. The combined effects of lattice strain, stabilized Pt NPs, and efficient interfacial charge transport collaboratively enhance the photocatalytic performance, leading to over an 11-fold enhancement in visible light H2 production (8.52 mmol g-1 h-1) compared to the CN nanosheets with the in situ photo-deposited Pt NPs (0.76 mmol g-1 h-1). This study highlights the effectiveness of strong metal-semiconductor electronic interactions and underscores the potential for developing high-efficiency photocatalysts.
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Affiliation(s)
- Xiaonan Yang
- School of Materials Science and Engineering, Key Laboratory of Structure and Performance of Functional Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, China
| | - Liteng Ren
- School of Materials Science and Engineering, Key Laboratory of Structure and Performance of Functional Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, China
| | - Daochuan Jiang
- School of Materials Science and Engineering, Key Laboratory of Structure and Performance of Functional Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, China
| | - Lisha Yin
- Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
| | - Zhongjun Li
- School of Physics, Hefei University of Technology, Hefei, 230009, China
| | - Yupeng Yuan
- School of Materials Science and Engineering, Key Laboratory of Structure and Performance of Functional Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, China
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Pan F, Long L, Li Z, Yan S, Wang L, Lv G, Zhang J, Chen J, Liang G, Wang D. Substitutional Cd Dopant as Photohole Transfer Mediator Boosting Photoelectrochemical Solar Energy Conversion of 2D Cd-ZnIn 2 S 4 Photoanode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304846. [PMID: 37910867 DOI: 10.1002/smll.202304846] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 09/24/2023] [Indexed: 11/03/2023]
Abstract
Fast recombination dynamics of photocarriers competing with sluggish surface photohole oxidation kinetics severely restricts the photoelectrochemical (PEC) conversion efficiency of photoanode. Here, a defect engineering strategy is developed to regulate photohole transfer and interfacial injection dynamics of 2D ZnIn2 S4 (ZIS). Via selectively introducing substitutional Cd dopant at Zn sites of the ZIS basal plane, energy band structure and surface electrochemical activity are successfully modulated in the Cd-doped ZIS (Cd-ZIS) nanosheet array photoanode. Comprehensive characterizations manifest that a shallow acceptor level induced by Cd doping and superior electrochemical activity make surface Cd dopants simultaneously act as capture centers and active sites to mediate photohole dynamics at the reaction interface. In depth photocarrier dynamics analysis demonstrates that highly efficient photohole capture of Cd dopants brings about effective space separation of photocarriers and acceleration of surface reaction kinetics. Therefore, the optimum 2D Cd-ZIS achieves excellent PEC solar energy conversion efficiency with a photocurrent density of 5.1 mA cm-2 at 1.23 VRHE and a record of applied bias photon-to-current efficiency (ABPE) of 3.0%. This work sheds light on a microstructure design strategy to effectively regulate photohole dynamics for the next-generation semiconducting PEC photoanodes.
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Affiliation(s)
- Feng Pan
- Micro-Electronics Research Institute and School of Electronics and Information, Hangzhou Dianzi University, 1158, 2nd Street, Baiyang Street, Hangzhou, 310018, China
| | - Liyuan Long
- Micro-Electronics Research Institute and School of Electronics and Information, Hangzhou Dianzi University, 1158, 2nd Street, Baiyang Street, Hangzhou, 310018, China
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Zhenyu Li
- Micro-Electronics Research Institute and School of Electronics and Information, Hangzhou Dianzi University, 1158, 2nd Street, Baiyang Street, Hangzhou, 310018, China
| | - Shiming Yan
- Micro-Electronics Research Institute and School of Electronics and Information, Hangzhou Dianzi University, 1158, 2nd Street, Baiyang Street, Hangzhou, 310018, China
| | - Lei Wang
- Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, 441053, 296 Longzhong Road, Xiangyang, 441053, China
| | - Gangyang Lv
- Micro-Electronics Research Institute and School of Electronics and Information, Hangzhou Dianzi University, 1158, 2nd Street, Baiyang Street, Hangzhou, 310018, China
| | - Junjun Zhang
- Micro-Electronics Research Institute and School of Electronics and Information, Hangzhou Dianzi University, 1158, 2nd Street, Baiyang Street, Hangzhou, 310018, China
| | - Jiahui Chen
- Micro-Electronics Research Institute and School of Electronics and Information, Hangzhou Dianzi University, 1158, 2nd Street, Baiyang Street, Hangzhou, 310018, China
| | - Guijie Liang
- Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, 441053, 296 Longzhong Road, Xiangyang, 441053, China
| | - Dunhui Wang
- Micro-Electronics Research Institute and School of Electronics and Information, Hangzhou Dianzi University, 1158, 2nd Street, Baiyang Street, Hangzhou, 310018, China
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Goswami T, Yadav DK, Bhatt H, Kaur G, Ghosh HN. Temperature dependent charge carrier dynamics in 2D ternary Cu2MoS4 nanoflakes: An effect of electron-phonon coupling. J Chem Phys 2023; 159:174705. [PMID: 37921251 DOI: 10.1063/5.0165985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 10/09/2023] [Indexed: 11/04/2023] Open
Abstract
Two-dimensional transition metal chalcogenides (2D TMCs) like MoS2, WS2 etc., have established significant dominance in the field of nanoscience and nanotechnology, owing to their unique properties like strong light-matter interaction, high carrier mobility, large photo-responsivity etc. Despite the widespread utilization of these binary TMCs, their potential in the advancement of the optoelectronic research is limited due to the constraints in band tuning and charge carrier lifetime. To overcome these limitations, ternary transition metal chalcogenides have emerged as promising alternatives. Although, the optical properties of these materials have never been explored properly. Herein, we have investigated one such promising member of this group, Cu2MoS4 (CMS) using both steady state and time-resolved spectroscopic techniques. The material exhibits a broad range of visible light absorption, peaking at 576 nm. Photoluminescence spectroscopy confirmed the presence of both band gap emission and trap state-mediated emissions. Transient absorption spectroscopy unraveled the excited state charge carrier dynamics of CMS in sub-ps timescale, upon irradiation of visible light. We found significant influence of the trap mediated recombination, while Auger process being dominant at high charge density. We extended our study in a wide temperature range (5-300 K), which reveals the impact of electron-phonon coupling strength on the band gap and charge carrier dynamics of this material. This detailed study would draw more attention toward the unexplored optical properties of ternary 2D chalcogenides and will open new avenues for the construction of 2D material-based optical devices.
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Affiliation(s)
- Tanmay Goswami
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Punjab 140306, India
| | - Dharmendra Kumar Yadav
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Punjab 140306, India
| | - Himanshu Bhatt
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Punjab 140306, India
| | - Gurpreet Kaur
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Punjab 140306, India
| | - Hirendra N Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha 752050, India
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Heterojunction Design between WSe2 Nanosheets and TiO2 for Efficient Photocatalytic Hydrogen Generation. Catalysts 2022. [DOI: 10.3390/catal12121668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Design and fabrication of efficient and stable photocatalysts are critically required for practical applications of solar water splitting. Herein, a series of WSe2/TiO2 nanocomposites were constructed through a facile mechanical grinding method, and all of the nanocomposites exhibited boosted photocatalytic hydrogen evolution. It was discovered that the enhanced photocatalytic performance was attributed to the efficient electron transfer from TiO2 to WSe2 and the abundant active sites provided by WSe2 nanosheets. Moreover, the intimate heterojunction between WSe2 nanosheets and TiO2 favors the interfacial charge separation. As a result, a highest hydrogen evolution rate of 2.28 mmol/g·h, 114 times higher than pristine TiO2, was obtained when the weight ratio of WSe2/(WSe2 + TiO2) was adjusted to be 20%. The designed WSe2/TiO2 heterojunctions can be regarded as a promising photocatalysts for high-throughput hydrogen production.
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Ghosh HNATH, Goswami T, Bhatt H, Yadav DK. Atomically Thin 2D Photocatalysts for Boosted H2 Production from the perspective of Transient Absorption Spectroscopy. Phys Chem Chem Phys 2022; 24:19121-19143. [DOI: 10.1039/d2cp02148j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Excited state photophysical processes play the most important role in deciding the efficiency of any photonic applications like solar light driven H2 evolution, which is considered to be the next...
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