1
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Xiao Y, Guo Z, Cao J, Song P, Yang B, Xu W. Revealing operando surface defect-dependent electrocatalytic performance of Pt at the subparticle level. Proc Natl Acad Sci U S A 2024; 121:e2317205121. [PMID: 38776369 PMCID: PMC11145244 DOI: 10.1073/pnas.2317205121] [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: 10/04/2023] [Accepted: 04/18/2024] [Indexed: 05/25/2024] Open
Abstract
Understanding the operando defect-tuning performance of catalysts is critical to establish an accurate structure-activity relationship of a catalyst. Here, with the tool of single-molecule super-resolution fluorescence microscopy, by imaging intermediate CO formation/oxidation during the methanol oxidation reaction process on individual defective Pt nanotubes, we reveal that the fresh Pt ends with more defects are more active and anti-CO poisoning than fresh center areas with less defects, while such difference could be reversed after catalysis-induced step-by-step creation of more defects on the Pt surface. Further experimental results reveal an operando volcano relationship between the catalytic performance (activity and anti-CO ability) and the fine-tuned defect density. Systematic DFT calculations indicate that such an operando volcano relationship could be attributed to the defect-dependent transition state free energy and the accelerated surface reconstructing of defects or Pt-atom moving driven by the adsorption of the CO intermediate. These insights deepen our understanding to the operando defect-driven catalysis at single-molecule and subparticle level, which is able to help the design of highly efficient defect-based catalysts.
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Affiliation(s)
- Yi Xiao
- State Key Laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun130022, People’s Republic of China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui230026, People’s Republic of China
| | - Zhichao Guo
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, People’s Republic of China
| | - Jing Cao
- State Key Laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun130022, People’s Republic of China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui230026, People’s Republic of China
| | - Ping Song
- State Key Laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun130022, People’s Republic of China
| | - Bo Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, People’s Republic of China
| | - Weilin Xu
- State Key Laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun130022, People’s Republic of China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui230026, People’s Republic of China
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2
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Ou Y, Wang B, Xu N, Song Q, Liu T, Xu H, Wang F, Li S, Wang Y. Tandem Electric-Fields Prolong Energetic Hot Electrons Lifetime for Ultra-Fast and Stable NO 2 Detection. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2403215. [PMID: 38706406 DOI: 10.1002/adma.202403215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 04/22/2024] [Indexed: 05/07/2024]
Abstract
Prolonging energetic hot electrons lifetimes and surface activity in the reactive site can overcome the slow kinetics and unfavorable thermodynamics of photo-activated gas sensors. However, bulk and surface recombination limit the simultaneous optimization of both kinetics and thermodynamics. Here tandem electric fields are deployed at (111)/(100)Au-CeO2 to ensure a sufficient driving force for carrier transfer and elucidate the mechanism of the relationship between charge transport and gas-sensing performance. The asymmetric structure of the (111)/(100)CeO2 facet junction provides interior electric fields, which facilitates electron transfer from the (100)face to the (111)face. This separation of reduction and oxidation reaction sites across different crystal faces helps inhibit surface recombination. The increased electron concentration at the (111)face intensifies the interface electric field, which promotes electron transfer to the Au site. The local electric field generated by the surface plasmon resonance effect promotes the generation of high-energy energy hot-electrons, which maintains charge concentration in the interface field by injecting into (111)/(100)CeO2, thereby provide thermodynamic contributions and inhibit bulk recombination. The tandem electric fields enable the (111)/(100)Au-CeO2 to rapidly detect 5 ppm of NO2 at room temperature with stability maintained within 20 s.
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Affiliation(s)
- Yucheng Ou
- Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
| | - Bing Wang
- Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
| | - Nana Xu
- Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
| | - Quzhi Song
- Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
| | - Tao Liu
- Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
| | - Hui Xu
- Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
| | - Fuwen Wang
- Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
| | - Siwei Li
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
| | - Yingde Wang
- Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
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3
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Saqib M, Zafar M, Halawa MI, Murtaza S, Kamal GM, Xu G. Nanoscale Luminescence Imaging/Detection of Single Particles: State-of-the-Art and Future Prospects. ACS MEASUREMENT SCIENCE AU 2024; 4:3-24. [PMID: 38404493 PMCID: PMC10885340 DOI: 10.1021/acsmeasuresciau.3c00052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/28/2023] [Accepted: 11/13/2023] [Indexed: 02/27/2024]
Abstract
Single-particle-level measurements, during the reaction, avoid averaging effects that are inherent limitations of conventional ensemble strategies. It allows revealing structure-activity relationships beyond averaged properties by considering crucial particle-selective descriptors including structure/morphology dynamics, intrinsic heterogeneity, and dynamic fluctuations in reactivity (kinetics, mechanisms). In recent years, numerous luminescence (optical) techniques such as chemiluminescence (CL), electrochemiluminescence (ECL), and fluorescence (FL) microscopies have been emerging as dominant tools to achieve such measurements, owing to their diversified spectroscopy principles, noninvasive nature, higher sensitivity, and sufficient spatiotemporal resolution. Correspondingly, state-of-the-art methodologies and tools are being used for probing (real-time, operando, in situ) diverse applications of single particles in sensing, medicine, and catalysis. Herein, we provide a concise and comprehensive perspective on luminescence-based detection and imaging of single particles by putting special emphasis on their basic principles, mechanistic pathways, advances, challenges, and key applications. This Perspective focuses on the development of emission intensities and imaging based individual particle detection. Moreover, several key examples in the areas of sensing, motion, catalysis, energy, materials, and emerging trends in related areas are documented. We finally conclude with the opportunities and remaining challenges to stimulate further developments in this field.
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Affiliation(s)
- Muhammad Saqib
- Institute
of Chemistry, Khawaja Fareed University
of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
| | - Mariam Zafar
- Institute
of Chemistry, Khawaja Fareed University
of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
| | - Mohamed Ibrahim Halawa
- Department
of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
- Department
of Chemistry, College of Science, United
Arab Emirates University, Al Ain 15551, United Arab
Emirates
| | - Shahzad Murtaza
- Institute
of Chemistry, Khawaja Fareed University
of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
| | - Ghulam Mustafa Kamal
- Institute
of Chemistry, Khawaja Fareed University
of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
| | - Guobao Xu
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of
Sciences, 5625 Renmin
Street, Changchun, Jilin 130022, China
- School
of Applied Chemistry and Engineering, University
of Science and Technology of China, Hefei 230026, China
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4
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Valero R, Morales-García Á, Illas F. Estimating Nonradiative Excited-State Lifetimes in Photoactive Semiconducting Nanostructures. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:2713-2721. [PMID: 38379918 PMCID: PMC10875665 DOI: 10.1021/acs.jpcc.3c08053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/09/2024] [Accepted: 01/16/2024] [Indexed: 02/22/2024]
Abstract
The time evolution of the exciton generated by light adsorption in a photocatalyst is an important feature that can be approached from full nonadiabatic molecular dynamics simulations. Here, a crucial parameter is the nonradiative recombination rate between the hole and the electron that form the exciton. In the present work, we explore the performance of a Fermi's golden rule-based approach on predicting the recombination rate in a set of photoactive titania nanostructures, relying solely on the coupling of the ground and first excited state. In this scheme the analysis of the first excited state is carried out by invoking Kasha's rule thus avoiding computationally expensive nonadiabatic molecular dynamics simulations and resulting in an affordable estimate of the recombination rate. Our results show that, compared to previous ones from nonadiabatic molecular dynamics simulations, semiquantitative recombination rates can be predicted for the smaller titania nanostructures, and qualitative values are obtained from the larger ones. The present scheme is expected to be useful in the field of computational heterogeneous photocatalysis whenever a complex and computationally expensive full nonadiabatic molecular dynamics cannot be carried out.
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Affiliation(s)
- Rosendo Valero
- Departament
de Ciència de Materials i Química Física &
Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona. c/Martí i Franquès 1-11, 08028 Barcelona, Spain
- Headquarters
Research Institute, Zhejiang Huayou Cobalt, 018 Wuzhen East Rd, 314599 Jiaxing, Zhejiang, China
| | - Ángel Morales-García
- Departament
de Ciència de Materials i Química Física &
Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona. c/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Francesc Illas
- Departament
de Ciència de Materials i Química Física &
Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona. c/Martí i Franquès 1-11, 08028 Barcelona, Spain
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5
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Chen JJ. Interfacial Electron Transfer in Chemical and Biological Transformation of Pollutants in Environmental Catalysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:21540-21549. [PMID: 38086095 DOI: 10.1021/acs.est.3c05608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
Interfacial electron transfer (IET) is essential for chemical and biological transformation of pollutants, operative across diverse lengths and time scales. This Perspective presents an array of multiscale molecular simulation methodologies, supplemented by in situ monitoring and imaging techniques, serving as robust tools to decode IET enhancement mechanisms such as interface molecular modification, catalyst coordination mode, and atomic composition regulation. In addition, three IET-based pollutant transformation systems, an electrocatalytic oxidation system, a bioelectrochemical spatial coupling system, and an enzyme-inspired electrocatalytic system, were developed, demonstrating a high effect in transforming and degrading pollutants. To improve the effectiveness and scalability of IET-based strategies, the refinement of these systems is necessitated through rigorous research and theoretical exploration, particularly in the context of practical wastewater treatment scenarios. Future endeavors aim to elucidate the synergy between biological and chemical modules, edit the environmental functional microorganisms, and harness machine learning for designing advanced environmental catalysts to boost efficiency. This Perspective highlights the powerful potential of IET-focused environmental remediation strategies, emphasizing the critical role of interdisciplinary research in addressing the urgent global challenge of water pollution.
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Affiliation(s)
- Jie-Jie Chen
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
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6
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Shen M, Rackers WH, Sadtler B. Getting the Most Out of Fluorogenic Probes: Challenges and Opportunities in Using Single-Molecule Fluorescence to Image Electro- and Photocatalysis. CHEMICAL & BIOMEDICAL IMAGING 2023; 1:692-715. [PMID: 38037609 PMCID: PMC10685636 DOI: 10.1021/cbmi.3c00075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 10/04/2023] [Accepted: 10/07/2023] [Indexed: 12/02/2023]
Abstract
Single-molecule fluorescence microscopy enables the direct observation of individual reaction events at the surface of a catalyst. It has become a powerful tool to image in real time both intra- and interparticle heterogeneity among different nanoscale catalyst particles. Single-molecule fluorescence microscopy of heterogeneous catalysts relies on the detection of chemically activated fluorogenic probes that are converted from a nonfluorescent state into a highly fluorescent state through a reaction mediated at the catalyst surface. This review article describes challenges and opportunities in using such fluorogenic probes as proxies to develop structure-activity relationships in nanoscale electrocatalysts and photocatalysts. We compare single-molecule fluorescence microscopy to other microscopies for imaging catalysis in situ to highlight the distinct advantages and limitations of this technique. We describe correlative imaging between super-resolution activity maps obtained from multiple fluorogenic probes to understand the chemical origins behind spatial variations in activity that are frequently observed for nanoscale catalysts. Fluorogenic probes, originally developed for biological imaging, are introduced that can detect products such as carbon monoxide, nitrite, and ammonia, which are generated by electro- and photocatalysts for fuel production and environmental remediation. We conclude by describing how single-molecule imaging can provide mechanistic insights for a broader scope of catalytic systems, such as single-atom catalysts.
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Affiliation(s)
- Meikun Shen
- Department
of Chemistry and Biochemistry, University
of Oregon, Eugene, Oregon 97403, United States
| | - William H. Rackers
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Bryce Sadtler
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
- Institute
of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, United States
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7
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Wu S, Lee JK, Tan JWE, Chan JX, Xu R, Zhang Z. In Situ Quantitative Study of Single-Molecule Photoreduction Activities and Kinetics on 1D-1D Heterostructure. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2307057. [PMID: 37972278 DOI: 10.1002/smll.202307057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/30/2023] [Indexed: 11/19/2023]
Abstract
Understanding the underlying catalytic mechanisms with nanometer resolution is of critical importance to the rational design of 1D heterogeneous catalysts. However, a fundamental investigation of photocatalytic activities and kinetics at their individual sites is still challenging. Herein, in situ single-molecule fluorescence microscopy is employed to study the site-specific catalytic activities and dynamics on 1D-1D heterostructure for the first time. For carbon nanotube (CNT)/CdS nanorod composites, it is found that the CdS end with heterojunction exhibits the highest catalytic conversion rate constant of resazurin photoreduction, which is 30%, 7%, and 19% higher than those of the middle segment and the bare end of CdS, and the CNT end with heterojunction, respectively. A similar trend of adsorption abilities is observed in these structures. Such phenomena can be attributed to the different content of defects in these structures. Regarding the dissociation behaviors, the dissociation rate constants of all structures exhibit an opposite trend to those of adsorption and conversion. The direct and indirect dissociation are found to be predominant on CdS and CNT, respectively. Such investigation provides a deep insight into the understanding of site-specific properties on 1D heterogeneous catalysts and helps construct the "structure-dynamics" correlations at the nanoscale.
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Affiliation(s)
- Shuyang Wu
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Jinn-Kye Lee
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Joseph Wei En Tan
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Jia Xin Chan
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Rong Xu
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Zhengyang Zhang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
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8
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Wu G, Qian C, Lv WL, Zhao X, Liu XW. Dynamic imaging of interfacial electrochemistry on single Ag nanowires by azimuth-modulated plasmonic scattering interferometry. Nat Commun 2023; 14:4194. [PMID: 37443367 DOI: 10.1038/s41467-023-39866-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 06/28/2023] [Indexed: 07/15/2023] Open
Abstract
Direct visualization of surface chemical dynamics in solution is essential for understanding the mechanisms involved in nanocatalysis and electrochemistry; however, it is challenging to achieve high spatial and temporal resolution. Here, we present an azimuth-modulated plasmonic imaging technique capable of imaging dynamic interfacial changes. The method avoids strong interference from reflected light and consequently eliminates the parabolic-like interferometric patterns in the images, allowing for a 67-fold increase in the spatial resolution of plasmonic imaging. We demonstrate that this optical imaging approach enables comprehensive analyses of surface chemical dynamics and identification of previously unknown surface reaction heterogeneity by investigating electrochemical redox reactions over single silver nanowires as an example. This work provides a general strategy for high-resolution plasmonic imaging of surface electrochemical dynamics and other interfacial chemical reactions, complementing existing surface characterization methods.
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Affiliation(s)
- Gang Wu
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Chen Qian
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
| | - Wen-Li Lv
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Xiaona Zhao
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Xian-Wei Liu
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
- Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
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9
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Wang M, Zhou H, Wang F. Photocatalytic Production of Syngas from Biomass. Acc Chem Res 2023; 56:1057-1069. [PMID: 37043679 DOI: 10.1021/acs.accounts.3c00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
ConspectusAs a renewable solar energy and carbon carrier, biomass exploration has received global attention. Photocatalytic valorization of biomass into fuels and chemicals is a promising and sustainable method for future chemical production. Photocatalysis has the potential to accomplish reactions under ambient conditions due to the unique reaction mechanisms involving photoinduced charge carriers and has recently been recognized as an efficient and feasible technology for biomass conversion. Biomass is widely used as sacrificial agent to scavenge holes in photocatalytic hydrogen evolution, and the carbon is eventually degraded to CO2 with a minor amount of CO. The generation of CO instead of CO2 is more economical and promising but also a challenge under photoreforming conditions.This is a new research direction, while until now there has still been the lack of a comprehensive review article to summarize and provide prospects for this topic. This Account will highlight our contributions in the research direction of the photocatalytic reforming of biomass into syngas (CO + H2). In 2020, we first reported the photocatalytic conversion of biopolyols and sugars into syngas by employing a defect-rich Cu-TiO2 nanorod photocatalyst and found that formic acid is a key intermediate to CO. Further study revealed that a facet-dependent electron-trapping state on anatase TiO2 will affect the photocatalytic dehydration activity for formic acid intermediates by regulating the electron transfer process during the reaction, and the selective generation of FA or CO from photocatalytic biomass reforming was achieved via exposing the (100) or (101) facets, respectively. Visible light-driven syngas generation was further achieved over a CdS-based photocatalyst. Sulfate modification of CdS ([SO4]/CdS) was constructed as the proton acceptor, thus efficiently facilitating the proton-coupled electron transfer process. Besides, we put forward an oxygen-controlled strategy to increase the CO generation rate without a significant decrease in CO selectivity via controlling the O2/substrate ratio. Based on this system, a Z-scheme CdS@g-C3N4 core-shell structure and CdO-CdS semicoherent interface were created to facilitate charge transfer and enhance the O2 activation, thus increasing the CO generation rate. Moreover, we also developed a photoelectrochemical approach to separately produce CO and H2 from biomass. Nitrogen doping of a hexagonal WO3 nanowire array was used to produce the photoanode. The built-in electric field generated via nitrogen doping promoted charge transfer, hence improving the efficiency of PEC reforming of biopolyols and sugars. This Account will systematically analyze the challenges in this research direction, the reaction route in the photocatalytic biomass reforming, and the factors affecting CO selectivity and give insight into the design of efficient photocatalytic systems.
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Affiliation(s)
- Min Wang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Hongru Zhou
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Feng Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
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10
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Dery S, Friedman B, Shema H, Gross E. Mechanistic Insights Gained by High Spatial Resolution Reactivity Mapping of Homogeneous and Heterogeneous (Electro)Catalysts. Chem Rev 2023; 123:6003-6038. [PMID: 37037476 PMCID: PMC10176474 DOI: 10.1021/acs.chemrev.2c00867] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
The recent development of high spatial resolution microscopy and spectroscopy tools enabled reactivity analysis of homogeneous and heterogeneous (electro)catalysts at previously unattainable resolution and sensitivity. These techniques revealed that catalytic entities are more heterogeneous than expected and local variations in reaction mechanism due to divergences in the nature of active sites, such as their atomic properties, distribution, and accessibility, occur both in homogeneous and heterogeneous (electro)catalysts. In this review, we highlight recent insights in catalysis research that were attained by conducting high spatial resolution studies. The discussed case studies range from reactivity detection of single particles or single molecular catalysts, inter- and intraparticle communication analysis, and probing the influence of catalysts distribution and accessibility on the resulting reactivity. It is demonstrated that multiparticle and multisite reactivity analyses provide unique knowledge about reaction mechanism that could not have been attained by conducting ensemble-based, averaging, spectroscopy measurements. It is highlighted that the integration of spectroscopy and microscopy measurements under realistic reaction conditions will be essential to bridge the gap between model-system studies and real-world high spatial resolution reactivity analysis.
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Affiliation(s)
- Shahar Dery
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University, Jerusalem 91904, Israel
| | - Barak Friedman
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University, Jerusalem 91904, Israel
| | - Hadar Shema
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University, Jerusalem 91904, Israel
| | - Elad Gross
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University, Jerusalem 91904, Israel
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11
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Li H, Deng C, Zhu N, Zhang C, Zeng Q, Qin L. An ultrasensitive GSH-specific fluorescent probe unveils celastrol-induced ccRCC ferroptosis. Bioorg Chem 2023; 134:106454. [PMID: 36889199 DOI: 10.1016/j.bioorg.2023.106454] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/27/2022] [Accepted: 02/28/2023] [Indexed: 03/06/2023]
Abstract
Glutathione (GSH) is closely related to the occurrence and development of tumors. The intracellular GSH levels are abnormally altered when tumor cells undergo programmed cell death. Therefore, real-time monitoring of the dynamic changes of intracellular GSH levels can better enable the early diagnosis of diseases and evaluate the effects of cell death-inducing drugs. In this study, a stable and highly selective fluorescent probe AR has been designed and synthesized for the fluorescence imaging and rapid detection of GSH in vitro and in vivo, as well as patient-derived tumor tissue. More importantly, the AR probe can be used to track changes in GSH levels and fluorescence imaging during the treatment of clear cell renal cell carcinoma (ccRCC) with celastrol (CeT) via inducing ferroptosis. These findings demonstrate that the developed fluorescent probe AR exhibits high selectivity and sensitivity, as well as good biocompatibility and long-term stability, which can be used to image endogenous GSH in living tumors and cells. Also, a significant decrease in GSH levels was observed by the fluorescent probe AR during the treatment of ccRCC with CeT-induced ferroptosis in vitro and in vivo. Overall, these findings will provide a novel strategy for celastrol targeting ferroptosis in the treatment of ccRCC and the application of fluorescent probes to help reveal the underlying mechanism of CeT in the treatment of ccRCC.
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Affiliation(s)
- Hongfang Li
- Laboratory of Stem Cell Regulation with Chinese Medicine and Its Application, Hunan University of Chinese Medicine, Changsha 410208, China
| | - Changfeng Deng
- Laboratory of Stem Cell Regulation with Chinese Medicine and Its Application, Hunan University of Chinese Medicine, Changsha 410208, China
| | - Neng Zhu
- Department of Urology, The First Hospital of Hunan University of Chinese Medicine, Changsha 410007, China
| | - Chanjuan Zhang
- Laboratory of Stem Cell Regulation with Chinese Medicine and Its Application, Hunan University of Chinese Medicine, Changsha 410208, China
| | - Qing Zeng
- Laboratory of Stem Cell Regulation with Chinese Medicine and Its Application, Hunan University of Chinese Medicine, Changsha 410208, China
| | - Li Qin
- Laboratory of Stem Cell Regulation with Chinese Medicine and Its Application, Hunan University of Chinese Medicine, Changsha 410208, China; Institutional Key Laboratory of Vascular Biology and Translational Medicine in Hunan Province, Changsha, China; Hunan Province Engineering Research Center of Bioactive Substance Discovery of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China.
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12
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Xue J, Jiang S, Wang Z, Jiang Z, Cao H, Zhu X, Zhang Q, Luo Y, Bao J. Efficient Exciton Dissociation through the Edge Interfacial State in Metal Halide Perovskite-Based Photocatalysts. J Phys Chem Lett 2023; 14:1504-1511. [PMID: 36745060 DOI: 10.1021/acs.jpclett.2c03927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Metal halide perovskites (MHPs) with superior optoelectronic properties have recently been actively pursued as catalysts in heterogeneous photocatalysis. Dissociating excitons into charge carriers holds the key to enhancing the photocatalytic performance of MHP-based photocatalysts, especially for those with strong quantum-confinement effects. However, attaining efficient exciton dissociation has been rather challenging. Herein, we propose a novel concept that the edge interfacial state can trigger anisotropic electron transfer to promote exciton dissociation. By taking Cs4PbBr6/TiO2 mesocrystal heterojunction as a proof-of-concept, we demonstrate that the unique interfacial state at the edge of the system is generated by the defect-mediated chemical interaction and acts as a trap state, which brings on a directionally favored electron transfer from the center to edge regions, thereby significantly enhancing the desired exciton dissociation. Consequently, such a system achieves an excellent performance in photocatalytic CO2 reduction. This paradigmatic work sheds light on the excitonic aspects for rational design of advanced photocatalysts toward high performance.
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Affiliation(s)
- Jiawei Xue
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Shenlong Jiang
- Hefei National Research Center for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Zhiyu Wang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Zhiyong Jiang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Heng Cao
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Xiaodi Zhu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Qun Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230088, China
| | - Yi Luo
- Hefei National Research Center for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230088, China
| | - Jun Bao
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui 230029, China
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13
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Ji Y, Liu P, Fan T. Unifying the Nitrogen Reduction Activity of Anatase and Rutile TiO 2 Surfaces. Chemphyschem 2023; 24:e202200653. [PMID: 36195557 DOI: 10.1002/cphc.202200653] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/04/2022] [Indexed: 01/20/2023]
Abstract
TiO2 is a model transition metal oxide that has been applied frequently in both photocatalytic and electrocatalytic nitrogen reduction reactions (NRR). However, the phase which is more NRR active still remains a puzzle. This work presents a theoretical study on the NRR activity of the (001), (100), (101), and (110) surfaces of both anatase and rutile TiO2 . We found that perfect surfaces are not active for NRR, while the oxygen vacancy can promote the reaction by providing excess electrons and low-coordinated Ti atoms that enhance the binding of the key intermediate (HNN*). The NRR activity of the eight facets can be unified into a single scaling line. The anatase TiO2 (101) and rutile TiO2 (101) surfaces were found to be the most and the second most active surfaces with a limiting potential of -0.91 V and -0.95 V respectively, suggesting that the TiO2 NRR activity is not very phase-sensitive. For photocatalytic NRR, the results suggest that the anatase TiO2 (101) surface is still the most active facet. We further found that the binding strength of key intermediates scale well with the formation energy of oxygen vacancy, which is determined by the oxygen coordination number and the degree of relaxation of the surface after the creation of oxygen vacancy. This work provides a comprehensive understanding of the activity of TiO2 surfaces. The results should be helpful for the design of more efficient TiO2 -based NRR catalysts.
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Affiliation(s)
- Yongfei Ji
- School of Chemistry and Chemical Engineering, Guangzhou University, 230 Waihuanxi Road, Guangzhou, 510006, Guangdong, P. R. China
| | - Paiyong Liu
- School of Chemistry and Chemical Engineering, Guangzhou University, 230 Waihuanxi Road, Guangzhou, 510006, Guangdong, P. R. China
| | - Ting Fan
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, Guangdong, P. R. China
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14
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Zhao X, Zhou XL, Yang SY, Min Y, Chen JJ, Liu XW. Plasmonic imaging of the layer-dependent electrocatalytic activity of two-dimensional catalysts. Nat Commun 2022; 13:7869. [PMID: 36550149 PMCID: PMC9780338 DOI: 10.1038/s41467-022-35633-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
Studying the localized electrocatalytic activity of heterogeneous electrocatalysts is crucial for understanding electrocatalytic reactions and further improving their performance. However, correlating the electrocatalytic activity with the microscopic structure of two-dimensional (2D) electrocatalysts remains a great challenge due to the lack of in situ imaging techniques and methods of tuning structures with atomic precision. Here, we present a general method of probing the layer-dependent electrocatalytic activity of 2D materials in situ using a plasmonic imaging technique. Unlike the existing methods, this approach was used to visualize the surface charge density and electrocatalytic activity of single 2D MoS2 nanosheets, enabling the correlation of layer-dependent electrocatalytic activity with the surface charge density of single MoS2 nanosheets. This work provides insights into the electrocatalytic mechanisms of 2D transition metal dichalcogenides, and our approach can serve as a promising platform for investigating electrocatalytic reactions at the heterogeneous interface, thus guiding the rational design of high-performance electrocatalysts.
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Affiliation(s)
- Xiaona Zhao
- grid.59053.3a0000000121679639Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026 China
| | - Xiao-Li Zhou
- grid.59053.3a0000000121679639Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026 China ,grid.410579.e0000 0000 9116 9901School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094 China
| | - Si-Yu Yang
- grid.59053.3a0000000121679639Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026 China
| | - Yuan Min
- grid.59053.3a0000000121679639Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026 China
| | - Jie-Jie Chen
- grid.59053.3a0000000121679639Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026 China
| | - Xian-Wei Liu
- grid.59053.3a0000000121679639Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026 China ,grid.59053.3a0000000121679639Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026 China
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15
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Sustainable organic synthesis promoted on titanium dioxide using coordinated water and renewable energies/resources. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214773] [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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16
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Zhou H, Wang M, Kong F, Chen Z, Dou Z, Wang F. Facet-Dependent Electron Transfer Regulates Photocatalytic Valorization of Biopolyols. J Am Chem Soc 2022; 144:21224-21231. [DOI: 10.1021/jacs.2c08655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hongru Zhou
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Min Wang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Fanhao Kong
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Zhiwei Chen
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Zhaolin Dou
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, Liaoning, China
| | - Feng Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian116023, Liaoning, China
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17
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Xiao Y, Xu W. Single-molecule fluorescence imaging for probing nanocatalytic process. Chem 2022. [DOI: 10.1016/j.chempr.2022.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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18
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Li B, Tong F, Lv M, Wang Z, Liu Y, Wang P, Cheng H, Dai Y, Zheng Z, Huang B. In Situ Monitoring Charge Transfer on Topotactic Epitaxial Heterointerface for Tetracycline Degradation at the Single-Particle Level. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bei Li
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Fengxia Tong
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Min Lv
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Zeyan Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Yuanyuan Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Peng Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Hefeng Cheng
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Ying Dai
- School of Physics, Shandong University, Jinan 250100, China
| | - Zhaoke Zheng
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Baibiao Huang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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19
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Wu B, Cheng Z, Hou Y, Chen Q, Wang X, Qiao B, Chen D, Tu J. Engineering exposed vertical nano-TiO 2 (001) facets/BiOI nanosheet heterojunction film for constructing a satisfactory PEC glucose oxidase biosensor. RSC Adv 2022; 12:19495-19504. [PMID: 35865570 PMCID: PMC9255561 DOI: 10.1039/d2ra03070e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 06/23/2022] [Indexed: 12/05/2022] Open
Abstract
In the field of photoelectrochemical (PEC) enzyme biosensors, constructing efficient photoelectrodes, in which the recombination of photogenerated carriers is an important factor affecting the performance, is of great significance. Herein, to enhance the separation efficiency of photogenerated carriers, titanium dioxide (TiO2) nanosheet (NS)/bismuth oxyiodide (BiOI) NS/glucose oxidase (GOx) composites were prepared via hydrothermal and solvothermal methods. Single-crystal anatase TiO2 NSs with a high percentage of (001) facets lead to better photocarrier separation due to heterojunctions between facets. After coupling with BiOI NSs, the photoelectrochemical performance of the electrode was greatly improved. The photogenerated electrons from TiO2 and BiOI gathered at TiO2 (101) and were exported through the fluorine-doped tin oxide (FTO) substrate to generate electrical signals. Photogenerated holes were transferred to TiO2 (001) and BiOI to participate in the enzymatic reaction, showing the outstanding separation of electrons and holes. The prepared TiO2 NS/BiOI NS/GOx glucose biosensor achieved satisfactory results, with sensitivity of 14.25 μA mM−1 cm−2, a linear measurement range of 0–1 mM, and a limit of detection (3S/N) of 0.01 mM in phosphate buffered saline (PBS) at a pH of 7.4. The mechanism for the efficient separation of photogenerated carriers based on the facet heterojunctions introduced in this paper also provides new insights into other optoelectronic biosensors. Demonstration of the mechanism based on the synergistic effect of TiO2 facet heterojunctions and TiO2/BiOI heterojunctions to promote efficient separation of photogenerated carriers.![]()
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Affiliation(s)
- Baiqiang Wu
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University Haikou 570228 China
| | - Zike Cheng
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University Haikou 570228 China
| | - Yao Hou
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University Haikou 570228 China
| | - Qian Chen
- Department of Clinical Laboratory, The First Affiliated Hospital of Hainan Medical University Haikou 570102 China
| | - Xiaohong Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University Haikou 570228 China
| | - Bin Qiao
- Department of Clinical Laboratory of the Second Affiliated Hospital, School of Tropical Medicine, Key Laboratory of Emergency and Trauma of Ministry of Education, Research Unit of Island Emergency Medicine, Chinese Academy of Medical Sciences (No. 2019RU013), Hainan Medical University Haikou 571199 China
| | - Delun Chen
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University Haikou 570228 China
| | - Jinchun Tu
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University Haikou 570228 China
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20
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Shen M, Ding T, Tan C, Rackers WH, Zhang D, Lew MD, Sadtler B. In Situ Imaging of Catalytic Reactions on Tungsten Oxide Nanowires Connects Surface-Ligand Redox Chemistry with Photocatalytic Activity. NANO LETTERS 2022; 22:4694-4701. [PMID: 35674669 DOI: 10.1021/acs.nanolett.2c00674] [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] [Indexed: 06/15/2023]
Abstract
Semiconductor nanocrystals are promising candidates for generating chemical feedstocks through photocatalysis. Understanding the role of ligands used to prepare colloidal nanocrystals in catalysis is challenging due to the complexity and heterogeneity of nanocrystal surfaces. We use in situ single-molecule fluorescence imaging to map the spatial distribution of active regions along individual tungsten oxide nanowires before and after functionalizing them with ascorbic acid. Rather than blocking active sites, we observed a significant enhancement in activity for photocatalytic water oxidation after treatment with ascorbic acid. While the initial nanowires contain inactive regions dispersed along their length, the functionalized nanowires show high uniformity in their photocatalytic activity. Spatial colocalization of the active regions with their surface chemical properties shows that oxidation of ascorbic acid during photocatalysis generates new oxygen vacancies along the nanowire surface. We demonstrate that controlling surface-ligand redox chemistry during photocatalysis can enhance the active site concentration on nanocrystal catalysts.
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Affiliation(s)
- Meikun Shen
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Tianben Ding
- Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - Che Tan
- Department of Energy, Environmental, and Chemical Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - William H Rackers
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Dongyan Zhang
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Matthew D Lew
- Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63130, United States
- Institute of Materials Science and Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - Bryce Sadtler
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
- Institute of Materials Science and Engineering, Washington University, St. Louis, Missouri 63130, United States
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21
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Shi X, Dai C, Wang X, Hu J, Zhang J, Zheng L, Mao L, Zheng H, Zhu M. Protruding Pt single-sites on hexagonal ZnIn 2S 4 to accelerate photocatalytic hydrogen evolution. Nat Commun 2022; 13:1287. [PMID: 35277495 PMCID: PMC8917206 DOI: 10.1038/s41467-022-28995-1] [Citation(s) in RCA: 73] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 02/15/2022] [Indexed: 12/15/2022] Open
Abstract
Single-site cocatalysts engineered on supports offer a cost-efficient pathway to utilize precious metals, yet improving the performance further with minimal catalyst loading is still highly desirable. Here we have conducted a photochemical reaction to stabilize ultralow Pt co-catalysts (0.26 wt%) onto the basal plane of hexagonal ZnIn2S4 nanosheets (PtSS-ZIS) to form a Pt-S3 protrusion tetrahedron coordination structure. Compared with the traditional defect-trapped Pt single-site counterparts, the protruding Pt single-sites on h-ZIS photocatalyst enhance the H2 evolution yield rate by a factor of 2.2, which could reach 17.5 mmol g−1 h−1 under visible light irradiation. Importantly, through simple drop-casting, a thin PtSS-ZIS film is prepared, and large amount of observable H2 bubbles are generated, providing great potential for practical solar-light-driven H2 production. The protruding single Pt atoms in PtSS-ZIS could inhibit the recombination of electron-hole pairs and cause a tip effect to optimize the adsorption/desorption behavior of H through effective proton mass transfer, which synergistically promote reaction thermodynamics and kinetics. An alternative approach to defect-trapped Pt single-sites on a semiconductor is reported. Here, protruding Pt sites inhibit charge recombination and cause a tip effect which enhances H2 evolution yield rates with minimal co-catalyst loading.
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Affiliation(s)
- Xiaowei Shi
- Department of Applied Chemistry, Zhejiang University of Technology, 310032, Hangzhou, P.R. China
| | - Chao Dai
- Department of Applied Chemistry, Zhejiang University of Technology, 310032, Hangzhou, P.R. China
| | - Xin Wang
- Department of Applied Chemistry, Zhejiang University of Technology, 310032, Hangzhou, P.R. China
| | - Jiayue Hu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, 511443, Guangzhou, P.R. China
| | - Junying Zhang
- School of Physics, Beihang University, 100191, Beijing, P.R. China
| | - Lingxia Zheng
- Department of Applied Chemistry, Zhejiang University of Technology, 310032, Hangzhou, P.R. China
| | - Liang Mao
- School of Materials Science and Physics, China University of Mining and Technology, 221116, Xuzhou, P.R. China.
| | - Huajun Zheng
- Department of Applied Chemistry, Zhejiang University of Technology, 310032, Hangzhou, P.R. China.
| | - Mingshan Zhu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, 511443, Guangzhou, P.R. China.
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22
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23
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Zhang L, Jin Z, Tsubaki N. Zeolitic Imidazolate Framework-67-Derived P-Doped Hollow Porous Co 3O 4 as a Photocatalyst for Hydrogen Production from Water. ACS APPLIED MATERIALS & INTERFACES 2021; 13:50996-51007. [PMID: 34677052 DOI: 10.1021/acsami.1c14987] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As a part of photocatalytic water splitting, the design of low-cost, high-activity catalysts plays an essential role in the development of photocatalytic water splitting. Metal oxides have the advantages of a wide range of sources, many varieties, and easy preparation. Doping engineering on their surface can construct new active sites and adjust their catalytic activity. In this work, a new strategy was developed through anion hybridization to regulate electron delocalization. Using one of the cobalt-based zeolitic imidazole skeletons (ZIF-67) as a precursor material, a two-step calcination method was used to prepare a P-doped Co3O4 mixed anion composite photocatalyst. The hydrogen production rate of P@Co3O4 is 39 times that of ZIF-67 and 6.8 times that of Co3O4. Through density functional theory (DFT) calculations, the electron delocalization state of the sample surface is predicted and the reaction energy barrier is reduced to promote the process of the hydrogen evolution reaction (HER). The special O(δ-)-Co(δ+)-P(δ-) surface bonding state promotes the bridging of isolated electronic states and provides active sites for the adsorption and activation of reaction substrates. The improved electron transport pathway and the synergy between the catalytic sites under the high electron transport rate are the main reasons for the enhanced photocatalytic hydrogen evolution activity. This strategy, including changing the surface bond state and optimizing the structure and composition of the catalyst not only provides a new method for preparing other MOF-derived nanomaterials with porous structures but also inspires the reasonable development of other MOF-based advanced photocatalysts.
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Affiliation(s)
- Lijun Zhang
- Department of Applied Chemistry, Graduate School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Zhiliang Jin
- School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, P. R. China
| | - Noritatsu Tsubaki
- Department of Applied Chemistry, Graduate School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
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24
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Zeng J, Li Z, Jiang H, Wang X. Progress on photocatalytic semiconductor hybrids for bacterial inactivation. MATERIALS HORIZONS 2021; 8:2964-3008. [PMID: 34609391 DOI: 10.1039/d1mh00773d] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Due to its use of green and renewable energy and negligible bacterial resistance, photocatalytic bacterial inactivation is to be considered a promising sterilization process. Herein, we explore the relevant mechanisms of the photoinduced process on the active sites of semiconductors with an emphasis on the active sites of semiconductors, the photoexcited electron transfer, ROS-induced toxicity and interactions between semiconductors and bacteria. Pristine semiconductors such as metal oxides (TiO2 and ZnO) have been widely reported; however, they suffer some drawbacks such as narrow optical response and high photogenerated carrier recombination. Herein, some typical modification strategies will be discussed including noble metal doping, ion doping, hybrid heterojunctions and dye sensitization. Besides, the biosafety and biocompatibility issues of semiconductor materials are also considered for the evaluation of their potential for further biomedical applications. Furthermore, 2D materials have become promising candidates in recent years due to their wide optical response to NIR light, superior antibacterial activity and favorable biocompatibility. Besides, the current research limitations and challenges are illustrated to introduce the appealing directions and design considerations for the future development of photocatalytic semiconductors for antibacterial applications.
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Affiliation(s)
- Jiayu Zeng
- State Key Laboratory of Bioelectronics (Chien-Shiung Wu Lab), School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Ziming Li
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hui Jiang
- State Key Laboratory of Bioelectronics (Chien-Shiung Wu Lab), School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Xuemei Wang
- State Key Laboratory of Bioelectronics (Chien-Shiung Wu Lab), School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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25
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Su H, Wang W. Dynamically Monitoring the Photodeposition of Single Cocatalyst Nanoparticles on Semiconductors via Fluorescence Imaging. Anal Chem 2021; 93:11915-11919. [PMID: 34424667 DOI: 10.1021/acs.analchem.1c01908] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Loading of cocatalysts through photodeposition has been considered as one of the most promising methods to improve the photocatalytic activities of semiconductors, because of the advantages of intimate contact, easy preparation, and site-directed loading. While extensive efforts have been made to characterize the cocatalysts after synthesis, the growth kinetics of cocatalysts during photodeposition is largely a black box, thus leading to relatively empirical optimizations on the loading strategies of cocatalysts to date. Herein, we dynamically imaged the photodeposition of single cocatalysts on semiconductors via a wide-field fluorescence (FL) microscope, utilizing g-C3N4 sheets and CdS nanowires as models. This capability was based on the quenching effect of cocatalysts on the intrinsic FL emission of semiconductors. Single cocatalyst study revealed that FL emission of photocatalysts decayed monoexponentially during photodeposition, and cocatalysts possessed a self-limited growth. The significant heterogeneities (differences) of cocatalysts during photodeposition were also uncovered, regarding the apparent induction time, deposition rate and FL quenching amplitude. These informations were difficult to be accessed using the ex situ characterization. Programmable photodeposition and dissolution of CoxP were also realized, utilizing a focused laser beam with a spot size of <1 μm. This work explored the hidden details of the growth of cocatalysts during photodeposition, opening up a new avenue to optimize photodeposition for rationally designing more efficient photocatalysts.
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Affiliation(s)
- Hua Su
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Wei Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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26
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Shen M, Ding T, Rackers WH, Tan C, Mahmood K, Lew MD, Sadtler B. Single-Molecule Colocalization of Redox Reactions on Semiconductor Photocatalysts Connects Surface Heterogeneity and Charge-Carrier Separation in Bismuth Oxybromide. J Am Chem Soc 2021; 143:11393-11403. [PMID: 34284584 DOI: 10.1021/jacs.1c02377] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The surface structure of semiconductor photocatalysts controls the efficiency of charge-carrier extraction during photocatalytic reactions. However, understanding the connection between surface heterogeneity and the locations where photogenerated charge carriers are preferentially extracted is challenging. Herein we use single-molecule fluorescence imaging to map the spatial distribution of active regions and quantify the activity for both photocatalytic oxidation and reduction reactions on individual bismuth oxybromide (BiOBr) nanoplates. Through a coordinate-based colocalization analysis, we quantify the spatial correlation between the locations where fluorogenic probe molecules are oxidized and reduced on the surface of individual nanoplates. Surprisingly, we observed two distinct photochemical behaviors for BiOBr particles prepared within the same batch, which exhibit either predominantly uncorrelated activity where electrons and holes are extracted from different sites or colocalized activity in which oxidation and reduction take place within the same nanoscale regions. By analyzing the emissive properties of the fluorogenic probes, we propose that electrons and holes colocalize at defect-deficient regions, while defects promote the selective extraction of one carrier type by trapping either electrons or holes. Although previous work has used defect engineering to enhance the activity of bismuth oxyhalides and other semiconductor photocatalysts for useful reductive half-reactions (e.g., CO2 or N2 reduction), our results show that defect-free regions are needed to promote both oxidation and reduction in fuel-generating photocatalysts that do not rely on sacrificial reagents.
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Affiliation(s)
- Meikun Shen
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Tianben Ding
- Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - William H Rackers
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Che Tan
- Department of Energy, Environmental & Chemical Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - Khalid Mahmood
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Matthew D Lew
- Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63130, United States.,Institute of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - Bryce Sadtler
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States.,Institute of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, United States
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27
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Affiliation(s)
- Yi Xiao
- State Key Laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences 5625 Renmin Street, Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
| | - Weilin Xu
- State Key Laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences 5625 Renmin Street, Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
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28
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Wang K, Qian M, Qi H, Gao Q, Zhang C. Single
Particle‐Based
Confocal Laser Scanning Microscopy for Visual Detection of Copper Ions in Confined Space
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ke Wang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University Xi'an Shaanxi 710062 China
| | - Manping Qian
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University Xi'an Shaanxi 710062 China
| | - Honglan Qi
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University Xi'an Shaanxi 710062 China
| | - Qiang Gao
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University Xi'an Shaanxi 710062 China
| | - Chengxiao Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University Xi'an Shaanxi 710062 China
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29
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Su H, Niu B, Li H, Liu F, Yuan T, Chen HY, Wang W. Evanescent Wave-Guided Growth of an Organic Supramolecular Nanowire Array. Angew Chem Int Ed Engl 2020; 59:19209-19214. [PMID: 32677328 DOI: 10.1002/anie.202007319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/12/2020] [Indexed: 12/13/2022]
Abstract
The ordered assembly of molecules within a specific space of nanoscale, such as a surface, holds great promise in advanced micro-/nanostructure fabrication for various applications. Herein, we demonstrate the evanescent wave (EW)-guided organization of small molecules into a long-range ordered nanowire (NW) array. Experiment and simulation revealed that the orientation and periodicity of the NW array were feasibly regulated by altering the propagation direction and the wavelength of EW. The generality of this approach was demonstrated by using different molecule precursors. While existing studies on EW often took advantages of its near-field property for optical sensing, this work demonstrated the photochemical power of EW in the guided-assembly of small molecules for the first time. It also provides an enlightening avenue to periodic structure with fluorescence, promising for super-resolution microscopy and important devices applicable to optical and bio-related fields.
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Affiliation(s)
- Hua Su
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Ben Niu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Haoran Li
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Fei Liu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Tinglian Yuan
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Hong-Yuan Chen
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Wei Wang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, Jiangsu, 210023, China
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30
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Su H, Niu B, Li H, Liu F, Yuan T, Chen H, Wang W. Evanescent Wave‐Guided Growth of an Organic Supramolecular Nanowire Array. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hua Su
- School of Chemistry and Chemical Engineering State Key Laboratory of Analytical Chemistry for Life Science Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University Nanjing Jiangsu 210023 China
| | - Ben Niu
- School of Chemistry and Chemical Engineering State Key Laboratory of Analytical Chemistry for Life Science Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University Nanjing Jiangsu 210023 China
| | - Haoran Li
- School of Chemistry and Chemical Engineering State Key Laboratory of Analytical Chemistry for Life Science Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University Nanjing Jiangsu 210023 China
| | - Fei Liu
- School of Chemistry and Chemical Engineering State Key Laboratory of Analytical Chemistry for Life Science Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University Nanjing Jiangsu 210023 China
| | - Tinglian Yuan
- School of Chemistry and Chemical Engineering State Key Laboratory of Analytical Chemistry for Life Science Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University Nanjing Jiangsu 210023 China
| | - Hong‐Yuan Chen
- School of Chemistry and Chemical Engineering State Key Laboratory of Analytical Chemistry for Life Science Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University Nanjing Jiangsu 210023 China
| | - Wei Wang
- School of Chemistry and Chemical Engineering State Key Laboratory of Analytical Chemistry for Life Science Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University Nanjing Jiangsu 210023 China
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31
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Yu Y, Tan P, Huang X, Tao J, Liu Y, Zeng RJ, Chen M, Zhou S. Homogeneous activation of peroxymonosulfate using a low-dosage cross-bridged cyclam manganese(II) complex for organic pollutant degradation via a nonradical pathway. JOURNAL OF HAZARDOUS MATERIALS 2020; 394:122560. [PMID: 32220704 DOI: 10.1016/j.jhazmat.2020.122560] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/08/2020] [Accepted: 03/16/2020] [Indexed: 06/10/2023]
Abstract
The high dosage of catalyst requirement and weak anti-interference ability limit current heterogeneous manganese (Mn) catalyst/peroxymonosulfate (PMS) systems to remediate the organic polluted wastewater in complicated environment. Inspired by the concept of atom economy, herein, a homogenous manganese complex bearing a cross-bridged cyclam ligand Mn(cbc)Cl2 (MnL, L = cbc = 4,11-dimethyl-1,4,8,11-tetraazabicyclo[6.6.2]hexadecane)) is capable of activating PMS for reactive brilliant red K-2BP (RBR K-2BP) degradation. The dosage of MnL for PMS activation was low, in a range of 0.38∼3.8 mg/L. The quenching experiments demonstrated that the degradation was a nonradical-controlled process. Using methyl phenyl sulfoxide (PMSO) as a probe, the dominated degradation process of substrate was via an oxygen transfer pathway. Moreover, a high-valent Mn-oxo [(O)MnVLCl2]+ was directly detected using electrospray ionization mass spectrometry (ESI/MS). This system showed excellent anti-interference ability to both anions and humic acid, a typical natural organic matter. The atom economy, represented by an index ((mg pollutant)/h/(g catalyst)), showed that MnL 22737 in PMS activation was much higher than those of Mn-based heterogeneous catalytic systems 67∼960 and was only behind that of iron-tetraamidomacrocyclic ligand Fe-TAML 59139. This work provides insights into designing an atom-economic Mn-based PMS activator for efficient treatments for organic pollutants in a complicated environment.
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Affiliation(s)
- Yuqing Yu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Peng Tan
- Power China Water Environment Governance, Shenzhen, 518102, China
| | - Xinjue Huang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Junjie Tao
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Yingying Liu
- Department of Chemistry and Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, 999077, Hong Kong, China
| | - Raymond Jianxiong Zeng
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Man Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China.
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
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32
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Chen T, Tong F, Enderlein J, Zheng Z. Plasmon-Driven Modulation of Reaction Pathways of Individual Pt-Modified Au Nanorods. NANO LETTERS 2020; 20:3326-3330. [PMID: 32315532 DOI: 10.1021/acs.nanolett.0c00206] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Understanding the underlying kinetic mechanism of plasmon-enhanced catalysis is important for designing optimized bimetal nanostructures. Here, we characterize product formation rate at both the single-particle and ensemble level. The single-particle measurement allows us to reveal the underlying catalytic kinetic mechanisms of a bimetal nanostructure. Combining this with ensemble observations of two different catalytic behaviors of this catalyst with and without illumination shows that energetic charge carriers induce a transition from a competitive reactant adsorption type to a noncompetitive adsorption type, which leads to the suppression of catalytic rate decay at high reactant concentration. Theoretical modeling as well as analysis of hole acceptability of scavengers on Pt and Au surfaces indicates that the Pt light absorptivity is enhanced near Au and the energetic charges may form directly from the Pt part of the Au-Pt nanostructure. The presented study deepens our understanding of plasmon-enhanced catalysis by bimetal nanostructures.
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Affiliation(s)
- Tao Chen
- III. Institute of Physics - Biophysics, Georg August Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Fengxia Tong
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Jörg Enderlein
- III. Institute of Physics - Biophysics, Georg August Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Zhaoke Zheng
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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33
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Chen M, Zhou X, Chen X, Cai Q, Zeng RJ, Zhou S. Mechanisms of nitrous oxide emission during photoelectrotrophic denitrification by self-photosensitized Thiobacillus denitrificans. WATER RESEARCH 2020; 172:115501. [PMID: 31954933 DOI: 10.1016/j.watres.2020.115501] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/31/2019] [Accepted: 01/10/2020] [Indexed: 06/10/2023]
Abstract
Photoelectrotrophic denitrification (PEDeN) using bio-hybrids has the potential to remove nitrate (NO3-) from wastewater in an economical and sustainable way. As a gas of global concern, the mechanisms of nitrous oxide (N2O) emissions during this novel process remain unclear. Herein, a self-photosensitized bio-hybrid, i. e., Thiobacillus denitrificans-cadmium sulfide, was constructed and the factors affecting N2O emissions during PEDeN by the bio-hybrids were investigated. The system was sensitive to the input NO3--N and NO2--N, resulting in changes in the N2O/(N2+N2O) ratio from 1% to 95%. In addition to free nitrous acid (FNA), reactive oxidative species (ROS) were a unique factor affecting N2O emission during PEDeN. Importantly, the N2O reduction step exhibited greater susceptibility to the ROS than nitrate reduction step. The contributions of hydrogen peroxide (H2O2), superoxides (O2-•), hydroxyl radicals (•OH) and FNA to the inhibition of N2O reduction were >15.0%, >5.4%, 1.3%, and <70.2%, respectively for a reduction of 13.5 mg/L NO3--N. A significant down-regulation of the relative transcription of the gene nosZ demonstrated that the inhibition of N2O reductase occurred at the gene level. This finding has important implications not only for mitigating N2O emissions during the PEDeN process but also for encouraging a reexamination process of N2O emissions in nature, particularly in systems in which ROS are present during the denitrification process.
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Affiliation(s)
- Man Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Xiaofang Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Xiangyu Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Quanhua Cai
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Raymond Jianxiong Zeng
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China.
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34
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Han S, Niu Q, Qin N, Gu X, Zhang YN, Zhao G. In situ growth of M-{001}TiO2/Ti photoelectrodes: synergetic dominant {001} facets and ratio-optimal surface junctions for the effective oxidation of environmental pollutants. Chem Commun (Camb) 2020; 56:1337-1340. [DOI: 10.1039/c9cc09296j] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Engineering synergetic dominated {001} facet and ratio-optimally surface junctions on TiO2 photoelectrode for effective oxidation of environment pollutants.
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Affiliation(s)
- Shengnan Han
- School of Chemical Science and Engineering
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Key Laboratory of Yangtze River Water Environment
- Tongji University
- Shanghai 200092
| | - Qiongyan Niu
- School of Chemical Science and Engineering
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Key Laboratory of Yangtze River Water Environment
- Tongji University
- Shanghai 200092
| | - Ning Qin
- Department of Mechanical Engineering
- City University of Hong Kong
- Kowloon
- People's Republic of China
- Department of Materials Science and Engineering
| | - Xiaotong Gu
- School of Chemical Science and Engineering
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Key Laboratory of Yangtze River Water Environment
- Tongji University
- Shanghai 200092
| | - Ya-nan Zhang
- School of Chemical Science and Engineering
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Key Laboratory of Yangtze River Water Environment
- Tongji University
- Shanghai 200092
| | - Guohua Zhao
- School of Chemical Science and Engineering
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Key Laboratory of Yangtze River Water Environment
- Tongji University
- Shanghai 200092
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35
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Valero R, Morales-García Á, Illas F. Investigating the character of excited states in TiO2 nanoparticles from topological descriptors: implications for photocatalysis. Phys Chem Chem Phys 2020; 22:3017-3029. [DOI: 10.1039/c9cp05526f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Excited state topological descriptors based on the attachment/detachment one-electron charge density are used to investigate the centroids of photoactive TiO2 nanoclusters and nanoparticles.
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Affiliation(s)
- Rosendo Valero
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Ángel Morales-García
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
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