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Yang J, Ascrizzi E, Cattelan M, Nalesso M, Cielo L, Matvija P, Sedona F, Ferrari AM, Agnoli S. Atomic-Scale View of Water Chemistry on Nanostructured Iron Oxide Films. NANO LETTERS 2024. [PMID: 39302642 DOI: 10.1021/acs.nanolett.4c03521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
The interaction of water with solid surfaces is crucial for a wide range of disciplines, including catalysis, environmental science, corrosion, geology, and biology. In this study, we present a combined experimental and theoretical investigation that elucidates the interaction of water with a model iron oxide surface under near ambient conditions (i.e., room temperature and water vapor in the mbar range). Our findings reveal that surface hydroxylation can be controlled at the nanoscale by the local properties of the oxide film, such as local rumpling and electrostatic potential. The iron oxide surface presents alternating hydrophilic and hydrophobic domains, creating after water exposure a hexagonal pattern with a pitch of approximately 3 nm, where the highly hydroxylated regions act as nucleation centers for nanoconfined water molecule clusters.
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Affiliation(s)
- Jijin Yang
- Department of Chemical Sciences, University of Padova, Padova 35131, Italy
| | | | - Mattia Cattelan
- Department of Chemical Sciences, University of Padova, Padova 35131, Italy
- INSTM Istituto Nazionale Scienza e Tecnologia dei Materiali, Padova Research Unit, Firenze 50121, Italy
- CIRCC Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi, Padova Research Unit, Bari 70126, Italy
| | - Marco Nalesso
- Department of Chemical Sciences, University of Padova, Padova 35131, Italy
| | - Leonardo Cielo
- Department of Chemical Sciences, University of Padova, Padova 35131, Italy
| | - Peter Matvija
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague 8 CZ-18000, Czech Republic
| | - Francesco Sedona
- Department of Chemical Sciences, University of Padova, Padova 35131, Italy
| | | | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Padova 35131, Italy
- INSTM Istituto Nazionale Scienza e Tecnologia dei Materiali, Padova Research Unit, Firenze 50121, Italy
- CIRCC Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi, Padova Research Unit, Bari 70126, Italy
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2
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Zheng S, Shen Q, Chen Q, Lu C, Sheng J, Li Y, Yang H. Construction of stable photo-Fenton system with efficient removal capability of ciprofloxacin by accelerating in-situ photoreduction of Fe 3+ in MIL-100(Fe). ENVIRONMENTAL TECHNOLOGY 2024; 45:4635-4644. [PMID: 38329084 DOI: 10.1080/09593330.2023.2283049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 03/17/2023] [Indexed: 02/09/2024]
Abstract
Well-dispersed MIL-100(Fe) nanoparticles were synthesized under mild conditions and used to construct a photo-Fenton system (VMH system) with the assistance of visible-light irradiation and hydrogen peroxide. In such a VMH system, the MIL-100(Fe) has a high specific surface area and provides numerous Fe3+ active sites, thus accelerating the reaction of Fe3+ with photo-generated electrons under visible-light irradiation and generates Fe2+, and then the acquired Fe2+ can activate H2O2 to generate ⋅OH, accompanying with the oxidation of Fe2+ to Fe3+. Hence, the in-situ recycling of Fe2+/Fe3+ promotes the generation of ·OH, thus making the VMH system exhibits promising photocatalytic activity. The removal rate of ciprofloxacin in the VMH system is as high as 95.2% within 120 min photo-Fenton reaction, which is about 26 times higher than that of the Visible light/MIL-100(Fe) system. Moreover, the VMH system also exhibits strong degradation ability to other typical antibiotics, such as tetracycline, norfloxacin and cephalexin, and maintains high cyclic stability, revealing great practical application potential in the purification of antibiotic wastewater.
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Affiliation(s)
- Suhua Zheng
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Qianhong Shen
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
- Zhejiang-California International NanoSystems Institute, Zhejiang University, Hangzhou, People's Republic of China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, People's Republic of China
| | - Qifeng Chen
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Chengqi Lu
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Jiansong Sheng
- Zhejiang-California International NanoSystems Institute, Zhejiang University, Hangzhou, People's Republic of China
| | - Yue Li
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
- Zhejiang-California International NanoSystems Institute, Zhejiang University, Hangzhou, People's Republic of China
| | - Hui Yang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
- Zhejiang-California International NanoSystems Institute, Zhejiang University, Hangzhou, People's Republic of China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, People's Republic of China
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van Limpt RTM, Lao M, Tsampas MN, Creatore M. Unraveling the Role of the Stoichiometry of Atomic Layer Deposited Nickel Cobalt Oxides on the Oxygen Evolution Reaction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2405188. [PMID: 38958233 PMCID: PMC11348001 DOI: 10.1002/advs.202405188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/04/2024] [Indexed: 07/04/2024]
Abstract
Nickel cobalt oxides (NCOs) are promising, non-precious oxygen evolution reaction (OER) electrocatalysts. However, the stoichiometry-dependent electrochemical behavior makes it crucial to understand the structure-OER relationship. In this work, NCO thin film model systems are prepared using atomic layer deposition. In-depth film characterization shows the phase transition from Ni-rich rock-salt films to Co-rich spinel films. Electrochemical analysis in 1 m KOH reveals a synergistic effect between Co and Ni with optimal performance for the 30 at.% Co film after 500 CV cycles. Electrochemical activation correlates with film composition, specifically increasing activation is observed for more Ni-rich films as its bulk transitions to the active (oxy)hydroxide phase. In parallel to this transition, the electrochemical surface area (ECSA) increases up to a factor 8. Using an original approach, the changes in ECSA are decoupled from intrinsic OER activity, leading to the conclusion that 70 at.% Co spinel phase NCO films are intrinsically the most active. The studies point to a chemical composition dependent OER mechanism: Co-rich spinel films show instantly high activities, while the more sustainable Ni-rich rock-salt films require extended activation to increase the ECSA and OER performance. The results highlight the added value of working with model systems to disclose structure-performance mechanisms.
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Affiliation(s)
- Renée T. M. van Limpt
- Department of Applied Physics and Science EducationEindhoven University of TechnologyEindhoven5600 MBNetherlands
| | - Mengmeng Lao
- Dutch Institute for Fundamental Energy Research (DIFFER)Eindhoven5600 HHNetherlands
| | - Mihalis N. Tsampas
- Dutch Institute for Fundamental Energy Research (DIFFER)Eindhoven5600 HHNetherlands
| | - Mariadriana Creatore
- Department of Applied Physics and Science EducationEindhoven University of TechnologyEindhoven5600 MBNetherlands
- Eindhoven Institute for Renewable Energy Systems (EIRES)Eindhoven5600 MBNetherlands
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Su J, Wang P, Zhou W, Peydayesh M, Zhou J, Jin T, Donat F, Jin C, Xia L, Wang K, Ren F, Van der Meeren P, García de Arquer FP, Mezzenga R. Single-site iron-anchored amyloid hydrogels as catalytic platforms for alcohol detoxification. NATURE NANOTECHNOLOGY 2024; 19:1168-1177. [PMID: 38740933 PMCID: PMC11329373 DOI: 10.1038/s41565-024-01657-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 03/21/2024] [Indexed: 05/16/2024]
Abstract
Constructing effective antidotes to reduce global health impacts induced by alcohol prevalence is a challenging topic. Despite the positive effects observed with intravenous applications of natural enzyme complexes, their insufficient activities and complicated usage often result in the accumulation of toxic acetaldehyde, which raises important clinical concerns, highlighting the pressing need for stable oral strategies. Here we present an effective solution for alcohol detoxification by employing a biomimetic-nanozyme amyloid hydrogel as an orally administered catalytic platform. We exploit amyloid fibrils derived from β-lactoglobulin, a readily accessible milk protein that is rich in coordinable nitrogen atoms, as a nanocarrier to stabilize atomically dispersed iron (ferrous-dominated). By emulating the coordination structure of the horseradish peroxidase enzyme, the single-site iron nanozyme demonstrates the capability to selectively catalyse alcohol oxidation into acetic acid, as opposed to the more toxic acetaldehyde. Administering the gelatinous nanozyme to mice suffering from alcohol intoxication significantly reduced their blood-alcohol levels (decreased by 55.8% 300 min post-alcohol intake) without causing additional acetaldehyde build-up. Our hydrogel further demonstrates a protective effect on the liver, while simultaneously mitigating intestinal damage and dysbiosis associated with chronic alcohol consumption, introducing a promising strategy in effective alcohol detoxification.
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Affiliation(s)
- Jiaqi Su
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland.
- Particle and Interfacial Technology Group, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
| | - Pengjie Wang
- Department of Nutrition and Health, Beijing Higher Institution Engineering Research Center of Animal Products, China Agricultural University, Beijing, China
| | - Wei Zhou
- Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | - Mohammad Peydayesh
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Jiangtao Zhou
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Tonghui Jin
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Felix Donat
- Institute of Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Cuiyuan Jin
- Institute of Translational Medicine, Zhejiang Shuren University, Zhejiang, China
| | - Lu Xia
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Kaiwen Wang
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Fazheng Ren
- Department of Nutrition and Health, Beijing Higher Institution Engineering Research Center of Animal Products, China Agricultural University, Beijing, China
| | - Paul Van der Meeren
- Particle and Interfacial Technology Group, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - F Pelayo García de Arquer
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Raffaele Mezzenga
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland.
- Department of Materials, ETH Zurich, Zurich, Switzerland.
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5
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Zhang W, Li H, Ning X. Anodic Electrolysis Strategy Enabled Fe/FeCl 2 Electrode for Scalable Fe/FeCl 2-Graphite Molten Salt Battery. ACS APPLIED MATERIALS & INTERFACES 2024; 16:30545-30555. [PMID: 38828906 DOI: 10.1021/acsami.4c03592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
The Fe/FeCl2-Graphite molten salt battery is a promising technology for large-scale energy storage, offering a long lifespan, a low operating temperature (<200 °C), and cost efficiency. However, its practical applications are hindered by the lack of a scalable preparation approach and insufficient redox stability in the Fe/FeCl2 electrode. Our study introduces an electrochemical anodic electrolysis (EAE) strategy, employing the anodic process (Fe → Fe2+) in an Al|AlCl3/NaCl/LiCl|Fe electrolysis system for the Fe/Fe2+ negative electrode in the Fe/FeCl2-Graphite battery. The EAE strategy forms an oxidized film, preventing incipient dissolution in the electrolyte and addressing redox stability issues with FeCl2 as the active substance. The Fe/Fe2+ negative electrode prepared by the EAE strategy exhibits a stabilized capacity of 0.72 mAh/cm2 after 7000 cycles at 5 mA/cm2, with a lower polarization level (∼29 mV) compared to FeCl2 as the active component. The flexibility of the EAE strategy is validated in both galvanostatic and potentiostatic processes, with a discharge capacity of 14 mAh after 1000 cycles, a capacity retention rate of 85%, and a Coulombic efficiency of 98% in the potentiostatic anodic electrolysis Fe/Fe2+ electrode. The scalability and reliability of the EAE strategy are further demonstrated in capacity-expanded Fe/FeCl2-Graphite batteries, reaching a discharge capacity of 155.1 mAh after 1000 cycles at 130 mA, with a capacity retention rate of 94%. For the first time, we showcased an EAE approach capable of producing Fe/Fe2+ electrodes at a rate of about 68.6 m2 per day. Additionally, we successfully assembled an Fe/FeCl2-Graphite battery at about a 0.42 ampere-hour level, paving the way for the scalable application of Fe/FeCl2-Graphite batteries.
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Affiliation(s)
- Wenlong Zhang
- Center for Alloy Innovation and Design (CAID), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China
| | - Huanxin Li
- Department of Chemical Engineering, University College London, London WC1E 7JE, U.K
- Department of Chemistry, Physical & Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, U.K
| | - Xiaohui Ning
- Center for Alloy Innovation and Design (CAID), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China
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6
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Bui VKH, Nguyen XC, Truong HB, Hur J. Using CuMgFe layered double oxide to replace laccase as a catalyst for abiotic humification. CHEMOSPHERE 2024; 353:141647. [PMID: 38460843 DOI: 10.1016/j.chemosphere.2024.141647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 03/03/2024] [Accepted: 03/03/2024] [Indexed: 03/11/2024]
Abstract
Humification offers a promising avenue for sequestering dissolved organic carbon while facilitating environmental cleanup. In this study, CuMgFe layered double oxides (LDO) were applied as a catalyst to replace conventional enzymes, such as laccase, thereby enhancing the in vitro polyphenol-Maillard humification reaction. CuMgFe LDO was synthesized through calcination of CuMgFe layered double hydroxides (LDH) at 500 °C for 5 h. A suite of characterization methods confirmed the successful formation into mixed oxides (Cu2O, CuO, MgO, FeO, and Fe2O3) after thermal treatment. A rapid humification reaction was observed with CuMgFe LDO, occurring within a two-week span, likely due to a distinct synergy between copper and iron elements. Subsequent analyses identified that MgO in CuMgFe LDO also played a pivotal role in humification by stabilizing the pH of the reaction. In the absence of magnesium, LDO's humification activity was more pronounced in the early stages of the reaction, but it rapidly diminished as the reaction progressed. The efficiency of CuMgFe LDO was heightened at elevated temperatures (35 °C), while light conditions manifested a discernible effect, with a modest decrease in humification efficacy under indoor light exposure. CuMgFe LDO surpassed both laccase and MgFe LDH in performance, boasting a superior humification efficiency relative to its precursor, CuMgFe LDH. The catalysts' humification activity was modulated by their crystallinity and valence dynamics. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) results suggested that introducing the amino acid, glycine, expedited the CuMgFe LDO-fueled humification, enhancing the formation of C-N and C-C bonds in the resultant products. The humic-like substances derived from the catalyst-enhanced reaction displayed an elevated presence of aromatic configurations and a richer array of oxygen functional groups in comparison to a typical commercial humic material.
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Affiliation(s)
- Vu Khac Hoang Bui
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea
| | - Xuan Cuong Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; Faculty of Environmental Chemical Engineering, Duy Tan University, Da Nang, 550000, Viet Nam
| | - Hai Bang Truong
- Optical Materials Research Group, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Viet Nam
| | - Jin Hur
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea.
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Liu Y, Chu S, Xu Y, Chen X, Zhou H, Li J, Ren Y, Su X. Upcycling of Cr-Containing Sulfate Waste into Efficient FeCrO 3/Fe 2O 3 Catalysts for CO 2 Hydrogenation Reaction. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1598. [PMID: 38612111 PMCID: PMC11012381 DOI: 10.3390/ma17071598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 03/24/2024] [Accepted: 03/29/2024] [Indexed: 04/14/2024]
Abstract
Upcycling Cr-containing sulfate waste into catalysts for CO2 hydrogenation reaction benefits both pollution mitigation and economic sustainability. In this study, FeCrO3/Fe2O3 catalysts were successfully prepared by a simple hydrothermal method using Cr-containing sodium sulfate (Cr-SS) as a Cr source for efficient conversion and stable treatment of Cr. The removal rate of Cr in Cr-SS can reach 99.9% at the optimized hydrothermal conditions. When the synthesized catalysts were activated and used for the CO2 hydrogenation reaction, a 50% increase in CO2 conversion was achieved compared with the catalyst prepared by impregnation with a comparable amount of Cr. According to the extraction and risk assessment code (RAC) of the Reference Office of the European Community Bureau (BCR), the synthesized FeCrO3/Fe2O3 is risk-free. This work not only realizes the detoxification of the Cr-SS but transfers Cr into stable FeCrO3 for application in a catalytic field, which provides a strategy for the harmless disposal and resource utilization of Cr-containing hazardous waste.
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Affiliation(s)
- Yongqi Liu
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Shasha Chu
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yuebing Xu
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Xinyu Chen
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Hao Zhou
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Jinlin Li
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yanjie Ren
- Xinjiang Qinghua Energy Group Co., Ltd., Yining County 835100, China
| | - Xintai Su
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
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8
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Li X, Chen J, Wu B, Gao Z, He B. Immobilization and Characterization of a Processive Endoglucanase EG5C-1 from Bacillus subtilis on Melamine-Glutaraldehyde Dendrimer-Functionalized Magnetic Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:340. [PMID: 38392713 PMCID: PMC10891739 DOI: 10.3390/nano14040340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/02/2024] [Accepted: 02/05/2024] [Indexed: 02/24/2024]
Abstract
Exploring an appropriate immobilization approach to enhance catalytic activity and reusability of cellulase is of great importance to reduce the price of enzymes and promote the industrialization of cellulose-derived biochemicals. In this study, Fe3O4 magnetic nanoparticles (MNPs) were functionalized with meso-2,3-dimercaptosuccinic acid to introduce carboxyl groups on the surface (DMNPs). Then, melamine-glutaraldehyde dendrimer-like polymers were grafted on DMNPs to increase protein binding sites for the immobilization of processive endoglucanase EG5C-1. Moreover, this dendrimer-like structure was beneficial to protect the conformation of EG5C-1 and facilitate the interaction between substrate and active center. The loading capacity of the functionalized copolymers (MG-DMNPs) for EG5C-1 was about 195 mg/g, where more than 90% of the activity was recovered. Immobilized EG5C-1 exhibited improved thermal stability and increased tolerability over a broad pH range compared with the free one. Additionally, MG-DMNP/EG5C-1 biocomposite maintained approximately 80% of its initial hydrolysis productivity after five cycles of usage using filter paper as the substrate. Our results provided a promising approach for the functionalization of MNPs, enabling the immobilization of cellulases with a high loading capacity and excellent activity recovery.
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Affiliation(s)
- Xiaozhou Li
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, China; (X.L.); (J.C.); (B.W.)
| | - Jie Chen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, China; (X.L.); (J.C.); (B.W.)
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, China; (X.L.); (J.C.); (B.W.)
| | - Zhen Gao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, China; (X.L.); (J.C.); (B.W.)
| | - Bingfang He
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211800, China;
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9
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Susanna James M, Garg A. Performance of electro-Fenton process for the treatment of synthetic sulphidic spent caustic waste stream generated from petroleum refineries. CHEMOSPHERE 2024; 346:140572. [PMID: 38303390 DOI: 10.1016/j.chemosphere.2023.140572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/30/2023] [Accepted: 10/26/2023] [Indexed: 02/03/2024]
Abstract
Sulphidic spent caustic (SSC) is an alkaline waste stream which is generated during caustic scrubbing of liquefied petroleum gas and ethylene products. Due to presence of high concentrations of sulphides and phenols, the waste stream requires proper treatment before mixing with the low strength wastewater streams produced from other refinery operations. Electrochemical process is an emerging treatment method that can work efficiently at ambient conditions. The present study reports performance of electro-Fenton (EF) process for the treatment of synthetic SSC wastewater (sulphides = 10 g L-1, phenol = 2 g L-1 and pH = 12.9). The EF runs were carried out for 2 h duration in a reactor equipped with iron electrodes. The effects of H2O2 dose (0.26-1.3 M), current density (1-20 mA cm-2), pH (4.5-12.9) and stirring speed (100-1000 rpm) were investigated on removal of pollutants. The H2O2 was rapidly consumed in initial 30 min during which the significant fraction of the pollutants was degraded or removed. The optimum conditions for EF process were found to be as follows: pH = 4.5, H2O2 dose = 1.05 M, current density = 5 mA cm-2 and stirring speed = 500 rpm. At these conditions, the maximum sulphide and phenol removals from the wastewater were 98% and 91%, respectively. The results will be helpful to the wastewater treatment plant operators worldwide dealing with high concentrations of such pollutants.
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Affiliation(s)
- Merin Susanna James
- Environmental Science and Engineering Department, Indian Institute of Technology (IIT) Bombay, Mumbai, Maharashtra, 400076, India.
| | - Anurag Garg
- Environmental Science and Engineering Department, Indian Institute of Technology (IIT) Bombay, Mumbai, Maharashtra, 400076, India.
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10
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Wang Y, Wang J, Jiao Y, Chen K, Chen T, Wu X, Jiang X, Bu W, Liu C, Qu X. Redox-active polyphenol nanoparticles deprive endogenous glutathione of electrons for ROS generation and tumor chemodynamic therapy. Acta Biomater 2023; 172:423-440. [PMID: 37778486 DOI: 10.1016/j.actbio.2023.09.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 09/13/2023] [Accepted: 09/25/2023] [Indexed: 10/03/2023]
Abstract
Chemodynamic therapy (CDT) based on generating reactive oxygen species (ROS) is promising for cancer treatment. However, the intrinsic H2O2 is deficient for CDT, and glutathione (GSH) eliminates ROS to protect tumor cells from ROS cytotoxicity. Herein, we propose a strategy to switch the electron flow direction of GSH for O2 reduction and ROS generation rather than ROS clearance by using P(DA-Fc) nanoparticles, which are polymerized from ferrocenecarboxylic acid (Fc) coupled dopamine. P(DA-Fc) NPs with phenol-quinone conversion ability mimic NOX enzyme to deprive electrons from GSH to reduce O2 for H2O2 generation; the following •OH release can be triggered by Fc. Semiquinone radicals in P(DA-Fc) are significantly enhanced after GSH treatment, further demonstrated with strong single-electron reduction ability by calculation. In vitro and in vivo experiments indicate that P(DA-Fc) can consume intrinsic GSH to produce endogenous ROS; ROS generation strongly depends on GSH/pH level and eventually causes tumor cell death. Our work makes the first attempt to reverse the function of GSH from ROS scavenger to ROS producer, explores new roles of PDA-based nanomaterials in CDT beyond photothermal reagents and drug carriers, and provides a new strategy to improve the efficiency of CDT. STATEMENT OF SIGNIFICANCE: P(DA-Fc) nanoparticles performing tumor microenvironment response capacity and tumor reductive power utilize ability were fabricated for CDT tumor suppression. After endocytosis by tumor cells, P(DA-Fc) deprived GSH of electrons for H2O2 and •OH release, mimicking the intrinsic ROS production conducted by NADPH, further inducing tumor cell necrosis and apoptosis. Our work makes the first attempt to reverse the function of GSH from ROS scavenger to producer, explores new functions of PDA-based nanomaterials in CDT beyond photothermal reagents and drug carriers, and provides a new strategy to improve CDT efficiency.
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Affiliation(s)
- Yifei Wang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, PR China
| | - Jia Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China
| | - Yunke Jiao
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, PR China
| | - Kangli Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, PR China
| | - Tianhao Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, PR China
| | - Xinping Wu
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China.
| | - Xingwu Jiang
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, PR China.
| | - Wenbo Bu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, PR China
| | - Changsheng Liu
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, PR China
| | - Xue Qu
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, PR China; Wenzhou Institute of Shanghai University, Wenzhou 325000, PR China; Shanghai Frontier Science Center of Optogenetic Techniques for Cell Metabolism, Shanghai 200237, PR China.
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11
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Guo Z, Wang M, Qiao L, Wang J, He Z. Photothermal, Magnetic, and Superhydrophobic PU Sponge Decorated with a Fe 3O 4/MXene/Lignin Composite for Efficient Oil/Water Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16935-16953. [PMID: 37969089 DOI: 10.1021/acs.langmuir.3c02810] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Frequent oil spills and the discharge of industrial oily wastewaters have become a serious threat to the environment, ecosystem, and human beings. Herein, a photothermal, magnetic, and superhydrophobic PU sponge decorated with a Fe3O4/MXene/lignin composite (labeled as S-Fe3O4/MXene/lignin@PU sponge) has been designed and prepared. The obtained superhydrophobic/superoleophilic PU sponge possesses excellent chemical stability, thermal stability, and mechanical durability in terms of being immersed in corrosive solutions and organic solvents and boiling water and being abrased by sandpapers, respectively. The oil adsorption capacities of the S-Fe3O4/MXene/lignin@PU sponge for various organic liquids range from 29.1 to 70.3 g/g, and the oil adsorption capacity for CCl4 can remain 69.6 g/g even after 15 cyclic adsorption tests. The separation efficiencies of the S-Fe3O4/MXene/lignin@PU sponge for n-hexane and CCl4 are higher than 98% in different environments (i.e., water, hot water, 1 mol/L NaOH, 1 mol/L NaCl, and 1 mol/L HCl). More importantly, the introduction of three light absorbers (i.e., Fe3O4, MXene, and lignin) into the S-Fe3O4/MXene/lignin@PU sponge shows a synergistic effect in the photothermal heat conversion performance, and the maximum surface temperature reaches 64.4 °C under sunlight irradiation (1.0 kW/m2). The separation flux of the S-Fe3O4/MXene/lignin@PU sponge for viscous LT147 vacuum pump oil reaches 35,469 L m-2 h-1 under sunlight irradiation, showing an increase of 27.3% compared to that of oil adsorption processes without the photothermal effect. Thus, the rational design of superhydrophobic sponges by introducing proper photothermal heat absorbers provides new insights into facile and cost-effective preparation of sponges for efficient oil/water separation.
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Affiliation(s)
- Zhibiao Guo
- Anti-Icing Materials (AIM) Laboratory, Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Mingkun Wang
- Anti-Icing Materials (AIM) Laboratory, Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Lei Qiao
- Anti-Icing Materials (AIM) Laboratory, Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Jianxiang Wang
- Anti-Icing Materials (AIM) Laboratory, Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Zhiwei He
- Anti-Icing Materials (AIM) Laboratory, Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
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12
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Repa GM, Fredin LA. Lessons Learned from Catalysis to Qubits: General Strategies to Build Accessible and Accurate First-Principles Models of Point Defects. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:21930-21939. [PMID: 38024198 PMCID: PMC10658620 DOI: 10.1021/acs.jpcc.3c06267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023]
Abstract
Defects and dopants play critical roles in defining the properties of a material. Achieving a mechanistic understanding of how such properties arise is challenging with current experimental methods, and computational approaches suffer from significant modeling limitations that frequently require a posteriori fitting. Consequently, the pace of dopant discovery as a means of tuning material properties for a particular application has been slow. However, recent advances in computation have enabled researchers to move away from semiempirical schemes to reposition density functional theory as a predictive tool and improve the accessibility of highly accurate first-principles methods to all researchers. This Perspective discusses some of these recent achievements that provide more accurate first-principles geometric, thermodynamic, optical, and electronic properties simultaneously. Advancements related to supercells, basis sets, functionals, and optimization protocols, as well as suggestions for evaluating the quality of a computational model through comparison to experimental data, are discussed. Moreover, recent computational results in the fields of energy materials, heterogeneous catalysis, and quantum informatics are reviewed along with an evaluation of current frontiers and opportunities in the field of computational materials chemistry.
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Affiliation(s)
- Gil M. Repa
- Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Lisa A. Fredin
- Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
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13
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Wu M, Yang ZH, Jiang TB, Zhang WW, Wang ZW, Hou QX. Enhancing sludge methanogenesis with changed micro-environment of anaerobic microorganisms by Fenton iron mud. CHEMOSPHERE 2023; 341:139884. [PMID: 37648172 DOI: 10.1016/j.chemosphere.2023.139884] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 06/14/2023] [Accepted: 08/17/2023] [Indexed: 09/01/2023]
Abstract
Conductive materials have been demonstrated to enhance sludge methanogenesis, but few researches have concentrated on the interaction among conductive materials, microorganisms and their immediate living environment. In this study, Fenton iron mud with a high abundance of Fe(III) was recycled and applied in anaerobic reactors to promote anaerobic digestion (AD) process. The results show that the primary content of extracellular polymeric substances (EPS) such as polysaccharides and proteins increased significantly, possibly promoting microbial aggregation. Furthermore, with the increment of redox mediators including humic substances in EPS and Fe(III) introduced by Fenton iron mud, the direct interspecies electron transfer (DIET) between methanogens and interacting bacteria could be accelerated, which enhanced the rate of methanogenesis in anaerobic digestion (35.21 ± 4.53% increase compared to the control). The further analysis of the anaerobic microbial community confirmed the fact that Fenton iron mud enriched functional microorganisms, such as the abundance of CO2-reducing (e.g. Chloroflexi) and Fe(III)-reducing bacteria (e.g., Tepidimicrobium), thereby expediting the electron transfer reaction in the AD process via microbial DIET and dissimilatory iron reduction (DIR). This work will make it possible for using the recycled hazardous material - Fenton iron mud to improve the performance of anaerobic granular sludge during methanogenesis.
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Affiliation(s)
- Ming Wu
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Zhen-Hu Yang
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Tong-Bao Jiang
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Wen-Wen Zhang
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Zhi-Wei Wang
- College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Qing-Xi Hou
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin, 300457, China.
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14
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Kadam SA, Sandoval S, Bastl Z, Simkovičová K, Kvítek L, Jašík J, Olszówka JE, Valtera S, Vaidulych M, Morávková J, Sazama P, Kubička D, Travert A, van Bokhoven JA, Fortunelli A, Kleibert A, Kalbáč M, Vajda Š. Cyclohexane Oxidative Dehydrogenation on Graphene-Oxide-Supported Cobalt Ferrite Nanohybrids: Effect of Dynamic Nature of Active Sites on Reaction Selectivity. ACS Catal 2023; 13:13484-13505. [PMID: 37881789 PMCID: PMC10594591 DOI: 10.1021/acscatal.3c02592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/25/2023] [Indexed: 10/27/2023]
Abstract
In this work, we investigated cyclohexane oxidative dehydrogenation (ODH) catalyzed by cobalt ferrite nanoparticles supported on reduced graphene oxide (RGO). We aim to identify the active sites that are specifically responsible for full and partial dehydrogenation using advanced spectroscopic techniques such as X-ray photoelectron emission microscopy (XPEEM) and X-ray photoelectron spectroscopy (XPS) along with kinetic analysis. Spectroscopically, we propose that Fe3+/Td sites could exclusively produce benzene through full cyclohexane dehydrogenation, while kinetic analysis shows that oxygen-derived species (O*) are responsible for partial dehydrogenation to form cyclohexene in a single catalytic sojourn. We unravel the dynamic cooperativity between octahedral and tetrahedral sites and the unique role of the support in masking undesired active (Fe3+/Td) sites. This phenomenon was strategically used to control the abundance of these species on the catalyst surface by varying the particle size and the wt % content of the nanoparticles on the RGO support in order to control the reaction selectivity without compromising reaction rates which are otherwise extremely challenging due to the much favorable thermodynamics for complete dehydrogenation and complete combustion under oxidative conditions.
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Affiliation(s)
- Shashikant A. Kadam
- Department
of Nanocatalysis, J. Heyrovsky Institute
of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - Stefania Sandoval
- Department
of Low Dimensional Systems, J. Heyrovsky
Institute of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - Zdeněk Bastl
- Department
of Low Dimensional Systems, J. Heyrovsky
Institute of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - Karolína Simkovičová
- Department
of Nanocatalysis, J. Heyrovsky Institute
of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
- Department
of Physical Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 12, 77900 Olomouc, Czech Republic
| | - Libor Kvítek
- Department
of Physical Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 12, 77900 Olomouc, Czech Republic
| | - Juraj Jašík
- Department
of Nanocatalysis, J. Heyrovsky Institute
of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - Joanna Elżbieta Olszówka
- Department
of Nanocatalysis, J. Heyrovsky Institute
of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - Stanislav Valtera
- Department
of Nanocatalysis, J. Heyrovsky Institute
of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
- Department
of Mathematics, Informatics and Cybernetics, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Mykhailo Vaidulych
- Department
of Nanocatalysis, J. Heyrovsky Institute
of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - Jaroslava Morávková
- Department
of Structure and Dynamics in Catalysis, J. Heyrovsky Institute of Physical Chemistry of the Czech Academy
of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - Petr Sazama
- Department
of Structure and Dynamics in Catalysis, J. Heyrovsky Institute of Physical Chemistry of the Czech Academy
of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - David Kubička
- Department
of Petroleum Technology and Alternative Fuels, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech
Republic
| | - Arnaud Travert
- Normandie
Univ., ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 14000 Caen, France
| | | | | | - Armin Kleibert
- Swiss
Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Martin Kalbáč
- Department
of Low Dimensional Systems, J. Heyrovsky
Institute of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
| | - Štefan Vajda
- Department
of Nanocatalysis, J. Heyrovsky Institute
of Physical Chemistry of the Czech Academy of Sciences v.v.i, Dolejškova 3, 18223 Prague, Czech Republic
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15
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Cai Z, Zhang F, Cao X, Huang Y, Wang D, Zhang L, Huang K. The Effect of Mn, Al Doping on the CO 2 Hydrogenation Performance of CaCO 3 -Supported Fe-Based Catalysts. Chempluschem 2023; 88:e202300286. [PMID: 37551722 DOI: 10.1002/cplu.202300286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/23/2023] [Accepted: 08/07/2023] [Indexed: 08/09/2023]
Abstract
With increasingly serious environmental problems caused by the greenhouse effect, it has also become essential to reduce the concentration of CO2 in the atmosphere. In this paper, CaCO3 -supported Fe-based catalysts doped with Mn, Al, and K are prepared by a straightforward method and used for CO2 hydrogenation. The fresh and spent catalysts were characterized by SEM-EDS, BET, TG, CO2 -TPD, XRD, and XPS. The experimental results show that the highest CO2 conversion rate of Fe10Mn2Al10Ca is 35.99 %, the maximum FTY value is 293.98 μmolCO2 ⋅ g Fe - 1 ${{\rm{g}}_{{\rm{Fe}}}^{ - 1} }$ ⋅ s-1 , the maximum O/P value is 6.61, and the lowest CO selectivity is 32.21 %. At the same time, according to the characterization results, the doping of Mn and Al increased the Fe3 O4 /FeCx ratio. As the Fe3 O4 /FeCx ratio increases, the proportion of short-chain hydrocarbons (CH4 , C2-4 ) in the products increases, and the proportion of long-chain hydrocarbons (C5+ ) decrease. Therefore, the co-doping of Mn and Al promotes the conversion of CO and reduces its selectivity, and promotes the formation of light olefins. Finally, it is hoped that this study can provide a reference for further research on CaCO3 -supported Fe catalysts.
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Affiliation(s)
- Zhenyu Cai
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Fenglei Zhang
- Intelligent Transportation System Research Center, Southeast University, Nanjing, 211189, P. R. China
| | - Xinjie Cao
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Yifei Huang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Danlei Wang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Lei Zhang
- Intelligent Transportation System Research Center, Southeast University, Nanjing, 211189, P. R. China
| | - Kai Huang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China
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16
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Kaiser S, Plansky J, Krinninger M, Shavorskiy A, Zhu S, Heiz U, Esch F, Lechner BAJ. Does Cluster Encapsulation Inhibit Sintering? Stabilization of Size-Selected Pt Clusters on Fe 3O 4(001) by SMSI. ACS Catal 2023; 13:6203-6213. [PMID: 37180966 PMCID: PMC10167661 DOI: 10.1021/acscatal.3c00448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/08/2023] [Indexed: 05/16/2023]
Abstract
The metastability of supported metal nanoparticles limits their application in heterogeneous catalysis at elevated temperatures due to their tendency to sinter. One strategy to overcome these thermodynamic limits on reducible oxide supports is encapsulation via strong metal-support interaction (SMSI). While annealing-induced encapsulation is a well-explored phenomenon for extended nanoparticles, it is as yet unknown whether the same mechanisms hold for subnanometer clusters, where concomitant sintering and alloying might play a significant role. In this article, we explore the encapsulation and stability of size-selected Pt5, Pt10, and Pt19 clusters deposited on Fe3O4(001). In a multimodal approach using temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), and scanning tunneling microscopy (STM), we demonstrate that SMSI indeed leads to the formation of a defective, FeO-like conglomerate encapsulating the clusters. By stepwise annealing up to 1023 K, we observe the succession of encapsulation, cluster coalescence, and Ostwald ripening, resulting in square-shaped crystalline Pt particles, independent of the initial cluster size. The respective sintering onset temperatures scale with the cluster footprint and thus size. Remarkably, while small encapsulated clusters can still diffuse as a whole, atom detachment and thus Ostwald ripening are successfully suppressed up to 823 K, i.e., 200 K above the Hüttig temperature that indicates the thermodynamic stability limit.
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Affiliation(s)
- Sebastian Kaiser
- Chair
of Physical Chemistry and Catalysis Research Center, Department of
Chemistry, School of Natural Sciences, Technical
University of Munich, 85748 Garching, Germany
| | - Johanna Plansky
- Functional
Nanomaterials Group and Catalysis Research Center, Department of Chemistry,
School of Natural Sciences, Technical University
of Munich, 85748 Garching, Germany
| | - Matthias Krinninger
- Functional
Nanomaterials Group and Catalysis Research Center, Department of Chemistry,
School of Natural Sciences, Technical University
of Munich, 85748 Garching, Germany
| | | | - Suyun Zhu
- MAX
IV Laboratory, Lund University, Lund 221 00, Sweden
| | - Ueli Heiz
- Chair
of Physical Chemistry and Catalysis Research Center, Department of
Chemistry, School of Natural Sciences, Technical
University of Munich, 85748 Garching, Germany
| | - Friedrich Esch
- Chair
of Physical Chemistry and Catalysis Research Center, Department of
Chemistry, School of Natural Sciences, Technical
University of Munich, 85748 Garching, Germany
| | - Barbara A. J. Lechner
- Functional
Nanomaterials Group and Catalysis Research Center, Department of Chemistry,
School of Natural Sciences, Technical University
of Munich, 85748 Garching, Germany
- Institute
for Advanced Study, Technical University
of Munich, Lichtenbergstraße
2a, 85748 Garching, Germany
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17
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Perco D, Loi F, Bignardi L, Sbuelz L, Lacovig P, Tosi E, Lizzit S, Kartouzian A, Heiz U, Baraldi A. The highest oxidation state observed in graphene-supported sub-nanometer iron oxide clusters. Commun Chem 2023; 6:61. [PMID: 37012362 PMCID: PMC10070315 DOI: 10.1038/s42004-023-00865-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 03/24/2023] [Indexed: 04/05/2023] Open
Abstract
Size-selected iron oxide nanoclusters are outstanding candidates for technological-oriented applications due to their high efficiency-to-cost ratio. However, despite many theoretical studies, experimental works on their oxidation mechanism are still limited to gas-phase clusters. Herein we investigate the oxidation of graphene-supported size-selected Fen clusters by means of high-resolution X-ray Photoelectron Spectroscopy. We show a dependency of the core electron Fe 2p3/2 binding energy of metallic and oxidized clusters on the cluster size. Binding energies are also linked to chemical reactivity through the asymmetry parameter which is related to electron density of states at the Fermi energy. Upon oxidation, iron atoms in clusters reach the oxidation state Fe(II) and the absence of other oxidation states indicates a Fe-to-O ratio close to 1:1, in agreement with previous theoretical calculations and gas-phase experiments. Such knowledge can provide a basis for a better understanding of the behavior of iron oxide nanoclusters as supported catalysts.
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Affiliation(s)
- Deborah Perco
- Department of Physics, University of Trieste, Via Valerio 2, 34127, Trieste, Italy
| | - Federico Loi
- Department of Physics, University of Trieste, Via Valerio 2, 34127, Trieste, Italy
| | - Luca Bignardi
- Department of Physics, University of Trieste, Via Valerio 2, 34127, Trieste, Italy
| | - Luca Sbuelz
- Department of Physics, University of Trieste, Via Valerio 2, 34127, Trieste, Italy
| | - Paolo Lacovig
- Elettra - Sincrotrone Trieste, AREA Science Park, 34149, Trieste, Italy
| | - Ezequiel Tosi
- Elettra - Sincrotrone Trieste, AREA Science Park, 34149, Trieste, Italy
| | - Silvano Lizzit
- Elettra - Sincrotrone Trieste, AREA Science Park, 34149, Trieste, Italy
| | - Aras Kartouzian
- Department of Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching, Germany
| | - Ueli Heiz
- Department of Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching, Germany
| | - Alessandro Baraldi
- Department of Physics, University of Trieste, Via Valerio 2, 34127, Trieste, Italy.
- Elettra - Sincrotrone Trieste, AREA Science Park, 34149, Trieste, Italy.
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18
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Duan J, Zhou Y, Ren Y, Liu F, Deng P, Yang M, Ge H, Gao J, Yang J, Qin Y. Effect of Electronic Structure over Late Transition-Metal M 1–N 4 Single-Atom Sites on Hydroxyl Radical-Induced Oxidations. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- Jianglin Duan
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China
| | - Yanan Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Yujing Ren
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China
| | - Fenli Liu
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China
| | - Pengcheng Deng
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China
| | - Man Yang
- School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China
| | - Huibin Ge
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China
| | - Jie Gao
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Yong Qin
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
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19
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Lahiri N, Song D, Zhang X, Huang X, Stoerzinger KA, Carvalho OQ, Adiga PP, Blum M, Rosso KM. Interplay between Facets and Defects during the Dissociative and Molecular Adsorption of Water on Metal Oxide Surfaces. J Am Chem Soc 2023; 145:2930-2940. [PMID: 36696237 DOI: 10.1021/jacs.2c11291] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Surface terminations and defects play a central role in determining how water interacts with metal oxides, thereby setting important properties of the interface that govern reactivity such as the type and distribution of hydroxyl groups. However, the interconnections between facets and defects remain poorly understood. This limits the usefulness of conventional notions such as that hydroxylation is controlled by metal cation exposure at the surface. Here, using hematite (α-Fe2O3) as a model system, we show how oxygen vacancies overwhelm surface cation-dependent hydroxylation behavior. Synchrotron-based ambient-pressure X-ray photoelectron spectroscopy was used to monitor the adsorption of molecular water and its dissociation to form hydroxyl groups in situ on (001), (012), or (104) facet-engineered hematite nanoparticles. Supported by density functional theory calculations of the respective surface energies and oxygen vacancy formation energies, the findings show how oxygen vacancies are more prone to form on higher energy facets and induce surface hydroxylation at extremely low relative humidity values of 5 × 10-5%. When these vacancies are eliminated, the extent of surface hydroxylation across the facets is as expected from the areal density of exposed iron cations at the surface. These findings help answer fundamental questions about the nature of reducible metal oxide-water interfaces in natural and technological settings and lay the groundwork for rational design of improved oxide-based catalysts.
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Affiliation(s)
- Nabajit Lahiri
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington99352, United States
| | - Duo Song
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington99352, United States
| | - Xin Zhang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington99352, United States
| | - Xiaopeng Huang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington99352, United States
| | - Kelsey A Stoerzinger
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington99352, United States.,Department of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon97331, United States
| | - O Quinn Carvalho
- Department of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon97331, United States
| | - Prajwal P Adiga
- Department of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon97331, United States
| | - Monika Blum
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Kevin M Rosso
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington99352, United States
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20
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Jiao C, Cai T, Chen H, Ruan X, Wang Y, Gong P, Li H, Atkin R, Yang F, Zhao H, Nishimura K, Jiang N, Yu J. A mucus-inspired solvent-free carbon dot-based nanofluid triggers significant tribological synergy for sulfonated h-BN reinforced epoxy composites. NANOSCALE ADVANCES 2023; 5:711-724. [PMID: 36756511 PMCID: PMC9890617 DOI: 10.1039/d2na00689h] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/08/2022] [Indexed: 06/18/2023]
Abstract
Nano-filler reinforced polymer-based composites have attracted extensive attention in tribology; however, to date, it is still challenging to construct a favorable lubricating system with excellent compatibility, lubricity and durability using nano-filler reinforced polymer-based composites. Herein, sulfonated boron nitride nano-sheets (h-BN@PSDA) are prepared and used as nano-fillers for epoxy resins (EPs), to improve friction and wear along with thermal conductivity. Furthermore, inspired by the lubricating principle and structure of snail mucus, a solvent-free carbon dot-based nanofluid (F-CDs) is fabricated and used for the first time as the lubricant for h-BN@PSDA/EPs. Both poly (4-styrene sulfonate) and polyether amine grafted on the surface of F-CDs contribute to branched structures and multiple interfacial absorption effects. Extraordinarily low friction and wear are detected after long-term sliding. The average coefficient of friction and wear rate of h-BN@PSDA/EPs composites are reduced by 95.25% and 99.42% respectively, in the presence of the F-CD nanofluid, compared to that of EPs. Besides, the added h-BN nano-sheets increase the thermal conductivity (TC) of EPs from 0.178 to 0.194 W (m-1 K-1). The distinguished lubrication performances are likely due to the formation of a hybrid nanostructure of 0D F-CDs and 2D h-BN@PSDA together with the "rolling-sliding" and "self-mending" effects of added F-CDs.
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Affiliation(s)
- Chengcheng Jiao
- School of Materials Science and Engineering, Shenyang University of Chemical Technology Shenyang 110142 China
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
| | - Tao Cai
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
| | - Huanyi Chen
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
| | - Xinxin Ruan
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
| | - Yandong Wang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
| | - Ping Gong
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
| | - Hua Li
- School of Molecular Sciences, University of Western Australia Perth Western Australia Australia
| | - Rob Atkin
- School of Molecular Sciences, University of Western Australia Perth Western Australia Australia
| | - Feng Yang
- School of Materials Science and Engineering, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Haichao Zhao
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
| | - Kazuhito Nishimura
- Advanced Nano-Processing Engineering Lab, Mechanical Engineering, Kogakuin University Tokyo 192-0015 Japan
| | - Nan Jiang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
| | - Jinhong Yu
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
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Wang B, Wang X, Liu Y, Zhang Q, Yang G, Zhang D, Guo H. Phytic acid-Fe chelate cold-pressed self-forming high-strength polyurethane/marigold straw composite with flame retardance and smoke suppression. Polym Degrad Stab 2023. [DOI: 10.1016/j.polymdegradstab.2023.110269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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22
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Bagus PS, Nelin CJ, Brundle CR, Crist BV, Ilton ES, Lahiri N, Rosso KM. Main and Satellite Features in the Ni 2p XPS of NiO. Inorg Chem 2022; 61:18077-18094. [DOI: 10.1021/acs.inorgchem.2c02549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Paul S. Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, United States
| | | | | | | | - Eugene S. Ilton
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Nabajit Lahiri
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kevin M. Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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23
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Preparation and properties of hemoglobin (Hb)-imprinted poly (ionic liquid)s via seATRP in only 5 μL Volumes. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03237-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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24
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Christoph JM, Minesinger GM, Bu C, Dukes CA, Elkins‐Tanton LT. Space Weathering Effects in Troilite by Simulated Solar-Wind Hydrogen and Helium Ion Irradiation. JOURNAL OF GEOPHYSICAL RESEARCH. PLANETS 2022; 127:e2021JE006916. [PMID: 35865507 PMCID: PMC9287097 DOI: 10.1029/2021je006916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 01/07/2022] [Accepted: 01/10/2022] [Indexed: 06/15/2023]
Abstract
Space weathering is a key process in the interpretation of airless planetary surfaces. As we engage new missions to planetary objects with potentially novel surfaces such as 16 Psyche, there is renewed interest in expanding our knowledge of space weathering effects to a wider variety of analog materials, including the physical/chemical effects of solar-wind ions on planetary regoliths. We have experimentally simulated the effects of solar ions on two polished thick sections of meteoritic troilite (FeS) via irradiation with 1 keV hydrogen (H+) and 4 keV helium (He+), to investigate effects resulting from different ion species. We detected depletion of sulfur over the course of each irradiation using in situ X-ray photoelectron spectroscopy. Sulfur depletion rates were surprisingly similar for H+ and He+, interpreted as a function of subsurface ion-activated diffusion. By comparing XPS-derived elemental abundances with SDTrimSP computer simulations, we further quantified sulfur diffusion, sputtering yield, and altered-layer composition with respect to incident-ion fluence, and accounted for the influence of surface oxidation due to atmospheric sample storage. Using scanning electron microscopy, we detected an increase in nanoscale surface roughness resulting from the irradiation, which we quantified using atomic force microscopy. Based on these results, we estimate that an exposure time of order 103 Earth-years is required for troilite on Psyche to reach equilibrium sulfur depletion within the first atomic layer.
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Affiliation(s)
- J. M. Christoph
- School of Earth and Space ExplorationArizona State UniversityTempeAZUSA
| | - G. M. Minesinger
- Laboratory of Astrophysics and Surface PhysicsUniversity of VirginiaCharlottesvilleVAUSA
| | - C. Bu
- Laboratory of Astrophysics and Surface PhysicsUniversity of VirginiaCharlottesvilleVAUSA
- Columbia Astrophysics LaboratoryColumbia UniversityNew YorkNYUSA
| | - C. A. Dukes
- Laboratory of Astrophysics and Surface PhysicsUniversity of VirginiaCharlottesvilleVAUSA
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Bagus PS, Nelin CJ, Brundle CR, Crist BV, Lahiri N, Rosso KM. Origin of the complex main and satellite features in Fe 2p XPS of Fe 2O 3. Phys Chem Chem Phys 2022; 24:4562-4575. [PMID: 35129561 DOI: 10.1039/d1cp04886d] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although the origin and assignment of the complex XPS features of the cations in ionic compounds has been the subject of extensive theoretical work, agreement with experimental observations remains insufficient for unambiguous interpretation. This paper presents a rigorous ab initio treatment of the main and satellite features in the Fe 2p XPS of Fe2O3. This has been possible using a unique methodology for the selection of orbitals that are used to form the ionic wavefunctions. This orbital selection makes it possible to treat both the angular momentum coupling of the open shell core and valence electrons as well the shake excitations from the closed shell orbitals associated with the O ligands into the valence open shell orbitals associated with the Fe 3d shell. This allows the character of the ionic states in terms of the occupations of the open shell core and valence orbitals and of the contributions of 2p1/2 and 2p3/2 ionization to the XPS intensities to be determined. Our analysis gives strong evidence that many body effects are essential for a correct description of the ionic states and, in general the states cannot be described by a single configuration over the open shell orbitals. An important consequence is that the Fe 2p XPS intensity in most of the features arises from small contributions from the ionization to many, tens to hundreds, of often unresolved ionic states. While the usual understanding of the lower binding energy main and satellite features as being dominantly from 2p3/2 ionization is confirmed, this is not the case for the higher binding energy features where 2p1/2 and 2p3/2 ionization and shake excitations in the valence space mix strongly. Furthermore, we have been able to show that a very large fraction, 88%, of the total Fe 2p XPS intensity is contained in a relatively small binding energy range of ∼35 eV. This is relevant if one wants to extract the stoichiometry of Fe2O3 from Fe 2p/O 1s intensity ratios. Similar considerations about the importance of many-body effects are likely to be relevant for other ionic compounds as well.
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Affiliation(s)
- Paul S Bagus
- Department of Chemistry, University of North Texas, Denton, TX 76203-5017, USA.
| | | | - C R Brundle
- C. R. Brundle and Associates, Soquel, CA 95073, USA
| | | | - N Lahiri
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Kevin M Rosso
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
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Kahk JM, Lischner J. Predicting Core Electron Binding Energies in Elements of the First Transition Series Using the Δ-Self-Consistent-Field Method. Faraday Discuss 2022; 236:364-373. [DOI: 10.1039/d1fd00103e] [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
The Δ-Self-Consistent-Field (ΔSCF) method has been established as an accurate and computationally efficient approach for calculating absolute core electron binding energies for light elements up to chlorine, but relatively little...
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27
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Zhang X, Deng J, Huangfu M, Wang Y, Wu B, Li S, Pang Z, Mei H. Novel insights into the influence of ferric ion as a surface modifier to enhance the floatability of specularite. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117141] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Kishor G, Bhowmik RN, Sinha AK. Structural phase stabilization via Ba site doping with bivalent Sr, Ca and Zn ions and Fe site doping with trivalent Cr and Ga ions in the BaFe 12O 19 hexaferrite and its magnetic modification. CrystEngComm 2022. [DOI: 10.1039/d2ce00583b] [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
Lattice structure, chemical state and magnetic properties in metal doped barium hexaferrite.
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Affiliation(s)
- Gara Kishor
- Department of Physics, School of Physical, Chemical and Applied Sciences, Pondicherry University, R. V Nagar, Kalapet-605014, Puducherry, India
| | - R. N. Bhowmik
- Department of Physics, School of Physical, Chemical and Applied Sciences, Pondicherry University, R. V Nagar, Kalapet-605014, Puducherry, India
| | - A. K. Sinha
- Department of Physics, School of Engineering, University of Petroleum and Energy studies, Dehradun-248007, Uttarakhand, India
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Chen Y, Fan Q, Li J, Wen N, Chen M, Jin H, Kuang Q, Dong Y, Zhao Y. Preparation and electrochemical performance of nanowire-shape Na3Mn2-xFex(P2O7)(PO4) for sodium ion battery and lithium ion battery. Dalton Trans 2022; 51:4173-4181. [DOI: 10.1039/d1dt04055c] [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
A series of Fe-doped Na3Mn2-xFex(P2O7)(PO4) (x = 0.0, 0.2, 0.4) (abbreviated as NMFP-0/NMFP-0.2/NMFP-0.4) compounds have been successfully prepared by using sol-gel method. The Rietveld refinement results indicate that single-phase Na3Mn2-xFex(P2O7)(PO4)...
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30
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Tang T, Zhang Q, Bai X, Wang Z, Guan J. Enhanced oxygen evolution activity on mesoporous cobalt-iron oxides. Chem Commun (Camb) 2021; 57:11843-11846. [PMID: 34698742 DOI: 10.1039/d1cc04178a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To solve the energy crisis and environmental pollution problems, the use of clean and renewable energy to replace fossil energy has become a top priority. The oxygen evolution reaction (OER) is the core of many renewable energy technologies. Developing low-cost and high-performance OER electrocatalysts is the key to implementing efficient energy conversion processes. Here, we synthesize ordered mesoporous iron-cobalt oxides using a hard template strategy. As a mesoporous oxide catalyst, meso-CoFe0.05Ox exhibits low OER overpotentials of 280 and 373 mV at current densities of 10 and 100 mA cm-2, respectively, and does not show deactivation for at least 18 hours at 100 mA cm-2. The introduction of iron can change the electronic structure of Co, and the orbital electrons are easily transferred from cobalt to iron. The enhanced OER performance can be attributed to concerted catalysis between the iron and cobalt sites that lowers the OER energy barrier, and the large specific surface area of the porous oxide providing efficient active sites for the reaction.
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Affiliation(s)
- Tianmi Tang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, 2519 Jiefang Road, Changchun 130021, P. R. China.
| | - Qiaoqiao Zhang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, 2519 Jiefang Road, Changchun 130021, P. R. China.
| | - Xue Bai
- Institute of Physical Chemistry, College of Chemistry, Jilin University, 2519 Jiefang Road, Changchun 130021, P. R. China.
| | - Zhenlu Wang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, 2519 Jiefang Road, Changchun 130021, P. R. China.
| | - Jingqi Guan
- Institute of Physical Chemistry, College of Chemistry, Jilin University, 2519 Jiefang Road, Changchun 130021, P. R. China.
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31
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Bagus PS, Schacherl B, Vitova T. Computational and Spectroscopic Tools for the Detection of Bond Covalency in Pu(IV) Materials. Inorg Chem 2021; 60:16090-16102. [PMID: 34634201 PMCID: PMC8564760 DOI: 10.1021/acs.inorgchem.1c01331] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Plutonium is used as a major component of new-generation nuclear fuels and of radioisotope batteries for Mars rovers, but it is also an environmental pollutant. Plutonium clearly has high technological and environmental importance, but it has an extremely complex, not well-understood electronic structure. The level of covalency of the Pu 5f valence orbitals and their role in chemical bonding are still an enigma and thus at the frontier of research in actinide science. We performed fully relativistic quantum chemical computations of the electronic structure of the Pu4+ ion and the PuO2 compound. Using four different theoretical tools, it is shown that the 5f orbitals have very little covalent character although the 5f(7/2) a2u orbital with the highest orbital energy has the greatest extent of covalency in PuO2. It is illustrated that the Pu M4,5 edge high-energy resolution X-ray absorption near-edge structure (Pu M4,5 HR-XANES) spectra cannot be interpreted in terms of dipole selection rules applied between individual 3d and 5f orbitals, but the selection rules must be applied between the total wavefunctions for the initial and excited states. This is because the states cannot be represented by single determinants. They are shown to involve major redistributions on the 5f electrons over the different 5f orbitals. These redistributions could be viewed as shake-up-like excitations in the 5f shell from the lowest orbital energy from J = 5f(5/2) into higher orbital energy J = 5f(7/2). We show that the second peak in the Pu M4 edge and the high-energy shoulder of the Pu M5 edge HR-XANES spectra probe the 5f(7/2) a2u orbital; thus, these spectral features are expected to change upon bond variations. We describe theoretical and spectroscopy tools, which can be applied for all actinide elements in materials with cubic structure.
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Affiliation(s)
- Paul S Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, United States
| | - Bianca Schacherl
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, D-76021 Karlsruhe, Germay
| | - Tonya Vitova
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, D-76021 Karlsruhe, Germay
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Kahk JM, Michelitsch GS, Maurer RJ, Reuter K, Lischner J. Core Electron Binding Energies in Solids from Periodic All-Electron Δ-Self-Consistent-Field Calculations. J Phys Chem Lett 2021; 12:9353-9359. [PMID: 34549969 DOI: 10.1021/acs.jpclett.1c02380] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Theoretical calculations of core electron binding energies are required for the interpretation of experimental X-ray photoelectron spectra, but achieving accurate results for solids has proven difficult. In this work, we demonstrate that accurate absolute core electron binding energies in both metallic and insulating solids can be obtained from periodic all-electron Δ-self-consistent-field (ΔSCF) calculations. In particular, we show that core electron binding energies referenced to the valence band maximum can be obtained as total energy differences between two (N - 1)-electron systems: one with a core hole and one with an electron removed from the highest occupied valence state. To achieve convergence with respect to the supercell size, the analogy between localized core holes and charged defects is exploited. Excellent agreement between calculated and experimental core electron binding energies is found for both metals and insulators, with a mean absolute error of 0.24 eV for the systems considered.
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Affiliation(s)
- J Matthias Kahk
- Department of Materials, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
- Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411 Tartu, Estonia
| | - Georg S Michelitsch
- Chair for Theoretical Chemistry, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
| | - Reinhard J Maurer
- Chair for Theoretical Chemistry, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
- Department of Chemistry, University of Warwick, Gibbet Hill Rd., Coventry CV4 7AL, United Kingdom
| | - Karsten Reuter
- Chair for Theoretical Chemistry, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
| | - Johannes Lischner
- Department of Physics and Department of Materials, and the Thomas Young Centre for Theory and Simulation of Materials, Imperial College London, London SW7 2AZ, United Kingdom
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Bagus PS, Nelin CJ, Brundle CR, Crist BV, Lahiri N, Rosso KM. Comments on the Theory of Complex XPS Spectra: Extracting Chemical Information from the Fe 3p XPS of Fe Oxides. COMMENT INORG CHEM 2021. [DOI: 10.1080/02603594.2021.1938007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Paul S. Bagus
- Department of Chemistry, University of North Texas, Denton, Texas, USA
| | | | - C. R. Brundle
- C. R. Brundle and Associates, Soquel, California, USA
| | | | - N. Lahiri
- Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Kevin M. Rosso
- Pacific Northwest National Laboratory, Richland, Washington, USA
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