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Qin C, Luo J, Zhang D, Brennan L, Tian S, Berry A, Campbell BM, Sadtler B. Light-Mediated Electrochemical Synthesis of Manganese Oxide Enhances Its Stability for Water Oxidation. ACS NANOSCIENCE AU 2023; 3:310-322. [PMID: 37601919 PMCID: PMC10436374 DOI: 10.1021/acsnanoscienceau.3c00002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 04/07/2023] [Accepted: 04/10/2023] [Indexed: 08/22/2023]
Abstract
New methods are needed to increase the activity and stability of earth-abundant catalysts for electrochemical water splitting to produce hydrogen fuel. Electrodeposition has been previously used to synthesize manganese oxide films with a high degree of disorder and a mixture of oxidation states for Mn, which has led to electrocatalysts with high activity but low stability for the oxygen evolution reaction (OER) at high current densities. In this study, we show that multipotential electrodeposition of manganese oxide under illumination produces nanostructured films with significantly higher stability for the OER compared to films grown under otherwise identical conditions in the dark. Manganese oxide films grown by multipotential deposition under illumination sustain a current density of 10 mA/cm2 at 2.2 V versus reversible hydrogen electrode for 18 h (pH 13). Illumination does not enhance the activity or stability of manganese oxide films grown using a constant potential, and films grown by multipotential deposition in the dark undergo a complete loss of activity within 1 h of electrolysis. Electrochemical and structural characterization indicate that photoexcitation of the films during growth reduces Mn ions and changes the content and structure of intercalated potassium ions and water molecules in between the disordered layers of birnessite-like sheets of MnOx, which stabilizes the nanostructured film during electrocatalysis. These results demonstrate that combining multiple external stimuli (i.e., light and an external potential) can induce structural changes not attainable by either stimulus alone to make earth-abundant catalysts more active and stable for important chemical transformations such as water oxidation.
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Affiliation(s)
- Chu Qin
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Jiang Luo
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Dongyan Zhang
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Logan Brennan
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Shijun Tian
- Department
of Physics, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Ashlynn Berry
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Brandon M. Campbell
- 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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2
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Kitchamsetti N, Samtham M, Singh D, Choudhary E, Rondiya SR, Ma YR, Cross RW, Dzade NY, Devan RS. Hierarchical 2D MnO2@1D mesoporous NiTiO3 core-shell hybrid structures for high-performance supercapattery electrodes: Theoretical and experimental investigations. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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3
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Sun X, Mao M, Zheng Z, Wang J, Wu Z, Li X, Lin Z, Liu W. Solar irradiation accelerates the oxidation of Cr(III) by δ-manganese dioxide. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130150. [PMID: 36257107 DOI: 10.1016/j.jhazmat.2022.130150] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/17/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Cr(VI) has been observed to be released from Cr(III)-bearing natural sources or residues when they are found alongside manganese and manganese oxides. However, relevant mechanism studies normally ignore the effect of simulated solar irradiation on this oxidation reaction. Therefore, we investigated the photochemical reaction between Cr(OH)3 and δ-MnO2, the common species of chromium and manganese oxide found in the environment. At pH 11, the oxidation of Cr(OH)3 by δ-MnO2 was accelerated under simulated solar irradiation, which had an oxidation rate 2.7-fold greater than that in the dark condition. Further investigation revealed that δ-MnO2, an n-type semiconductor with a 2.7 eV band gap, can be excited by light with wavelengths < 459 nm and produce photogenic electrons and holes. These photo-induced carriers reacted with surrounding molecules to form free radicals and participate the redox reactions. Free-radical quenching experiments indicated that hydroxyl radicals (•OH) are the main oxidants of Cr(III) under simulated solar irradiation. This work provides new mechanistic insight into the oxidation of Cr(III) to Cr(VI), which may help clarifying the environmental fate of Cr and the potential solar-triggered release of Cr(VI).
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Affiliation(s)
- Xing Sun
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China
| | - Minlin Mao
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China
| | - Zhengqiang Zheng
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China
| | - Jiaxin Wang
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China
| | - Zhen Wu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China
| | - Xiaoqin Li
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China.
| | - Zhang Lin
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, PR China
| | - Weizhen Liu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China.
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4
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Fan K, Chen Q, Zhao J, Liu Y. Preparation of MnO 2-Carbon Materials and Their Applications in Photocatalytic Water Treatment. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:541. [PMID: 36770501 PMCID: PMC9921467 DOI: 10.3390/nano13030541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/17/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Water pollution is one of the most important problems in the field of environmental protection in the whole world, and organic pollution is a critical one for wastewater pollution problems. How to solve the problem effectively has triggered a common concern in the area of environmental protection nowadays. Around this problem, scientists have carried out a lot of research; due to the advantages of high efficiency, a lack of secondary pollution, and low cost, photocatalytic technology has attracted more and more attention. In the past, MnO2 was seldom used in the field of water pollution treatment due to its easy agglomeration and low catalytic activity at low temperatures. With the development of carbon materials, it was found that the composite of carbon materials and MnO2 could overcome the above defects, and the composite had good photocatalytic performance, and the research on the photocatalytic performance of MnO2-carbon materials has gradually become a research hotspot in recent years. This review covers recent progress on MnO2-carbon materials for photocatalytic water treatment. We focus on the preparation methods of MnO2 and different kinds of carbon material composites and the application of composite materials in the removal of phenolic compounds, antibiotics, organic dyes, and heavy metal ions in water. Finally, we present our perspective on the challenges and future research directions of MnO2-carbon materials in the field of environmental applications.
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Affiliation(s)
- Kun Fan
- Chinese Research Academy of Environment Sciences, Beijing 100012, China
| | - Qing Chen
- Chinese Research Academy of Environment Sciences, Beijing 100012, China
- Ecological and Environmental Protection Company, China South-to-North Water Diversion Corporation Limited, Beijing 100036, China
| | - Jian Zhao
- Chinese Research Academy of Environment Sciences, Beijing 100012, China
| | - Yue Liu
- Chinese Research Academy of Environment Sciences, Beijing 100012, China
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5
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Lv Y, Liu J, Chen C, Lin X, Wu X, Chen Q, He H, Zhu R. Enhanced immobilization of phosphate by ferrihydrite during the photoreductive dissolution process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:155835. [PMID: 35550904 DOI: 10.1016/j.scitotenv.2022.155835] [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: 01/30/2022] [Revised: 04/19/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
The surface interactions of iron (hydr)oxides with various environmental chemicals play a vital role in controlling their environmental transport and fate. As a bioessential element, phosphorus and its biogeochemical cycling are usually controlled by its adsorption on iron (hydr)oxides. Photoreductive dissolution of iron (hydr)oxides can change their surface structure and properties, but its influence on the adsorption of phosphate remains unknown. Here, an enhanced removal of phosphate during the photoreductive dissolution of ferrihydrite (Fh) was investigated. The Kd value of phosphate adsorption on Fh under light irradiation is evidently larger than that in the dark (21 vs 13 L/g). Zeta potential determination in combination with X-ray photoelectron spectroscopy analysis suggested that the released Fe2+ from Fh surface during photoreductive dissolution can be oxidized to Fe3+, which then co-adsorb with phosphate back to Fh surface, enhancing the immobilization of phosphate on Fh. In situ ATR-FTIR results disclosed that light irradiation could further facilitate the formation of ternary complexes and surface precipitation on Fh, even after the increment of phosphate adsorption becoming negligible in the dark, and the relative content of surface precipitation increased evidently. The desorption ratio of phosphate from the irradiated Fh sample was reduced, which should be attributed to a high content of surface precipitation that can tightly bind phosphate on Fh. The findings of this study highlight an important yet previously unappreciated pathway that light irradiation can enhance the immobilization of phosphate on iron (hydr)oxides.
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Affiliation(s)
- Ying Lv
- CAS Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Liu
- Macau University of Science and Technology, State Key Laboratory of Lunar and Planetary Sciences, Avenida Wai Long, Taipa, Macau, China
| | - Chaorong Chen
- CAS Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoju Lin
- CAS Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao Wu
- CAS Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qingze Chen
- CAS Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongping He
- CAS Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Runliang Zhu
- CAS Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China..
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6
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Morinson-Negrete JD, Ortega-López C, Espitia-Rico MJ. Effects of Mono-Vacancies of Oxygen and Manganese on the Properties of the MnO 2/Graphene Heterostructure. MATERIALS 2022; 15:ma15082731. [PMID: 35454425 PMCID: PMC9032963 DOI: 10.3390/ma15082731] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 03/27/2022] [Accepted: 04/01/2022] [Indexed: 01/13/2023]
Abstract
The effects of the monovacancies of oxygen (VO) and manganese (VMn) on the structural and electronic properties of the 1T−MnO2/graphene heterostructure are investigated, within the framework of density functional theory (DFT). We found that the values of the formation energy for the heterostructure without and with vacancies of VO and VMn were −20.99 meVÅ2 , −32.11meVÅ2, and −20.81 meVÅ2, respectively. The negative values of the formation energy indicate that the three heterostructures are energetically stable and that they could be grown in the experiment (exothermic processes). Additionally, it was found that the presence of monovacancies of VO and VMn in the heterostructure induce: (a) a slight decrease in the interlayer separation distance in the 1T−MnO2/graphene heterostructure of ~0.13% and ~1.41%, respectively, and (b) a contraction of the (Mn−O) bond length of the neighboring atoms of the VO and VMn monovacancies of ~2.34% and ~6.83%, respectively. Calculations of the Bader charge for the heterostructure without and with VO and VMn monovacancies show that these monovacancies induce significant changes in the charge of the first-neighbor atoms of the VO and VMn vacancies, generating chemically active sites (locales) that could favor the adsorption of external atoms and molecules. From the analysis of the density of state and the structure of the bands, we found that the graphene conserves the Dirac cone in the heterostructure with or without vacancies, while the 1T−MnO2 monolayer in the heterostructures without and with VO monovacancies exhibits half-metallic and magnetic behavior. These properties mainly come from the hybridization of the 3d−Mn and 2p−O states. In both cases, the heterostructure possesses a magnetic moment of 3.00 μβ/Mn. From this behavior, it can be inferred the heterostructures with and without VO monovacancies could be used in spintronics.
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Affiliation(s)
- Juan David Morinson-Negrete
- Grupo Avanzado de Materiales y Sistemas Complejos GAMASCO, Universidad de Córdoba, Montería CP 230001, Colombia; (J.D.M.-N.); (C.O.-L.)
- Doctorado en Ciencias Física, Universidad de Córdoba, Montería CP 203001, Colombia
- Grupo de Investigación AMDAC, Institución Educativa José María Córdoba, Montería CP 230001, Colombia
| | - César Ortega-López
- Grupo Avanzado de Materiales y Sistemas Complejos GAMASCO, Universidad de Córdoba, Montería CP 230001, Colombia; (J.D.M.-N.); (C.O.-L.)
- Doctorado en Ciencias Física, Universidad de Córdoba, Montería CP 203001, Colombia
| | - Miguel J. Espitia-Rico
- Grupo GEFEM, Universidad Distrital Francisco José de Caldas, Bogotá CP 110111, Colombia
- Correspondence: ; Tel.: +57-6013239300 (ext. 1516)
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7
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Yan Y, Jiang N, Liu X, Pan J, Li M, Wang C, Camargo PHC, Wang J. Enhanced Spontaneous Antibacterial Activity of δ-MnO 2 by Alkali Metals Doping. Front Bioeng Biotechnol 2022; 9:788574. [PMID: 35059387 PMCID: PMC8764136 DOI: 10.3389/fbioe.2021.788574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 11/15/2021] [Indexed: 11/29/2022] Open
Abstract
Recently, the widespread use of antibiotics is becoming a serious worldwide public health challenge, which causes antimicrobial resistance and the occurrence of superbugs. In this context, MnO2 has been proposed as an alternative approach to achieve target antibacterial properties on Streptococcus mutans (S. mutans). This requires a further understanding on how to control and optimize antibacterial properties in these systems. We address this challenge by synthesizing δ-MnO2 nanoflowers doped by magnesium (Mg), sodium (Na), and potassium (K) ions, thus displaying different bandgaps, to evaluate the effect of doping on the bacterial viability of S. mutans. All these samples demonstrated antibacterial activity from the spontaneous generation of reactive oxygen species (ROS) without external illumination, where doped MnO2 can provide free electrons to induce the production of ROS, resulting in the antibacterial activity. Furthermore, it was observed that δ-MnO2 with narrower bandgap displayed a superior ability to inhibit bacteria. The enhancement is mainly attributed to the higher doping levels, which provided more free electrons to generate ROS for antibacterial effects. Moreover, we found that δ-MnO2 was attractive for in vivo applications, because it could nearly be degraded into Mn ions completely following the gradual addition of vitamin C. We believe that our results may provide meaningful insights for the design of inorganic antibacterial nanomaterials.
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Affiliation(s)
- Yali Yan
- College of Science, Donghua University, Shanghai, China
| | - Ning Jiang
- Department of Oral and Craniomaxillofacial Science, Shanghai Key Laboratory of Stomatology, College of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xin Liu
- Department of Dental Materials, Shanghai Key Laboratory of Stomatology, Shanghai Biomaterials Research and Testing Center, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, Shanghai, China
| | - Jie Pan
- Department of Orthodontics, Shanghai Stomatological Hospital, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, China
| | - Mai Li
- College of Science, Donghua University, Shanghai, China
| | - Chunrui Wang
- College of Science, Donghua University, Shanghai, China
| | | | - Jiale Wang
- College of Science, Donghua University, Shanghai, China.,Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai, China
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8
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Zhao C, Yang B, Liao R, Hong M, Yu S, Wang J, Qiu G. Catalytic mechanism of manganese ions and visible light on chalcopyrite bioleaching in the presence of Acidithiobacillus ferrooxidans. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2021.10.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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9
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Zeng X, Shan C, Sun M, Ding D, Rong S. Graphene enhanced α-MnO2 for photothermal catalytic decomposition of carcinogen formaldehyde. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.12.085] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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10
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Sato K, Yonesato K, Yatabe T, Yamaguchi K, Suzuki K. Nanostructured Manganese Oxides within a Ring-Shaped Polyoxometalate Exhibiting Unusual Oxidation Catalysis. Chemistry 2021; 28:e202104051. [PMID: 34870869 DOI: 10.1002/chem.202104051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Indexed: 11/07/2022]
Abstract
Nanosized manganese oxides have recently received considerable attention for their synthesis, structures, and potential applications. Although various synthetic methods have been developed, precise synthesis of novel nanostructured manganese oxides are still challenging. In this study, using a structurally defined nanosized cavity inside a ring-shaped polyoxometalate, we succeeded in synthesizing two types of discrete 18 and 20 nuclear nanostructured manganese oxides, Mn18 and Mn20, respectively. In particular, Mn18 showed much higher catalytic activity than other manganese oxides for the oxygenation of alkylarenes including electron-deficient ones, and the reaction proceeded through a unique reaction mechanism due to its unusual manganese oxide structure.
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Affiliation(s)
- Kai Sato
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kentaro Yonesato
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Takafumi Yatabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kosuke Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
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11
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Cestellos-Blanco S, Kim JM, Watanabe NG, Chan RR, Yang P. Molecular insights and future frontiers in cell photosensitization for solar-driven CO 2 conversion. iScience 2021; 24:102952. [PMID: 34458701 PMCID: PMC8379512 DOI: 10.1016/j.isci.2021.102952] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The conversion of CO2 to value-added products powered with solar energy is an ideal solution to establishing a closed carbon cycle. Combining microorganisms with light-harvesting nanomaterials into photosynthetic biohybrid systems (PBSs) presents an approach to reaching this solution. Metabolic pathways precisely evolved for CO2 fixation selectively and reliably generate products. Nanomaterials harvest solar light and biocompatibly associate with microorganisms owing to similar lengths scales. Although this is a nascent field, a variety of approaches have been implemented encompassing different microorganisms and nanomaterials. To advance the field in an impactful manner, it is paramount to understand the molecular underpinnings of PBSs. In this perspective, we highlight studies inspecting charge uptake pathways and singularities in photosensitized cells. We discuss further analyses to more completely elucidate these constructs, and we focus on criteria to be met for designing photosensitizing nanomaterials. As a result, we advocate for the pairing of microorganisms with naturally occurring and highly biocompatible mineral-based semiconductor nanomaterials.
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Affiliation(s)
| | - Ji Min Kim
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | | | | | - Peidong Yang
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
- Department of Chemistry, University of California, Berkeley, CA, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Kavli Energy NanoScience Institute at the University of California, Berkeley, CA, USA
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12
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Li J, Zhang Q, Yuan H, Luo K, Liu Y, Hu W, Xu M, Xu S. Chemically synthesized (Ag, Mn 2O 3)-codecorated ZnO nanoparticles for achieving superior visible light-induced photodegradation and enhanced gas sensing activity. Phys Chem Chem Phys 2021; 23:13797-13807. [PMID: 34075962 DOI: 10.1039/d1cp00716e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Heterostructural engineering and noble metal coupling are effective strategies to optimize semiconductor photocatalytic materials. In this work, (Ag, Mn2O3)-codecorated ZnO nanoparticles with different Mn2O3 contents (0-10 mol%) were synthesized by integrating the two strategies by a facile two-step polymer network-gel process. The photocatalytic activity of Ag/ZnO (AZM0) was significantly enhanced with the optimum Mn2O3 molar ratio of 3 mol%. The degradation efficiency of AZM3 is ∼3 times and ∼4.8 times higher than that of AZM0 for the degradation of methylene blue (MB) upon exposure to simulated sunlight and visible light, respectively. Also, this ternary nanocomposite exhibits enhanced gas sensing performance towards NO2 under ultraviolet/visible light irradiation at room temperature. The analysis of its microstructural, optical and photoelectrical characteristics suggests the synergistic coupling effects of Ag and Mn2O3, in which the significantly enhanced visible light response and hetero-interface charge carrier migration are the critical factors for the improvement of photocatalytic efficiency and gas sensing activity. Furthermore, the effects of recycling ability, the influence of the initial solution pH, the catalyst dosage and the main active species during the catalysis process on photocatalytic activity were explored. This study develops a feasible pathway to consciously construct multiheterostructures for enhancing the photocatalytic activity with great potential applications in toxic pollution abatement and noxious gas detection.
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Affiliation(s)
- Jing Li
- College of Electronic Information & Key Lab of Information Materials of Sichuan Province, Southwest University for Nationalities, Chengdu 610041, China.
| | - Qiuping Zhang
- College of Electronic Information & Key Lab of Information Materials of Sichuan Province, Southwest University for Nationalities, Chengdu 610041, China.
| | - Huan Yuan
- College of Electronic Information & Key Lab of Information Materials of Sichuan Province, Southwest University for Nationalities, Chengdu 610041, China.
| | - Kaiyi Luo
- College of Electronic Information & Key Lab of Information Materials of Sichuan Province, Southwest University for Nationalities, Chengdu 610041, China.
| | - Yutong Liu
- College of Electronic Information & Key Lab of Information Materials of Sichuan Province, Southwest University for Nationalities, Chengdu 610041, China.
| | - Wenyu Hu
- College of Electronic Information & Key Lab of Information Materials of Sichuan Province, Southwest University for Nationalities, Chengdu 610041, China.
| | - Ming Xu
- College of Electronic Information & Key Lab of Information Materials of Sichuan Province, Southwest University for Nationalities, Chengdu 610041, China.
| | - Shuyan Xu
- Plasma Sources and Application Center/Space Propulsion Centre Singapore, NIE, and Institute of Advanced Studies, Nanyang Technological University, 637616, Singapore
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13
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Li Y, Jiang G, Ouyang N, Qin Z, Lan S, Zhang Q. The Controlled Synthesis of Birnessite Nanoflowers via H 2O 2 Reducing KMnO 4 For Efficient Adsorption and Photooxidation Activity. Front Chem 2021; 9:699513. [PMID: 34124012 PMCID: PMC8187863 DOI: 10.3389/fchem.2021.699513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 05/14/2021] [Indexed: 11/13/2022] Open
Abstract
Birnessite nanoflowers composed of layers have been proven to be the strongest adsorbent and oxidant in the surface environment. However, the current synthesis methods of birnessite nanoflowers are suffering from long reaction time and high reaction temperature. Based on these, this paper explores a new method for the rapid and controlled synthesis of layered manganese oxides. The method relies on the molar ratios of KMnO4 and H2O2 redox reacting species to drive the production of birnessite nanoflowers under acidic conditions. The molar ratios of KMnO4 and H2O2 are the key to the crystal structure of the as-prepared. It was found that when the molar ratios of KMnO4 and H2O2 is from 1:1.25 to 1:1.90, the sample is birnessite nanoflowers, and when the ratio is increased to 1:2.0, the sample is a mixture of birnessite nanoflowers and feitknechtite nanoplates. Among the as-prepared samples, BF-1.85 (molar ratios of KMnO4 and H2O2 is 1:1.85) shows the highest capacity for Pb2+ adsorption (2,955 mmol/kg) and greatest degradation efficiency of phenol and TOC. The method proposed herein is economical and controllable, and it yields products with high efficiency for the elimination of inorganic and organic pollutants.
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Affiliation(s)
- Yang Li
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, China
| | - Guanjie Jiang
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, China
| | - Nanqi Ouyang
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, China
| | - Zhangjie Qin
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, China
| | - Shuai Lan
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, China
| | - Qin Zhang
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, China
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14
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Raizada P, Kumar A, Hasija V, Singh P, Thakur VK, Khan AAP. An overview of converting reductive photocatalyst into all solid-state and direct Z-scheme system for water splitting and CO2 reduction. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.09.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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Khan K, Tareen AK, Aslam M, Sagar RUR, Zhang B, Huang W, Mahmood A, Mahmood N, Khan K, Zhang H, Guo Z. Recent Progress, Challenges, and Prospects in Two-Dimensional Photo-Catalyst Materials and Environmental Remediation. NANO-MICRO LETTERS 2020; 12:167. [PMID: 34138161 PMCID: PMC7770787 DOI: 10.1007/s40820-020-00504-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 07/12/2020] [Indexed: 05/03/2023]
Abstract
The successful photo-catalyst library gives significant information on feature that affects photo-catalytic performance and proposes new materials. Competency is considerably significant to form multi-functional photo-catalysts with flexible characteristics. Since recently, two-dimensional materials (2DMs) gained much attention from researchers, due to their unique thickness-dependent uses, mainly for photo-catalytic, outstanding chemical and physical properties. Photo-catalytic water splitting and hydrogen (H2) evolution by plentiful compounds as electron (e-) donors is estimated to participate in constructing clean method for solar H2-formation. Heterogeneous photo-catalysis received much research attention caused by their applications to tackle numerous energy and environmental issues. This broad review explains progress regarding 2DMs, significance in structure, and catalytic results. We will discuss in detail current progresses of approaches for adjusting 2DMs-based photo-catalysts to assess their photo-activity including doping, hetero-structure scheme, and functional formation assembly. Suggested plans, e.g., doping and sensitization of semiconducting 2DMs, increasing electrical conductance, improving catalytic active sites, strengthening interface coupling in semiconductors (SCs) 2DMs, forming nano-structures, building multi-junction nano-composites, increasing photo-stability of SCs, and using combined results of adapted approaches, are summed up. Hence, to further improve 2DMs photo-catalyst properties, hetero-structure design-based 2DMs' photo-catalyst basic mechanism is also reviewed.
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Affiliation(s)
- Karim Khan
- School of Electrical Engineering and Intelligentization, Dongguan University of Technology (DGUT), Dongguan, 523808, Guangdong, People's Republic of China.
- Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen, 518060, People's Republic of China.
| | - Ayesha Khan Tareen
- Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen, 518060, People's Republic of China
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China
| | - Muhammad Aslam
- Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen, 518060, People's Republic of China
- Government Degree College Paharpur, Gomel University, Dera Ismail Khan, K.P.K, Islamic Republic of Pakistan
| | - Rizwan Ur Rehman Sagar
- School of Materials Science and Engineering, Jiangxi University of Science and Technology, Jiangxi, 341000, People's Republic of China
| | - Bin Zhang
- Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen, 518060, People's Republic of China
| | - Weichun Huang
- Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen, 518060, People's Republic of China
| | - Asif Mahmood
- School of Chemical and Bio-Molecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Nasir Mahmood
- School of Engineering, The Royal Melbourne Institute of Technology (RMIT) University, Melbourne, VIC, Australia
| | - Kishwar Khan
- Research Laboratory of Electronics (RLE), Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
| | - Han Zhang
- Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen, 518060, People's Republic of China.
| | - Zhongyi Guo
- School of Electrical Engineering and Intelligentization, Dongguan University of Technology (DGUT), Dongguan, 523808, Guangdong, People's Republic of China.
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16
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Tian H, Zeng L, Huang Y, Ma Z, Meng G, Peng L, Chen C, Cui X, Shi J. In Situ Electrochemical Mn(III)/Mn(IV) Generation of Mn(II)O Electrocatalysts for High-Performance Oxygen Reduction. NANO-MICRO LETTERS 2020; 12:161. [PMID: 34138138 PMCID: PMC7770805 DOI: 10.1007/s40820-020-00500-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 07/09/2020] [Indexed: 05/14/2023]
Abstract
Highlights MnO rich in oxygen vacancies has been synthesized. The synthesized MnO demonstrates excellent oxygen reduction reaction performance and high output power in Zn–air battery. The high catalytic activity is attributed to the synergetic catalytic effect between oxygen vacancies and in situ generated Mn3+/Mn4+. Abstract Among various earth-abundant and noble metal-free catalysts for oxygen reduction reaction (ORR), manganese-based oxides are promising candidates owing to the rich variety of manganese valence. Herein, an extremely facile method for the synthesis of cubic and orthorhombic phase coexisting Mn(II)O electrocatalyst as an efficient ORR catalyst was explored. The obtained MnO electrocatalyst with oxygen vacancies shows a significantly elevated ORR catalytic activity with a half-wave potential (E 1/2) of as high as 0.895 V, in comparison with that of commercial Pt/C (E 1/2 = 0.877 V). More impressively, the MnO electrocatalyst exhibits a marked activity enhancement after test under a constant applied potential for 1000 s thanks to the in situ generation and stable presence of high-valence manganese species (Mn3+ and Mn4+) during the electrochemical process, initiating a synergetic catalytic effect with oxygen vacancies, which is proved to largely accelerate the adsorption and reduction of O2 molecules favoring the ORR activity elevation. Such an excellent ORR catalytic performance of this MnO electrocatalyst is applied in Zn–air battery, which shows an extra-high peak power density of 63.2 mW cm−2 in comparison with that (47.4 mW cm−2) of commercial Pt/C under identical test conditions. Electronic supplementary material The online version of this article (10.1007/s40820-020-00500-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Han Tian
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Liming Zeng
- College of Chemistry and Molecular Sciences, Hubei Key Lab of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, People's Republic of China
| | - Yifan Huang
- Wuhan University of Science and Technology, Wuhan, 430081, People's Republic of China
| | - Zhonghua Ma
- College of Material Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - Ge Meng
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Lingxin Peng
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Chang Chen
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Xiangzhi Cui
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310021, People's Republic of China.
| | - Jianlin Shi
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
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17
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Rondiya SR, Karbhal I, Jadhav CD, Nasane MP, Davies TE, Shelke MV, Jadkar SR, Chavan PG, Dzade NY. Uncovering the origin of enhanced field emission properties of rGO-MnO 2 heterostructures: a synergistic experimental and computational investigation. RSC Adv 2020; 10:25988-25998. [PMID: 35518634 PMCID: PMC9055343 DOI: 10.1039/d0ra03360j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/15/2020] [Indexed: 11/21/2022] Open
Abstract
The unique structural merits of heterostructured nanomaterials including the electronic interaction, interfacial bonding and synergistic effects make them attractive for fabricating highly efficient optoelectronic devices. Herein, we report the synthesis of MnO2 nanorods and a rGO/MnO2 nano-heterostructure using low-cost hydrothermal and modified Hummers' methods, respectively. Detailed characterization and confirmation of the structural and morphological properties are done via X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM). Compared to the isolated MnO2 nanorods, the rGO/MnO2 nano-heterostructure exhibits impressive field emission (FE) performance in terms of the low turn-on field of 1.4 V μm−1 for an emission current density of 10 μA cm−2 and a high current density of 600 μA cm−2 at a relatively very low applied electric field of 3.1 V μm−1. The isolated MnO2 nanorods display a high turn-on field of 7.1 for an emission current density of 10 μA cm−2 and a low current density of 221 μA cm−2 at an applied field of 8.1 V μm−1. Besides the superior FE characteristics of the rGO/MnO2 nano-heterostructure, the emission current remains quite stable over the continuous 2 h period of measurement. The improvement of the FE characteristics of the rGO/MnO2 nano-heterostructure can be ascribed to the nanometric features and the lower work function (6.01 and 6.12 eV for the rGO with 8% and 16% oxygen content) compared to the isolated α-MnO2(100) surface (Φ = 7.22 eV) as predicted from complementary first-principles electronic structure calculations based on density functional theory (DFT) methods. These results suggest that an appropriate coupling of rGO with MnO2 nanorods would have a synergistic effect of lowering the electronic work function, resulting in a beneficial tuning of the FE characteristics. The unique structural merits of heterostructured nanomaterials including the electronic interaction, interfacial bonding and synergistic effects make them attractive for fabricating highly efficient optoelectronic devices.![]()
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Affiliation(s)
- Sachin R Rondiya
- School of Chemistry, Cardiff University Main Building, Park Place Cardiff CF10 3AT Wales UK
| | - Indrapal Karbhal
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory Pune 411008 MH India
| | - Chandradip D Jadhav
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, College of Materials and Metallurgy, Wuhan University of Science and Technology Wuhan 430081 P. R. China
| | - Mamta P Nasane
- Department of Physics, Savitribai Phule Pune University Pune 411007 India
| | - Thomas E Davies
- School of Chemistry, Cardiff University Main Building, Park Place Cardiff CF10 3AT Wales UK
| | - Manjusha V Shelke
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory Pune 411008 MH India
| | - Sandesh R Jadkar
- Department of Physics, Savitribai Phule Pune University Pune 411007 India
| | - Padmakar G Chavan
- Department of Physics, School of Physical Sciences, Kavayitri Bahinabai Chaudhari North Maharashtra University Jalgaon 425001 India
| | - Nelson Y Dzade
- School of Chemistry, Cardiff University Main Building, Park Place Cardiff CF10 3AT Wales UK
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18
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Natarajan K, Saraf M, Gupta AK, Mobin SM. Nanostructured δ-MnO2/Cd(OH)2 Heterojunction Constructed under Ambient Conditions as a Sustainable Cathode for Photocatalytic Hydrogen Production. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00341] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Chiam SL, Pung SY, Yeoh FY. Recent developments in MnO 2-based photocatalysts for organic dye removal: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:5759-5778. [PMID: 31933078 DOI: 10.1007/s11356-019-07568-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023]
Abstract
The textile industry consumes a large volume of organic dyes and water. These organic dyes, which remained in the effluents, are usually persistent and difficult to degrade by conventional wastewater treatment techniques. If the wastewater is not treated properly and is discharged into water system, it will cause environmental pollution and risk to living organisms. To mitigate these impacts, the photo-driven catalysis process using semiconductor materials emerges as a promising approach. The semiconductor photocatalysts are able to remove the organic effluent through their mineralization and decolorization abilities. Besides the commonly used titanium dioxide (TiO2), manganese dioxide (MnO2) is a potential photocatalyst for wastewater treatment. MnO2 has a narrow bandgap energy of 1~2 eV. Thus, it possesses high possibility to be driven by visible light and infrared light for dye degradation. This paper reviews the MnO2-based photocatalysts in various aspects, including its fundamental and photocatalytic mechanisms, recent progress in the synthesis of MnO2 nanostructures in particle forms and on supporting systems, and regeneration of photocatalysts for repeated use. In addition, the effect of various factors that could affect the photocatalytic performance of MnO2 nanostructures are discussed, followed by the future prospects of the development of this semiconductor photocatalysts towards commercialization.
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Affiliation(s)
- Sin-Ling Chiam
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia
| | - Swee-Yong Pung
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia.
| | - Fei-Yee Yeoh
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia
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20
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Ren B, Wang Y, Ou JZ. Engineering two-dimensional metal oxides via surface functionalization for biological applications. J Mater Chem B 2020; 8:1108-1127. [DOI: 10.1039/c9tb02423a] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Schematic illustration of 2D MO nanosheets for applications in biosystems.
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Affiliation(s)
- Baiyu Ren
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- China
- School of Resources and Environmental Engineering
| | - Yichao Wang
- School of Engineering
- RMIT University
- Melbourne
- Australia
| | - Jian Zhen Ou
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- China
- School of Engineering
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21
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Mathur A, Kaushik R, Halder A. Visible-light-driven photo-enhanced zinc–air batteries using synergistic effect of different types of MnO 2 nanostructures. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01581d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Solar light enhanced the charge generation which leads to better O redox reactions.
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Affiliation(s)
- Ankita Mathur
- School of Engineering
- Indian Institute of Technology Mandi
- Mandi
- India
| | - Ravinder Kaushik
- School of Basic Sciences
- Indian Institute of Technology Mandi
- Mandi
- India
| | - Aditi Halder
- School of Basic Sciences
- Indian Institute of Technology Mandi
- Mandi
- India
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22
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Khosravi M, Feizi H, Haghighi B, Allakhverdiev SI, Najafpour MM. Photoelectrochemistry of manganese oxide/mixed phase titanium oxide heterojunction. NEW J CHEM 2020. [DOI: 10.1039/c9nj06265c] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoelectrochemistry of manganese oxide/mixed phase titanium oxide was studied.
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Affiliation(s)
- Mehdi Khosravi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
| | - Hadi Feizi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
| | - Behzad Haghighi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
- Department of Chemistry
| | - Suleyman I. Allakhverdiev
- Controlled Photobiosynthesis Laboratory
- K.A. Timiryazev Institute of Plant Physiology
- Russian Academy of Sciences
- Moscow 127276
- Russia
| | - Mohammad Mahdi Najafpour
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
- Center of Climate Change and Global Warming
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23
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Peng Y, Ye C, Yan R, Lei Y, Ye D, Hong H, Cai T. Activatable Core-Shell Metallofullerene: An Efficient Nanoplatform for Bimodal Sensing of Glutathione. ACS APPLIED MATERIALS & INTERFACES 2019; 11:46637-46644. [PMID: 31747242 DOI: 10.1021/acsami.9b18807] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Metallofullerenes have attracted considerable attention as potential novel noninvasive high-relaxivity magnetic resonance contrast agents. However, the applications of metallofullerenes as stimuli-responsive biosensors to monitor biological processes are still scarce. Herein, manganese-fullerenes core-shell nanocomposites are prepared via a facile one-pot approach to achieve GSH-activatable magnetic resonance/fluorescence bimodal imaging functions. The nanocomposites initially have a FRET-induced quenched fluorescence, and water-resisting stimulated low T1-MRI contrast. Upon exposure to GSH, collapse of the outer MnO2 shell led to reconstruction of the nanoprobes and subsequently resulted in multicolor fluorescence recovery and longitudinal (T1) relaxivity enhancement (r1 value up to 29.8 mM-1 s-1 at 0.5 T based on Mn ion). Our work demonstrates feasibility of using fullerenes to fabricate activatable probes for molecular imaging of GSH, which may promote the development of new fullerene-based stimuli-responsive multimodal probes for the detection and regulation of particular biological processes in vivo.
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Affiliation(s)
- Yayun Peng
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Chao Ye
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Runqi Yan
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , China
| | - Yuzhu Lei
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Deju Ye
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , China
| | - Hao Hong
- School of Medicine , Nanjing University , Nanjing 210093 , China
| | - Ting Cai
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
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24
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Taniguchi T, Li S, Nurdiwijayanto L, Kobayashi Y, Saito T, Miyata Y, Obata S, Saiki K, Yokoi H, Watanabe K, Taniguchi T, Tsukagoshi K, Ebina Y, Sasaki T, Osada M. Tunable Chemical Coupling in Two-Dimensional van der Waals Electrostatic Heterostructures. ACS NANO 2019; 13:11214-11223. [PMID: 31580052 DOI: 10.1021/acsnano.9b04256] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Heterostructures of two-dimensional (2D) atomic crystals provide fascinating molecular-scale design elements for emergent physical phenomena and functional materials, as integrating distinct monolayers into vertical heterostructures can afford coupling between disparate properties. However, the available examples have been limited to either van der Waals (vdW) or electrostatic (ES) heterostructures that are solely composed of noncharged and charged monolayers, respectively. Here, we propose a "vdW-ES heterostructure" chemical design in which charge-neutral and charged monolayer-building blocks with highly disparate chemical and physical properties are conjugated vertically through asymmetrically charged interfaces. We demonstrate vdW-ES heteroassembly of semiconducting MoS2 and dielectric Ca2Nb3O10- (CNO) monolayers using an amphipathic molecular starch, resulting in the emergence of trion luminescence observed at the lowest energy among MoS2-related materials, probably due to interfacial confinement effects given by vdW-ES dual interactions. In addition, interface engineering leads to tailored exciton of the vdW/ES heterostructures owing to the pronounced dielectric proximity effects, bringing an intriguing interlayer chemistry to modify 2D materials. Furthermore, the current approach was successfully extended to create a graphene/CNO heterostructure, which verifies the versatility of the preparative method.
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Affiliation(s)
- Takaaki Taniguchi
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Shisheng Li
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Leanddas Nurdiwijayanto
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Yu Kobayashi
- Department of Physics , Tokyo Metropolitan University , Hachioji , Tokyo 192-0397 , Japan
| | - Tetsuki Saito
- Department of Physics , Tokyo Metropolitan University , Hachioji , Tokyo 192-0397 , Japan
| | - Yasumitsu Miyata
- Department of Physics , Tokyo Metropolitan University , Hachioji , Tokyo 192-0397 , Japan
| | - Seiji Obata
- Department of Complexity Science and Engineering , Graduate School of Frontier Sciences, The University of Tokyo , Kashiwa , Chiba 277-8561 , Japan
| | - Koichiro Saiki
- Department of Complexity Science and Engineering , Graduate School of Frontier Sciences, The University of Tokyo , Kashiwa , Chiba 277-8561 , Japan
| | - Hiroyuki Yokoi
- Faculty of Advanced Science and Technology , Kumamoto University , Kumamoto 860-8555 , Japan
| | - Kenji Watanabe
- Research Center for Functional Materials , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Takashi Taniguchi
- Research Center for Functional Materials , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Kazuhito Tsukagoshi
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Yasuo Ebina
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Takayoshi Sasaki
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Minoru Osada
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
- Institute of Materials and Systems for Sustainability , Nagoya University , Furocho, Chikusa-ku, Nagoya 464-8603 , Japan
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Zhou B, Li Z, Wang J, Niu X, Luan C. Tunable valley splitting and an anomalous valley Hall effect in hole-doped WS 2 by proximity coupling with a ferromagnetic MnO 2 monolayer. NANOSCALE 2019; 11:13567-13575. [PMID: 31290895 DOI: 10.1039/c9nr03315g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Two-dimensional (2D) valleytronic systems can provide information storage and processing advantages that complement or surpass those of conventional charge and spin-based semiconductor technologies. For efficient use of the valley degree of freedom, the major challenge currently is to lift the valley degeneracy to achieve valley splitting for further valleytronic operations. In this work, we demonstrate that valley splitting and efficient hole-doping in monolayer WS2 can be achieved by the proximity coupling effect of 2D ferromagnetic MnO2 using density functional theory and Berry curvature calculations. A valley splitting of 43 meV is induced in the valence band of WS2. The efficient hole-doping moves the Fermi level just located between the valence band maxima of the K and K' valleys, which is suitable for the valley-polarized transport. The magnitude of valley splitting relies on the strength of interfacial orbital hybridization and can be tuned continually by applying interfacial compression or an electric field. Owing to the sizable Berry curvature and time-reversal symmetry breaking of WS2, a spin- and valley-polarized anomalous Hall current can be generated. Then, we proposed a valleytronic device that can be used as a filter for both the spin and valley based on this WS2/MnO2 van der Waals heterostructure.
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Affiliation(s)
- Baozeng Zhou
- Tianjin Key Laboratory of Film Electronic & Communicate Devices, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Zheng Li
- Tianjin Key Laboratory of Film Electronic & Communicate Devices, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Jiaming Wang
- Tianjin Key Laboratory of Film Electronic & Communicate Devices, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Xuechen Niu
- Tianjin Key Laboratory of Film Electronic & Communicate Devices, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Chongbiao Luan
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
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Hu S, Liu X, Wang C, Camargo PHC, Wang J. Tuning Thermal Catalytic Enhancement in Doped MnO 2-Au Nano-Heterojunctions. ACS APPLIED MATERIALS & INTERFACES 2019; 11:17444-17451. [PMID: 31013046 DOI: 10.1021/acsami.9b03879] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Sodium (Na)- and potassium (K)-doped δ-MnO2, which presented different band gaps, were synthesized by a hydrothermal method. Then, uniform Au nanoparticles (NPs) were deposited on MnO2 to form metal-semiconductor nano-heterojunctions (MnO2-Au). By comparing their temperature-dependent thermal catalytic performances, p-aminothiophenol to p, p'-dimercaptoazobenzene conversion was used as proof-of-concept transformations. MnO2-Au hybrid materials demonstrated better thermal catalytic performances relative to individual Au NPs. Meanwhile, K-doped MnO2-Au, with a MnO2 support displaying a narrower bandgap, displayed superior catalytic activities relative to Na-doped MnO2-Au. To get the same catalytic performance by individual Au NPs, it can be ∼50 K less by Na-doped MnO2-Au and ∼100 K less by K-doped MnO2-Au. The enhancement is mainly attributed to the thermally excited electrons in MnO2, which were transferred to Au NPs. The additional electrons in Au NPs increase the electron density and thus contribute to the improvement of thermal catalysis. Our findings show that the establishment of a nano-heterojunction formed by metal NPs on a semiconductor support has a significant impact on thermal catalysis, where a narrower band gap can facilitate thermally excited carriers and thus bring about better catalytic performances. Thus, the results presented here shed light on the design of a nano-heterojunction catalyst to approach reactions with superior performance under moderate conditions.
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Affiliation(s)
| | | | | | - Pedro H C Camargo
- Department of Chemistry , University of Helsinki , A.I. Virtasen aukio 1 , FI-00014 Helsinki , Finland
- Departamento de Química Fundamental, Instituto de Química , Universidade de São Paulo , Av. Prof. Lineu Prestes, 748 , 05508-000 São Paulo-SP , Brazil
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Photoelectric conversion on Earth's surface via widespread Fe- and Mn-mineral coatings. Proc Natl Acad Sci U S A 2019; 116:9741-9746. [PMID: 31010932 DOI: 10.1073/pnas.1902473116] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Sunlight drives photosynthesis and associated biological processes, and also influences inorganic processes that shape Earth's climate and geochemistry. Bacterial solar-to-chemical energy conversion on this planet evolved to use an intricate intracellular process of phototrophy. However, a natural nonbiological counterpart to phototrophy has yet to be recognized. In this work, we reveal the inherent "phototrophic-like" behavior of vast expanses of natural rock/soil surfaces from deserts, red soils, and karst environments, all of which can drive photon-to-electron conversions. Using scanning electron microscopy, transmission electron microscopy, micro-Raman spectroscopy, and X-ray absorption spectroscopy, Fe and Mn (oxyhydr)oxide-rich coatings were found in rock varnishes, as were Fe (oxyhydr)oxides on red soil surfaces and minute amounts of Mn oxides on karst rock surfaces. By directly fabricating a photoelectric detection device on the thin section of a rock varnish sample, we have recorded an in situ photocurrent micromapping of the coatings, which behave as highly sensitive and stable photoelectric systems. Additional measurements of red soil and powder separated from the outermost surface of karst rocks yielded photocurrents that are also sensitive to irradiation. The prominent solar-responsive capability of the phototrophic-like rocks/soils is ascribed to the semiconducting Fe- and Mn (oxyhydr)oxide-mineral coatings. The native semiconducting Fe/Mn-rich coatings may play a role similar, in part, to photosynthetic systems and thus provide a distinctive driving force for redox (bio)geochemistry on Earth's surfaces.
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Soldatova AV, Balakrishnan G, Oyerinde OF, Romano CA, Tebo BM, Spiro TG. Biogenic and Synthetic MnO 2 Nanoparticles: Size and Growth Probed with Absorption and Raman Spectroscopies and Dynamic Light Scattering. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:4185-4197. [PMID: 30905145 DOI: 10.1021/acs.est.8b05806] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
MnO2 nanoparticles, similar to those found in soils and sediments, have been characterized via their UV-visible and Raman spectra, combined with dynamic light scattering and reactivity measurements. Synthetic colloids were prepared by thiosulfate reduction of permanganate, their sizes controlled with adsorbates acting as capping agents: bicarbonate, phosphate, and pyrophosphate. Biogenic colloids, products of the manganese oxidase, Mnx, were similarly characterized. The band-gap energies of the colloids were found to increase with decreasing hydrodynamic diameter, Dh, and were proportional to 1/ Dh2, as predicted from quantum confinement theory. The intensity ratio of the two prominent Mn-O stretching Raman bands also varied with particle size, consistent with the ratio of edge to bulk Mn atoms. Reactivity of the synthetic colloids toward reduction by Mn2+, in the presence of pyrophosphate to trap the Mn3+ product, was proportional to the surface to volume ratio, but showed surprising complexity. There was also a remnant unreactive fraction, likely attributable to Mn(III)-induced surface passivation. The band gap was similar for biogenic and synthetic colloids of similar size, but decreased when the enzyme solution contained pyrophosphate, which traps the intermediate Mn(III) and slows MnO2 growth. The band gap/size correlation was used to analyze the growth of the enzymatically produced MnO2 oxides.
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Affiliation(s)
- Alexandra V Soldatova
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195 , United States
| | - Gurusamy Balakrishnan
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195 , United States
| | - Oyeyemi F Oyerinde
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195 , United States
| | - Christine A Romano
- Division of Environmental and Biomolecular Systems , Oregon Health & Science University , Portland , Oregon 97239 , United States
| | - Bradley M Tebo
- Division of Environmental and Biomolecular Systems , Oregon Health & Science University , Portland , Oregon 97239 , United States
| | - Thomas G Spiro
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195 , United States
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Chen J, Meng H, Tian Y, Yang R, Du D, Li Z, Qu L, Lin Y. Recent advances in functionalized MnO 2 nanosheets for biosensing and biomedicine applications. NANOSCALE HORIZONS 2019; 4:321-338. [PMID: 32254087 DOI: 10.1039/c8nh00274f] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
As one kind of redox active layered transition-metal dioxide nanomaterials, single-layer manganese dioxide (MnO2) nanosheets have gained significant research attention in the fields of biosensing and biomedicine because of their large surface area, intense and broad optical absorption, strong oxidation ability, catalytic activity, and robust mechanical properties. This review provides a brief overview of the recent advances in the development of MnO2 nanosheet-based biosensors, bioimaging as well as drug delivery for cancer therapy. The methodologies for the preparation of MnO2 nanosheets are summarized, followed by an introduction of the nanostructure and properties of MnO2 nanosheets. Special attention is paid to their applications in biosensing, bioimaging and cancer therapy. Future perspectives and the challenges of high-performance MnO2 nanosheets are also discussed.
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Affiliation(s)
- Juan Chen
- Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China.
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30
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Fu XL, Hou F, Liu FR, Ren SW, Cao JT, Liu YM. Electrochemiluminescence energy resonance transfer in 2D/2D heterostructured g-C3N4/MnO2 for glutathione detection. Biosens Bioelectron 2019; 129:72-78. [DOI: 10.1016/j.bios.2019.01.010] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 12/30/2018] [Accepted: 01/03/2019] [Indexed: 02/08/2023]
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31
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Meng A, Zhang L, Cheng B, Yu J. TiO 2-MnO x-Pt Hybrid Multiheterojunction Film Photocatalyst with Enhanced Photocatalytic CO 2-Reduction Activity. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5581-5589. [PMID: 29718652 DOI: 10.1021/acsami.8b02552] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photocatalytic CO2 conversion into solar fuels has an alluring prospect. However, the rapid recombination of photogenerated electron-hole pairs for TiO2-based photocatalyst hinders its wide application. To alleviate this bottleneck, a ternary hybrid TiO2-MnO x-Pt composite is excogitated. Taking advantage of the surface junction between {001} and {101} facets, MnO x nanosheets and Pt nanoparticles are selectively deposited on each facet by a facile photodeposition method. This design accomplishes the formation of two heterojunctions: p-n junction between MnO x and TiO2 {001} facet and metal-semiconductor junction between Pt and TiO2 {101} facet. Both of them, together with the surface heterojunction between {001} and {101} facets, are contributive to the spatial separation of the photogenerated electron-hole pairs. Thanks to their cooperative and synergistic effect, the as-prepared composite photocatalyst exhibits a promoted yield of CH4 and CH3OH, which is over threefold of pristine TiO2 nanosheets films. The conjecture of the mechanism that selective formation of multijunction structure maximizes the separation and transfer efficiency of photogenerated charge carriers is proved by the photoelectrochemical analysis. This work not only successfully achieves an efficient multijunction photocatalyst by ingenious design but also provides insight into the mechanism of the performance enhancement.
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Affiliation(s)
- Aiyun Meng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan 430070 , P. R. China
| | - Liuyang Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan 430070 , P. R. China
| | - Bei Cheng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan 430070 , P. R. China
| | - Jiaguo Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan 430070 , P. R. China
- Department of Physics, Faculty of Science , King Abdulaziz University , Jeddah 21589 , Saudi Arabia
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32
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Khosravi M, Feizi H, Bagheri R, Song Z, Haghighi B, Najafpour MM. Investigation of the photoelectrochemical properties of layered manganese oxide. NEW J CHEM 2019. [DOI: 10.1039/c8nj06162a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The photoelectrochemical properties of layered manganese oxide were investigated.
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Affiliation(s)
- Mehdi Khosravi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
| | - Hadi Feizi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
| | - Robabeh Bagheri
- Surface Protection Research Group
- Surface Department
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo 315201
| | - Zhenlun Song
- Surface Protection Research Group
- Surface Department
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo 315201
| | - Behzad Haghighi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
- Department of Chemistry
| | - Mohammad Mahdi Najafpour
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
- Center of Climate Change and Global Warming
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Natarajan K, Saraf M, Mobin SM. Visible light driven water splitting through an innovative Cu-treated-δ-MnO 2 nanostructure: probing enhanced activity and mechanistic insights. NANOSCALE 2018; 10:13250-13260. [PMID: 29971292 DOI: 10.1039/c8nr03027h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this study, we have fabricated nanostructured thin films of δ-MnO2 on FTO glass substrates by a facile, room-temperature and low cost chemical bath deposition method. A copper treatment procedure in the synthesis steps results in a film of Cu-δ-MnO2, which displays significant photoactivity when used as a photocathode for hydrogen evolution reaction, with a photocurrent of 3.59 mA cm-2 (at 0 V vs. RHE) in a mild acidic solution. Furthermore, the electrodes also display significant electrocatalytic activity towards water oxidation reaching up to 10 mA cm-2 (at only 1.67 V vs. RHE). The Cu-δ-MnO2 film has been thoroughly characterized via various physicochemical, optical and electrochemical techniques, and an attempt has been made to explain the conductivity mechanism. It is suggested that Cu treatment enhances the photoactivity of δ-MnO2 films through a series of surface dominated processes, which facilitate reduced recombination and enhanced hole consumption at the interface of the electrode and electrolyte. These results establish birnessite-based manganese dioxides as suitable candidates for electrodes in water splitting cells and pave the way for atomic-level engineering of earth abundant materials to reach the ultimate goal of low-cost, sustainable generation of hydrogen.
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Affiliation(s)
- Kaushik Natarajan
- Metallurgy Engineering and Materials Science, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India.
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Liu WX, Zhu XL, Liu SQ, Gu QQ, Meng ZD. Near-Infrared-Driven Selective Photocatalytic Removal of Ammonia Based on Valence Band Recognition of an α-MnO 2/N-Doped Graphene Hybrid Catalyst. ACS OMEGA 2018; 3:5537-5546. [PMID: 31458757 PMCID: PMC6641723 DOI: 10.1021/acsomega.8b00161] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 04/09/2018] [Indexed: 05/30/2023]
Abstract
Near-infrared (NIR)-response photocatalysts are desired to make use of 44% NIR solar irradiation. A flower-like α-MnO2/N-doped graphene (NG) hybrid catalyst was synthesized and characterized by X-ray diffraction spectroscopy, transmission electron microscopy, Raman spectroscopy, UV-vis-NIR diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The flower-like material of α-MnO2/NG was oval-shaped with the semi major axis of 140 nm and semi minor axis of 95 nm and the petal thickness of 3.5-8.0 nm. The indirect band gap was measured to be 1.16 eV, which is very close to 0.909 eV estimated by the first-principles calculation. The band gap can harvest NIR irradiation to 1069 nm. The coupling of α-MnO2 with NG sheets to form α-MnO2/NG can significantly extend the spectrum response up to 1722 nm, improving dramatically the photocatalytic activity. The experimental results displayed that the α-MnO2/NG hybrid catalyst can recognize ammonia in methyl orange (MO)-ammonia, rhodamine B (RHB)-ammonia, and humic acid-ammonia mixed solutions and selectively degrade ammonia. The degradation ratio of ammonia reached over 93.0% upon NIR light irradiation in the mixed solutions, while those of MO, RHB, and humic acid were only 9.7, 9.4, and 15.7%, respectively. The products formed during the photocatalytic process were followed with ion chromatography, gas chromatography, and electrochemistry. The formed nitrogen gas has been identified during the photocatalytic process. A valence band recognition model was suggested based on the selective degradation of ammonia via α-MnO2/NG.
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Affiliation(s)
| | | | - Shou-Qing Liu
- E-mail: , . Phone: +86-512-69379159. Fax: +86-512-69379159.
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35
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Investigation of the optoelectronic behavior of Pb-doped CdO nanostructures. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0705-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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36
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Chang HW, Fu Y, Lee WY, Lu YR, Huang YC, Chen JL, Chen CL, Chou WC, Chen JM, Lee JF, Shen S, Dong CL. Visible light-induced electronic structure modulation of Nb- and Ta-doped α-Fe 2O 3 nanorods for effective photoelectrochemical water splitting. NANOTECHNOLOGY 2018; 29:064002. [PMID: 29176050 DOI: 10.1088/1361-6528/aa9d75] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The photoelectrochemical (PEC) water splitting activity of Nb and Ta-doped hematite (α-Fe2O3) nanorods was investigated with reference to electronic structures by in situ synchrotron x-ray absorption spectroscopy (XAS). Current density-potential measurements demonstrate that the PEC activity of α-Fe2O3 nanorods depends strongly on the species and concentrations of dopants. The doping of α-Fe2O3 nanorods with a low level of Nb or Ta can improve their electrical conductivity and thereby facilitate charge transport and reduced electron-hole recombination therein. The photoconversion effects of Nb and Ta-doped α-Fe2O3 by in situ XAS in the dark and under illumination revealed opposite evolutions of the spectral intensities of the Fe L-edge and Nb/Ta L-edge, indicating that charge transfer and a conduction pathway are involved in the photoconversion. Analytic in situ XAS results reveal that the α-Fe2O3 that is doped with a low level of Nb has a greater photoconversion efficiency than that doped with Ta because Nb sites are more active than Ta sites in α-Fe2O3. The correlation between PEC activity and the electronic structure of Nb/Ta-doped α-Fe2O3 is examined in detail using in situ XAS and helps to elucidate the mechanism of PEC water splitting in terms of the electronic structure.
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Affiliation(s)
- Han-Wei Chang
- Department of Physics, Tamkang University, Tamsui 25137, Taiwan. Research Center for X-ray Science, Tamkang University, Tamsui 25137, Taiwan
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37
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Li J, Du B, Li Y, Wang Y, Wu D, Wei Q. A turn-on fluorescent sensor for highly sensitive mercury(ii) detection based on a carbon dot-labeled oligodeoxyribonucleotide and MnO2 nanosheets. NEW J CHEM 2018. [DOI: 10.1039/c7nj04120a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ssDNA–QDs can bind to MnO2 nanosheets with a higher appetency than dsDNA–QDs.
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Affiliation(s)
- Jingshuai Li
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Bin Du
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Yuewen Li
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Yaoguang Wang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Dan Wu
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Qin Wei
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
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38
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Liu L, Zhao C, Huang Y, Wei X, Yu H, Yang J. Transparent lamellar porous material and its greatly reduced dielectric constant. Macromol Res 2017. [DOI: 10.1007/s13233-017-5141-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Soldatova AV, Tao L, Romano CA, Stich TA, Casey WH, Britt RD, Tebo BM, Spiro TG. Mn(II) Oxidation by the Multicopper Oxidase Complex Mnx: A Binuclear Activation Mechanism. J Am Chem Soc 2017; 139:11369-11380. [PMID: 28712284 DOI: 10.1021/jacs.7b02771] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The bacterial protein complex Mnx contains a multicopper oxidase (MCO) MnxG that, unusually, catalyzes the two-electron oxidation of Mn(II) to MnO2 biomineral, via a Mn(III) intermediate. Although Mn(III)/Mn(II) and Mn(IV)/Mn(III) reduction potentials are expected to be high, we find a low reduction potential, 0.38 V (vs Normal Hydrogen Electrode, pH 7.8), for the MnxG type 1 Cu2+, the electron acceptor. Indeed the type 1 Cu2+ is not reduced by Mn(II) in the absence of molecular oxygen, indicating that substrate oxidation requires an activation step. We have investigated the enzyme mechanism via electronic absorption spectroscopy, using chemometric analysis to separate enzyme-catalyzed MnO2 formation from MnO2 nanoparticle aging. The nanoparticle aging time course is characteristic of nucleation and particle growth; rates for these processes followed expected dependencies on Mn(II) concentration and temperature, but exhibited different pH optima. The enzymatic time course is sigmoidal, signaling an activation step, prior to turnover. The Mn(II) concentration and pH dependence of a preceding lag phase indicates weak Mn(II) binding. The activation step is enabled by a pKa > 8.6 deprotonation, which is assigned to Mn(II)-bound H2O; it induces a conformation change (consistent with a high activation energy, 106 kJ/mol) that increases Mn(II) affinity. Mnx activation is proposed to decrease the Mn(III/II) reduction potential below that of type 1 Cu(II/I) by formation of a hydroxide-bridged binuclear complex, Mn(II)(μ-OH)Mn(II), at the substrate site. Turnover is found to depend cooperatively on two Mn(II) and is enabled by a pKa 7.6 double deprotonation. It is proposed that turnover produces a Mn(III)(μ-OH)2Mn(III) intermediate that proceeds to the enzyme product, likely Mn(IV)(μ-O)2Mn(IV) or an oligomer, which subsequently nucleates MnO2 nanoparticles. We conclude that Mnx exploits manganese polynuclear chemistry in order to facilitate an otherwise difficult oxidation reaction, as well as biomineralization. The mechanism of the Mn(III/IV) conversion step is elucidated in an accompanying paper .
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Affiliation(s)
- Alexandra V Soldatova
- Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195, United States
| | | | - Christine A Romano
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University , Portland, Oregon 97239, United States
| | | | | | | | - Bradley M Tebo
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University , Portland, Oregon 97239, United States
| | - Thomas G Spiro
- Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195, United States
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40
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Lin Y, Zhou Q, Tang D, Niessner R, Knopp D. Signal-On Photoelectrochemical Immunoassay for Aflatoxin B1 Based on Enzymatic Product-Etching MnO2 Nanosheets for Dissociation of Carbon Dots. Anal Chem 2017; 89:5637-5645. [DOI: 10.1021/acs.analchem.7b00942] [Citation(s) in RCA: 286] [Impact Index Per Article: 40.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Youxiu Lin
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Collaborative Innovation Center of Detection Technology for Haixi Food Safety and Products (Fujian Province), State Key Laboratory of Photocatalysis on Energy and Environment, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Qian Zhou
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Collaborative Innovation Center of Detection Technology for Haixi Food Safety and Products (Fujian Province), State Key Laboratory of Photocatalysis on Energy and Environment, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Dianping Tang
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Collaborative Innovation Center of Detection Technology for Haixi Food Safety and Products (Fujian Province), State Key Laboratory of Photocatalysis on Energy and Environment, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Reinhard Niessner
- Chair
for Analytical Chemistry, Institute of Hydrochemistry, Technische Universität München, Marchioninistrasse 17, München D-81377, Germany
| | - Dietmar Knopp
- Chair
for Analytical Chemistry, Institute of Hydrochemistry, Technische Universität München, Marchioninistrasse 17, München D-81377, Germany
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41
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Self-Organized TiO₂-MnO₂ Nanotube Arrays for Efficient Photocatalytic Degradation of Toluene. Molecules 2017; 22:molecules22040564. [PMID: 28362359 PMCID: PMC6154631 DOI: 10.3390/molecules22040564] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/27/2017] [Accepted: 03/28/2017] [Indexed: 11/16/2022] Open
Abstract
Vertically oriented, self-organized TiO₂-MnO₂ nanotube arrays were successfully obtained by one-step anodic oxidation of Ti-Mn alloys in an ethylene glycol-based electrolyte. The as-prepared samples were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), UV-Vis absorption, photoluminescence spectroscopy, X-ray diffraction (XRD), and micro-Raman spectroscopy. The effect of the applied potential (30-50 V), manganese content in the alloy (5-15 wt. %) and water content in the electrolyte (2-10 vol. %) on the morphology and photocatalytic properties was investigated for the first time. The photoactivity was assessed in the toluene removal reaction under visible light, using low-powered LEDs as an irradiation source (λmax = 465 nm). Morphology analysis showed that samples consisted of auto-aligned nanotubes over the surface of the alloy, their dimensions were: diameter = 76-118 nm, length = 1.0-3.4 μm and wall thickness = 8-11 nm. It was found that the increase in the applied potential led to increase the dimensions while the increase in the content of manganese in the alloy brought to shorter nanotubes. Notably, all samples were photoactive under the influence of visible light and the highest degradation achieved after 60 min of irradiation was 43%. The excitation mechanism of TiO₂-MnO₂ NTs under visible light was presented, pointing out the importance of MnO₂ species for the generation of e- and h⁺.
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42
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Mo L, Li J, Liu Q, Qiu L, Tan W. Nucleic acid-functionalized transition metal nanosheets for biosensing applications. Biosens Bioelectron 2017; 89:201-211. [PMID: 27020066 PMCID: PMC5554413 DOI: 10.1016/j.bios.2016.03.044] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 02/20/2016] [Accepted: 03/17/2016] [Indexed: 12/13/2022]
Abstract
In clinical diagnostics, as well as food and environmental safety practices, biosensors are powerful tools for monitoring biological or biochemical processes. Two-dimensional (2D) transition metal nanomaterials, including transition metal chalcogenides (TMCs) and transition metal oxides (TMOs), are receiving growing interest for their use in biosensing applications based on such unique properties as high surface area and fluorescence quenching abilities. Meanwhile, nucleic acid probes based on Watson-Crick base-pairing rules are also being widely applied in biosensing based on their excellent recognition capability. In particular, the emergence of functional nucleic acids in the 1980s, especially aptamers, has substantially extended the recognition capability of nucleic acids to various targets, ranging from small organic molecules and metal ions to proteins and cells. Based on π-π stacking interaction between transition metal nanosheets and nucleic acids, biosensing systems can be easily assembled. Therefore, the combination of 2D transition metal nanomaterials and nucleic acids brings intriguing opportunities in bioanalysis and biomedicine. In this review, we summarize recent advances of nucleic acid-functionalized transition metal nanosheets in biosensing applications. The structure and properties of 2D transition metal nanomaterials are first discussed, emphasizing the interaction between transition metal nanosheets and nucleic acids. Then, the applications of nucleic acid-functionalized transition metal nanosheet-based biosensors are discussed in the context of different signal transducing mechanisms, including optical and electrochemical approaches. Finally, we provide our perspectives on the current challenges and opportunities in this promising field.
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Affiliation(s)
- Liuting Mo
- Molecular Sciences and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering and College of Biology, Collaborative Innovation Center for Molecular Engineering and Theranostics, Hunan University, Changsha 410082, China
| | - Juan Li
- Molecular Sciences and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering and College of Biology, Collaborative Innovation Center for Molecular Engineering and Theranostics, Hunan University, Changsha 410082, China; The Key Lab of Analysis and Detection Technology for Food Safety of the MOE and Fujian Province, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Qiaoling Liu
- Molecular Sciences and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering and College of Biology, Collaborative Innovation Center for Molecular Engineering and Theranostics, Hunan University, Changsha 410082, China.
| | - Liping Qiu
- Molecular Sciences and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering and College of Biology, Collaborative Innovation Center for Molecular Engineering and Theranostics, Hunan University, Changsha 410082, China
| | - Weihong Tan
- Molecular Sciences and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering and College of Biology, Collaborative Innovation Center for Molecular Engineering and Theranostics, Hunan University, Changsha 410082, China; Department of Chemistry and Department of Physiology and Functional Genomics, Center for Research at the Bio/Nano Interface, UF Health Cancer Center, University of Florida, Gainesville, FL 32611-7200, USA.
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43
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Zhang H, Ding H, Wang X, Zeng C, Lu A, Li Y, Wang C. Photoelectrochemical performance of birnessite films and photoelectrocatalytic activity toward oxidation of phenol. J Environ Sci (China) 2017; 52:259-267. [PMID: 28254046 DOI: 10.1016/j.jes.2016.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 04/01/2016] [Accepted: 04/11/2016] [Indexed: 06/06/2023]
Abstract
Birnessite films on fluorine-doped tin oxide (FTO) coated glass were prepared by cathodic reduction of aqueous KMnO4. The deposited birnessite films were characterized with X-ray diffraction, Raman spectroscopy, scanning electron microscopy and atomic force microscopy. The photoelectrochemical activity of birnessite films was investigated and a remarkable photocurrent in response to visible light was observed in the presence of phenol, resulting from localized manganese d-d transitions. Based on this result, the photoelectrocatalytic oxidation of phenol was investigated. Compared with phenol degradation by the electrochemical oxidation process or photocatalysis separately, a synergetic photoelectrocatalytic degradation effect was observed in the presence of the birnessite film coated FTO electrode. Photoelectrocatalytic degradation ratios were influenced by film thickness and initial phenol concentrations. Phenol degradation with the thinnest birnessite film and initial phenol concentration of 10mg/L showed the highest efficiency of 91.4% after 8hr. Meanwhile, the kinetics of phenol removal was fit well by the pseudofirst-order kinetic model.
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Affiliation(s)
- Huiqin Zhang
- The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China.
| | - Hongrui Ding
- The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China.
| | - Xin Wang
- Institutes of Science and Development, Chinese Academy of Sciences, Beijing 100190, China
| | - Cuiping Zeng
- The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China
| | - Anhuai Lu
- The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China.
| | - Yan Li
- The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China
| | - Changqiu Wang
- The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China
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44
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Jin K, Seo H, Hayashi T, Balamurugan M, Jeong D, Go YK, Hong JS, Cho KH, Kakizaki H, Bonnet-Mercier N, Kim MG, Kim SH, Nakamura R, Nam KT. Mechanistic Investigation of Water Oxidation Catalyzed by Uniform, Assembled MnO Nanoparticles. J Am Chem Soc 2017; 139:2277-2285. [PMID: 28029792 DOI: 10.1021/jacs.6b10657] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The development of active water oxidation catalysts is critical to achieve high efficiency in overall water splitting. Recently, sub-10 nm-sized monodispersed partially oxidized manganese oxide nanoparticles were shown to exhibit not only superior catalytic performance for oxygen evolution, but also unique electrokinetics, as compared to their bulk counterparts. In the present work, the water-oxidizing mechanism of partially oxidized MnO nanoparticles was investigated using integrated in situ spectroscopic and electrokinetic analyses. We successfully demonstrated that, in contrast to previously reported manganese (Mn)-based catalysts, Mn(III) species are stably generated on the surface of MnO nanoparticles via a proton-coupled electron transfer pathway. Furthermore, we confirmed as to MnO nanoparticles that the one-electron oxidation step from Mn(II) to Mn(III) is no longer the rate-determining step for water oxidation and that Mn(IV)═O species are generated as reaction intermediates during catalysis.
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Affiliation(s)
- Kyoungsuk Jin
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea
| | - Toru Hayashi
- Department of Applied Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.,Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science (CSRS) , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mani Balamurugan
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea
| | - Donghyuk Jeong
- Western Seoul Center, Korea Basic Science Institute (KBSI) , 150, Bukahyeon-ro, Seodaemun-gu, Seoul 120-140, Korea
| | - Yoo Kyung Go
- Western Seoul Center, Korea Basic Science Institute (KBSI) , 150, Bukahyeon-ro, Seodaemun-gu, Seoul 120-140, Korea
| | - Jung Sug Hong
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea
| | - Kang Hee Cho
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea
| | - Hirotaka Kakizaki
- Department of Applied Chemistry, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.,Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science (CSRS) , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Nadège Bonnet-Mercier
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science (CSRS) , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Min Gyu Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH) , Pohang 790-784, Korea
| | - Sun Hee Kim
- Western Seoul Center, Korea Basic Science Institute (KBSI) , 150, Bukahyeon-ro, Seodaemun-gu, Seoul 120-140, Korea
| | - Ryuhei Nakamura
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science (CSRS) , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea
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45
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Ren G, Sun M, Sun Y, Li Y, Wang C, Lu A, Ding H. A cost-effective birnessite–silicon solar cell hybrid system with enhanced performance for dye decolorization. RSC Adv 2017. [DOI: 10.1039/c7ra08468d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
A birnessite–silicon solar cell hybrid system with enhanced performance for dye decolorization.
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Affiliation(s)
- Guiping Ren
- The Key Laboratory of Orogenic Belts and Crustal Evolution
- School of Earth and Space Sciences
- Peking University
- Beijing Key Laboratory of Mineral Environmental Function
- Beijing
| | - Manyi Sun
- The Key Laboratory of Orogenic Belts and Crustal Evolution
- School of Earth and Space Sciences
- Peking University
- Beijing Key Laboratory of Mineral Environmental Function
- Beijing
| | - Yuan Sun
- The Key Laboratory of Orogenic Belts and Crustal Evolution
- School of Earth and Space Sciences
- Peking University
- Beijing Key Laboratory of Mineral Environmental Function
- Beijing
| | - Yan Li
- The Key Laboratory of Orogenic Belts and Crustal Evolution
- School of Earth and Space Sciences
- Peking University
- Beijing Key Laboratory of Mineral Environmental Function
- Beijing
| | - Changqiu Wang
- The Key Laboratory of Orogenic Belts and Crustal Evolution
- School of Earth and Space Sciences
- Peking University
- Beijing Key Laboratory of Mineral Environmental Function
- Beijing
| | - Anhuai Lu
- The Key Laboratory of Orogenic Belts and Crustal Evolution
- School of Earth and Space Sciences
- Peking University
- Beijing Key Laboratory of Mineral Environmental Function
- Beijing
| | - Hongrui Ding
- The Key Laboratory of Orogenic Belts and Crustal Evolution
- School of Earth and Space Sciences
- Peking University
- Beijing Key Laboratory of Mineral Environmental Function
- Beijing
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46
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Yuan F, Gu TT, Li XQ, Wang GL. Split photoelectrochemistry for the immunoassay of α-fetoprotein based on graphitic carbon nitride. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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47
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Shumlas SL, Singireddy S, Thenuwara AC, Attanayake NH, Reeder RJ, Strongin DR. Oxidation of arsenite to arsenate on birnessite in the presence of light. GEOCHEMICAL TRANSACTIONS 2016; 17:5. [PMID: 28316506 PMCID: PMC5053027 DOI: 10.1186/s12932-016-0037-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 09/21/2016] [Indexed: 05/30/2023]
Abstract
The effect of simulated solar radiation on the oxidation of arsenite [As(III)] to arsenate [As(V)] on the layered manganese oxide, birnessite, was investigated. Experiments were conducted where birnessite suspensions, under both anoxic and oxic conditions, were irradiated with simulated solar radiation in the presence of As(III) at pH 5, 7, and 9. X-ray absorption spectroscopy (XAS) was used to determine the nature of the adsorbed product on the surface of the birnessite. The oxidation of As(III) in the presence of birnessite under simulated solar light irradiation occurred at a rate that was faster than in the absence of light at pH 5. At pH 7 and 9, As(V) production was significantly less than at pH 5 and the amount of As(V) production for a given reaction time was the same under dark and light conditions. The first order rate constant (kobs) for As(III) oxidation in the presence of light and in the dark at pH 5 were determined to be 0.07 and 0.04 h-1, respectively. The As(V) product was released into solution along with Mn(II), with the latter product resulting from the reduction of Mn(IV) and/or Mn(III) during the As(III) oxidation process. Post-reaction XAS analysis of As(III) exposed birnessite showed that arsenic was present on the surface as As(V). Experimental results also showed no evidence that reactive oxygen species played a role in the As(III) oxidation process.
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Affiliation(s)
- Samantha L. Shumlas
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA 19122 USA
| | - Soujanya Singireddy
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA 19122 USA
| | - Akila C. Thenuwara
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA 19122 USA
| | - Nuwan H. Attanayake
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA 19122 USA
| | - Richard J. Reeder
- Department of Geosciences, Stony Brook University, Stony Brook, NY 11794 USA
| | - Daniel R. Strongin
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA 19122 USA
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48
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Wang Q, Liao X, Xu W, Ren Y, Livi KJ, Zhu M. Synthesis of Birnessite in the Presence of Phosphate, Silicate, or Sulfate. Inorg Chem 2016; 55:10248-10258. [DOI: 10.1021/acs.inorgchem.6b01465] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Qian Wang
- Department of Ecosystem
Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Xianya Liao
- Department of Ecosystem
Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Wenqian Xu
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Yang Ren
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Kenneth J. Livi
- Materials
Characterization and Processing Center, Department of Materials Science
and Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Mengqiang Zhu
- Department of Ecosystem
Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
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49
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Wang Z, Zhu W, Qiu Y, Yi X, von dem Bussche A, Kane A, Gao H, Koski K, Hurt R. Biological and environmental interactions of emerging two-dimensional nanomaterials. Chem Soc Rev 2016; 45:1750-80. [PMID: 26923057 PMCID: PMC4820079 DOI: 10.1039/c5cs00914f] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Two-dimensional materials have become a major focus in materials chemistry research worldwide with substantial efforts centered on synthesis, property characterization, and technological application. These high-aspect ratio sheet-like solids come in a wide array of chemical compositions, crystal phases, and physical forms, and are anticipated to enable a host of future technologies in areas that include electronics, sensors, coatings, barriers, energy storage and conversion, and biomedicine. A parallel effort has begun to understand the biological and environmental interactions of synthetic nanosheets, both to enable the biomedical developments and to ensure human health and safety for all application fields. This review covers the most recent literature on the biological responses to 2D materials and also draws from older literature on natural lamellar minerals to provide additional insight into the essential chemical behaviors. The article proposes a framework for more systematic investigation of biological behavior in the future, rooted in fundamental materials chemistry and physics. That framework considers three fundamental interaction modes: (i) chemical interactions and phase transformations, (ii) electronic and surface redox interactions, and (iii) physical and mechanical interactions that are unique to near-atomically-thin, high-aspect-ratio solids. Two-dimensional materials are shown to exhibit a wide range of behaviors, which reflect the diversity in their chemical compositions, and many are expected to undergo reactive dissolution processes that will be key to understanding their behaviors and interpreting biological response data. The review concludes with a series of recommendations for high-priority research subtopics at the "bio-nanosheet" interface that we hope will enable safe and successful development of technologies related to two-dimensional nanomaterials.
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Affiliation(s)
| | | | | | - Xin Yi
- School of Engineering, USA.
| | | | - Agnes Kane
- Department of Pathology and Laboratory Medicine, USA. and Institute for Molecular and Nanoscale Innovation, USA
| | | | - Kristie Koski
- Department of Chemistry, Brown University, Providence, RI 02912, USA.
| | - Robert Hurt
- School of Engineering, USA. and Institute for Molecular and Nanoscale Innovation, USA
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50
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Hao Y, Wang L, Zhang B, Zhao H, Niu M, Hu Y, Zheng C, Zhang H, Chang J, Zhang Z, Zhang Y. Multifunctional nanosheets based on folic acid modified manganese oxide for tumor-targeting theranostic application. NANOTECHNOLOGY 2016; 27:025101. [PMID: 26629735 DOI: 10.1088/0957-4484/27/2/025101] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
It is highly desirable to develop smart nanocarriers with stimuli-responsive drug-releasing and diagnostic-imaging functions for cancer theranostics. Herein, we develop a reduction and pH dual-responsive tumor theranostic platform based on degradable manganese dioxide (MnO2) nanosheets. The MnO2 nanosheets with a size of 20-60 nm were first synthesized and modified with (3-Aminopropyl) trimethoxysilane (APTMS) to get amine-functionalized MnO2, and then functionalized by NH2-PEG2000-COOH (PEG). The tumor-targeting group, folic acid (FA), was finally conjugated with the PEGylated MnO2 nanosheets. Then, doxorubicin (DOX), a chemotherapeutic agent, was loaded onto the modified nanosheets through a physical adsorption, which was designated as MnO2-PEG-FA/DOX. The prepared MnO2-PEG-FA/DOX nanosheets with good biocompatibility can not only efficiently deliver DOX to tumor cells in vitro and in vivo, leading to enhanced anti-tumor efficiency, but can also respond to a slightly acidic environment and high concentration of reduced glutathione (GSH), which caused degradation of MnO2 into manganese ions enabling magnetic resonance imaging (MRI). The longitudinal relaxation rate r1 was 2.26 mM(-1) s(-1) at pH 5.0 containing 2 mM GSH. These reduction and pH dual-responsive biodegradable nanosheets combining efficient MRI and chemotherapy provide a novel and promising platform for tumor-targeting theranostic application.
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Affiliation(s)
- Yongwei Hao
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan Province 450001, People's Republic of China
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