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Nguyen NT, Ho DQ, Trung NT. Theoretical insights into the adsorption and gas sensing performance of Fe/Cu-adsorbed graphene. Phys Chem Chem Phys 2024; 26:14265-14276. [PMID: 38690852 DOI: 10.1039/d4cp00561a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
The binding mechanism of gas molecules on material surfaces is essential for understanding adsorption and sensing performance. In the present study, we examine the interaction of some volatile organic compounds (VOCs), including HCHO, C2H5OH, and CH3COCH3, on pristine graphene and its Fe/Cu-adsorbed surfaces using first-principles calculations. The results indicate that the adsorption of these molecules on graphene is regarded as physisorption, while chemisorption is observed for Fe/Cu attached surfaces. The binding of sites on molecules and surfaces primarily involves hydrogen bonds for the pure form of graphene. In contrast, stable interactions occur at functional groups such as >CO, -OH with Fe/Cu atoms, as well as CC bonds of π-rings on modified structures of graphene. It is noticeable that stronger adsorption is observed in the case of Fe addition (Gr-Fe) compared to Cu (Gr-Cu), enhancing the gas adsorption and sensing performance on graphene. Remarkably, the graphene surfaces supported by Fe and Cu improved selectivity in detecting VOC molecules, particularly C2H5OH and CH3COCH3 for Gr-Fe, and HCHO for Gr-Cu. Quantum chemical analyses reveal that the Fe/Cu⋯O/C contacts are covalent interactions, contributing significantly to the stability of configurations and sensing properties of Fe/Cu-adsorbed graphene. In summary, the observed improvements in selectivity, enhanced adsorption strength, and the identification of crucial interactions at the surface offer valuable insights into designing highly efficient gas sensors and developing advanced sensing materials.
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Affiliation(s)
- Ngoc Tri Nguyen
- Lab of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55113, Binh Dinh, Vietnam.
| | - Dai Q Ho
- Lab of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55113, Binh Dinh, Vietnam.
- Department of Materials Science and Engineering, University of Delaware, Newark 19716, Delaware, USA
| | - Nguyen Tien Trung
- Lab of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55113, Binh Dinh, Vietnam.
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2
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Zhang S, Pang J, Li Y, Ibarlucea B, Liu Y, Wang T, Liu X, Peng S, Gemming T, Cheng Q, Liu H, Yang J, Cuniberti G, Zhou W, Rümmeli MH. An effective formaldehyde gas sensor based on oxygen-rich three-dimensional graphene. NANOTECHNOLOGY 2022; 33:185702. [PMID: 35078155 DOI: 10.1088/1361-6528/ac4eb4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
Three-dimensional (3D) graphene with a high specific surface area and excellent electrical conductivity holds extraordinary potential for molecular gas sensing. Gas molecules adsorbed onto graphene serve as electron donors, leading to an increase in conductivity. However, several challenges remain for 3D graphene-based gas sensors, such as slow response and long recovery time. Therefore, research interest remains in the promotion of the sensitivity of molecular gas detection. In this study, we fabricate oxygen plasma-treated 3D graphene for the high-performance gas sensing of formaldehyde. We synthesize large-area, high-quality, 3D graphene over Ni foam by chemical vapor deposition and obtain freestanding 3D graphene foam after Ni etching. We compare three types of strategies-non-treatment, oxygen plasma, and etching in HNO3solution-for the posttreatment of 3D graphene. Eventually, the strategy for oxygen plasma-treated 3D graphene exceeds expectations, which may highlight the general gas sensing based on chemiresistors.
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Affiliation(s)
- Shu Zhang
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Shandong, Jinan 250022, People's Republic of China
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, Jinan 250022, People's Republic of China
| | - Jinbo Pang
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Shandong, Jinan 250022, People's Republic of China
| | - Yufen Li
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Shandong, Jinan 250022, People's Republic of China
| | - Bergoi Ibarlucea
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden D-01069, Germany
- Center for Advancing Electronics Dresden, Technische Universität Dresden, Dresden D-01069, Germany
| | - Yu Liu
- College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, People's Republic of China
- Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, People's Republic of China
| | - Ting Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, No.3501 Daxue Road, Jinan 250353, People's Republic of China
- School of Bioengineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, People's Republic of China
| | - Xiaoyan Liu
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Shandong, Jinan 250022, People's Republic of China
| | - Songang Peng
- High-Frequency High-Voltage Device and Integrated Circuits R&D Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing, 100029, People's Republic of China
- Key Laboratory of Microelectronic Devices & Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing, 100029, People's Republic of China
| | - Thomas Gemming
- Institute for Complex Materials, Leibniz Institute for Solid State and Materials Research Dresden, PO Box 270116, Dresden, D-01171 Germany
| | - Qilin Cheng
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Shandong, Jinan 250022, People's Republic of China
| | - Hong Liu
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Shandong, Jinan 250022, People's Republic of China
- State Key Laboratory of Crystal Materials, Center of Bio & Micro/Nano Functional Materials, Shandong University, 27 Shandanan Road, Jinan 250100, People's Republic of China
| | - Jiali Yang
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Shandong, Jinan 250022, People's Republic of China
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden D-01069, Germany
- Center for Advancing Electronics Dresden, Technische Universität Dresden, Dresden D-01069, Germany
- Dresden Center for Computational Materials Science, Technische Universität Dresden, Dresden D-01062, Germany
- Dresden Center for Intelligent Materials (GCL DCIM), Technische Universität Dresden, Dresden D-01062, Germany
| | - Weijia Zhou
- Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Shandong, Jinan 250022, People's Republic of China
| | - Mark H Rümmeli
- College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, People's Republic of China
- Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, People's Republic of China
- Institute for Complex Materials, Leibniz Institute for Solid State and Materials Research Dresden, PO Box 270116, Dresden, D-01171 Germany
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie Sklodowskiej 34, Zabrze 41-819, Poland
- Institute of Environmental Technology (CEET), VŠB-Technical University of Ostrava, 17. Listopadu 15, Ostrava 708 33, Czech Republic
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3
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Yin Q, Liu M, Li Y, Li H, Wen Z. Computational study of phosphate adsorption on Mg/Ca modified biochar structure in aqueous solution. CHEMOSPHERE 2021; 269:129374. [PMID: 33385666 DOI: 10.1016/j.chemosphere.2020.129374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/10/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Phosphate removal in water using biochar is widely investigated. Density functional theory was used to study the adsorption of phosphate (H2PO4-) on biochar in water after metal modification. Two types of metals, Mg and Ca, were used to modify the biochar structure, and the edge and metal adsorptions of H2PO4- were investigated on the modified biochar structure. Results were analyzed from the aspects of structural stability, adsorption energy, change in dipole moment, density of electronic states, and atoms in molecules analysis. The overall effect of metal-modified biochar materials on phosphate adsorption was stronger than that of unmodified biochar materials in terms of molecular level. The stability of the metal-modified structure by adding metal was low, and adsorption was prone to occur in this situation. The Ca-modified biochar showed better phosphate adsorption than the Mg-modified structure. Metal adsorption performed better than edge adsorption, proving that the modified metal in the biochar structure played a leading role in H2PO4- adsorption. Metal adsorption was mainly caused by electrostatic attraction, and edge adsorption was mainly caused by covalent bonding.
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Affiliation(s)
- Qianqian Yin
- Department of Power Engineering, North China Electric Power University, Baoding, 071003, PR China.
| | - Mengtian Liu
- Department of Power Engineering, North China Electric Power University, Baoding, 071003, PR China
| | - Yonghua Li
- Department of Power Engineering, North China Electric Power University, Baoding, 071003, PR China
| | - Heping Li
- School of Sciences, Hangzhou Dianzi University, Hangzhou, 310018, PR China
| | - Zhengcheng Wen
- School of Sciences, Hangzhou Dianzi University, Hangzhou, 310018, PR China
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4
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Hassani N. Theoretical investigation of the interaction between the metal phthalocyanine [MPc]a(M = Sc, Ti, and V; a = -1, 0, and +1) complexes and formaldehyde. Turk J Chem 2021; 45:119-131. [PMID: 33679158 PMCID: PMC7925323 DOI: 10.3906/kim-2006-12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 10/23/2020] [Indexed: 11/05/2022] Open
Abstract
Formaldehyde (FA, CH2O) is one of the toxic volatile organic compounds that cause harmful effects on the human body. In this work, the interaction of FA gas with metal phthalocyanine (MPc) molecules was studied by employing density functional theory calculations. A variety of [MPc]a (M = Sc, Ti, and V; a = –1, 0, and +1) complexes were studied, and the electronic properties, interaction energies, and charge transfer properties of all of the studied molecules were systematically discussed. Among the studied complexes, the Sc and Ti phthalocyanines were more reactive toward the adsorption of FA gas. Moreover, it was revealed that the interaction of the [ScPc]+1 and [TiPc]0 complexes with the CH2O molecule was stronger, in which the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy gap of 46% and 36% decreased after FA adsorption. The results indicated that the MPc-based materials may be a promising candidate for the detection of FA gas.
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Affiliation(s)
- Nasim Hassani
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz Iran
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5
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Effect of noble metal atoms on adsorption and electronic properties of graphene toward toxic gas. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2020.113115] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient Conditions. Catalysts 2020. [DOI: 10.3390/catal10091040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Formaldehyde (HCHO) and nitrogen dioxide (NO2) often co-exist in urban environments at levels that are hazardous to health. There is a demand for a solution to the problem of their combined removal. In this paper, we investigate catalysts, adsorbents and composites for their removal efficiency (RE) toward HCHO and NO2, in the context of creating a pollution control device (PCD). Proton-transfer-reaction mass spectrometry and cavity ring-down spectrometry are used to measure HCHO, and chemiluminescence and absorbance-based monitors for NO2. Commercially available and lab-synthesized materials are tested under relevant conditions. None of the commercial adsorbents are effective for HCHO removal, whereas two metal oxide-based catalysts are highly effective, with REs of 81 ± 4% and 82 ± 1%, an improvement on previous materials tested under similar conditions. The best performing material for combined removal is a novel composite consisting of a noble metal catalyst supported on a metal oxide, combined with a treated active carbon adsorbent. The composite is theorized to work synergistically to physisorb and oxidize HCHO and chemisorb NO2. It has an HCHO RE of 72 ± 2% and an NO2 RE of 96 ± 2%. This material has potential as the active component in PCDs used to reduce personal pollution exposure.
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7
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Sun J, Feng S, Wang X, Zhang G, Luo Y, Jiang J. Regulation of Electronic Structure of Graphene Nanoribbon by Tuning Long-Range Dopant-Dopant Coupling at Distance of Tens of Nanometers. J Phys Chem Lett 2020; 11:6907-6913. [PMID: 32787204 DOI: 10.1021/acs.jpclett.0c01839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Long-range dopant-dopant coupling in graphene nanoribbon (GNR) has been under intensive study for a very long time. Using a newly developed dopant central insertion scheme (DCIS), we performed first-principles study on multiple H, O, OH, and FeN4 dopants in long (up to 1000 nm) GNRs and found that, although potential energy of the dopant decays exponentially as a function of distance to the dopant, GNR's electronic density of states (DOS) exhibits wave-like oscillation modulated by dopants separated at a distance up to 100 nm. Such an oscillation strongly infers the purely quantum mechanical resonance states constrained between double quantum wells. This has been unambiguously confirmed by our DCIS study together with a one-dimensional quantum well model study, leading to a proof-of-principle protocol prescribing on-demand GNR-DOS regulation. All these not only reveal the underlining mechanism and importance of long-range dopant-dopant coupling specifically reported in GNR, but also open a novel highway for rationally optimizing and designing two-dimensional materials.
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Affiliation(s)
- Jiace Sun
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Shuo Feng
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xijun Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Guozhen Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Yi Luo
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jun Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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8
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Liu X, Chen Y, Zhang M, Zhang C. Adsorption properties of formaldehyde on β12-borophene surfaces: A first-principles study. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2019.137035] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Ketrat S, Maihom T, Treesukul P, Boekfa B, Limtrakul J. Theoretical study of methane adsorption and C─H bond activation over Fe-embedded graphene: Effect of external electric field. J Comput Chem 2019; 40:2819-2826. [PMID: 31471930 DOI: 10.1002/jcc.26058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/02/2019] [Accepted: 08/14/2019] [Indexed: 11/07/2022]
Abstract
The effect of an external electric field (EF) on the methane adsorption and its activation on iron-embedded graphene (Fe-GPs) are investigated by using the M06-L density functional method. The EF is applied in the perpendicular direction to the graphene in the range of -0.015 to +0.015 a.u. with the interval of 0.005 a.u. The effects of EF on the adsorption, transition state and product complexes of the methane activation reaction are revealed. The binding energies of methane on Fe site in Fe-GPs are increased from -12.9 to -15.3, -18.1 and -21.5 kcal/mol for the negative EF of -0.005, -0.010 and -0.015, respectively. By applying positive EF, the activation barriers for methane activation are reduced in range of 3-8 kcal/mol (around 12-31%) and the reaction energies are more exothermic. The positive EF kinetically favors the reaction compared to the system without EF. The adsorption and activation of methane on Fe-GPs can be easily tuned by adjusting the external electric field for various applications. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Sombat Ketrat
- School of Information Science and Technology (IST), Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Thana Maihom
- Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140, Thailand.,Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21201, Thailand
| | - Piti Treesukul
- Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140, Thailand
| | - Bundet Boekfa
- Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140, Thailand
| | - Jumras Limtrakul
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21201, Thailand
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10
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Afshari T, Mohsennia M. Structural and electronic properties of adsorbed nucleobases on pristine and Al-doped coronene in absence and presence of external electric fields: a computational study. Struct Chem 2019. [DOI: 10.1007/s11224-019-01455-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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11
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Cortes-Arriagada D, Mella A. Performance of doped graphene nanoadsorbents with first-row transition metals (Sc Zn) for the adsorption of water-soluble trivalent arsenicals: A DFT study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111665] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Tran NTT, Nguyen DK, Lin S, Gumbs G, Lin M. Fundamental Properties of Transition‐Metals‐Adsorbed Graphene. Chemphyschem 2019; 20:2473-2481. [DOI: 10.1002/cphc.201900614] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 07/14/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Ngoc Thanh Thuy Tran
- Division of Computational Physics, Institute for Computational Science Ton Duc Thang University Ho Chi Minh City Vietnam
- Faculty of Electrical & Electronics Engineering Ton Duc Thang University Ho Chi Minh City Vietnam
| | - Duy Khanh Nguyen
- Laboratory of Applied Physics, Advanced Institute of Materials Science Ton Duc Thang University Ho Chi Minh City Vietnam
- Faculty of Applied Sciences Ton Duc Thang University Ho Chi Minh City Vietnam
| | - Shih‐Yang Lin
- Department of Physics National Chung Cheng University Chiayi Taiwan
| | - Godfrey Gumbs
- Department of Physics and Astronomy Hunter College of the City University of New York New York USA
| | - Ming‐Fa Lin
- Hierachical Green-Energy Materials (Hi-GEM) Research Center National Cheng Kung University Tainan 70101 Taiwan
- Quantum Topological Center National Cheng Kung University Tainan 701 Taiwan
- Department of Physics National Cheng Kung University Tainan 701 Taiwan
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13
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Su Y, Li W, Li G, Ao Z, An T. Density functional theory investigation of the enhanced adsorption mechanism and potential catalytic activity for formaldehyde degradation on Al-decorated C2N monolayer. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(18)63201-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Mandeep, Sharma L, Kakkar R. Adsorption of Bromonitromethane over Graphene‐Based Substrates: A Density Functional Theory Analysis. ChemistrySelect 2019. [DOI: 10.1002/slct.201900082] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mandeep
- Computational Chemistry LaboratoryDepartment of ChemistryUniversity of Delhi Delhi- 110007 India
| | - Lekha Sharma
- Computational Chemistry LaboratoryDepartment of ChemistryUniversity of Delhi Delhi- 110007 India
| | - Rita Kakkar
- Computational Chemistry LaboratoryDepartment of ChemistryUniversity of Delhi Delhi- 110007 India
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15
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DFT investigation of metal doped graphene capacity for adsorbing of ozone, nitrogen dioxide and sulfur dioxide molecules. ADSORPTION 2019. [DOI: 10.1007/s10450-019-00080-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Qu G, Fan G, Zhou M, Rong X, Li T, Zhang R, Sun J, Chen D. Graphene-Modified ZnO Nanostructures for Low-Temperature NO 2 Sensing. ACS OMEGA 2019; 4:4221-4232. [PMID: 31459630 PMCID: PMC6647949 DOI: 10.1021/acsomega.8b03624] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 02/13/2019] [Indexed: 05/19/2023]
Abstract
This paper develops a novel ultrasonic spray-assisted solvothermal (USS) method to synthesize wrapped ZnO/reduced graphene oxide (rGO) nanocomposites with a Schottky junction for gas-sensing applications. The as-obtained ZnO/rGO-x samples with different graphene oxide (GO) contents (x = 0-1.5 wt %) are characterized by various techniques, and their gas-sensing properties for NO2 and other VOC gases are also evaluated. The results show that the USS-derived ZnO/rGO samples exhibit high NO2-sensing property at low operating temperatures (e.g., 70-130 °C) because of their high specific surface area and porous structures when compared with the ZnO/rGO sample obtained by the traditional precipitation method. The content of rGO shows an obvious effect on their NO2-sensing properties, and the ZnO/rGO-0.5 sample has a high response of 62 operating at 130 °C, three times that of pure ZnO. The detection limit of the ZnO/rGO-0.5 sensor to NO2 is as low as 10 ppb under the present test condition. In addition, the ZnO/rGO-0.5 sensor shows a highly selective response to NO2 gas when compared with organic vapors and other inflammable or toxic gases. The theoretical and experimental analyses indicate that the enhancement in NO2-sensing performance of the ZnO/rGO sensor is attributed to the formation of wrapped ZnO/rGO Schottky junctions.
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Affiliation(s)
- Geping Qu
- School of Materials
Science and Engineering, Zhengzhou University, Zhengzhou 450001, P.R. China
| | - Guijun Fan
- School of Materials
Science and Engineering, Zhengzhou University, Zhengzhou 450001, P.R. China
| | - Moyan Zhou
- School of Materials
Science and Engineering, Zhengzhou University, Zhengzhou 450001, P.R. China
| | - Xiaoru Rong
- School of Materials
Science and Engineering, Zhengzhou University, Zhengzhou 450001, P.R. China
| | - Tao Li
- School of Chemical Engineering and Energy
Technology & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, P.R. China
| | - Rui Zhang
- Laboratory of Aeronautical Composites, Zhengzhou Institute of Aeronautical Industry Management, Zhengzhou 450046, China
| | - Jing Sun
- The State Key Laboratory of High Performance
Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P.R. China
- E-mail: (J.S.)
| | - Deliang Chen
- School of Materials
Science and Engineering, Zhengzhou University, Zhengzhou 450001, P.R. China
- School of Chemical Engineering and Energy
Technology & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, P.R. China
- E-mail: , (D.C.)
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17
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Kinetic stability of imidazolium cations and ionic liquids: A frontier molecular orbital approach. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Li H, Wang C, Xun S, He J, Jiang W, Zhang M, Zhu W, Li H. An accurate empirical method to predict the adsorption strength for π-orbital contained molecules on two dimensional materials. J Mol Graph Model 2018; 82:93-100. [DOI: 10.1016/j.jmgm.2018.04.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 04/16/2018] [Accepted: 04/17/2018] [Indexed: 10/17/2022]
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