1
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Ntola P, Friedrich HB, Singh S, Olivier EJ, Farahani M, Mahomed AS. Effect of the fuel on the surface VOx concentration, speciation and physico-chemical characteristics of solution combustion synthesised VOx/MgO catalysts for n-octane activation. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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2
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Nguyen-Phu H, Kim T, Kim Y, Kang KH, Cho H, Kim J, Ro I. Role of phase in NiMgAl mixed oxide catalysts for CO2 dry methane reforming (DRM). Catal Today 2022. [DOI: 10.1016/j.cattod.2022.08.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Everett Espino OE, Zonetti PC, Celin RR, Costa LT, Alves OC, Spadotto JC, Appel LG, de Avillez RR. The tendency of supports to generate oxygen vacancies and the catalytic performance of Ni/ZrO2 and Ni/Mg(Al)O in CO2 methanation. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01915e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
CO2 methanation – TPSR profiles of the Ni/ZrO2, Ni/Mg(Al)O, and Ni/SiO2 catalysts.
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Affiliation(s)
- O. E. Everett Espino
- Departamento de Engenharia Química e de Materiais, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente, 225, Gávea, 22451-900, Rio de Janeiro, RJ, Brazil
- Divisão de Catálise, Biocatálise e Processos Químicos, Instituto Nacional de Tecnologia, Av Venezuela 82, sala 518, Praça Mauá, 20081-312, Rio de Janeiro, RJ, Brazil
| | - P. C. Zonetti
- Divisão de Catálise, Biocatálise e Processos Químicos, Instituto Nacional de Tecnologia, Av Venezuela 82, sala 518, Praça Mauá, 20081-312, Rio de Janeiro, RJ, Brazil
| | - R. R. Celin
- Instituto de Química, Universidade Federal Fluminense, Campos de Valonginho s/n, Centro, 24020-141, Niterói, RJ, Brazil
| | - L. T. Costa
- Instituto de Química, Universidade Federal Fluminense, Campos de Valonginho s/n, Centro, 24020-141, Niterói, RJ, Brazil
| | - O. C. Alves
- Instituto de Química, Universidade Federal Fluminense, Campos de Valonginho s/n, Centro, 24020-141, Niterói, RJ, Brazil
| | - J. C. Spadotto
- Departamento de Engenharia Química e de Materiais, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente, 225, Gávea, 22451-900, Rio de Janeiro, RJ, Brazil
| | - L. G. Appel
- Divisão de Catálise, Biocatálise e Processos Químicos, Instituto Nacional de Tecnologia, Av Venezuela 82, sala 518, Praça Mauá, 20081-312, Rio de Janeiro, RJ, Brazil
| | - R. R. de Avillez
- Departamento de Engenharia Química e de Materiais, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente, 225, Gávea, 22451-900, Rio de Janeiro, RJ, Brazil
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4
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Li X, Zhao J, Fan W, Wang Y, Tang X, Zhu Y. Oxygen‐Vacancy‐Mediated ROS Generation Mechanism of MgO Nanoparticles against
Escherichia coli. ChemistrySelect 2021. [DOI: 10.1002/slct.202103450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaoyi Li
- Dalian Maritime University Collaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Jiao Zhao
- Dalian Maritime University Collaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Wei Fan
- Dalian Maritime University Collaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Yin Wang
- Dalian Maritime University Collaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Xiaojia Tang
- Dalian Maritime University Collaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Yimin Zhu
- Dalian Maritime University Collaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
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5
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Rekhtina M, Dal Pozzo A, Stoian D, Armutlulu A, Donat F, Blanco MV, Wang ZJ, Willinger MG, Fedorov A, Abdala PM, Müller CR. Effect of molten sodium nitrate on the decomposition pathways of hydrated magnesium hydroxycarbonate to magnesium oxide probed by in situ total scattering. NANOSCALE 2020; 12:16462-16473. [PMID: 32478776 DOI: 10.1039/d0nr01760d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The effect of NaNO3 and its physical state on the thermal decomposition pathways of hydrated magnesium hydroxycarbonate (hydromagnesite, HM) towards MgO was examined by in situ total scattering. Pair distribution function (PDF) analysis of these data allowed us to probe the structural evolution of pristine and NaNO3-promoted HM. A multivariate curve resolution alternating least squares (MCR-ALS) analysis identified the intermediate phases and their evolution upon the decomposition of both precursors to MgO. The total scattering results are discussed in relation with thermogravimetric measurements coupled with off-gas analysis. MgO is obtained from pristine HM (N2, 10 °C min-1) through an amorphous magnesium carbonate intermediate (AMC), formed after the partial removal of water of crystallization from HM. The decomposition continues via a gradual release of water (due to dehydration and dehydroxylation) and, in the last step, via decarbonation, leading to crystalline MgO. The presence of molten NaNO3 alters the decomposition pathways of HM, proceeding now through AMC and crystalline MgCO3. These results demonstrate that molten NaNO3 facilitates the release of water (from both water of crystallization and through dehydroxylation) and decarbonation, and promotes the crystallization of MgCO3 and MgO in comparison to pristine HM. MgO formed from the pristine HM precursor shows a smaller average crystallite size than NaNO3-promoted HM and preserves the initial nano-plate-like morphology of HM. NaNO3-promoted HM was decomposed to MgO that is characterized by a larger average crystallite size and irregular morphology. Additionally, in situ SEM allowed visualization of the morphological evolution of HM promoted with NaNO3 at a micrometre scale.
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Affiliation(s)
- Margarita Rekhtina
- Laboratory of Energy Science and Engineering, Department of Mechanical and Process Engineering, ETH Zürich, Leonhardstrasse 21, 8092 Zürich, Switzerland.
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6
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Li X, Zhao J, Hong X, Yang Y, Tang X, Zhu Y, Li T. Calcination‐Dependent Surface Defect Variation and Antibacterial Activity of Magnesium Oxide Nanoplates. ChemistrySelect 2020. [DOI: 10.1002/slct.201904853] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaoyi Li
- Dalian Maritime UniversityCollaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Jiao Zhao
- Dalian Maritime UniversityCollaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Xiaoyu Hong
- Dalian Maritime UniversityCollaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Yan Yang
- Dalian Maritime UniversityCollaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Xiaojia Tang
- Dalian Maritime UniversityCollaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Yimin Zhu
- Dalian Maritime UniversityCollaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
| | - Tie Li
- Dalian Maritime UniversityCollaborative Innovation Center for Vessel Pollution Monitoring and Control 116026 Dalian China
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7
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Chagas LH, Zonetti PC, Matheus CRV, Rabello CRK, Alves OC, Appel LG. The Role of the Oxygen Vacancies in the Synthesis of 1, 3‐Butadiene from Ethanol. ChemCatChem 2019. [DOI: 10.1002/cctc.201901243] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Luciano H. Chagas
- Instituto Nacional de TecnologiaDivisão de Catálise e Processos Químicos Av Venezuela 82, sala 518, Saúde Rio de Janeiro, RJ 20081-312 Brazil
| | - Priscila C. Zonetti
- Instituto Nacional de TecnologiaDivisão de Catálise e Processos Químicos Av Venezuela 82, sala 518, Saúde Rio de Janeiro, RJ 20081-312 Brazil
| | - Caio R. V. Matheus
- Instituto Nacional de TecnologiaDivisão de Catálise e Processos Químicos Av Venezuela 82, sala 518, Saúde Rio de Janeiro, RJ 20081-312 Brazil
- Escola de Química, Centro de TecnologiaUniversidade Federal do Rio de Janeiro (UFRJ) Av. Athos da Silveira Ramos 149 Bloco E, sala 201 Cidade Universitária, Ilha do Fundão Rio de Janeiro, RJ 21941-972 Brazil
| | - Carlos R. K. Rabello
- Cidade UniversitáriaPETROBRAS-CENPES Av. Horácio Macedo 950, Ilha do Fundão Rio de Janeiro, RJ 21941-915 Brazil
| | - Odivaldo C. Alves
- Instituto de QuímicaUniversidade Federal Fluminense (UFF) Campus Valonguinho, R. São João Batista 2-188, Centro Niterói, RJ 24020-007 Brazil
| | - Lucia G. Appel
- Instituto Nacional de TecnologiaDivisão de Catálise e Processos Químicos Av Venezuela 82, sala 518, Saúde Rio de Janeiro, RJ 20081-312 Brazil
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Nayak S, Pradhan AC, Parida KM. Topotactic Transformation of Solvated MgCr-LDH Nanosheets to Highly Efficient Porous MgO/MgCr 2O 4 Nanocomposite for Photocatalytic H 2 Evolution. Inorg Chem 2018; 57:8646-8661. [PMID: 29949363 DOI: 10.1021/acs.inorgchem.8b01517] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The hybrid structure of nanoparticles (NPs) with nanosheets has the advantage of both anisotropic properties of NPs and large specific surface areas of nanosheets, which is desirable for many technological applications. In this study, MgCr2O4 spinel NPs decorated on highly porous MgO nanosheets forming MgO/MgCr2 O4( x) nanocomposites were synthesized by a one pot coprecipitation method followed by a heat treatment process of the solvated wet gel of MgCr-LDH with polar solvent N, N-dimethylformamide (DMF) at 400 °C. This novel synthetic methodology generates materials consisting of porous metal oxides nanosheets adhered with spinel phase NPs due to the slow generation of gases such as H2O, CO2, and NH3 under moderate temperature during the heat treatment process. The synergistic effect of much wider band gap MgO nanosheets and narrow band gap MgCr2O4 NPs added increased stability due to the stronger bonding coordination of MgCr2O4 NPs with MgO nanosheets. The obtained MgO/MgCr2 O4( x) nanocomposites possess large specific surface areas, highly porous structure, and excellent interface between MgCr2O4 NPs and MgO nanosheets, which proved from N2 sorption isotherm, TEM, HR-TEM study. With metallic ratio of MgCr3:1, MgO/MgCr2O4(MgCr3:1) nanocomposites exhibit highest H2 evolution rate of 840 μmolg-12h-1, which was 2 times higher than that of pure MgCr2O4(420 μmolg-12h-1). The LSV measurement study of MgO/MgCr2O4 (MgCr3:1) nanocomposite shows an enhancement of light current density of 0.22 μA/cm2 at potential bias of -1.1 V. The Mott-Schottky analysis suggested the band edge positions of the n-type constituents and formation of n-n type heterojunctions in MgO/MgCr2O4 (MgCr3:1) nanocomposite, which facilitates the flow of charge carriers. The EIS and Bode phase plot of MgO/MgCr2O4 (MgCr3:1) nanocomposite signifies the lower interfacial charge transfer resistance and higher lifetime of electrons (2.7 ms) for enhanced H2 production. Lastly, the enhanced photocatalytic H2 production activity and long-term stability of MgO/MgCr2O4(MgCr3:1) could be attributed to maximum specific surface area, porous structure, close intimacy contact angle between two cubic phases of MgCr2O4 NPs and MgO nanosheets, abundant oxygen vacancies sites, reduced charge transfer resistance and suitable band edge potential to drive the thermodynamic energy for H2 production. This work highlighted an effective strategy for the synthesis of cost-effective 2D porous heterojunctions nanocomposite photocatalyst for promising applications in the field of clean H2 production utilizing abundant solar energy.
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Affiliation(s)
- Susanginee Nayak
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research , Siksha 'O' Anusandhan Deemed to be University , Bhubaneswar - 751030 , Odisha , India
| | - Amaresh C Pradhan
- UNAM-National Nanotechnology Research Center , Bilkent University , Ankara 06800 , Turkey
| | - K M Parida
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research , Siksha 'O' Anusandhan Deemed to be University , Bhubaneswar - 751030 , Odisha , India
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9
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Liu Y, Xia C, Wang Q, Zhang L, Huang A, Ke M, Song Z. Direct dehydrogenation of isobutane to isobutene over Zn-doped ZrO2 metal oxide heterogeneous catalysts. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01420e] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of unconventional nano-sized Zn-doped ZnZrO-x catalysts are applied for the first time to the direct dehydrogenation of isobutane to isobutene.
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- PR China
| | - Chengjie Xia
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- PR China
| | - Qi Wang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- PR China
| | - Lei Zhang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- PR China
| | - Ao Huang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- PR China
| | - Ming Ke
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- PR China
| | - Zhaozheng Song
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- PR China
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10
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Pradeep EKC, Ohtani M, Kawaharamura T, Kobiro K. Single-step Simple Solvothermal Synthetic Approach to Ultrafine MgO Nanocrystals Using High-temperature and High-pressure Acetonitrile. CHEM LETT 2017. [DOI: 10.1246/cl.170185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ellawala K. C. Pradeep
- Center for Nanotechnology, Research Institute, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
| | - Masataka Ohtani
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
- Laboratory for Structural Nanochemistry, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
| | - Toshiyuki Kawaharamura
- Center for Nanotechnology, Research Institute, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
| | - Kazuya Kobiro
- Center for Nanotechnology, Research Institute, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
- Laboratory for Structural Nanochemistry, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
- Research Center for Material Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502
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11
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The ZnxZr1−xO2−y solid solution on m-ZrO2: Creating O vacancies and improving the m-ZrO2 redox properties. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.10.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Ma Q, Kato K. Crystallographic fusion behavior and interface evolution of mono-layer BaTiO3nanocube arrangement. CrystEngComm 2016. [DOI: 10.1039/c5ce02235e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An abnormal sintering behavior between BaTiO3nanocubes with variable sintering temperature and geometry was investigated by high resolution transmission electron microscopy.
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Affiliation(s)
- Qiang Ma
- National Institute of Advanced Industrial Science and Technology (AIST)
- Nagoya, Japan
| | - Kazumi Kato
- National Institute of Advanced Industrial Science and Technology (AIST)
- Nagoya, Japan
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13
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Jadhav AH, Lim AC, Thorat GM, Jadhav HS, Seo JG. Green solvent ionic liquids: structural directing pioneers for microwave-assisted synthesis of controlled MgO nanostructures. RSC Adv 2016. [DOI: 10.1039/c6ra02980a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Various MgO nanostructures were obtained via one-pot microwave-assisted synthesis in various structural directing ionic liquids.
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Affiliation(s)
- Arvind H. Jadhav
- Department of Energy Science and Technology
- Energy and Environment Fusion Technology Center
- Myongji University
- Yongin-si
- Republic of Korea
| | - Alan C. Lim
- Department of Energy Science and Technology
- Energy and Environment Fusion Technology Center
- Myongji University
- Yongin-si
- Republic of Korea
| | - Gaurav M. Thorat
- Department of Energy Science and Technology
- Energy and Environment Fusion Technology Center
- Myongji University
- Yongin-si
- Republic of Korea
| | - Harsharaj S. Jadhav
- Department of Energy Science and Technology
- Energy and Environment Fusion Technology Center
- Myongji University
- Yongin-si
- Republic of Korea
| | - Jeong Gil Seo
- Department of Energy Science and Technology
- Energy and Environment Fusion Technology Center
- Myongji University
- Yongin-si
- Republic of Korea
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14
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Salem JK, El-Nahhal IM, Hammad TM, Kuhn S, Sharekh SA, El-Askalani M, Hempelmann R. Optical and fluorescence properties of MgO nanoparticles in micellar solution of hydroxyethyl laurdimonium chloride. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.07.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Gagin A, Levin I. A Bayesian approach to removal of incoherent scattering from neutron total-scattering data. J Appl Crystallogr 2014. [DOI: 10.1107/s1600576714023796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
A Bayesian statistics approach for subtraction of incoherent scattering from neutron total-scattering data has been developed and implemented in a public domain software package. In this approach, the estimated background signal associated with incoherent scattering maximizes the posterior probability, which combines the likelihood of this signal in reciprocal and real spaces with the prior that favors smooth lines. The probability distributions are constructed according to the principle of maximum entropy. The method enables robust subtraction of incoherent-scattering backgrounds while providing estimated uncertainties for recovered signals. The developed procedure was first tested using simulated data and then demonstrated using three representative experimental data sets, collected on bulk materials and nanoparticles, featuring distinct ratios of coherent to incoherent scattering.
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Xie S, Bao S, Ouyang J, Zhou X, Kuang Q, Xie Z, Zheng L. Organic-Inorganic Interface-Induced Multi-Fluorescence of MgO Nanocrystal Clusters and Their Applications in Cellular Imaging. Chemistry 2014; 20:5244-52. [DOI: 10.1002/chem.201303927] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Indexed: 12/12/2022]
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Krishnamoorthy K, Moon JY, Hyun HB, Cho SK, Kim SJ. Mechanistic investigation on the toxicity of MgO nanoparticles toward cancer cells. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm35087d] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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