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Pereiro FA, Galley SS, Jackson JA, Shafer JC. Contemporary Assessment of Energy Degeneracy in Orbital Mixing with Tetravalent f-Block Compounds. Inorg Chem 2024; 63:9687-9700. [PMID: 38743642 DOI: 10.1021/acs.inorgchem.3c03828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
The f block is a comparatively understudied group of elements that find applications in many areas. Continued development of technologies involving the lanthanides (Ln) and actinides (An) requires a better fundamental understanding of their chemistry. Specifically, characterizing the electronic structure of the f elements presents a significant challenge due to the spatially core-like but energetically valence-like nature of the f orbitals. This duality led f-block scientists to hypothesize for decades that f-block chemistry is dominated by ionic metal-ligand interactions with little covalency because canonical covalent interactions require both spatial orbital overlap and orbital energy degeneracy. Recent studies on An compounds have suggested that An ions can engage in appreciable orbital mixing between An 5f and ligand orbitals, which was attributed to "energy-degeneracy-driven covalency". This model of bonding has since been a topic of debate because different computational methods have yielded results that support and refute the energy-degeneracy-driven covalency model. In this Viewpoint, literatures concerning the metal- and ligand-edge X-ray absorption near-edge structure (XANES) of five tetravalent f-block systems─MO2 (M = Ln, An), LnF4, MCl62-, and [Ln(NP(pip)3)4]─are compiled and discussed to explore metal-ligand bonding in f-block compounds through experimental metrics. Based on spectral assignments from a variety of theoretical models, covalency is seen to decrease from CeO2 and PrO2 to TbO2 through weaker ligand-to-metal charge-transfer (LMCT) interactions, while these LMCT interactions are not observed in the trivalent Ln sesquixodes until Yb. In comparison, while XANES characterization of AnO2 compounds is scarce, computational modeling of available X-ray absorption spectra suggests that covalency among AnO2 reaches a maximum between Am and Cm. Moreover, a decrease in covalency is observed upon changing ligands while maintaining an isostructural coordination environment from CeO2 to CeF4. These results could allude to the importance of orbital energy degeneracy in f-block bonding, but there are a variety of data gaps and conflicting results from different modeling techniques that need to be addressed before broad conclusions can be drawn.
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Affiliation(s)
- Felipe A Pereiro
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Shane S Galley
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Jessica A Jackson
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Jenifer C Shafer
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, United States
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2
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Ceballos-Sanchez O, Navarro-López DE, Mejía-Méndez JL, Sanchez-Ante G, Rodríguez-González V, Sánchez-López AL, Sanchez-Martinez A, Duron-Torres SM, Juarez-Moreno K, Tiwari N, López-Mena ER. Enhancing antioxidant properties of CeO 2 nanoparticles with Nd 3+ doping: structural, biological, and machine learning insights. Biomater Sci 2024; 12:2108-2120. [PMID: 38450552 DOI: 10.1039/d3bm02107f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
The antioxidant capabilities of nanoparticles are contingent upon various factors, including their shape, size, and chemical composition. Herein, novel Nd-doped CeO2 nanoparticles were synthesized and the neodymium content was varied to investigate the synergistic impact on the antioxidant properties of CeO2 nanoparticles. Incorporating Nd3+ induced changes in lattice parameters and significantly altered the morphology from nanoparticles to nanorods. The biological activity of Nd-doped CeO2 was examined against pathogenic bacterial strains, breast cancer cell lines, and antioxidant models. The antibacterial and anticancer activities of nanoparticles were not observed, which could be associated with the Ce3+/Ce4+ ratio. Notably, the incorporation of neodymium improved the antioxidant capacity of CeO2. Machine learning techniques were employed to forecast the antioxidant activity to enhance understanding and predictive capabilities. Among these models, the random forest model exhibited the highest accuracy at 96.35%, establishing it as a robust computational tool for elucidating the biological behavior of Nd-doped CeO2 nanoparticles. This study presents the first exploration of the influence of Nd3+ on the structural, optical, and biological attributes of CeO2, contributing valuable insights and extending the application of machine learning in predicting the therapeutic efficacy of inorganic nanomaterials.
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Affiliation(s)
- Oscar Ceballos-Sanchez
- Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias (CUCEI), Departamento de Ingenieria de Proyectos, Av. José Guadalupe Zuno # 48, Industrial Los Belenes, Zapopan, Jalisco, 45157, Mexico.
| | - Diego E Navarro-López
- Tecnologico de Monterrey, Escuela de ingeniería y Ciencias, Av. Gral. Ramón Corona No 2514, Colonia Nuevo México, Zapopan, Jalisco, 45121, Mexico
| | - Jorge L Mejía-Méndez
- Departamento de Ciencias Químico-Biológicas, Universidad de las Américas Puebla, Santa Catarina Mártir s/n, 72810 Cholula, Puebla, Mexico
| | - Gildardo Sanchez-Ante
- Tecnologico de Monterrey, Escuela de ingeniería y Ciencias, Av. Gral. Ramón Corona No 2514, Colonia Nuevo México, Zapopan, Jalisco, 45121, Mexico
| | - Vicente Rodríguez-González
- División de Materiales Avanzados, IPICYT, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí, S.L.P., Mexico
| | - Angélica Lizeth Sánchez-López
- Tecnologico de Monterrey, Escuela de ingeniería y Ciencias, Av. Gral. Ramón Corona No 2514, Colonia Nuevo México, Zapopan, Jalisco, 45121, Mexico
| | - Araceli Sanchez-Martinez
- Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias (CUCEI), Departamento de Ingenieria de Proyectos, Av. José Guadalupe Zuno # 48, Industrial Los Belenes, Zapopan, Jalisco, 45157, Mexico.
| | - Sergio M Duron-Torres
- Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, Campus Siglo XXI, Carretera Zacatecas, Guadalajara Km 6, Ejido La Escondida, 98160, Zacatecas, Mexico
| | - Karla Juarez-Moreno
- Centro de Física Aplicada y Tecnología Avanzada (CFATA), Universidad Nacional Autónoma de México (UNAM), Querétaro, QRO 76230, Mexico
| | - Naveen Tiwari
- Centro Singular de Investigación en Química Biológica y Materiales Moleculares (CIQUS), C/Jenaro de la Fuente s/n, Campus Vida, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Edgar R López-Mena
- Tecnologico de Monterrey, Escuela de ingeniería y Ciencias, Av. Gral. Ramón Corona No 2514, Colonia Nuevo México, Zapopan, Jalisco, 45121, Mexico
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3
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Costantini JM, Ribis J. Analysis of Plasmon Loss Peaks of Oxides and Semiconductors with the Energy Loss Function. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7610. [PMID: 38138750 PMCID: PMC10744408 DOI: 10.3390/ma16247610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/23/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023]
Abstract
This paper highlights the use and applications of the energy loss function (ELF) for materials analysis by using electron energy loss spectroscopy (EELS). The basic Drude-Lindhart theory of the ELF is briefly presented along with reference to reflection electron energy loss (REELS) data for several dielectric materials such as insulating high-k binary oxides and semiconductors. Those data and their use are critically discussed. A comparison is made to the available ab initio calculations of the ELF for these materials. Experimental, high-resolution TEM-EELS data on Si, SiC, and CeO2 obtained using a high-resolution, double-Cs-corrected transmission electron microscope are confronted to calculated spectra on the basis of the ELF theory. Values of plasmon energies of these three dielectric materials are quantitatively analyzed on the basis of the simple Drude's free electron theory. The effects of heavy ion irradiation on the TEM-EELS spectra of Si and SiC are addressed. In particular, the downward shifts of plasmon peaks induced by radiation damage and the subsequent amorphization of Si and SiC are discussed. TEM-EELS data of CeO2 are also analyzed with respect to the ELF data and with comparison to isostructural ZrO2 and PuO2 by using the same background and with reference to ab initio calculations.
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Affiliation(s)
- Jean-Marc Costantini
- Service de Recherche en Matériaux et Procédés Avancés, Université Paris-Saclay, CEA, 91191 Gif-sur-Yvette, France;
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Ben Yaacov A, Falling LJ, Ben David R, Attia S, Andrés MA, Nemšák S, Eren B. Oxidation and Reduction of Polycrystalline Cerium Oxide Thin Films in Hydrogen. J Phys Chem Lett 2023; 14:7354-7360. [PMID: 37561999 PMCID: PMC10461297 DOI: 10.1021/acs.jpclett.3c01662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 08/04/2023] [Indexed: 08/12/2023]
Abstract
This study investigates the oxidation state of ceria thin films' surface and subsurface under 100 mTorr hydrogen using ambient pressure X-ray photoelectron spectroscopy. We examine the influence of the initial oxidation state and sample temperature (25-450 °C) on the interaction with hydrogen. Our findings reveal that the oxidation state during hydrogen interaction involves a complex interplay between oxidizing hydride formation, reducing thermal reduction, and reducing formation of hydroxyls followed by water desorption. In all studied conditions, the subsurface exhibits a higher degree of oxidation compared to the surface, with a more subtle difference for the reduced sample. The reduced samples are significantly hydroxylated and covered with molecular water at 25 °C. We also investigate the impact of water vapor impurities in hydrogen. We find that although 1 × 10-6 Torr water vapor oxidizes ceria, it is probably not the primary driver behind the oxidation of reduced ceria in the presence of hydrogen.
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Affiliation(s)
- Adva Ben Yaacov
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, 76100 Rehovot, Israel
| | - Lorenz J. Falling
- Advanced
Light Source, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Materials
Science Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Roey Ben David
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, 76100 Rehovot, Israel
| | - Smadar Attia
- Nuclear
Research Centre—Negev, Beer-Sheva 84190, Israel
| | - Miguel A. Andrés
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, 76100 Rehovot, Israel
| | - Slavomír Nemšák
- Advanced
Light Source, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Department
of Physics and Astronomy, University of
California, Davis, California 95616, United States
| | - Baran Eren
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 234 Herzl Street, 76100 Rehovot, Israel
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5
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Donphai W, Thepphankulngarm N, Chaisuwan T, Tanangteerapong D, Rood SC, Kongkachuichay P. Catalytic Performance of Copper and Ruthenium Loaded on N-Doped Modified PBZ-Derived Carbons for CO2 Hydrogenation. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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6
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Somov NV, Chausov FF, Kazantseva IS, Vorob'yov VL, Anatol'evna Shumilova M, Maratkanova AN. Cerium(III) chelate complex with monoprotonated nitrilo-tris(methylenephosphonic) acid: structure and chemical bonding. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133935] [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]
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7
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Kang E, Choi J, Choi H, Yun J, Lee JH, Yoo M, Kim C, Lee HM, Kim HY. Gold single-atoms confined at the CeO x-TiO 2interfaces with enhanced low-temperature activity toward CO oxidation. NANOTECHNOLOGY 2022; 34:045703. [PMID: 36260974 DOI: 10.1088/1361-6528/ac9b61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
We use CeOx-TiO2hetero-interfaces generated on the surface of CeOx-TiO2hybrid oxide supporting powders to stabilize Au single-atoms (SAs) with excellent low-temperature activity toward CO oxidation. Based on intriguing density functional theory calculation results on the preferential formation of Au-SAs at the CeOx-TiO2interfaces and the high activity of Au-SAs toward the Mars-van Krevelen type CO oxidation, we synthesized a Au/CeOx-TiO2(ACT) catalyst with 0.05 wt.% of Au content. The Au-SAs stabilized at the CeOx-TiO2interfaces by electronic coupling between Au and Ce showed improved low-temperature CO oxidation activity than the conventional Au/TiO2control group catalyst. However, the light-off profile of ACT showed that the early activated Au-SAs are not vigorously participating in CO oxidation. The large portion of the positive effect on the overall catalytic activity from the low activation energy barrier of ACT was retarded by the negative impact from the decreasing active site density at high temperatures. We anticipate that the low-temperature activity and high-temperature stability of Au-SAs that stand against each other can be optimized by controlling the electronic coupling strength between Au-SAs and oxide clusters at the Au-oxide-TiO2interfaces. Our results show that atomic-precision interface modulation could fine-tune the catalytic activity and stability of Au-SAs.
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Affiliation(s)
- Eunji Kang
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Jungwoo Choi
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hyuk Choi
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Jieun Yun
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Ju Hyeok Lee
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Mi Yoo
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Chunjoong Kim
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Hyuck Mo Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hyun You Kim
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
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8
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Teterin YA, Perfil’ev YD, Maslakov KI, Yarzhemskii VG, Teterin AY, Ivanov KE, Dedushenko SK. STRUCTURE OF XPS SPECTRA OF K2FeO4. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622100110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Cardenas L, Molinet-Chinaglia C, Loridant S. Unraveling Ce 3+ detection at the surface of ceria nanopowders by UPS analysis. Phys Chem Chem Phys 2022; 24:22815-22822. [PMID: 36112061 DOI: 10.1039/d2cp02736d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sequential analysis using Ultra-violet Photoelectron Spectroscopy (UPS) and X-ray Photoelectron Spectroscopy (XPS) on ceria nanopowders has been implemented to identify the influence of the X-ray beam on the surface of this oxide. For the first time, UPS analysis evidenced the photoreductive effect of XPS analysis on ceria after an oxidative in situ pretreatment, leading to an overestimation of the Ce3+/Ce4+ ratio obtained by XPS. Based on this spectroscopy methodology, UPS imposes itself as a leading technique for analyzing powders with minimal impact on the authentic chemical state, thus paving the way for identifying the real ratio of Ce4+ and Ce3+ of ceria after oxidative and reductive in situ treatments.
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Affiliation(s)
- Luis Cardenas
- Univ Lyon, Université Claude Bernard-Lyon 1, CNRS, IRCELYON-UMR 5256, 2 av. A. Einstein, F-69626 Villeurbanne Cedex, France.
| | - Clément Molinet-Chinaglia
- Univ Lyon, Université Claude Bernard-Lyon 1, CNRS, IRCELYON-UMR 5256, 2 av. A. Einstein, F-69626 Villeurbanne Cedex, France.
| | - Stéphane Loridant
- Univ Lyon, Université Claude Bernard-Lyon 1, CNRS, IRCELYON-UMR 5256, 2 av. A. Einstein, F-69626 Villeurbanne Cedex, France.
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Teterin YA, Ryzhkov MV, Putkov AE, Maslakov KI, Teterin AY, Ivanov KE, Kalmykov SN, Petrov VG. Chemical Bond Nature and Structure of X-ray Photoelectron Spectrum of PaO2. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622060274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Insights on the electrochemical performance of indirect internal reforming of biogas into a solid oxide fuel cell. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Maslakov KI, Teterin YA, Stefanovskaya OI, Kalmykov SN, Teterin AY, Ivanov KE, Danilov SS, Yudintsev SV, Myasoedov BF. X-Ray Photoelectron Spectroscopy of Murataite Ceramics Containing Lanthanides. RADIOCHEMISTRY 2022. [DOI: 10.1134/s1066362221060126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract
Ceramic samples with the following composition (wt %): 50 TiO2, 10 CaO, 10 MnO2, 5 Al2O3, 5 Fe2O3, 10 ZrO2, 10 Ln2O3 (Ln = La, Ce, Nd, Ho) or 10 СеО2, were studied by X-ray photoelectron spectroscopy. According to the data of X-ray phase analysis and scanning electron microscopy, they consist of murataite, zirconolite, and perovskite. In smaller quantities there are crichtonite, pyrophanite-ilmenite, and rutile. Ce3+ dominates in cerium samples: the Ce3+ : Ce4+ ratio is 3 : 1 and does not depend on the method of adding the element to the charge—in the form of СeО2 or Се2О3. All ceramics are dominated by Fe3+, its fraction is 92–94 rel %, while manganese is represented only by Mn3+ cations.
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Putkov AE, Maslakov KI, Teterin YA, Ryzhkov MV, Teterin AY, Ivanov KE, Kalmykov SN, Petrov VG. ELECTRONIC STRUCTURE OF DIOXIDE CfO2. J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621120040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Miran HA, Jaf ZN, Altarawneh M, Jiang ZT. An Insight into Geometries and Catalytic Applications of CeO 2 from a DFT Outlook. Molecules 2021; 26:6485. [PMID: 34770889 PMCID: PMC8588098 DOI: 10.3390/molecules26216485] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/18/2022] Open
Abstract
Rare earth metal oxides (REMOs) have gained considerable attention in recent years owing to their distinctive properties and potential applications in electronic devices and catalysts. Particularly, cerium dioxide (CeO2), also known as ceria, has emerged as an interesting material in a wide variety of industrial, technological, and medical applications. Ceria can be synthesized with various morphologies, including rods, cubes, wires, tubes, and spheres. This comprehensive review offers valuable perceptions into the crystal structure, fundamental properties, and reaction mechanisms that govern the well-established surface-assisted reactions over ceria. The activity, selectivity, and stability of ceria, either as a stand-alone catalyst or as supports for other metals, are frequently ascribed to its strong interactions with the adsorbates and its facile redox cycle. Doping of ceria with transition metals is a common strategy to modify the characteristics and to fine-tune its reactive properties. DFT-derived chemical mechanisms are surveyed and presented in light of pertinent experimental findings. Finally, the effect of surface termination on catalysis by ceria is also highlighted.
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Affiliation(s)
- Hussein A. Miran
- Department of Physics, College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad 10071, Iraq;
| | - Zainab N. Jaf
- Department of Physics, College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad 10071, Iraq;
| | - Mohammednoor Altarawneh
- Department of Chemical and Petroleum Engineering, United Arab Emirates University, Sheikh Khalifa Bin Zayed Street, Al-Ain 15551, United Arab Emirates
| | - Zhong-Tao Jiang
- Surface Analysis and Materials Engineering Research Group, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA 6150, Australia;
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Putkov AE, Teterin YA, Ryzhkov MV, Maslakov KI, Teterin AY, Ivanov KE, Kalmykov SN, Petrov VG. The Valence XPS Structure and the Nature of Chemical Bond in CmO2. RADIOCHEMISTRY 2021. [DOI: 10.1134/s1066362221040020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Putkov AE, Teterin YA, Ryzhkov MV, Teterin AY, Maslakov KI, Ivanov KE, Kalmykov SN, Petrov VG. Electronic Structure and Nature of Chemical Bonds in BkO2. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421060212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Wang G, Zhu G, Ding Y, Xia C, Li Z. Mesoporous acidic functional N-containing ZrNxOy material for polyoxymethylene diethyl ethers synthesis under mild conditions. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Mukherjee S, Shah M, Chaudhari K, Jana A, Sudhakar C, Srikrishnarka P, Islam MR, Philip L, Pradeep T. Smartphone-based Fluoride-specific Sensor for Rapid and Affordable Colorimetric Detection and Precise Quantification at Sub-ppm Levels for Field Applications. ACS OMEGA 2020; 5:25253-25263. [PMID: 33043203 PMCID: PMC7542846 DOI: 10.1021/acsomega.0c03465] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/07/2020] [Indexed: 05/27/2023]
Abstract
Higher levels of fluoride (F-) in groundwater constitute a severe problem that affects more than 200 million people spread over 25 countries. It is essential not only to detect but also to accurately quantify aqueous F- to ensure safety. The need of the hour is to develop smart water quality testing systems that would be effective in location-based real-time water quality data collection, devoid of professional expertise for handling. We report a cheap, handheld, portable mobile device for colorimetric detection and rapid estimation of F- in water by the application of the synthesized core-shell nanoparticles (near-cubic ceria@zirconia nanocages) and a chemoresponsive dye (xylenol orange). The nanomaterial has been characterized thoroughly, and the mechanism of sensing has been studied in detail. The sensor system is highly selective toward F- and shows unprecedented sensitivity in the range of 0.1-5 ppm of F-, in field water samples, which is the transition regime, where remedial measures may be needed. It addresses multiple issues expressed by indicator-based metal complexes used to determine F- previously. Consistency in the performance of the sensing material has been tested with synthetic F- standards, water samples from F- affected regions, and dental care products like toothpastes and mouthwash using a smartphone attachment and by the naked eye. The sensor performs better than what was reported by prior works on aqueous F- sensing.
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Affiliation(s)
- Sritama Mukherjee
- DST Unit of Nanoscience
(DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
- EWRE Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Manav Shah
- DST Unit of Nanoscience
(DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Kamalesh Chaudhari
- DST Unit of Nanoscience
(DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Arijit Jana
- DST Unit of Nanoscience
(DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Chennu Sudhakar
- DST Unit of Nanoscience
(DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Pillalamarri Srikrishnarka
- DST Unit of Nanoscience
(DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Md Rabiul Islam
- DST Unit of Nanoscience
(DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Ligy Philip
- EWRE Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Thalappil Pradeep
- DST Unit of Nanoscience
(DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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19
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Kuila A, Saravanan P. Intramolecular orbital engineered hetero bimetallic Ce‐Fe MOF with reduced transition energy and enhanced visible light property. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5728] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Aneek Kuila
- Environmental Nanotechnology Laboratory, Department of Environmental Science and Engineering Indian Institute of Technology (ISM) Dhanbad Jharkhand 826004 India
| | - Pichiah Saravanan
- Environmental Nanotechnology Laboratory, Department of Environmental Science and Engineering Indian Institute of Technology (ISM) Dhanbad Jharkhand 826004 India
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20
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Structural and Optical Properties of CeO2 Nanoparticles Synthesized by Modified Polymer Complex Method. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-018-01056-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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