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Wang D, Zhang C, Xie Y, Pan Z, Xue X, Zhang R. A study on the catalytic oxidation of soot by Sn–Ce composite oxides: adsorbed oxygen and defect sites synergistically enhance catalytic activity. NEW J CHEM 2019. [DOI: 10.1039/c9nj04134f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two reaction paths in the presence of a Sn–Ce catalyst with H2O (path 1) and without H2O (path 2).
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Affiliation(s)
- Dengtai Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Changsen Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Yunyun Xie
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Zeyou Pan
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Xiangfei Xue
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
| | - Ruiqin Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
- Environmental Chemistry & Low Carbon Technologies Key Lab of Henan Province
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2
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Livraghi S, Barbero N, Agnoli S, Barolo C, Granozzi G, Sauvage F, Giamello E. A multi-technique comparison of the electronic properties of pristine and nitrogen-doped polycrystalline SnO2. Phys Chem Chem Phys 2018; 18:22617-27. [PMID: 27477515 DOI: 10.1039/c6cp02822e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitrogen doped tin(iv) oxide (SnO2) materials in the form of nanometric powders have been prepared by precipitation with ammonia. Their properties have been compared with those of undoped materials obtained in a similar way using various physical techniques such as photoelectron spectroscopies (XPS and UPS), UV-Vis-NIR spectroscopy and electron paramagnetic resonance (EPR). Nitrogen doping leads to the formation of various nitrogen containing species, the more relevant of which is a nitride-type ionic species, based on the substitution of a lattice oxygen atom with a nitrogen atom. This species exists in two forms, paramagnetic (hole centre, formally N(2-)) and diamagnetic (N(3-)). The mutual ratio of the two species varies according to the oxidation state of the material. The doped solid, like most of the semiconducting oxides, tends to lose oxygen forming oxygen vacancies upon annealing under vacuum and leaving an excess of electrons in the solid. The stoichiometry of the solid can thus be markedly changed depending on the external conditions. Excess electrons are present both as itinerant electrons in the conduction band and as Sn(ii) states lying close to the valence band maximum. The presence of nitride-type centres, which are low energy states located below the top of the valence band, decreases the energy cost for the formation of oxygen vacancies by O2 release from the lattice. This particular feature of the doped system represents a severe limit to the preparation of a p-type SnO2via nitrogen doping.
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Affiliation(s)
- S Livraghi
- Dipartimento di Chimica, Università di Torino and NIS, Centre for Nanostructured Interfaces and Surfaces, Via P. Giuria 7, I - 10125 Torino, Italy
| | - N Barbero
- Dipartimento di Chimica, Università di Torino and NIS, Centre for Nanostructured Interfaces and Surfaces, Via P. Giuria 7, I - 10125 Torino, Italy and Laboratoire de Réactivité et Chimie des Solides, Université de Picardie Jules Verne, CNRS UMR 7314, 33 rue Saint Leu, 80039 Amiens, France
| | - S Agnoli
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - C Barolo
- Dipartimento di Chimica, Università di Torino and NIS, Centre for Nanostructured Interfaces and Surfaces, Via P. Giuria 7, I - 10125 Torino, Italy
| | - G Granozzi
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - F Sauvage
- Laboratoire de Réactivité et Chimie des Solides, Université de Picardie Jules Verne, CNRS UMR 7314, 33 rue Saint Leu, 80039 Amiens, France
| | - E Giamello
- Dipartimento di Chimica, Università di Torino and NIS, Centre for Nanostructured Interfaces and Surfaces, Via P. Giuria 7, I - 10125 Torino, Italy
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Colloidal europium nanoparticles via a solvated metal atom dispersion approach and their surface enhanced Raman scattering studies. J Colloid Interface Sci 2016; 476:177-183. [DOI: 10.1016/j.jcis.2016.05.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 05/11/2016] [Accepted: 05/12/2016] [Indexed: 11/20/2022]
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Marakatti VS, Manjunathan P, Halgeri AB, Shanbhag GV. Superior performance of mesoporous tin oxide over nano and bulk forms in the activation of a carbonyl group: conversion of bio-renewable feedstock. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01252j] [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]
Abstract
The efficiency of mesoporous tin oxide as an acid catalyst in the activation of a carbonyl group through selected organic transformations involving the conversion of biomass derived molecules to value-added chemicals is reported.
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Affiliation(s)
- Vijaykumar S. Marakatti
- Materials Science Division
- Poornaprajna Institute of Scientific Research (PPISR)
- Bangalore-562164
- India
| | - Pandian Manjunathan
- Materials Science Division
- Poornaprajna Institute of Scientific Research (PPISR)
- Bangalore-562164
- India
| | - Anand B. Halgeri
- Materials Science Division
- Poornaprajna Institute of Scientific Research (PPISR)
- Bangalore-562164
- India
| | - Ganapati V. Shanbhag
- Materials Science Division
- Poornaprajna Institute of Scientific Research (PPISR)
- Bangalore-562164
- India
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Pieta I, García-Diéguez M, Larrubia M, Alemany L, Epling W. Sn-modified NOX storage/reduction catalysts. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.04.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Xu X, Zhang R, Zeng X, Han X, Li Y, Liu Y, Wang X. Effects of La, Ce, and Y Oxides on SnO2Catalysts for CO and CH4Oxidation. ChemCatChem 2013. [DOI: 10.1002/cctc.201200760] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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7
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Nanostructured copper, chromium, and tin oxide multicomponent materials as catalysts for methanol decomposition: 11C-radiolabeling study. J Colloid Interface Sci 2013; 389:244-51. [DOI: 10.1016/j.jcis.2012.09.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Revised: 08/29/2012] [Accepted: 09/06/2012] [Indexed: 11/17/2022]
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Chall S, Saha A, Biswas SK, Datta A, Bhattacharya SC. Single step aqueous synthesis of pure rare earth nanoparticles in biocompatible polymer matrices. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30971h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Lan F, Wang X, Xu X, Zhang R, Zhang N. Preparation and characterization of SnO2 catalysts for CO and CH4 oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2011. [DOI: 10.1007/s11144-011-0400-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Wang M, Liu Y, Xue D, Zhang D, Yang H. Preparation of nanoporous tin oxide by electrochemical anodization in alkaline electrolytes. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.07.085] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Synthesis and Characterization of Wormhole-Like Mesoporous SnO2 with High Surface Area. CHINESE JOURNAL OF CATALYSIS 2010. [DOI: 10.1016/s1872-2067(09)60052-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Neramittagapong A, Grisdanurak N, Neramittagapong S. Suppression of CO on methanol decomposition over SnO2 catalysts. J IND ENG CHEM 2008. [DOI: 10.1016/j.jiec.2008.02.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Fajardo HV, Longo E, Probst L, Valentini A, Carreño N, Nunes MR, Maciel AP, Leite ER. Influence of Rare Earth Doping on the Structural and Catalytic Properties of Nanostructured Tin Oxide. NANOSCALE RESEARCH LETTERS 2008; 3:194. [PMCID: PMC3244857 DOI: 10.1007/s11671-008-9135-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Accepted: 05/07/2008] [Indexed: 05/19/2023]
Abstract
Nanoparticles of tin oxide, doped with Ce and Y, were prepared using the polymeric precursor method. The structural variations of the tin oxide nanoparticles were characterized by means of nitrogen physisorption, carbon dioxide chemisorption, X-ray diffraction, and X-ray photoelectron spectroscopy. The synthesized samples, undoped and doped with the rare earths, were used to promote the ethanol steam reforming reaction. The SnO2-based nanoparticles were shown to be active catalysts for the ethanol steam reforming. The surface properties, such as surface area, basicity/base strength distribution, and catalytic activity/selectivity, were influenced by the rare earth doping of SnO2and also by the annealing temperatures. Doping led to chemical and micro-structural variations at the surface of the SnO2particles. Changes in the catalytic properties of the samples, such as selectivity toward ethylene, may be ascribed to different dopings and annealing temperatures.
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Affiliation(s)
- Humberto V Fajardo
- Instituto de Química de Araraquara, Departamento de Bioquímica e Tecnologia Química, Universidade Estadual Paulista, Rua Francisco Degni s/n, Quitandinha, 14801-907, Araraquara, SP, Brasil
| | - Elson Longo
- Instituto de Química de Araraquara, Departamento de Bioquímica e Tecnologia Química, Universidade Estadual Paulista, Rua Francisco Degni s/n, Quitandinha, 14801-907, Araraquara, SP, Brasil
| | - LuizFD Probst
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-900, Florianópolis, SC, Brasil
| | - Antoninho Valentini
- Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, 60451-970, Fortaleza, CE, Brasil
| | - NeftalíLV Carreño
- Departamento de Química Analítica e Inorgânica, Universidade Federal de Pelotas, 96010-900, Capão do Leão, RS, Brasil
| | - Michael R Nunes
- Departamento de Química Analítica e Inorgânica, Universidade Federal de Pelotas, 96010-900, Capão do Leão, RS, Brasil
| | - Adeilton P Maciel
- Departamento de Química, Universidade Federal de São Carlos, 13560-905, São Carlos, SP, Brasil
| | - Edson R Leite
- Departamento de Química, Universidade Federal de São Carlos, 13560-905, São Carlos, SP, Brasil
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Xu G, Zhang YW, Sun X, Xu CL, Yan CH. Synthesis, Structure, Texture, and CO Sensing Behavior of Nanocrystalline Tin Oxide Doped with Scandia. J Phys Chem B 2005; 109:3269-78. [PMID: 16851352 DOI: 10.1021/jp045282u] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Weakly agglomerated nanocrystalline scandia doped tin oxide powders with high surface area (170-220 m(2)/g) and uniform size (3-4 nm) were synthesized for the first time by a two-step hydrothermal process in the presence of urea, followed by the calcination between 500 and 1200 degrees C. The structure and texture of the binary oxide system were characterized by thermogravimetry and differential thermal analysis, Brunauer-Emmett-Teller-specific surface area analysis, transmission electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. A metastable scandium tin oxide solid solution in tetragonal structure was formed for the scandia content lower than 6 mol % as the samples were calcined at 800 degrees C, and the excess Sc atoms were dispersed at the surface of the crystallites above this limit. The solid solution was metastable, so scandium migrated toward the surface region of the crystallites and produced a second phase of Sc(4)Sn(3)O(12) during calcining at high temperatures over 1000-1200 degrees C. In the case of the samples with higher dopant concentration (>15 mol %), the calcination at the temperature between 500 and 800 degrees C caused the precipitation of Sc(2)O(3), and the calcination over 1000-1200 degrees C led to the formation of more Sc(4)Sn(3)O(12). Textural analysis showed that doping an appropriate amount of Sc(2)O(3) into nanosized SnO(2) could effectively inhibit the grain growth and stabilize the surface area against high-temperature calcinations below 1000 degrees C. CO gas-sensing property measurements revealed that the dispersion of Sc at the surfaces of the SnO(2) nanocrystallites could improve the CO sensitivity significantly, and the pellet sample with scandia content of 10 mol % sintered at 800 degrees C showed the best CO gas-sensing property in the operation temperature range of 300-400 degrees C. On the basis of the structural and textural analysis, the correlation between the structure/texture and the sensitivity to CO for the as-calcined (SnO(2))(1-x)(Sc(2)O(3))(x) nanocrystallites has been established and explained.
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Affiliation(s)
- Gang Xu
- State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry, Peking University, Beijing 100871, China
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