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Izvorni znanstveni članak
Amorphization Effects on the Basic Sites of Nanometric Magnesium Oxide
Neftalí Lenin Villarreal Carreño
; Instituto de Química, DQAI, Universidade Federal de Pelotas, Capão do Leão, RS, Brazil
David Keyson
; Departamento de Química, Universidade Federal de São Carlos, São Carlos – SP, Brasil
Marcia Tsuyama Escote
; Departamento de Química, Universidade Federal de São Carlos, São Carlos – SP, Brasil
Edson Roberto Leite
; Departamento de Química, Universidade Federal de São Carlos, São Carlos – SP, Brasil
Elson Longo
; Departamento de Química, Universidade Federal de São Carlos, São Carlos – SP, Brasil
Humberto Vieira Fajardo
; Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis – SC, Brasil
Luiz Fernando Dias Probst
; Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis – SC, Brasil
Antoninho Valentini
; Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Fortaleza – CE, Brasil
Miryam Rincón Joya
; Departamento de Física, Universidade Federal de São Carlos, São Carlos – SP, Brasil
Paulo Sergio Pizani
; Departamento de Física, Universidade Federal de São Carlos, São Carlos – SP, Brasil
| Puni tekst: engleski, pdf (460 KB) | str. 443-451 | citiraj | |
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APA 6th Edition Carreño, N.L.V., Keyson, D., Escote, M.T., Leite, E.R., Longo, E., Fajardo, H.V., ... Pizani, P.S. (2008). Amorphization Effects on the Basic Sites of Nanometric Magnesium Oxide. Croatica Chemica Acta, 81 (3), 443-451. Preuzeto s https://hrcak.srce.hr/31129 MLA 8th Edition Carreño, Neftalí Lenin Villarreal, et al. "Amorphization Effects on the Basic Sites of Nanometric Magnesium Oxide." Croatica Chemica Acta, vol. 81, br. 3, 2008, str. 443-451. https://hrcak.srce.hr/31129. Citirano 08.03.2021. Chicago 17th Edition Carreño, Neftalí Lenin Villarreal, David Keyson, Marcia Tsuyama Escote, Edson Roberto Leite, Elson Longo, Humberto Vieira Fajardo, Luiz Fernando Dias Probst, Antoninho Valentini, Miryam Rincón Joya i Paulo Sergio Pizani. "Amorphization Effects on the Basic Sites of Nanometric Magnesium Oxide." Croatica Chemica Acta 81, br. 3 (2008): 443-451. https://hrcak.srce.hr/31129 Harvard Carreño, N.L.V., et al. (2008). 'Amorphization Effects on the Basic Sites of Nanometric Magnesium Oxide', Croatica Chemica Acta, 81(3), str. 443-451. Preuzeto s: https://hrcak.srce.hr/31129 (Datum pristupa: 08.03.2021.) Vancouver Carreño NLV, Keyson D, Escote MT, Leite ER, Longo E, Fajardo HV i sur. Amorphization Effects on the Basic Sites of Nanometric Magnesium Oxide. Croatica Chemica Acta [Internet]. 2008 [pristupljeno 08.03.2021.];81(3):443-451. Dostupno na: https://hrcak.srce.hr/31129 IEEE N.L.V. Carreño, et al., "Amorphization Effects on the Basic Sites of Nanometric Magnesium Oxide", Croatica Chemica Acta, vol.81, br. 3, str. 443-451, 2008. [Online]. Dostupno na: https://hrcak.srce.hr/31129. [Citirano: 08.03.2021.] |
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Sažetak
The paper reports the catalytic action of the basic sites of nanocrystalline particles of rare
earth-doped magnesium oxide in the aldolization reaction between acetone and methanol leading
to the C–C bond formation of an a,b-unsaturated compound (methyl vinyl ketone), also forming
methyl ethyl ketone and isopropyl alcohol. Undoped and doped MgO samples were prepared by
high-energy mechanical milling of commercial Mg, Y and Ce oxide powders. Catalytic activity
and surface basicity of these compounds were strongly influenced by doping and the time of mechanical
milling (amorphization process). Such milling leads to the formation of nanocrystalline
materials. Influence of mechanical processing of these compounds was investigated by means of
N2 adsorption (BET), X-ray diffraction (XRD), TEM, CO2 chemisorption and room temperature
photoluminescence emission. Strong changes of polar groups such as hydroxyl groups on the
surface of the solid were directly related to the photoluminescence emission observed.
Ključne riječi
magnesium oxide; amorphization; catalysts; photoluminescence; aldol condensation
Hrčak ID: 31129
URI
https://hrcak.srce.hr/31129
Moj profil
Srce