Atomic-Scale Investigation on the Evolution of Tio2-Anatase Prepared by a Sonochemical Route and Treated with NaOH

被引：12

作者：

Victoria Dimas, Berenice ^{[1
]}

Hernandez Perez, Isaias ^{[1
]}

Garibay Febles, Vicente ^{[2
]}

Barriga Arceo, Lucia Diaz ^{[3
]}

Suarez Parra, Raul ^{[4
]}

Rivera Olvera, Jesus Noe ^{[5
]}

Luna Paz, Ricardo ^{[1
]}

Melo Maximo, Dulce Viridiana ^{[6
]}

Gonzalez Reyes, Leonardo ^{[1
]}

机构：

[1] Univ Autonoma Metropolitana A, Dept Ciencias Basicas, Av Sn Pablo 180, Mexico City 02200, DF, Mexico

[2] Inst Mexicano Petr, Eje Cent Lazaro Cardenas Norte 152, Mexico City 07730, DF, Mexico

[3] Inst Politecn Nacl, Dept Ingn Met & Mat, ESIQIE UPALM, Mexico City 07738, DF, Mexico

[4] UNAM, Inst Energias Renovables, Priv Xochicalco S-N, Temixco 62580, Morelos, Mexico

[5] Tecnol Nacl Mexico, TES Ixtapaluca TESI, Km 7 Carretera Ixtapaluca Coatepec S-N, Ixtapaluca 56580, Estado De Mexic, Mexico

[6] Tecnol Monterrey, Escuela Ingn & Ciencias, Carretera Lago Guadalupe Km 3-5, Atizapan De Zaragoza 52926, Mexico

来源：

MATERIALS | 2020年 / 13卷 / 03期

关键词：

metal oxides; sonochemistry; electron microscopy; TITANIUM-DIOXIDE NANOPARTICLES; TIO2;

D O I：

10.3390/ma13030685

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To date, the formation mechanisms of TiO2, as well as its heterostructures, have not been clarified. Moreover, detailed research on the transition from a tetragonal anatase phase to the monoclinic phase of the TiO2(B) phase and their interface structure has been quite limited until now. In the present study, we report on the sonochemical synthesis of TiO2-anatase with a crystallite size of 5.2 +/- 1.5 nm under different NaOH concentrations via the hydrothermal method. The use of alkaline solution and the effect of the temperature and reaction time on the formation and structural properties of TiO2-anatase nanopowders were studied. The effects of NaOH concentration on the formation and transformation of titanate structures are subject to thermal effects that stem from the redistribution of energy in the system. These mechanisms could be attributed to three phenomena: (1) the self-assembly of nanofibers and nanosheets, (2) the Ostwald ripening process, and (3) the self-development of hollow TiO2 mesostructures.

引用

页数：12

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