Incorporation of photoactive TiO2 in an aluminosilicate inorganic polymer by ion exchange

被引：37

作者：

Gasca-Tirado, J. R. ^{[1
]}

Manzano-Ramirez, A. ^{[1
]}

Villasenor-Mora, Carlos ^{[2
]}

Muniz-Villarreal, M. S. ^{[1
]}

Zaldivar-Cadena, A. A. ^{[3
]}

Rubio-Avalos, J. C. ^{[4
]}

Amigo Borras, Vicente ^{[5
]}

Nava Mendoza, Rufino ^{[6
]}

机构：

[1] IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76230, Mexico

[2] Univ Guanajuato, Leon Guanajuato 37150, Mexico

[3] Univ Autonoma Nuevo Leon, Fac Ingn Civil, Dept Ecomat & Energia, San Nicolas De Los Garza 66450, Nuevo Leon, Mexico

[4] Univ Michoacana, Fac Civil Engn, Morelia 58000, Michoacan, Mexico

[5] Univ Politecn Valencia, Inst Tecnol Mat, Valencia 46022, Spain

[6] UAQ, Fac Ingn, Div Invest & Posgrad, Queretaro 76010, Mexico

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2012年 / 153卷

关键词：

Ion exchange; Porosity; Optical properties; Geopolymer; TiO2; ACTIVE-SITES; GEOPOLYMERS;

D O I：

10.1016/j.micromeso.2011.11.026

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In the present paper, it is described a procedure to ion exchange in an aluminosilicate inorganic polymer (geopolymer) in order to incorporate photoactive TiO2. Metakaolin base geopolymers synthesized at 40 and 90 degrees C were chosen to be ion-exchanged with a solutions of (NH4)(2) TiO (C2O4)(2)-H2O with and without previous treatment with NH4Cl. The final geopolymers were characterized by SEM, FT-IR, Raman, XRD, BET, UV/Vis spectroscopy and fluorescence. It was confirmed that ion-exchange method incorporated anatase TiO2 particles inside the geopolymer, affecting the geopolymers bond vibration modes of the AlO4-SiO4 framework. The observed blue shift in the UV/Vis spectra, suggest that those TiO2 nanoparticles grew inside the micropores of the geopolymer producing quantum size effects. The photoactivity of such particles was determined by means of photoluminescent spectra and bleaching of methylene blue (MB), which confirms the potential applications of ion-exchanged geopolymers (IEGs) for photocatalytic purposes. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：282 / 287

页数：6

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