Synthesis and characterization of a novel tungstosilicic acid immobilized on zeolites catalyst for the photodegradation of methyl orange

被引：44

作者：

Leal Marchena, Candelaria ^{[1
,3
]}

Lerici, Laura ^{[1
,3
]}

Renzini, Soledad ^{[1
,3
]}

Pierella, Liliana ^{[1
,3
]}

Pizzio, Luis ^{[2
,3
]}

机构：

[1] UTN CONICET, Ctr Invest & Tecnol Quim CITeQ, RA-5016 Cordoba, Argentina

[2] UNLP CCT La Plata, CONICET, Ctr Invest & Desarrollo Ciencias Aplicadas Dr JJ, Dept Quim,Fac Ciencias Exactas, RA-1900 La Plata, Buenos Aires, Argentina

[3] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2016年 / 188卷

关键词：

Photocatalysis; Zeolites; Tungstosilicic acid; Azoic dye; PHOTOCATALYTIC DEGRADATION; VISIBLE-LIGHT; DODECATUNGSTOPHOSPHORIC ACID; AQUEOUS SUSPENSION; HETEROPOLY ACIDS; AZO-DYES; TIO2; OXIDATION; DECOLORIZATION; SILICA;

D O I：

10.1016/j.apcatb.2016.01.064

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：

Materials based on tungstosilicic acid (TSA) immobilized on zeolites (NH4Y and NH(4)ZSM5) were prepared by wet impregnation of the zeolite matrix with TSA aqueous solutions. The concentration was varied in order to obtain TSA contents of 5%, 10%, 20%, and 30% w/w in the solid. Catalysts were further characterized by N-2 adsorption-desorption isotherms, FT-IR, XRD, DRS-UV-vis and SEM techniques. The resulting materials were evaluated in the photodecomposition of azo dye methyl orange. The results revealed that the materials present suitable properties to be used as catalysts in the photocatalytic treatment of wastewater containing dyes, and the photodegradation follows a pseudo-first-order kinetics. Reaction parameters such as TSA content, catalysts mass, reuses and pH, were evaluated. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：23 / 30

页数：8

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