Ag/TiO2 photocatalyst immobilized onto modified natural fibers for photodegradation of anthracene

被引：63

作者：

Lopes, Flavia Cavalcante S. M. R. ^{[1
]}

da Rocha, Maria da Graca C. ^{[2
]}

Bargiela, Pascal ^{[2
]}

Ferreira, Hadma Sousa ^{[1
]}

Pires, Carlos Augusto de M. ^{[1
]}

机构：

[1] Univ Fed Bahia, Lab Reacoes Quim, Escola Politecn, Salvador, BA, Brazil

[2] Univ Fed Bahia, Inst Quim, Campus Univ Ondina, BR-40290170 Salvador, BA, Brazil

来源：

CHEMICAL ENGINEERING SCIENCE | 2020年 / 227卷

关键词：

Photocatalysis; Ag/TiO2; Natural fibers; Anthracene; Photodegradat on; Wastewater; SUPPORTED TIO2 PHOTOCATALYST; VISIBLE-LIGHT; GLASS-FIBER; HETEROGENEOUS PHOTOCATALYSIS; MECHANICAL-PROPERTIES; ANATASE TIO2; BISPHENOL-A; DEGRADATION; REMOVAL; NANOPARTICLES;

D O I：

10.1016/j.ces.2020.115939

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This study reports the application of immobilized Ag/TiO2 onto coconut and sisal fibers to anthracene degradation via the UV-vis radiation. The fibers were previously treated with hot water and CTAB to clean their impurities surfaces. Immobilizations of Ag/TiO2 to the fibers were performed by anchorage of the catalysts via the post-synthesis method. The materials were characterized using AAS, TGA, XRD, UV-vis DRS, FTIR, STEM, EDS, and XPS analysis. FTIR and XPS results indicated the presence of hydroxyl groups and different silver species (Ago, Ag+, and Ag2+) on the catalyst surface. Immobilized Ag/TiO2 exhibited higher activity as compared to suspended Ag/TiO2 and TiO2. Ag/TiO2 immobilized on fibers treated with CTAB promoted the full anthracene photodegradation within 2 h at 40 degrees C. The results demonstrated that sisal and coconut fibers could be used as a support for Ag/TiO2. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：16

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