Solar degradation of contaminants in water: TiO2 solar photocatalysis assisted by up-conversion luminescent materials

被引：48

作者：

Borges, M. E. ^{[1
]}

Sierra, M. ^{[1
]}

Mendez-Ramos, J. ^{[2
]}

Acosta-Mora, P. ^{[2
]}

Ruiz-Morales, J. C. ^{[3
]}

Esparza, P. ^{[3
]}

机构：

[1] Univ La Laguna, Dept Chem Engn, E-38207 San Cristobal la Laguna, Spain

[2] Univ La Laguna, Dept Phys, E-38207 San Cristobal la Laguna, Spain

[3] Univ La Laguna, Dept Chem, E-38207 San Cristobal la Laguna, Spain

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2016年 / 155卷

关键词：

Advanced oxidation process; Photocatalysis; Sunlight irradiation; up-conversion; VISIBLE-LIGHT; DOPED TIO2; DISINFECTION; UV; DECONTAMINATION; PERFORMANCE; OXIDATION; TITANIA; SPHERES;

D O I：

10.1016/j.solmat.2016.06.010

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Solar energy, along with other renewable resources, could potentially solve environmental problems, as demonstrated by recent developments in the use of solar energy, such as solar photocatalysis. Solar photocatalytic technology has been demonstrated to be effective for treating groundwater, drinking water, wastewater and air and soil pollution. In this study, a solar photocatalytic application for wastewater decontamination is presented. Luminescent material has been evaluated as up-conversion material for enhancing the photocatalytic activity. Wastewater decontamination by heterogeneous photocatalysis has been developed in a slurry photo-reactor, using TiO2 as a photocatalyst. The photoactivity of TiO2 under several sun irradiation conditions was investigated. The up-conversion luminescence agent ZBLAN, a rare-earth (Yb-Er-Tm) co-doped fluoride glass (ZrF4- BaF2-LaF3-AIF(3)-NaF), was incorporated to enhance the solar-driven activity of TiO2 because this material could transform the unused near-infrared sunlight tail into UV-vis radiation available for photoreaction activation. The use of ZBLAN has demonstrated an improvement over ordinary titanium dioxide photocatalytic activity under sunlight irradiation for the photocatalytic degradation of pollutants in wastewater. Our results demonstrating the contribution of up-conversion luminescence to the improved photoactivity of titanium dioxide suggest that it can be used to develop new technologies for treating wastewater using solar light. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：194 / 201

页数：8

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