Construction of n-TiO2/p-Ag2O Junction on Carbon Fiber Cloth with Vis–NIR Photoresponse as a Filter-Membrane-Shaped Photocatalyst

The development of effective and reusable photocatalysts with broad-spectra activity has attracted attention. Herein, we have constructed n -TiO 2 / p -Ag 2 O junction on carbon fiber (CF) cloth as an efficient and recyclable photocatalyst. With CF cloth as the substrate, TiO 2 nanorods (length: 1–2...

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Published in:Advanced fiber materials (Online) 2020-02, Vol.2 (1), p.13-23
Main Authors: Duoerkun, Gumila, Zhang, Yan, Shi, Zhun, Shen, Xiaofeng, Cao, Wei, Liu, Ting, Liu, Jianshe, Chen, Quanyuan, Zhang, Lisha
Format: Article
Language:English
Subjects:
Bisphenol A
Carbon fibers
Chemistry and Materials Science
Cloth
Dyes
Hexavalent chromium
Illumination
Light
Materials Engineering
Materials Science
Membranes
Nanoparticles
Nanorods
Nanoscale Science and Technology
Orange II
Photocatalysis
Photocatalysts
Pollutants
Polymer Sciences
Recycling
Renewable and Green Energy
Research Article
Rhodamine
Semiconductors
Solar energy
Substrates
Textile Engineering
Titanium dioxide
Water purification
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Summary:The development of effective and reusable photocatalysts with broad-spectra activity has attracted attention. Herein, we have constructed n -TiO 2 / p -Ag 2 O junction on carbon fiber (CF) cloth as an efficient and recyclable photocatalyst. With CF cloth as the substrate, TiO 2 nanorods (length: 1–2 µm) are prepared by a hydrothermal process, and the in-situ growth of Ag 2 O nanoparticles (10–20 nm) is then realized by chemical bath deposition route. The flexible CF/TiO 2 /Ag 2 O cloth (area: 4 × 4 cm 2 ) shows a broad and strong photo-absorption (200–1000 nm). Under the illumination of visible-light (λ > 400 nm), CF/TiO 2 /Ag 2 O cloth can efficiently eliminate 99.2% rhodamine B (RhB), 99.4% acid orange 7 (AO7), 87.6% bisphenol A (BPA), and 89.5% hexavalent chromium (Cr 6+ ) in 100 min, superior to CF/Ag 2 O cloth (83.5% RhB, 60.0% AO7, 31.2% BPA and 41.8% Cr 6+ ). In particular, under the NIR-light illumination (980 nm laser), CF/TiO 2 /Ag 2 O cloth can remove 70.9% AO7 and 60.0% Cr 6+ in 100 min, which are significantly higher than those by CF/Ag 2 O cloth (19.8% AO7 and 18.9% Cr 6+ ). In addition, CF/TiO 2 /Ag 2 O cloth (diameter: 10 cm), as a filter-membrane, can effectively wipe off 94.4% flowing RhB solution (rate: ~ 1 L h − 1 ) at 6th filtering/degrading grade. Thus, CF/TiO 2 /Ag 2 O cloth can be used as a Vis–NIR-responded filter-membrane-shaped photocatalyst with high-efficiency for purifying wastewater.
ISSN:2524-7921
2524-793X
DOI:10.1007/s42765-019-00025-8