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Construction of n-TiO2/p-Ag2O Junction on Carbon Fiber Cloth with Visa??NIR Photoresponse as a Filter-Membrane-Shaped Photocatalyst
摘要： The development of effective and reusable photocatalysts with broad-spectra activity has attracted attention. Herein, we have constructed n-TiO2/p-Ag2O junction on carbon fiber (CF) cloth as an efficient and recyclable photocatalyst. With CF cloth as the substrate, TiO2 nanorods (length: 1–2 μm) are prepared by a hydrothermal process, and the in-situ growth of Ag2O nanoparticles (10–20 nm) is then realized by chemical bath deposition route. The flexible CF/TiO2/Ag2O cloth (area: 4 × 4 cm2) shows a broad and strong photo-absorption (200–1000 nm). Under the illumination of visible-light (λ > 400 nm), CF/TiO2/Ag2O 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 (Cr6+) in 100 min, superior to CF/Ag2O cloth (83.5% RhB, 60.0% AO7, 31.2% BPA and 41.8% Cr6+). In particular, under the NIR-light illumination (980 nm laser), CF/TiO2/Ag2O cloth can remove 70.9% AO7 and 60.0% Cr6+ in 100 min, which are significantly higher than those by CF/Ag2O cloth (19.8% AO7 and 18.9% Cr6+). In addition, CF/TiO2/Ag2O 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/TiO2/Ag2O cloth can be used as a Vis–NIR-responded filter-membrane-shaped photocatalyst with high-efficiency for purifying wastewater.
关键词： n-TiO2/p-Ag2O junction,Filter-membrane,Photocatalyst,Vis-NIR photoresponse,Carbon fiber cloth
更新于2025-09-23 15:21:01
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MoS2/Bi2S3 heterojunctions-decorated carbon-fiber cloth as flexible and filter-membrane-shaped photocatalyst for the efficient degradation of flowing wastewater
摘要： Traditional powder/film-shaped photocatalysts suffer some serious limitations (such as recycling difficulty or high-cost) in the degradation of flowing wastewater. Herein, we report a novel filter-membrane-shaped photocatalyst by constructing MoS2/Bi2S3 heterojunctions on carbon-fiber cloth (CF/MoS2/Bi2S3 cloth). CF/MoS2/Bi2S3 cloth consists of carbon-fibers (diameter: ~ 15 μm) which are decorated with numerous MoS2 nanosheets (thickness: ~ 2 nm) and Bi2S3 nanorods (length: 500 ~ 600 nm), and it exhibits a broad-spectrum photoabsorption from ultraviolet to near-infrared region (> 1200 nm). Under visible-light irradiation, CF/MoS2/Bi2S3 cloth (area: 4 × 4 cm2) exhibits the highest photocurrent (~ 1.44 mA cm-2) and can photocatalytically remove 95.1% rhodamine B (RhB), 91.8% methylene blue (MB), 74.5% tetracycline (TC) and 75.5% hexavalent chromium (Cr(VI)) after 100 min, better than those by CF/MoS2 cloth (37.0% RhB, 39.9% MB, 29.6% TC, 21.6% Cr(VI)) and CF/Bi2S3 cloth (26.9% RhB, 27.4% MB, 20.9% TC, 25.9% Cr(VI)). Importantly, when flexible CF/MoS2/Bi2S3 cloth (diameter: 10 cm) is used as the filter-membrane to degrade the flowing wastewater (rate: ~ 1 L h-1), the removal efficiency of RhB increases from 19.7% at 1st to 94.6% at 8th filtering/degrading grade. Thus, CF/MoS2/Bi2S3 cloth has excellent potential as a novel filter-membrane-shaped photocatalyst to degrade the flowing wastewater.
关键词： MoS2/Bi2S3,carbon-fiber cloth,flowing wastewater,filter-membrane,photocatalysis
更新于2025-09-11 14:15:04