Mixed phase nano–CdS supported on activated biomass carbon as efficient visible light–driven photocatalysts

Semiconductors are promising photocatalysts for the use of sunlight in energy conversion and environmental remediation. To this end, various synthetic pathways have been proposed to increase their photocatalytic efficiency, catalytic stability, recycle, and reuse. In this work, mixed phase CdS nanop...

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Bibliographic Details
Published in:Environmental science and pollution research international 2019-10, Vol.26 (30), p.31055-31061
Main Authors: Cai, Feng-Ying, Zhang, Yu-Qing, Wang, Jun-Tao, Zhou, Jun-Ru, Cao, Hai-Lei, Lü, Jian
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Biodegradation
Biomass
Cadmium Compounds - chemistry
Catalysis
Catalytic activity
Charcoal - chemistry
Earth and Environmental Science
Ecotoxicology
Energy conversion
Energy gap
Environment
Environmental Chemistry
Environmental cleanup
Environmental Health
Environmental science
Irradiation
Light
Nanoparticles
Nanoparticles - chemistry
Organic chemistry
Photocatalysis
Photocatalysts
Photochemical Processes
Photodegradation
Research Article
Rhodamine
Rhodamines - chemistry
Selenium Compounds - chemistry
Semiconductors
Stability
Waste Water Technology
Water Management
Water Pollutants, Chemical - chemistry
Water Pollution Control
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Summary:Semiconductors are promising photocatalysts for the use of sunlight in energy conversion and environmental remediation. To this end, various synthetic pathways have been proposed to increase their photocatalytic efficiency, catalytic stability, recycle, and reuse. In this work, mixed phase CdS nanoparticles were loaded on the surface of activated biomass carbons to prepare composite photocatalysts via hydrothermal syntheses, which were further applied to photocatalytic degradation of rhodamine B (RhB) under visible irradiation. The composite photocatalysts displayed considerable specific surface area (up to 672 m 2 g −1 ) and suitable band gap energy of ca. 2.1 eV. Due to the excellent light adsorption ability and chemical stability, these composite photocatalysts exhibited excellent photocatalytic capacity toward RhB degradation under visible irradiation. Moreover, the photocatalytic stability was also demonstrated by cyclic experiments, by which the composite photocatalysts retained over 80% of the initial catalytic activity after 4 consecutive runs.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-019-06267-8