Biochar Nanoparticles over TiO2 Nanotube Arrays: A Green Co-Catalyst to Boost the Photocatalytic Degradation of Organic Pollutants
نویسندگان
چکیده
Biochar nanoparticles (BC NPs), produced by low temperature pyrolysis (350 °C) of microalgae (Nannochloropsis sp.) and nutshells, are proposed as low-cost sustainable co-catalysts to promote the photocatalytic activity TiO2 nanotube (NT) arrays towards degradation methylene blue (MB) used an organic pollutant model molecule. BC NPs (size < 25 nm) were obtained treating bulk (i.e., biomass after pyrolysis) sonication–centrifugation cycles in a water solution. The filtered dispersion was deposited simple drop-casting on NT support. loading varied performing multiple depositions. Photocatalytic experiments under UV light (365 revealed that decoration with significantly improves photoactivity. Such enhancement is mainly influenced amount deposited; upon optimizing deposition conditions, rate MB increases approximately three times respect bare TiO2, almost irrespective nature raw material. greater BC-TiO2 can be attributed synergistic combination reactant/product adsorption catalytic adsorbed pollutant, well improved charge carrier separation electron transfer.
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ژورنال
عنوان ژورنال: Catalysts
سال: 2021
ISSN: ['2073-4344']
DOI: https://doi.org/10.3390/catal11091048