Journal
CHEMOSPHERE
Volume 286, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.131823
Keywords
Co3O4; Activated carbon; Nanocomposites; Photocatalysts; Hydrogen production
Categories
Funding
- National Research Foundation (NRF) of Korea through the basic science research programs [2016R1A6A1A03012877, 2019R1A2C1085448]
- Korean Government
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The synthesis and characterization of biomass activated carbon-decorated cobalt oxide nanocomposites for solar-stimulated photocatalytic hydrogen production from sulphide wastewater is reported. The nanocomposites showed enhanced hydrogen production efficiency under solar irradiance, indicating great potential for green photocatalytic wastewater splitting.
Natural sunlight-driven photocatalytic hydrogen production from wastewater is one of the most desirable techniques that can realize future green energy technology. Herein, we report the synthesis and the character-ization of the biomass activated carbon (AC)-decorated cobalt oxide (Co3O4) nanocomposites for solar-stimulated photocatalytic hydrogen production from sulphide wastewater. The Co3O4-AC nanocomposites were ultrasoni-cally synthesized by using hydrothermally-grown spinel Co3O4 nanoflakes and biomass-derived AC nanoflakes. Co3O4-AC showed a nanobundle-like aggregated morphology, and exhibited a large specific surface area (-133 m(2)/g). Through utilizing Co3O4-AC as a photocatalyst for photocatalytic splitting of sulphide wastewater (0.2 M) under solar irradiance with 730 W/m(2), an enhanced H-2 production efficiency (-70 mL/h) was achieved owing to the synergic effects from 2-dimentionally configured Co3O4 and AC microstructures; i.e., large surface area of Co3O4 and high electrical conductivity of AC. These findings suggest the nanocomposites of Co3O4-AC to hold great promise for the green approach of photocatalytic wastewater splitting.
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