Journal
CHEMOSPHERE
Volume 259, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.127389
Keywords
Metal-organic frameworks; Corncob; Porous carbon; Synergistic effect; Photocatalytic degradation
Categories
Funding
- National Natural Science Foundation of China [31670592]
- Special Project for Double First-Class -Cultivation of Innovative Talents [000/41113102]
- Fundamental Research Funds for the Central Universities [2572020DX01]
- Natural Science Funds for Distinguished Young Scholar of Heilongjiang Province [JQ2019C001]
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Metal-organic frameworks (MOFs) are promising for photocatalysis owing to their excellent structure and performance. Unfortunately, poor stability in both aqueous solutions and high temperatures and lack of adsorption centers during reactions limit their practical applications. Herein, a bimetallic MOF anchored corncob calcined derived activated carbon (CCAC) was successfully prepared by a one-step solvothermal method. Benefiting from unique structures and synergetic effect, the porous carbon provided a high specific surface area for stable MOF support and served as an organic pollutant bufferreservoir, which was advantageous for efficient photocatalytic degradation of organic pollutants. The optimized MOF/CCAC-5 samples possessed excellent visible light degradation rate, i.e., 100% for Rh B, more than 96% for six mixed dyes, and 98% for tetracycline. This prominent photocatalytic activity was caused by active species, including photoelectrons (e(-)), photo-holes (h(+)) and superoxide free radicals (center dot O2-). The transient photocurrent response and electrochemical impedance tests showed that MOF/CCAC-5 exhibited a relatively high charge separation and low carrier recombination rate. Cyclic and simulation experiments indicated high reusability, stability and universality of the composite photocatalysts. These exciting results provide new pathways for the fabrication of MOFs anchored porous carbon materials. (C) 2020 Elsevier Ltd. All rights reserved.
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