Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 606, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2020.125556
Keywords
g-C3N4; Ferrite; Biochar; Photocatalyst; Methylene blue; Visible-light irradiation
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More and more attentions have currently been paid to photodegradation catalysts for environmental pollution removal because of the increasing environmental pollution. However, practical efficient catalysts still remains a great challenge. Herein, employing biomass bamboo fiber as carbon sources, solvothermal g-C3N4 and hydrothermal novel ferrite Ni0.1Co0.9Fe2O4 as photocatalyst monomers, a novel g-C3N4/Ni0.1Co0.9Fe2O4/biochar hybrid photocatalyst was fabricated by employing post calcination to in-situ form biochar and heterojunction cohybridization. The as-synthesized ternary composite photocatalyst was analyzed with various techniques and the photocatalytic activity was evaluated against the degradation of methylene blue under visible-light irradiation. It was found that both the in-situ-formed low-graphitization biochar and the heterojunction co-hybridization between biochar, g-C3N4 with Ni0.1Co0.9Fe2O4 presented great improvement in photocatalytically degrading dyes. The targeted photocatalyst showed a degradation rate of 96.7 % towards methylene blue within 2 h in the existence of hydrogen peroxide, corresponding to a high degradation reaction rate constant k value of up to 2.833 x 10(-2) min(-1), which is 19 times that of pure g-C3N4 and 5 times that of pure Ni0.1Co0.9Fe2O4. Our targeted photocatalyst exhibits excellent photocatalytic efficiency and cycling stability, signifying a promising application in pollutant removal from environment, and our strategy provides a novel avenue for fabricating various high-performance carbon-modified hybrid photocatalysts.
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