Curcumin‐Functionalized Ag/Ag 2 O Nanocomposites: Efficient Visible‐Light Z‐scheme Photocatalysts | Zendy

Kumar Sunil | Zendy; Verma Alkadevi | Zendy; Pal Shaili | Zendy; Sinha Indrajit | Zendy

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Curcumin‐Functionalized Ag/Ag 2 O Nanocomposites: Efficient Visible‐Light Z‐scheme Photocatalysts

Author(s) -

Kumar Sunil,

Verma Alkadevi,

Pal Shaili,

Sinha Indrajit

Publication year - 2018

Publication title -

photochemistry and photobiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.818

H-Index - 131

eISSN - 1751-1097

pISSN - 0031-8655

DOI - 10.1111/php.12910

Subject(s) - photocatalysis , photochemistry , rhodamine b , surface plasmon resonance , radical , curcumin , visible spectrum , methyl orange , materials science , aqueous solution , plasmon , nanocomposite , irradiation , nanoparticle , chemistry , nanotechnology , optoelectronics , catalysis , organic chemistry , biochemistry , physics , nuclear physics

Curcumin‐functionalized Ag/Ag 2 O (c‐Ag/Ag 2 O) nanocomposites with varying proportions of curcumin and Ag/Ag 2 O were prepared by a simple one pot green synthesis protocol in aqueous medium. The plasmonic band undergoes slight redshift, broadening and decrease in intensity with increase in the proportion of Ag 2 O formed. These composite nanoparticles were found to be efficient visible‐light photocatalysts for aerobic oxidation of methyl orange and rhodamine B (RhB). Functionalization by curcumin significantly enhanced the photocatalytic activity with good reusability. The photocatalytic oxidation rate showed super linear increase with light intensity because of localized surface plasmon resonance ( LSPR )‐induced strong near field. The trapping experiments confirmed that superoxide radicals were the main active species responsible for the degradation reaction. A plasmonic Z‐scheme photocatalytic mechanism is proposed to explain the possible charge transfer and separation behavior of electron–hole pairs among Ag, Ag 2 O and curcumin under visible‐light irradiation.

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