In:
Advanced Materials, Wiley, Vol. 31, No. 15 ( 2019-04)
Abstract:
The development of efficient photocatalysts for the degradation of organic pollutants and production of hydrogen peroxide (H 2 O 2 ) is an attractive two‐in‐one strategy to address environmental remediation concerns and chemical resource demands. Graphitic carbon nitride (g‐C 3 N 4 ) possesses unique electronic and optical properties. However, bulk g‐C 3 N 4 suffers from inefficient sunlight absorption and low carrier mobility. Once exfoliated, ultrathin nanosheets of g‐C 3 N 4 attain much intriguing photocatalytic activity. Herein, a mussel‐inspired strategy is developed to yield silver‐decorated ultrathin g‐C 3 N 4 nanosheets (Ag@U‐g‐C 3 N 4 ‐NS). The optimum Ag@U‐g‐C 3 N 4 ‐NS photocatalyst exhibits enhanced electrochemical properties and excellent performance for the degradation of organic pollutants. Due to the photoformed valence band holes and selective two‐electron reduction of O 2 by the conduction band electrons, it also renders an efficient, economic, and green route to light‐driven H 2 O 2 production with an initial rate of 0.75 × 10 −6 m min −1 . The improved photocatalytic performance is primarily attributed to the large specific surface area of the U‐g‐C 3 N 4 ‐NS layer, the surface plasmon resonance effect induced by Ag nanoparticles, and the cooperative electronic capture properties between Ag and U‐g‐C 3 N 4 ‐NS. Consequently, this unique photocatalyst possesses the extended absorption region, which effectively suppresses the recombination of electron–hole pairs and facilitates the transfer of electrons to participate in photocatalytic reactions.
Type of Medium:
Online Resource
ISSN:
0935-9648
,
1521-4095
DOI:
10.1002/adma.201806314
Language:
English
Publisher:
Wiley
Publication Date:
2019
detail.hit.zdb_id:
1474949-X
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