Crafting Mussel‐Inspired Metal Nanoparticle‐Decorated Ultrathin Graphitic Carbon Nitride for the Degradation of Chemical Pollutants and Production of Chemical Resources. Issue 15 (30th January 2019)

• Record Type: Journal Article
• Authors: Cai, Jingsheng; Huang, Jianying; Wang, Shanchi; Iocozzia, James; Sun, Zhongti; Sun, Jingyu; Yang, Yingkui; Lai, Yuekun; Lin, Zhiqun
• Is Part Of: Advanced materials. Volume 31:Issue 15(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-01-30
• Subjects: Ag nanoparticle -- graphitic carbon nitride -- hydrogen peroxide production -- photocatalysis -- polydopamine; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201806314
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: The development of efficient photocatalysts for the degradation of organic pollutants and production of hydrogen peroxide (H2 O2 ) is an attractive two‐in‐one strategy to address environmental remediation concerns and chemical resource demands. Graphitic carbon nitride (g‐C3 N4 ) possesses unique electronic and optical properties. However, bulk g‐C3 N4 suffers from inefficient sunlight absorption and low carrier mobility. Once exfoliated, ultrathin nanosheets of g‐C3 N4 attain much intriguing photocatalytic activity. Herein, a mussel‐inspired strategy is developed to yield silver‐decorated ultrathin g‐C3 N4 nanosheets (Ag@U‐g‐C3 N4 ‐NS). The optimum Ag@U‐g‐C3 N4 ‐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 O2 by the conduction band electrons, it also renders an efficient, economic, and green route to light‐driven H2 O2 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‐C3 N4 ‐NS layer, the surface plasmon resonance effect induced by Ag nanoparticles, and the cooperative electronic capture properties between Ag and U‐g‐C3 N4 ‐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. Abstract : A facile and green strategy is developed to craft silver‐decorated ultrathin graphitic carbon nitride nanosheets (Ag@U‐g‐C3 N4 ‐NS) through a post gas‐etching treatment of bulk g‐C3 N4 in conjunction with the uniform growth of Ag nanoparticles on its surface via a mussel‐inspired dopamine polymerization. The optimum Ag@U‐g‐C3 N4 ‐NS photocatalyst exhibits excellent electrochemical properties and performance for the degradation of organic pollutants and H2 O2 production.