title: Atomically Thin Mesoporous Nanomesh of Graphitic C₃N₄ for High-Efficiency Photocatalytic Hydrogen Evolution.
abstract: Delamination of layer materials into two-dimensional single-atom sheets has induced exceptional physical properties, including large surface area, ultrahigh intrinsic carrier mobility, pronounced changes in the energy band structure, and other properties. Here, atomically thin mesoporous nanomesh of graphitic carbon nitride (g-C3N4) is fabricated by solvothermal exfoliation of mesoporous g-C3N4 bulk made from thermal polymerization of freeze-drying assembled Dicyandiamide nanostructure precursor. With the unique structural advantages for aligned energy levels, electron transfer, light harvesting, and the richly available reaction sites, the as-prepared monolayer of mesoporous g-C3N4 nanomesh exhibits a superior photocatalytic hydrogen evolution rate of 8510 μmol h(-1) g(-1) under λ > 420 nm and an apparent quantum efficiency of 5.1% at 420 nm, the highest of all the metal-free g-C3N4 nanosheets photocatalysts.
authors.affiliation: Key Laboratory of Photoelectronic/Eletrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Han
authors.affiliation: Key Laboratory of Photoelectronic/Eletrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.affiliation: Key Laboratory of Photoelectronic/Eletrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Jian
authors.initials: J
authors.lastname: Gao
authors.affiliation: Key Laboratory of Photoelectronic/Eletrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Cheng
authors.affiliation: Key Laboratory of Photoelectronic/Eletrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Photoelectronic/Eletrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Zhipan
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Photoelectronic/Eletrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Liangti
authors.initials: L
authors.lastname: Qu
keywords: atomically thin mesoporous nanomesh of graphitic-C3N4; freeze-drying self-assembly; hydrogen evolution; photocatalysis; solvothermal exfoliation