title: A Rapid Microwave-Assisted Thermolysis Route to Highly Crystalline Carbon Nitrides for Efficient Hydrogen Generation.
abstract: Highly crystalline graphitic carbon nitride (g-C3N4) with decreased structural imperfections benefits from the suppression of electron-hole recombination, which enhances its hydrogen generation activity. However, producing such g-C3N4materials by conventional heating in an electric furnace has proven challenging. Herein, we report on the synthesis of high-quality g-C3N4with reduced structural defects by judiciously combining the implementation of melamine-cyanuric acid (MCA) supramolecular aggregates and microwave-assisted thermolysis. The g-C3N4material produced after optimizing the microwave reaction time can effectively generate H2under visible-light irradiation. The highest H2evolution rate achieved was 40.5 μmol h-1, which is two times higher than that of a g-C3N4sample prepared by thermal polycondensation of the same supramolecular aggregates in an electric furnace. The microwave-assisted thermolysis strategy is simple, rapid, and robust, thereby providing a promising route for the synthesis of high-efficiency g-C3N4photocatalysts.
authors.affiliation: School of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, P. R. China.
authors.forename: Yufei
authors.initials: Y
authors.lastname: Guo
authors.affiliation: School of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, P. R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, P. R. China.|School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
authors.forename: Yupeng
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, P. R. China.
authors.forename: Lu
authors.initials: L
authors.lastname: Li
authors.affiliation: School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, P. R. China.
authors.forename: Mingyi
authors.initials: M
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, P. R. China.
authors.forename: Chenyan
authors.initials: C
authors.lastname: Zhou
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
authors.forename: Zhiqun
authors.initials: Z
authors.lastname: Lin
keywords: graphitic carbon nitride; microwave-assisted thermolysis; photocatalysis; supramolecular aggregates; water splitting