Title : Formation of Heterostructures via Direct Growth CN on h-BN Porous Nanosheets for Metal-free Photocatalysis

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Title of Paper:Formation of Heterostructures via Direct Growth CN on h-BN Porous Nanosheets for Metal-free Photocatalysis

Journal:Nano Energy

Abstract:Many recent advances in creating heterostructures based on 2D materials have opened new possibilities in catalysis. This study prepared a new 2D hybrid photocatalyst (CBN-x) consisting of CN and h-BN using low-cost precursors (urea and boric acid). The effects of CN loading on the structure, surface chemistry and photocatalytic activities were systematically investigated. The photocatalytic activities of CBN-x samples were tested for the production of H-2 and H2O2, which demonstrated markedly enhanced activities without the need of noble metal co-catalysts. However, CBN-x activities for the photocatalytic oxidation of organic compound were not better than that of h-BN. Loading CN on h-BN sheets, C 2p and N 2p orbitals from CN introduce new valence and conduction band edges, which gradually narrowed the bandgap and enhanced light absorption efficiency of the hybrid photocatalysts. In such metal-free systems, electrons generated in CN transfer to h-BN, while photo-generated holes on h-BN transfer to CN, which enhances the charge separation through the heterojunction interface (CN/BN). Therefore, increasing the CN loading enhances the overall efficiency of photocatalysis until excessive loading of CN covers the active sites on h-BN.

All the Authors:Chuhyung Kim,Lihua Lin,TaeHwa Jeon,Sen Lin

First Author:Zuoli He

Indexed by:Journal paper

Correspondence Author:Xinchen Wang,Wonyong Choi

Issue:42

Page Number:58-68

Translation or Not:no

Date of Publication:2017-09-01

Included Journals:SCI、EI、SSCI