Monolayer Graphitic Carbon Nitride as Metal-Free Catalyst with Enhanced Performance in Photo- and Electro-Catalysis  

作　　者：Huiyan Piao Goeun Choi Xiaoyan Jin Seong‑Ju Hwang Young Jae Song Sung‑Pyo Cho Jin‑Ho Choy 

机构地区：[1]Intelligent Nanohybrid Materials Laboratory(INML),Institute of Tissue Regeneration Engineering(ITREN),Dankook University,Cheonan 31116,Republic of Korea [2]College of Science and Technology,Dankook University,Cheonan 31116,Republic of Korea [3]Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine,Dankook University,Cheonan 31116,Republic of Korea [4]Department of Materials Science and Engineering,College of Engineering,Yonsei University,Seoul 03722,Republic of Korea [5]SKKU Advanced Institute of Nanotechnology(SAINT),Sungkyunkwan University(SKKU),Suwon 440‑746,Republic of Korea [6]Department of Nano Engineering,Sungkyunkwan University(SKKU),Suwon 440‑746,Republic of Korea [7]National Center for Inter‑University Research Facilities(NCIRF),Seoul National University,Seoul 08826,Republic of Korea [8]Graphene Research Center,Advanced Institute of Convergence Technology,Suwon 16229,Republic of Korea [9]Department of Pre‑Medical Course,College of Medicine,Dankook University,Cheonan 31116,Republic of Korea [10]Tokyo Tech World Research Hub Initiative(WRHI),Institute of Innovative Research,Tokyo Institute of Technology,Yokohama 226‑8503,Japan

出　　处：《Nano-Micro Letters》2022年第3期308-321,共14页纳微快报（英文版）

基　　金：supported by Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(No.2020R1I1A1A01072161);and under the framework of the International Cooperation Program managed by NRF(No.2017K2A9A2A10013104);supported by the NRF grant funded by the Korea government(MSIP)(No.NRF-2020R1A2C3008671).

摘　　要：The exfoliation of bulk graphitic carbon nitride(g-C_(3)N_(4))into monolayer has been intensively studied to induce maximum sur-face area for fundamental studies,but ended in failure to realize chemi-cally and physically well-defined monolayer of g-C_(3)N_(4)mostly due to the difficulty in reducing the layer thickness down to an atomic level.It has,therefore,remained as a challenging issue in two-dimensional(2D)chemistry and physics communities.In this study,an“atomic monolayer of g-C_(3)N_(4)with perfect two-dimensional limit”was successfully prepared by the chemically well-defined two-step routes.The atomically resolved monolayer of g-C_(3)N_(4)was also confirmed by spectroscopic and micro-scopic analyses.In addition,the experimental Cs-HRTEM image was collected,for the first time,which was in excellent agreement with the theoretically simulated;the evidence of monolayer of g-C_(3)N_(4)in the perfect 2D limit becomes now clear from the HRTEM image of orderly hexagonal symmetry with a cavity formed by encirclement of three adjacent heptazine units.Compared to bulk g-C_(3)N_(4),the present g-C_(3)N_(4)monolayer showed significantly higher photocatalytic gen-eration of H2O2 and H2,and electrocatalytic oxygen reduction reaction.In addition,its photocatalytic efficiency for H2O2 production was found to be the best for any known g-C_(3)N_(4)nanomaterials,underscoring the remarkable advantage of monolayer formation in optimizing the catalyst performance of g-C_(3)N_(4).

关 键 词：Graphitic carbon nitride MONOLAYER Atomic image Electro-and photo-catalysis 

分 类 号：TQ426[化学工程]