Synthesis of crystalline g-C_(3)N_(4) with rock/molten salts for efficient photocatalysis and piezocatalysis  

作　　者：Tingting Xu Jung Hur Ping Niu Shulan Wang Sangwook Lee Sang-Eun Chun Li Li 

机构地区：[1]Department of Chemistry,College of Science,Northeastern University,Shenyang,110819,China [2]State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang,110819,China [3]School of Metallurgy,Northeastern University,Shenyang,110819,China [4]School of Materials Science and Engineering,Kyungpook National University,Daegu,41566,Republic of Korea [5]School of Industrial Technology Advances,Kyungpook National University,Daegu,41566,Republic of Korea

出　　处：《Green Energy & Environment》2024年第5期890-898,共9页绿色能源与环境（英文版）

基　　金：supported by the National Natural Science Foundation of China(51902045,51904059);Fundamental Research Funds for the Central Universities(N2002005,N2125004,N2225038,N2225044);Applied Basic Research Program of Liaoning(2022JH2/101300200);Young Elite Scientist Sponsorship Program by CAST(YESS)2019-2021QNRC;National Research Foundation of Korea(NRF)grant funded by the Korean government(Ministry of Science,ICT&Future Planning)(NRF-2020R1F1A1075601 and NRF-2021R1A4A2001658).

摘　　要：Graphitic carbon nitride(g-C_(3)N_(4))is emerging as a promising visible-light photocatalyst while the low crystallinity with sluggish charge separation/migration dynamics significantly restricts its practical applications.Currently,synthesizing highly crystalline g-C_(3)N_(4) with sufficient surface activities still remains challenging.Herein,different from using alkali molten salts which is commonly reported,we propose an approach for synthesis of highly crystalline g-C_(3)N_(4) with FeCl3/KCl rock/molten mixed salts.The rock salt can serve as the structure-directing template while molten salt provides the required liquid medium for re-condensation.Intriguingly,the synthesized photocatalyst showed further enhanced crystallinity and improved surface area along with high p/p*excitation compared with crystalline C_(3)N_(4) prepared from conventional molten-salt methods.These catalytically advantageous features lead to its superior photocatalytic and piezocatalytic activities with a high reactivity for overall water splitting that is not commonly reported for C_(3)N_(4).This work provides an effective strategy for structural optimization of organic semiconductor based materials and may inspire new ideas for the design of advanced photocatalysts.

关 键 词：High crystallinity Carbon nitride PHOTOCATALYSIS Piezocatalysis Overall water splitting 

分 类 号：TQ426[化学工程] TB383.1[一般工业技术—材料科学与工程]