Microwave-Assisted Confining Growth and Liquid Exfoliation of sp^(3)-Hybrid Carbon Nitride Nano/Micro-Crystals  

作　　者：Chenglong Shen Qing Lou Kaikai Liu Guangsong Zheng Runwei Song Jinhao Zang Xigui Yang Xing Li Lin Dong Chongxin Shan 

机构地区：[1]Henan Key Laboratory of Diamond Optoelectronic Materials and Devices,Key Laboratory of Material Physics,Ministry of Education,School of Physics and Laboratory of Zhongyuan Light,Zhengzhou University,Zhengzhou 450052,China

出　　处：《Energy & Environmental Materials》2024年第6期399-408,共10页能源与环境材料（英文）

基　　金：the National Natural Science Foundation of China(12074348,12261141661,62204223,52072345,and 12174348);the China Postdoctoral Science Foundation(2022TQ0307);the Natural Science Foundation of Henan Province(242300421179 and 222102310664).

摘　　要：As one promising carbon-based material,sp^(3)-hybrid carbon nitride has been predicted with various novel physicochemical properties.However,the synthesis of sp^(3)-hybrid carbon nitride is still limited by the nanaoscale,low crystallinity,complex source,and expensive instruments.Herein,we have presented a facile approach to the sp^(3)-hybrid carbon nitride nano/micro-crystals with microwave-assisted confining growth and liquid exfoliation.Actually,the carbon nitride nano/micro-crystals can spontaneously emerge and grow in the microwave-assisted polymerization of citric acid and urea,and the liquid exfoliation can break the bulk disorder polymer to retrieve the highly crystalline carbon nitride nano/micro-crystals.The obtained carbon nitride nano/micro-crystals present superior blue light absorption strength and surprising photoluminescence quantum yields of 57.96% in ethanol and 18.05%in solid state.The experimental characterizations and density functional theory calculations reveal that the interface-trapped localized exciton may contribute to the excellent intrinsic light emission capability of carbon nitride nano/micro-crystals and the interparticle staggered stacking will prevent the aggregation-caused-quenching partially.Finally,the carbon nitride nano/micro-crystals are demonstrated to be potentially useful as the phosphor medium in light-emitting-diode for interrupting blue light-induced eye damage.This work paves new light on the synthesis strategy of sp^(3)-hybrid carbon nitride materials and thus may push forward the development of multiple carbon nitride research.

关 键 词：confining growth density functional theory liquid exfoliation luminescence sp^(3)-hybrid carbon nitride 

分 类 号：TB383[一般工业技术—材料科学与工程]