Carbon Dots-Implanted Graphitic Carbon Nitride Nanosheets for Photocatalysis: Simultaneously Manipulating Carrier Transport in Inter- and Intralayers
Carbon Dots-Implanted Graphitic Carbon Nitride Nanosheets for Photocatalysis: Simultaneously Manipulating Carrier Transport in Inter- and Intralayers
复制标题
用于光催化的碳点注入石墨氮化碳纳米片：同时操纵层间和层内的载流子传输
DOI：
10.1002/solr.201900517
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发表时间：
2020-01-24
期刊：
影响因子：
7.9
通讯作者：
Yang, Bai
中科院分区：
文献类型：
--
作者：
Han, Mei;Lu, Siyu;Yang, Bai
Carbon dots (CDs) present unique photoinduced charge transfer and reservoir properties, showing promising application potential in photocatalysis. The in situ preparation of CDs in a graphitic carbon nitride (g-C3N4) matrix provides not only a new approach for electronic structure modulation and heterostructure construction but also an effective way to improve their photocatalytic performance. However, incorporating CDs into ultrathin g-C3N4 remains a challenge. Moreover, simultaneously tuning their carrier transport in inter- and intralayers is difficult but significant for their application as efficient photocatalysts. Herein, an unprecedented Se-chaperoned thermal polymerization method for the synthesis of zero-dimensional CD-implanted g-C3N4 nanosheets (CCNS) is reported. The CCNS simultaneously facilitate carrier transport and suppress recombination because of the seamless bonding heterostructure of CDs within the in-plane domains of the g-C3N4 nanosheets. Accordingly, the photocatalytic rates of water splitting for H-2 evolution and CO2 reduction are enhanced 3.1 and 4.1 times, respectively. In addition, the photocatalytic RhB degradation efficiency dramatically increases 18 times. This work presents a promising solution to solving the current worldwide energy shortage and environmental pollution issues.
