石墨氮化碳
光催化
材料科学
碳纤维
氮化碳
化学工程
罗丹明B
纳米技术
催化作用
光化学
化学
复合数
复合材料
有机化学
工程类
作者
Toshali Bhoyar,Nishprah Saraswat,M. V. Jyothirmai,Akanksha Gupta,Sunita Kumari Malla,Jiyeon Park,Devthade Vidyasagar,Suresh S. Umare
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2023-02-27
卷期号:6 (5): 3484-3496
被引量:4
标识
DOI:10.1021/acsanm.2c05239
摘要
Functionalized carbon dots (CDs) exhibit intriguing photo-exciton dynamics. CDs can donate or accept electrons depending on their functional groups and electrostatic characteristics. We exploited the electron-accepting capability of nitrogen-doped graphitic carbon dots (N-g-CDs) to improve the charge-carrier separation of the polymeric carbon nitride (PCN) photocatalyst. l-Aspartic acid pyrolyzed at 320 °C yielded ∼25 nm size N-g-CDs that were embedded with PCN. The in-plane infiltration of nanosized N-g-CDs increased the surface area of PCN from 11.5 to 104.9 m2 g–1. The N-g-CDs/PCN hybrid catalyst tested for photocatalytic chromium reduction evidenced about a 3-fold higher rate than PCN. Also, the antibiotic tetracycline and rhodamine B dye rapidly degraded with faster degradation kinetics. The carrier dynamic analysis and computational investigations suggest that the electron acceptor feature of N-g-CDs governs the effective separation of photo-excitons and the high surface area of N-g-CDs/PCN contributes to photoactivity enhancement. This study offers insights into designing high-performance metal-free photocatalysts for water treatment applications.
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