空位缺陷
光催化
降级(电信)
硼
兴奋剂
材料科学
光子上转换
氮化硼
石墨氮化碳
化学工程
纳米技术
碳纤维
光化学
化学
复合数
光电子学
催化作用
结晶学
有机化学
电信
计算机科学
工程类
复合材料
作者
Mani Preeyanghaa,Vasudevan Vinesh,Sabarikirishwaran Ponnambalam,Anand Rajkamal,Muthupandian Ashokkumar,Bernaurdshaw Neppolian
出处
期刊:Carbon
[Elsevier]
日期:2022-03-07
卷期号:192: 405-417
被引量:82
标识
DOI:10.1016/j.carbon.2022.03.011
摘要
Graphitic carbon nitride (CN) is recognized as a promising photocatalyst for energy and environmental remediation. However, challenges persist due to limited CN surface-active sites and poor electronic properties. To overcome such challenges, we have synthesized Carbon Quantum Dots decorated Boron-doped Exfoliated CN ([email protected]) via ultrasound-assisted thermal polycondensation method. The substitutional boron doping favored nitrogen-vacancy as evident from experimental results and DFT calculations, which accelerated the charge separation/transfer and the CQD incorporation broadens the light-harvesting ability through photon upconversion. Moreover, the specific surface area of 2CQD-2B-ECN (685 m2/g) was significantly greater than CN providing enormous active sites. 2CQD-2B-ECN were evaluated using Tetracycline (TC) antibiotic, where photocatalysis and sonocatalysis showed 68% and 0.2% degradation in 120 min, respectively. Remarkably, sonophotocatalysis exhibited 84% TC degradation with a synergy index of 1.2 and complete degradation within 180 min. This work reveals an insight into CQD-B-ECN as a novel sonophotocatalyst for the degradation of diverse recalcitrant pollutants.
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