光催化
异质结
降级(电信)
X射线光电子能谱
材料科学
盐酸四环素
反应速率常数
化学工程
纳米复合材料
四环素
核化学
光化学
纳米技术
化学
催化作用
有机化学
动力学
光电子学
抗生素
物理
工程类
电信
量子力学
生物化学
计算机科学
作者
Qingbo Xu,Peng Wang,Zongqian Wang,Jieliang Shen,Xu Han,Xianhong Zheng,Yuhui Wei,Changlong Li,Kun Song
标识
DOI:10.1016/j.colsurfa.2022.129392
摘要
In this work, the S-scheme heterojunction of g-C3N4/MXene/Ag3PO4 (PCN/M/AP) was successfully constructed via an aerosol self-assembly procedure, in which MXene was employed as the electron mediator. The photocatalytic activity towards the degradation of tetracycline hydrochloride (TC) was found to increase with the mass ratios of MXene to g-C3N4 in the nanocomposites, as MXene dosage increased from 3 wt% to 7 wt%, degradation rates of TC also enhanced from 53.79% to 88.40% at 60 min. And the rate constant value of PCN/M/AP was approximately 4.3 higher than that of the pristine g-C3N4 under visible light illumination, due to the formed of MXene-mediated S-scheme heterojunctions that facilitated separate and transfer of the photogenerated electron-hole pairs. Moreover, the photocatalytic performance of PCN/M/AP toward TC was still maintained 83.80% after five successive recycles. And XRD, XPS and TEM clearly revealed excellent structure stability of PCN/M/AP during the photocatalytic process. The mechanism studies demonstrated that the ·O2- displayed a major role in TC degradation, and h+ and ·OH also affected the removal efficiency greatly. Therefore, this work provides a new insight into the construction of high-performance S-scheme photocatalytic system by using MXene as an electron mediator.
科研通智能强力驱动
Strongly Powered by AbleSci AI