期刊
CHEMICAL ENGINEERING JOURNAL
卷 431, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.133914
关键词
Ultrathin g-C3N4 nanosheet; WO3.nH(2)O nanoplates; Nitrogen doped carbon quantum dot ; All-solid-state Z scheme; Tetracycline degradation
资金
- MHRD, India
An all-solid-state Z scheme composite with excellent photocatalytic degradation performance and stability has been successfully designed through a single-step hydrothermal treatment.
The rational design of an all-solid-state Z scheme composite through a single-step hydrothermal treatment by combining ultrathin defect engineered graphitic carbon nitride nanosheets (DCN), tungsten oxide hydrate nanoplates (W), and nitrogen doped carbon quantum dots (NCQDs) has been reported. For the first time, this study demonstrates that NCQD could successfully exfoliate g-C3N4 to produce few-layered thick g-C3N4 nano sheets, besides playing the role of an electron mediator in the composite. The 10%W/1%NCQD/DCN composite exhibited the highest photocatalytic tetracycline degradation efficiency under an 18 W LED illumination. It illustrated a 31.5, 7.7, and 5.2-times higher apparent degradation rate constant (0.044 min(-1)) than W, bulk gC(3)N(4), and DCN, respectively. Further, the composite exhibited an outstanding efficacy toward the degradation of various real water matrices. The composite demonstrated high stability and reusability. Furthermore, a plausible all-solid-state Z scheme charge carrier mechanism is proposed based on the results of the radical scavenging experiments.
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