Affiliation:
1. Key Laboratory of laser Technology and Optoelectronic Functional Materials of Hainan Province, Key Laboratory of Functional Materials and Photochemistry of Haikou, Collage of Chemistry and Chemical Engineering Hainan Normal University Haikou China
2. College of Optoelectronic Engineering Changchun University of Science and Technology Changchun China
3. Guangxi Key Laboratory of Machine Vision and Intelligent Control Wuzhou University Wuzhou China
Abstract
AbstractBackgroundTransition metal oxides have been proved effective for improving photocatalytic performance of graphitic carbon nitride by constructing different heterojunctions. Although much progress has been made in this field, the effect of transition metal oxides on photocatalytic process is still not very clear.AimsHerein, we fabricated g‐C3N4/ZrO2 based photocatalyst and investigated its morphology, elemental state and photophysical process.Materials & Methodsg‐C3N4/ZrO2 was performed through physical mixing methods. In order to delve into the effect of ZrO2 doping on g‐C3N4, detailed characterization was done by SEM, TEM, BET, PL, XRD, XPS, UV‐vis DRS, FTIR, TRPL and EPR.Results & DiscussionSmaller nanoscale morphology and larger specific surface area for g‐C3N4/ZrO2 photocatalyst are confirmed by SEM and BET results. Photoelectrochemical experiments indicate that charge transfer process is significantly improved and bigger photogenerated current is achieved. Electron paramagnetic resonance results also show that •O2 signal is enhanced obviously with ZrO2 nanoparticles under light condition. Time‐resolved photoluminescence spectra further explain that ZrO2 is favorable for charge transfer with shortened exciton lifetime while unfavorable for charge transport with shortened recombination lifetime.ConclusionFinally, the compromise photodegradation performance of g‐C3N4/ZrO2 for tetracycline is enhanced by 70% compared with pure g‐C3N4.
Funder
Natural Science Foundation of Hainan Province