首页|Visible-light induced electron-transfer in MoO3 QDs/g-C3N4 nanosheets for efficient photocatalytic reduction of U(VI)
Visible-light induced electron-transfer in MoO3 QDs/g-C3N4 nanosheets for efficient photocatalytic reduction of U(VI)
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NSTL
Elsevier
? 2022Visible light-driven photocatalytic technology has become an effective method to remove U(VI) from wastewater. Herein, MoO3 quantum dots (MQDs) were prepared by a one-step oxidation method using molybdenum disulfide as the precursor. The MQDs were used to modify g-C3N4 nanosheet photocatalysts (MQDn-C3N4, where n represents the mass percentage of MQDs) to enhance the photocatalytic performance of g-C3N4 nanosheets. The morphology, chemical composition and optical properties of the MQDn-C3N4 composites were investigated by a series of characterization methods. The MQD3-C3N4 could remove 96.4% of U(VI) after 150 min of illumination, which was about 1.9 times that of g-C3N4. The MQD3-C3N4 samples had excellent stability and recyclability after five cycles. The possible mechanism of the photocatalytic process was proposed through radical trapping experiments and electron spin-resonance, in which the reduction of U(VI) is facilitated by photogenerated e– and ?O2– radicals. The MQDn-C3N4 photocatalyst is expected to provide new concepts for the treatment of wastewater containing radionuclides.
g-C3N4MoO3 quantum dotsPhotocatalyticU(VI)
Lin S.、Liu J.、Cheng Z.、Cao X.、Wang Y.、Liu Y.、Zhang Z.、Xu J.、Zhu X.、Dong Z.
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State Key Laboratory of Nuclear Resources and Environment East China University of Technology
NSTL
Elsevier
