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Enhanced Visible-Light Driven Photocatalytic Performances Over LaFeO3/NiO Modified Porous g-C3N4 Nanosheets

Xu, Ke ; Yang, Xiaosheng ; Sun, Dagao ; Yang, Xin ; Zhou, Yumei ; Li, Wei ; Yang, Qindan ; Yang, Xianjiong ; Li, Rong ; Feng, Jian

NANO, 2020, 15(2), , pp.118-128 [Periódico revisado por pares]

Singapore: 성균나노과학기술원

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  • Título:
    Enhanced Visible-Light Driven Photocatalytic Performances Over LaFeO3/NiO Modified Porous g-C3N4 Nanosheets
  • Autor: Xu, Ke ; Yang, Xiaosheng ; Sun, Dagao ; Yang, Xin ; Zhou, Yumei ; Li, Wei ; Yang, Qindan ; Yang, Xianjiong ; Li, Rong ; Feng, Jian
  • Assuntos: Carbon nitride ; Charge efficiency ; Excitons ; Ferrites ; Fluorescence ; Heterojunctions ; Heterostructures ; Hydrogen evolution ; Lanthanum compounds ; Light irradiation ; Nanosheets ; Nickel oxides ; Photocatalysis ; Photodegradation ; Separation ; Solar energy ; 화학
  • É parte de: NANO, 2020, 15(2), , pp.118-128
  • Descrição: LaFeO3/NiO modified g-C3N4 nanosheets (L-N/CNS) were synthesized by a two-step method. HRTEM results showed that an intimate contact between LaFeO3, NiO and N-CNS was successfully established. Ninety percent of phenol was degraded within 120 min, and the hydrogen evolution rate of 171.2 μ mol h − 1 g − 1 was obtained over the L-N/CNS heterojunctions under the visible-light irradiation. It was higher than that of g-C3N4 nanosheets, NiO modified g-C3N4 and LaFeO3/g-C3N4. The ⋅ O 2 − radicals acted the crucial role in the photocatalytic degradation reaction. EIS, PL and time-resolved fluorescence spectra demonstrated that L-N/CNS possessed the highest charge separation efficiency. The intimate contact between LaFeO3, NiO and g-C3N4 nanosheets promoted the separation and transfer of photo-induced electron–hole pairs and consequently prolonged the exciton lifetime, and implied more photo-induced electrons could be probably involved in the photocatalytic reactions on the surface of photocatalysts. Thus, the visible-light driven photocatalytic performances of L-N/CNS were effective. This work provided a feasible method to design and construct heterostructures for the exploitation of solar energy. In this study, LaFeO3/NiO modified porous g-C3N4 nanosheets were synthesized by a two-step method. HRTEM results showed that an intimate contact between LaFeO3, NiO and N-CNS was successfully established. A total of 90% of phenol was degraded within 120 min, and the hydrogen evolution rate of 171.2 μmol h–1 g–1 was obtained over the LaFeO3/NiO modified porous g-C3N4 nanosheets heterojunctions under the visible light irradiation.
  • Editor: Singapore: 성균나노과학기술원
  • Idioma: Coreano;Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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