Enhanced Visible Light Driven Photocatalytic Behavior of BiFeO3/Reduced Graphene Oxide Composites

Si, Yunhui; Xiao, Yu; Shang, Shao-ke; Xiong, Xinbo; Zeng, Xierong; Zhou, Ji; Li, Yayun

doi:10.3390/nano8070526

Cited by 61 publications

(30 citation statements)

References 47 publications

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“…It has been reported that the super-exchange interaction between Fe 3p and O 2p ions plays an important role in the ferromagnetic properties of BFO. The ferroelectric properties stem from the off-center displacement of 6 s2 lone pair electrons of Bi 3+ ions [ 6 , 7 ]. Meanwhile, the potential magnetoelectric coupling effect in BFO has also attracted much attention [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Magnetic Properties of Co-Doped BiFeO3 Thin Films via Structural Progression

Bai

Sun

et al. 2020

Nanomaterials

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Co3+ doping in BiFeO3 is expected to be an effective method for improving its magnetic properties. In this work, pristine BiFeO3 (BFO) and doped BiFe1-xCoxO3 (BFCxO, x = 0.01, 0.03, 0.05, 0.07 and 0.10) composite thin films were successfully synthesized by a sol–gel technique. XRD and Raman spectra indicate that the Co3+ ions are substituted for the Fe3+ ion sites in the BFO rhombohedral lattice. Raman vibration of oxygen octahedron is obviously weakened due to the lattice distortion induced by the size mismatch between two B-site cations (Fe3+ and Co3+ ions), which has an impact on the magnetic properties of BFCxO. SEM images reveal a denser agglomeration in Co-doped samples. TEM results indicate that the average size of grains is reduced due to the Co3+ substitution. XPS measurements illustrate that the replacement of Fe3+ with Co3+ effectively suppresses the generation of oxygen defects and increases the concentration of Fe3+ ions at the B-site of perovskite lattice. Vibrating sample magnetometer (VSM) measurements show that the remanent magnetization (Mr) of BFC0.07O (3.6 emu/cm3) and the saturation magnetization (Ms) of BFC0.10O (48.84 emu/cm3) thin film both increase by approximately two times at room temperature, compared with that of the pure BFO counterpart.

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Section: Introductionmentioning

confidence: 99%

Enhanced Magnetic Properties of Co-Doped BiFeO3 Thin Films via Structural Progression

Bai

Sun

et al. 2020

Nanomaterials

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“…Our results are in good agreement with previous results reported in the literature concerning photocatalytic degradation efficiency of MFO/rGO composite layers. The inclusion of rGO improved the photocatalytic activity, demonstrating considerably better degradation of methylene blue [77] or Rhodamine B [20] dye molecules and higher hydrogen production by water-splitting, as compared to pure BiFeO 3 [77]. The photocatalytic properties of the LFO/rGO composite photocatalyst containing 5 wt.% rGO, with the highest degradation efficiency under UV light irradiation, were also tested during visible light irradiation (Figure 8).…”

Section: Photocatalytic Degradation Of Methyl Orangementioning

confidence: 99%

Enhanced UV-Vis Photodegradation of Nanocomposite Reduced Graphene Oxide/Ferrite Nanofiber Films Prepared by Laser-Assisted Evaporation

et al. 2020

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Nanocomposite films of rGO/MFeO3 (M = Bi, La) nanofibers were grown by matrix-assisted pulsed laser evaporation of frozen target dispersions containing GO platelets and MFeO3 nanofibers. Electron microscopy investigations confirmed the successful fabrication of MFeO3 nanofibers by electrospinning Part of nanofibers were broken into shorter units, and spherical nanoparticles were formed during laser processing. Numerical simulations were performed in order to estimate the maximum temperature values reached by the nanofibers during laser irradiation. X-ray diffraction analyses revealed the formation of perovskite MFeO3 phase, whereas secondary phases of BiFeO3 could not be completely avoided, due to the high volatility of bismuth. XPS measurements disclosed the presence of metallic bismuth and Fe2+ for BiFeO3, whereas La2(CO3)3 and Fe2+ were observed in case of LaFeO3 nanofibers. High photocatalytic efficiencies for the degradation of methyl orange were achieved for nanocomposite films, both under UV and visible light irradiation conditions. Degradation values of up to 70% after 400 min irradiation were obtained for rGO/LaFeO3 nanocomposite thin layers, with weights below 10 µg, rGO platelets acting as reservoirs for photoelectrons generated at the surface of MFeO3.

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“…Photocatalytic technology has been used as a kind of green environmental treatment. However, the use of semiconductor photocatalytic materials such as TiO 2 and ZnO can only be used in the UV light only accounted for less than 5% parts of the solar light [3,4]. The exploring of visible-light photocatalytic materials is a hotspot among materials and chemical scientists.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation and Enhanced Visible-Light Photocatalysis of ZnO Arrays@BiOI Nanosheets Heterostructures

Zhang

Wang

Liang

et al. 2019

Journal of Nanomaterials

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A simple two-step method of growing ZnO nanorod arrays on the surface of BiOI nanosheets was developed under mild environment. The hierarchical structure of ZnO arrays@BiOI nanosheets was characterized by various measurements like X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray detector. The optical absorption of the ZnO arrays@BiOI nanosheets composite was investigated by UV-Vis diffuse reflectance spectra. The photocatalytic degradation of methanol orange under visible light shows that the obtained ZnO arrays@BiOI nanosheets heterostructures exhibit enhanced photocatalytic activity, contrasting to the sum of BiOI nanosheets and ZnO nanorods. The mechanism of the photocatalytic process was discussed. This method of growing ZnO nanorod arrays on other nanosheets also provides a potential method to fabricating other complex structures.

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Enhanced Visible Light Driven Photocatalytic Behavior of BiFeO3/Reduced Graphene Oxide Composites

Cited by 61 publications

References 47 publications

Enhanced Magnetic Properties of Co-Doped BiFeO3 Thin Films via Structural Progression

Enhanced Magnetic Properties of Co-Doped BiFeO3 Thin Films via Structural Progression

Enhanced UV-Vis Photodegradation of Nanocomposite Reduced Graphene Oxide/Ferrite Nanofiber Films Prepared by Laser-Assisted Evaporation

Facile Preparation and Enhanced Visible-Light Photocatalysis of ZnO Arrays@BiOI Nanosheets Heterostructures

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