Synthesis of Pt/BiFeO3 heterostructured photocatalysts for highly efficient visible-light photocatalytic performances

Niu, Feng; Chen, Da; Qin, Laishun; Gao, Tong; Zhang, Ning; Wang, Sen; Chen, Zhi; Wang, Jiangying; Sun, Xingguo; Huang, Yuexiang

doi:10.1016/j.solmat.2015.07.008

Cited by 132 publications

(34 citation statements)

References 64 publications

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“…4(a) . The two characteristic peaks for Bi 4f appeared at around 158.5 eV and 163.8 eV corresponding to Bi 4f 7/2 and Bi 4f 5/2 , respectively, indicating that bismuth existed in the form of Bi 3+ in the Gd-doped BFO 22 . As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhanced visible light photocatalytic activity of Gd-doped BiFeO3 nanoparticles and mechanism insight

Zhang

Chen

Niu

et al. 2016

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To investigate the effect of Gd doping on photocatalytic activity of BiFeO3 (BFO), Gd-doped BFO nanoparticles containing different Gd doping contents (Bi(1−x)GdxFeO3, x = 0.00, 0.01, 0.03, 0.05) were synthesized using a facile sol-gel route. The obtained products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectra, and ultraviolet-visible diffuse reflectance spectroscopy, and their photocatalytic activities were evaluated by photocatalytic decomposition of Rhodamine B in aqueous solution under visible light irradiation. It was found that the Gd doping content could significantly affect the photocatalytic activity of as-prepared Gd-doped BFO, and the photocatalytic activity increased with increasing the Gd doping content up to the optimal value and then decreased with further enhancing Gd doping content. To elucidate the enhanced photocatalytic mechanism of Gd-doped BFO, the trapping experiments, photoluminescence, photocurrent and electrochemical impedance measurements were performed. On the basis of these experimental results, the enhanced photocatalytic activities of Gd-doped BFO could be ascribed to the increased optical absorption, the efficient separation and migration of photogenerated charge carriers as well as the decreased recombination probability of electron-hole pairs derived from the Gd doping effect. Meanwhile, the possible photocatalytic mechanism of Gd-doped BFO was critically discussed.

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Section: Resultsmentioning

confidence: 99%

Enhanced visible light photocatalytic activity of Gd-doped BiFeO3 nanoparticles and mechanism insight

Zhang

Chen

Niu

et al. 2016

Sci Rep

Self Cite

232

108

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“…The distance difference of these two peaks is 5.3 eV, indicating that bismuth is mainly in the form of Bi 3+ . [ 34 ] No significant change of Bi 4f 7/2 and Bi 4f 5/2 binding energies after RuO 2 loading is indication that the valance state of Bi is not affected by RuO 2 . Figure 3c shows Fe 2p XPS spectra of BFO before and after RuO 2 loading.…”

Section: Resultsmentioning

confidence: 99%

Regulation of Ferroelectric Polarization to Achieve Efficient Charge Separation and Transfer in Particulate RuO₂/BiFeO₃ for High Photocatalytic Water Oxidation Activity

Shah

Huang

Idris

et al. 2020

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Exploiting spontaneous polarization of ferroelectric materials to achieve high charge separation efficiency is an intriguing but challenging research topic in solar energy conversion. This work shows that loading high work function RuO2 cocatalyst on BiFeO3 (BFO) nanoparticles enhances the intrinsic ferroelectric polarization by efficient screening of charges to RuO2 via RuO2/BFO heterojunction. This leads to enhancement of the surface photovoltage of RuO2/BFO single nanoparticles nearly 3 times, the driving force for charge separation and transfer in photocatalytic reactions. Consequently, efficient photocatalytic water oxidation is achieved with quantum efficiency as high as 5.36 % at 560 nm, the highest activity reported so far for ferroelectric materials. This work demonstrates that, unlike low photocurrent density in film‐based ferroelectric devices, high photocatalytic activity could be achieved by regulating the ferroelectric spontaneous polarization using appropriate cocatalyst to enhance driving force for efficient separation and transfer of photogenerated charges in particulate ferroelectric semiconductor materials.

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“…BFO nanoparticle is a semiconductor material capable of displaying potential applications in piezoelectric devices, sensors, photosensitizers, and spintronics (Zhao et al, 2008;Zeches et al, 2009;Yu et al, 2009;Jiang et al, 2011). The material has a narrow bandgap of about 2.2 eV compared to the widely used TiO 2 with energy bandgap of 3.2 eV (Niu et al, 2015a). A narrow bandgap provides the possibility of using a large portion of visible light from the total solar energy.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic activity and doping effects of BiFeO3 nanoparticles in model organic dyes

Haruna

Abdulkadir

Idris

2020

Heliyon

118

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The studies of advanced materials in environmental remediation and degradation of pollutants is rapidly advancing because of their wide varieties of applications. BiFeO 3 (BFO), a perovskite nanomaterial with a rhombohedral R3c space group, is currently receiving tremendous attention in photodegradation of dyes. The photocatalytic activity of BFO nanoparticle is a promising field of research in photocatalysis. BFO nanomaterial is a photocatalyst enhanced by doping because of its reduce bandgap energy (2.0-2.77 eV), multiferroic property, strong photoabsorption and crystal structure. The material has proven to be very useful for the degradation of dyes under visible light irradiation among other photocatalysts. Its exceptional nontoxicity, suitability, low cost and long term excellent stability makes it an efficient photocatalyst for the degradation of effluents from textile and pharmaceutical industries which ended-up in the environment and now a major concern of the modern world. This mini-review attempts to provide some detailed synthetic routes of BFO and BFO related nanomaterials and the notable achievements so far on the effect of doping the material. It also discusses the effect of crystallite size of the material and other photophysical properties and how they influence the photocatalytic process of model organic dye pollutants, to date.

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Synthesis of Pt/BiFeO3 heterostructured photocatalysts for highly efficient visible-light photocatalytic performances

Cited by 132 publications

References 64 publications

Enhanced visible light photocatalytic activity of Gd-doped BiFeO3 nanoparticles and mechanism insight

Enhanced visible light photocatalytic activity of Gd-doped BiFeO3 nanoparticles and mechanism insight

Regulation of Ferroelectric Polarization to Achieve Efficient Charge Separation and Transfer in Particulate RuO₂/BiFeO₃ for High Photocatalytic Water Oxidation Activity

Photocatalytic activity and doping effects of BiFeO3 nanoparticles in model organic dyes

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Synthesis of Pt/BiFeO3 heterostructured photocatalysts for highly efficient visible-light photocatalytic performances

Cited by 132 publications

References 64 publications

Enhanced visible light photocatalytic activity of Gd-doped BiFeO3 nanoparticles and mechanism insight

Enhanced visible light photocatalytic activity of Gd-doped BiFeO3 nanoparticles and mechanism insight

Regulation of Ferroelectric Polarization to Achieve Efficient Charge Separation and Transfer in Particulate RuO2/BiFeO3 for High Photocatalytic Water Oxidation Activity

Photocatalytic activity and doping effects of BiFeO3 nanoparticles in model organic dyes

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Regulation of Ferroelectric Polarization to Achieve Efficient Charge Separation and Transfer in Particulate RuO₂/BiFeO₃ for High Photocatalytic Water Oxidation Activity