Electrochemical synthesis of perovskite LaFeO<sub>3</sub> nanoparticle-modified TiO<sub>2</sub> nanotube arrays for enhanced visible-light photocatalytic activity

Cheng, Gong; Zhang, Ze-Yang; Lin, Sheng; Wu, Zhiyuan; Sun, Lin; Ye, Chenqing; Hu, Yan-Ling; Lin, Changjian

doi:10.1039/c9nj03908b

Cited by 21 publications

(10 citation statements)

References 55 publications

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“…The quite narrow band gap exhibited by the LFO NPs comparative to binary metal oxides such as TiO 2 and SiO 2 (having approximate E g value greater than 3 eV) offers the advantage of absorption of visible light. [77,78] In other words, we can say that because of the decreased band gap between the valence band and conduction band in case of LFO, the absorption of photons will resulted into the generation of more number of defected states, as a result of which better photocatalytic activity will be exhibited by LFO. [79]…”

Section: Optical Properties Of Lfo Npsmentioning

confidence: 99%

Autocombustion‐Promoted Synthesis of Lanthanum Iron Oxide: Application as Heterogeneous Catalyst for Synthesis of Piperidines, Substituted Amines and Light‐Assisted Degradations

Pratibha

Rajput

2020

ChemistrySelect

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An autocombustion technique was adopted to synthesize the Perovskite structured Lanthanum iron oxide nanoparticles (LaFeO3, abbreviated as LFO NPs). This technique offered lots of benefits such as short reaction time along with quick heating rate. LFO NPs were fabricated at different calcination temperatures (300‐800 °C) through the aid of sucrose as chelating agent. The prepared LFO NPs were well characterized by various techniques like X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), Vibrating sample magnetometer (VSM), Ultraviolet‐Visible spectroscopy (UV‐Vis), Brunauer–Emmett–Teller (BET), X‐ray Photo‐Electron Spectroscopy (XPS) and Transmission electron microscopy (TEM) which affirmed that highly crystalline LFO NPs were obtained at 700 °C. Subsequently, the catalytic activity of the LFO NPs was surveyed for three independent approaches: (i) for the synthesis of functionalized piperidines through activation of carbonyl groups in the reacting partners (ii) for the sunlight‐assisted mineralization of health hazardous food colorant, Allura Red AC (iii) for the hydrogenation of nitro aromatic compounds (NACs) using NaBH4 (sodium borohydride) as source of hydrogen in aqueous medium at room temperature.

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Section: Optical Properties Of Lfo Npsmentioning

confidence: 99%

Autocombustion‐Promoted Synthesis of Lanthanum Iron Oxide: Application as Heterogeneous Catalyst for Synthesis of Piperidines, Substituted Amines and Light‐Assisted Degradations

Pratibha

Rajput

2020

ChemistrySelect

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“…Heterostructured catalysts associating LaFeO 3 to reduced graphene oxide [31], TiO 2 [32,33] or graphitic carbon nitride (g-C 3 N 4 ) [34][35][36][37][38][39][40][41] have received a much higher interest due to the improved separation of charge carriers. The organic g-C 3 N 4 semiconductor is a highly promising material for photocatalytic applications like H 2 production, environmental remediation or CO 2 reduction into fuel molecules due to its low cost, its high thermal and chemical stability and its relatively low bandgap of ca.…”

Section: Introductionmentioning

confidence: 99%

Heterostructured thin LaFeO3/g-C3N4 films for efficient photoelectrochemical hydrogen evolution

Guigoz

Balan

Aboulaich

et al. 2020

International Journal of Hydrogen Energy

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The deposition of LaFeO 3 at the surface of a graphitic carbon nitride (g-C 3 N 4 ) film via magnetron sputtering followed by oxidation for photoelectrochemical (PEC) water splitting is reported. The LaFeO 3 /g-C 3 N 4 film was investigated by various characterization techniques including SEM, XRD, Raman spectroscopy, XPS and photo-electrochemical measurements.Our results show that the hydrogen production rate of a g-C 3 N 4 film covered by a LaFeO 3 film, exhibiting both a thickness of ca. 50 nm, is of 10.8 μmol.h -1 .cm -2 under visible light irradiation. This value is ca. 70% higher than that measured for pure LaFeO 3 and g-C 3 N 4 films and confirms the effective separation of electron-hole pairs at the interface of LaFeO 3 /g-C 3 N 4 films. Moreover, the LaFeO 3 /g-C 3 N 4 films were demonstrated to be stable and retained a high activity (ca. 70%) after the third reuse.

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“…The formation of heterojunction between LaFeO 3 and TiO 2 leads to Fermi energy level apt to align in equilibrium and built-in an electric field at the interface of heterojunction. In the degradation mechanism, under visible light irradiation, the photogenerated electrons are transferred from the CB of LaFeO 3 to the CB of TiO 2 that reduces the recombination rate of charge carriers [17]. 3.2 at.% Ti substitution in LaFeO 3 leads to the 100% total organic carbon (TOC) removal from the 4-chloro phenol aqueous solution under UV-A light irradiation [25].…”

Section: Abo 3 Type Perovskitesmentioning

confidence: 99%

“…The photocatalytic activity of perovskite material may be tuned in different ways of design due to their chemical stability and band structure characteristics [13,15,16]. The band gap of perovskite can be modified by the replacement of 'A' or 'B' or 'O' atoms or introduction of different kind atoms [14,17].…”

Section: Introductionmentioning

confidence: 99%

Perovskite Based Photocatalyst for Wastewater Treatment: Green Approach of Environmental Sustainability

Das¹,

Mahata²,

Adak³

2021

AJBES

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Persistent organic substances in wastewater are creating serious problems to the living world as well as to the environment, thereby creating huge detrimental impact on the ecosystem. In view of the grave situation, removal of the persistent organic substances from wastewater effluent holds a great promise to balance the ecosystem and to sustain societal impact value. In this respect, perovskite based photocatalysts have achieved remarkable attention to the scientific community due to their unique structural features and flexibility of composition. Again, surface polarization and electric dipole-dipole interaction in the perovskite material make them attractive for photocatalytic application. This review paper summarized the photocatalytic activity of perovskite materials and their modification to enhance catalytic activity for wastewater treatment. The modification in perovskite has been done to reduce bandgap energy for enhanced visible light activity, separation of charge carriers for their long lifetime, and fast photocatalytic reaction. The recent investigation of ABO 3 type perovskite, layered perovskite, and halide type of perovskite photocatalysts have been discussed detailly. The modification of corresponding perovskites by doped and formation of heterojunction is investigated carefully. The formation and identification of reactive oxygen species (ROS) and their degradation mechanism by trapping experiment and ESR technique has been summarized here. Finally, large scale with energy and environmental related research should be processed for a permanent solution of wastewater problem.

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Electrochemical synthesis of perovskite LaFeO₃ nanoparticle-modified TiO₂ nanotube arrays for enhanced visible-light photocatalytic activity

Abstract: LaFeO3/TiO2 NTAs was synthesized by an electrochemical method and exhibited enhanced visible-light photocatalytic activity and excellent photochemical stability.

Cited by 21 publications

References 55 publications

Autocombustion‐Promoted Synthesis of Lanthanum Iron Oxide: Application as Heterogeneous Catalyst for Synthesis of Piperidines, Substituted Amines and Light‐Assisted Degradations

Autocombustion‐Promoted Synthesis of Lanthanum Iron Oxide: Application as Heterogeneous Catalyst for Synthesis of Piperidines, Substituted Amines and Light‐Assisted Degradations

Heterostructured thin LaFeO3/g-C3N4 films for efficient photoelectrochemical hydrogen evolution

Perovskite Based Photocatalyst for Wastewater Treatment: Green Approach of Environmental Sustainability

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Electrochemical synthesis of perovskite LaFeO3 nanoparticle-modified TiO2 nanotube arrays for enhanced visible-light photocatalytic activity

Abstract: LaFeO3/TiO2 NTAs was synthesized by an electrochemical method and exhibited enhanced visible-light photocatalytic activity and excellent photochemical stability.

Cited by 21 publications

References 55 publications

Autocombustion‐Promoted Synthesis of Lanthanum Iron Oxide: Application as Heterogeneous Catalyst for Synthesis of Piperidines, Substituted Amines and Light‐Assisted Degradations

Autocombustion‐Promoted Synthesis of Lanthanum Iron Oxide: Application as Heterogeneous Catalyst for Synthesis of Piperidines, Substituted Amines and Light‐Assisted Degradations

Heterostructured thin LaFeO3/g-C3N4 films for efficient photoelectrochemical hydrogen evolution

Perovskite Based Photocatalyst for Wastewater Treatment: Green Approach of Environmental Sustainability

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Electrochemical synthesis of perovskite LaFeO₃ nanoparticle-modified TiO₂ nanotube arrays for enhanced visible-light photocatalytic activity