Structures and photocatalytic activity of α-Fe2O3@TiO2 core - shell nanoparticles

Niu, Yongan; Li, Manyuan; Jia, Xueyan; Shi, Zihang; Liu, Haixiong; Zhang, Xin

doi:10.1016/j.ssc.2022.114683

Cited by 11 publications

(3 citation statements)

References 27 publications

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“…5c), 36 which is likely to play a major role in heterojunctions formed by metal oxides (especially Fe 2 O 3 ) with narrow band gaps. 51,52 In addition, carbonaceous materials can narrow the E g value of semiconductor photocatalysts due to the higher electron transfer rate and better carrier stabilizing capability. 53 The VB-XPS spectra in Fig.…”

Section: The Photocatalytic Degradation Mechanism Of the Bob/cgfs 20 ...mentioning

confidence: 99%

Ambient temperature-prepared BiOBr-supported zero-pretreatment coal gasification fine slag for organic pollutant removal

Hua,

Yang,

et al. 2024

New J. Chem.

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Section: The Photocatalytic Degradation Mechanism Of the Bob/cgfs 20 ...mentioning

confidence: 99%

Ambient temperature-prepared BiOBr-supported zero-pretreatment coal gasification fine slag for organic pollutant removal

Hua,

Yang,

et al. 2024

New J. Chem.

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“…[3] In literature, different metal oxide-based CSNPs have been reported for various applications. For example, SiO 2 /NiO CSNPs and Fe 3 O 4 @NiO for selective adsorption of toxic dyes, [4,5] ZnCo 2 O 4 @NiO, Co 3 O 4 @NiCo 2 O 4 nanowires, Fe 2 O 3 @NiCo 2 O 4 , and MnCo 2 O 4 @NiO for asymmetric supercapacitors, [6][7][8][9] Au@Co 3 O 4 and TiO 2 /SnO 2 core-shell nanorods for gas sensing applications, [10,11] TiO 2 @α-Fe 2 O 3 and α-Fe 2 O 3 @TiO 2 for photocatalytic degradation, [12,13] Fe 2 O 3 @TiO 2 and Co 3 O 4 /CoP for CO and water oxidation, [14,15] Co 3 O 4 @LaCoO 3 for water splitting, [16] SiO 2 @MnCo 2 O 4 for peroxidase-like activity, [17] TiO 2 @Ag for reduction of 4-nitrophenol, [18] and Cu x O@TiO 2 for antibacterial activity. [19] TiO 2 is a n-type semiconductor with a wide band gap of ~3.2 eV.…”

Section: Introductionmentioning

confidence: 99%

A Facile Synthetic Approach for TiO₂@NiO Core‐shell Nanoparticles using TiO₂@Ni(OH)₂ Precursors and their Photocatalytic Application

Rana,

Jeevanandam

2024

ChemNanoMat

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The current study presents a simple and an efficient chemical method for the synthesis of TiO2@NiO core‐shell nanoparticles (CSNPs) as photocatalyst for effective degradation of rhodamine B (RhB) in aqueous solution upon sunlight irradiation. First, TiO2 spheres were synthesized using a wet chemical method. Then, TiO2@Ni(OH)2 precursors were prepared via homogeneous precipitation and TiO2@NiO core‐shell nanoparticles were obtained on calcination of the precursors. The synthesized precursors and the TiO2@NiO CSNPs were analyzed using XRD, FT‐IR, FESEM and DRS. XRD data shows the presence of both TiO2 and NiO phases in the TiO2@NiO samples. FE‐SEM and TEM analyses confirm coating of NiO NPs on TiO2 spheres with varying shell thickness (40 nm to 170 nm). Optical studies reveal that TiO2@NiO CSNPs possess band gap of about ∼3.7 eV. Photoluminescence (PL) results show lower recombination rate of e− and h+ pairs in the TiO2@NiO CSNPs. XPS studies confirm the presence of different elements in the TiO2@NiO CSNPs. Magnetic investigations reveal ferromagnetic behavior of the core‐shell NPs at 5 K. The TiO2@NiO CSNPs were explored as photocatalyst for the degradation of rhodamine B in water under natural sunlight. The TiO2@NiO CSNPs exhibit better photocatalytic activity compared to TiO2 and NiO nanoparticles.

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“…In contrast, Niu et al explicated in their study that α-Fe 2 O 3 @TiO 2 core-shell nanoparticles show amplified absorption across ultraviolet and visible spectra. The remarkable catalytic efficiency of α-Fe 2 O 3 @TiO 2 is attributed to its unique core-shell structures, significant specific surface area, powerful light absorption, and the synergistic effects conferred by the heterojunction [23].…”

Section: Introductionmentioning

confidence: 99%

Stability of the TiO2 Nanuclusters Supported on Fe2O3-Hematite for Application in Electrocatalytic Water Splitting—An Insight from DFT Simulations

Dymkowski,

Żuczkowski,

Kołodziejczyk

et al. 2023

Hydrogen

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We present the analysis of the stability of the (TiO2)n nanoclusters, where n = 2–4, supported on the Fe3O3-hematite (100) surface. The analysis is focused on the size and geometry of the nanocluster, which defines the contact with the supporting hematite surface. The aim of the work is to explore the role of the interaction within the nanocluster as well as between the nanocluster and the surface in the structure of the composite system. We have used an in-house developed variant of the solids docking procedure to determine the most stable initial configurations of the nanoclusters with respect to the surface. Subsequently, we have carried out molecular dynamics simulations to enable finding a more stable configurations by the systems. The results show the three possible binding modes for the (TiO2)2 systems, but many more such modes for the larger clusters. Additionally, we have found that the partial dissociation of the nanocluster takes place upon the contact with the surface.

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Structures and photocatalytic activity of α-Fe2O3@TiO2 core - shell nanoparticles

Cited by 11 publications

References 27 publications

Ambient temperature-prepared BiOBr-supported zero-pretreatment coal gasification fine slag for organic pollutant removal

Ambient temperature-prepared BiOBr-supported zero-pretreatment coal gasification fine slag for organic pollutant removal

A Facile Synthetic Approach for TiO₂@NiO Core‐shell Nanoparticles using TiO₂@Ni(OH)₂ Precursors and their Photocatalytic Application

Stability of the TiO2 Nanuclusters Supported on Fe2O3-Hematite for Application in Electrocatalytic Water Splitting—An Insight from DFT Simulations

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Structures and photocatalytic activity of α-Fe2O3@TiO2 core - shell nanoparticles

Cited by 11 publications

References 27 publications

Ambient temperature-prepared BiOBr-supported zero-pretreatment coal gasification fine slag for organic pollutant removal

Ambient temperature-prepared BiOBr-supported zero-pretreatment coal gasification fine slag for organic pollutant removal

A Facile Synthetic Approach for TiO2@NiO Core‐shell Nanoparticles using TiO2@Ni(OH)2 Precursors and their Photocatalytic Application

Stability of the TiO2 Nanuclusters Supported on Fe2O3-Hematite for Application in Electrocatalytic Water Splitting—An Insight from DFT Simulations

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A Facile Synthetic Approach for TiO₂@NiO Core‐shell Nanoparticles using TiO₂@Ni(OH)₂ Precursors and their Photocatalytic Application