Core–shell defective TiO<sub>2</sub> nanoparticles by femtosecond laser irradiation with enhanced photocatalytic performance

Azer, Bersu Bastug; Gulsaran, Ahmet; Pennings, Joel R.; Karimi, Reza; Belgabad, Aydin Ashrafi; Xu, Alexander H.; Zaidan, Liena; Kocer, Samed; Sanderson, Joseph; Bajcsy, Michal; Pope, Michael A.; Yavuz, Mustafa

doi:10.1039/d3ma00019b

Cited by 3 publications

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References 64 publications

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“…The area ratio of Ti p3/2 to Ti 2p1/2 peaks is approximately 2:1, constituting 67.4% and 32.6% of the sum level, signifying the characteristic Ti 4+ ─O bonds in TiO 2 . [ 40 ] In the O 1s spectrum, peaks at 530.1, 531.8, and 533.3 eV correspond to crystal lattice oxygen, oxygen vacancy, and surface‐adsorbed oxygen, respectively (Figure 1l, right). The area of the peak associated with oxygen vacancy is 27.4%.…”

Section: Resultsmentioning

confidence: 99%

Heterostructure of Reduced Titanium Dioxide Nanorods and Small Molecules Leads to Photo‐Induced Negative Differential Resistance Behaviors

Lee,

Han,

Lee

et al. 2024

Advanced Optical Materials

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Negative differential resistance (NDR) is of considerable interest due to the uncommon characteristic of having a region where the current decreases as the applied voltage bias increases. However, it is difficult to reproduce NDR devices and evaluate their reliability and stability because of the unstable NDR behaviors. In this paper, a highly stable photo‐induced hybrid photonic (HP)‐NDR device is presented for practical applications, which has heterostructure between TiO2‐x nanorods formed by oblique angle deposition and dinaphtho[2,3‐b:2′,3′‐f]‐thieno[3,2‐b]thiophene. The mechanism of NDR behaviors is investigated through morphological analysis, energy band structure, and electrical characteristics. In addition, diverse bias stress and endurance measurements are performed to demonstrate the reliability of the HP‐NDR device. As a result, the NDR behavior lasts up to 1,000 s in each bias stress and 38,850 cycles in the repeated current–voltage (I–V) characteristics Thus, the study has successfully achieved robust HP‐NDR devices with potential for practical applications.

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Section: Resultsmentioning

confidence: 99%

Heterostructure of Reduced Titanium Dioxide Nanorods and Small Molecules Leads to Photo‐Induced Negative Differential Resistance Behaviors

Lee,

Han,

Lee

et al. 2024

Advanced Optical Materials

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Design of “green” plasmonic nanocomposites with multi-band blue emission for ultrafast laser hyperthermia

Ryabchikov

2024

Nanoscale

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Femtosecond laser irradiation as a novel method for nanosheet growth and defect generation in g-C₃N₄

et al. 2023

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Among the many recently developed photo-catalytic materials, graphitic carbon nitride (g-C3N4) shows great promise as a catalytic material for water split-ting, hydrogen generation, and related catalytic applications. Herein, synthesized bulk g-C3N4 is simply irradiated under a 35 fs pulse at mixed photon energies (800 nm and its second harmonic). g-C3N4 was synthesized from melamine following a facile thermal polymerization procedure. The prepared material was introduced, in an aqueous environment, to thefemtosecond laser for various lengths of time. The treated material demonstrates a significant increase in surface area, relative to the untreated samples, indicating that irradiation is a successful method for exfoliation. The subsequent characterization reveals that the mixed irradiation process drives significant defect generation and sheet growth, which is not seen under 800 nm irradiation. Extendedmixed irradiation results in 4 nm thick nanosheets with lateral dimensions 4x that of the bulk material. The treated material shows improved dye absorption/removal. This novel method of defect generation and nanosheet growth shows great potentialas a g-C3N4 pre-treatment method for co-catalytic applications.

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Core–shell defective TiO₂ nanoparticles by femtosecond laser irradiation with enhanced photocatalytic performance

Abstract: Engineering defects in titanium dioxide (TiO2) are becoming increasingly important to enhance its photocatalytic performance by increasing active sites and lowering its band gap from the UV towards the visible...

Cited by 3 publications

References 64 publications

Heterostructure of Reduced Titanium Dioxide Nanorods and Small Molecules Leads to Photo‐Induced Negative Differential Resistance Behaviors

Heterostructure of Reduced Titanium Dioxide Nanorods and Small Molecules Leads to Photo‐Induced Negative Differential Resistance Behaviors

Design of “green” plasmonic nanocomposites with multi-band blue emission for ultrafast laser hyperthermia

Femtosecond laser irradiation as a novel method for nanosheet growth and defect generation in g-C₃N₄

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Core–shell defective TiO2 nanoparticles by femtosecond laser irradiation with enhanced photocatalytic performance

Abstract: Engineering defects in titanium dioxide (TiO2) are becoming increasingly important to enhance its photocatalytic performance by increasing active sites and lowering its band gap from the UV towards the visible...

Cited by 3 publications

References 64 publications

Heterostructure of Reduced Titanium Dioxide Nanorods and Small Molecules Leads to Photo‐Induced Negative Differential Resistance Behaviors

Heterostructure of Reduced Titanium Dioxide Nanorods and Small Molecules Leads to Photo‐Induced Negative Differential Resistance Behaviors

Design of “green” plasmonic nanocomposites with multi-band blue emission for ultrafast laser hyperthermia

Femtosecond laser irradiation as a novel method for nanosheet growth and defect generation in g-C3N4

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Product

Resources

About

Core–shell defective TiO₂ nanoparticles by femtosecond laser irradiation with enhanced photocatalytic performance

Femtosecond laser irradiation as a novel method for nanosheet growth and defect generation in g-C₃N₄