Preparation of N-doped and oxygen-deficient TiO2 microspheres via a novel electron beam-assisted method

Pu, Xianjuan; Hu, Yiyang; Cui, Shi‐Cong; Cheng, Lingli; Jiao, Zheng

doi:10.1016/j.solidstatesciences.2017.06.001

Cited by 12 publications

(6 citation statements)

References 46 publications

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“…Among them, the presence of N-6, N-5, and N-Q indicates the successful doping of N atoms into the graphene structure, while the weak Ti–N–Ti peak at 396.0 eV indicates the doping of trace N atoms into the anatase TiO 2 lattice; based on the peak area, the nitrogen content doped in TiO 2 is approximately 30.61%. The O 1s XPS spectrum of NT-NSG-140 (Figure d) clearly shows that the Ti–O group (TiO 2 , 529.8 eV), −OH groups (531.2 eV), and Ti–O groups (Ti 2 O 3 , 532.6 eV) are the three characteristic peaks indicating the presence of Ti 2 O 3 and the formation of oxygen vacancies in the composites …”

Section: Resultsmentioning

confidence: 99%

“…The specific surface area of the sample exhibits a decreasing trend after electron beam irradiation, which may have destroyed the structure of the graphene and caused stacking, which worsened as the dose is increased. 33 The N 2 34 As shown in Figure 3e, the high-resolution spectrum of S 2p is fitted with three peaks, C−S−C (S 2p 3/2) at 162.7 eV, C−S− C (S 2p 1/2) at 164.2 eV, and C−SO X −C (X = 2, 3, 4) at 167.7 eV, indicating the successful doping of S atoms into the graphene lattice. Figure 3f shows the Ti 2p high-resolution spectrum, and typical characteristic peaks of Ti 2p can be observed at binding energies of 464.0 and 458.3 eV, which agree with Ti 2p 1/2 and Ti 2p 3/2 .…”

Section: Effect Of Composition On Electrochemicalmentioning

confidence: 99%

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Heteroatom Modified TiO₂/Graphene Aerogel Composites by Electron Beam Irradiation in Supercapacitors

Qiao

Luo

et al. 2023

ACS Appl. Nano Mater.

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Heteroatom doping is an effective way to generate oxygen vacancies and improve the electrochemical properties of materials. However, the heteroatom doping process is more complicated and it is difficult to ensure the simultaneous generation of defects. In this work, TiO2 quantum dots/graphene aerogel composites were synthesized via a simple hydrothermal method. The N and S atoms were successfully incorporated by electron beam irradiation, and a large number of defects were introduced. The effects of irradiation dose on the doping amount, elemental morphology, and electrochemical properties of the compounds were further studied. The synergistic effect between graphene’s double-layer capacitance and TiO2 quantum dots’ pseudocapacitance, as well as the introduction of heteroatomic doping and defects, is beneficial to improve the electrochemical performance of the material. When used as an electrode material for supercapacitors, NT-NSG-140 at an irradiation dose of 140 kGy shows the best electrochemical performance. At a high current density of 5 A g–1, the NT-NSG-140 maintains a capacity of 127.8 F g–1. This work provides an environmentally friendly, simple, and efficient method for designing high-performance materials containing heteroatoms.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Composition On Electrochemicalmentioning

confidence: 99%

Heteroatom Modified TiO₂/Graphene Aerogel Composites by Electron Beam Irradiation in Supercapacitors

Qiao

Luo

et al. 2023

ACS Appl. Nano Mater.

Self Cite

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“…The major O1s peak at the binding energy of 529.7 is originated from the Ti-O bonds in the TiO 2 lattice and the middle peak at binding energy of 530.9 eV could be attributed to titanium oxynitride phase, while the other minor peak at 532.8 eV can be assigned to the surface adventitious species such as oxygen in carbonate, hydroxides and water adsorbed on the catalyst surface during the sample characterization [18,33]. The deconvolution of N1s region in Figure 6c indicated two peaks at the binding energies of 399.1 eV and 401.7 eV which the first one at 399.1 eV could be ascribed to the N atoms located at the interstitial sites of the TiO 2 lattice as the Ti-O-N and/or Ti-N-O bonds [19,34,35] and the peak at 401.7 eV could be attributed to the nitrogen atoms that molecularly chemisorbed on the sample [18,33]. The atomic percentage of nitrogen content obtained by XPS analysis was 5.6%.…”

Section: Characterization Of Photocatalystsmentioning

confidence: 98%

Comparing Photocatalytic Degradation of Gaseous Ethylbenzene Using N-doped and Pure TiO2 Nano-Catalysts Coated on Glass Beads under Both UV and Visible Light Irradiation

Kamaei

Rashedi

Dastgheib³

et al. 2018

Catalysts

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Volatile Organic Compounds (VOCs) are within the main industrial air pollutants whose release into the atmosphere is harmful to the ecosystem and human health. Gas-phase photocatalytic degradation of ethylbenzene, an aromatic VOC emitted from various sources, has been investigated in this study using TiO2 nanoparticle-coated glass beads in an annular photoreactor. To use visible light irradiation, TiO2 nanoparticles were doped by nitrogen using urea. The results showed that nitrogen doping significantly increased the removal efficiency of ethylbenzene under visible light irradiation compared with the pure TiO2, so that the removal efficiencies between 75–100% could be yielded for the initial ethylbenzene concentrations up to 0.13 g/m3 under visible light which could be useful for improving indoor air quality. The UV irradiated reactor needed less residence time and much higher removal efficiencies could be yielded at high initial concentrations. When the residence time under UV irradiation was one third of the same under visible light, the removal efficiency was more than 80% for the inlet concentrations up to 0.6 g/m3, whereas the removal efficiency under visible light was about 25% at this inlet concentration. Langmuir-Hinshelwood kinetic model could be well fitted to the photocatalytic reaction in both irradiation systems.

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“…Challenges of Bulk Nitrogen Doping: nitrogen doping in solid TiO 2 structures is hindered because of compact packing in Figure 2b [87].…”

Section: Unlocking Nitrogen Doping Potentialmentioning

confidence: 99%

“…Advantages of Mesoporous Nitrogen Doping: mesoporous TiO 2 with nitrogen doping exhibits uniform energy levels, enhancing the visible-light photocatalytic activity [87].…”

Section: Unlocking Nitrogen Doping Potentialmentioning

confidence: 99%

Introduction and Advancements in Room-Temperature Ferromagnetic Metal Oxide Semiconductors for Enhanced Photocatalytic Performance

Sundaram,

Muniyandi,

Ethiraj

et al. 2024

ChemEngineering

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Recent advancements in the field of room-temperature ferromagnetic metal oxide semiconductors (RTFMOS) have revealed their promising potential for enhancing photocatalytic performance. This review delves into the combined investigation of the photocatalytic and ferromagnetic properties at room temperature, with a particular focus on metal oxides like TiO2, which have emerged as pivotal materials in the fields of magnetism and environmental remediation. Despite extensive research efforts, the precise mechanism governing the interplay between ferromagnetism and photocatalysis in these materials remains only partially understood. Several crucial factors contributing to magnetism, such as oxygen vacancies and various metal dopants, have been identified. Numerous studies have highlighted the significant role of these factors in driving room-temperature ferromagnetism and photocatalytic activity in wide-bandgap metal oxides. However, establishing a direct correlation between magnetism, oxygen vacancies, dopant concentration, and photocatalysis has posed significant challenges. These RTFMOS hold immense potential to significantly boost photocatalytic efficiency, offering promising solutions for diverse environmental- and energy-related applications, including water purification, air pollution control, and solar energy conversion. This review aims to offer a comprehensive overview of recent advancements in understanding the magnetism and photocatalytic behavior of metal oxides. By synthesizing the latest findings, this study sheds light on the considerable promise of RTFMOS as effective photocatalysts, thus contributing to advancements in environmental remediation and related fields.

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Preparation of N-doped and oxygen-deficient TiO2 microspheres via a novel electron beam-assisted method

Cited by 12 publications

References 46 publications

Heteroatom Modified TiO₂/Graphene Aerogel Composites by Electron Beam Irradiation in Supercapacitors

Heteroatom Modified TiO₂/Graphene Aerogel Composites by Electron Beam Irradiation in Supercapacitors

Comparing Photocatalytic Degradation of Gaseous Ethylbenzene Using N-doped and Pure TiO2 Nano-Catalysts Coated on Glass Beads under Both UV and Visible Light Irradiation

Introduction and Advancements in Room-Temperature Ferromagnetic Metal Oxide Semiconductors for Enhanced Photocatalytic Performance

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Preparation of N-doped and oxygen-deficient TiO2 microspheres via a novel electron beam-assisted method

Cited by 12 publications

References 46 publications

Heteroatom Modified TiO2/Graphene Aerogel Composites by Electron Beam Irradiation in Supercapacitors

Heteroatom Modified TiO2/Graphene Aerogel Composites by Electron Beam Irradiation in Supercapacitors

Comparing Photocatalytic Degradation of Gaseous Ethylbenzene Using N-doped and Pure TiO2 Nano-Catalysts Coated on Glass Beads under Both UV and Visible Light Irradiation

Introduction and Advancements in Room-Temperature Ferromagnetic Metal Oxide Semiconductors for Enhanced Photocatalytic Performance

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Product

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About

Heteroatom Modified TiO₂/Graphene Aerogel Composites by Electron Beam Irradiation in Supercapacitors

Heteroatom Modified TiO₂/Graphene Aerogel Composites by Electron Beam Irradiation in Supercapacitors