A high-performance supercapacitor based on N-doped TiO2 nanoparticles

Hodaei, Amin; Dezfuli, Amin Shiralizadeh; Naderi, Hamid Reza

doi:10.1007/s10854-018-9595-x

Cited by 31 publications

(7 citation statements)

References 33 publications

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“…32 Titanium dioxide (TiO 2 ) has been considered as a potential candidate for supercapacitor applications due to its natural abundance, low cost, and environmental friendliness. [33][34][35] Nanostructured TiO 2 is also an excellent choice as the electrode material for supercapacitor application. The nanostructured material provides enhanced surface area for the adsorption of ions on the electrode.…”

Section: Introductionmentioning

confidence: 99%

In situcarbon-supported titanium dioxide (ICS-TiO₂) as an electrode material for high performance supercapacitors

et al. 2020

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Supercapacitors have attracted significant attention in the last few years as they have the capability to fulfill the demand for both power and energy density in many energy storage applications. In this study, an in situ carbon-supported titanium oxide (ICS-TiO 2 ) electrode has been prepared using sucrose and TiO 2 powder. The ICS-TiO 2 powder was prepared by slipcasting, followed by the annealing of the TiO 2 slurry. Sucrose was added to the TiO 2 slurry as a soluble carbon source, and was converted into carbon at 600 C then coated on the TiO 2 particles. The morphological and structural evolution of the electrode was investigated by FEG-SEM, FEG-TEM, XRD, BET, FTIR, XPS and Raman spectroscopy. The electrochemical characterization of ICS-TiO 2 demonstrated that this material exhibits an efficient value of specific capacitance (277.72 F g À1 at 25 mV s À1 ) for charge storage. ISC-TiO 2 also exhibits a specific capacitance of 180 F g À1 at 2 A g À1 in a 1 M Na 2 SO 4 aqueous electrolyte. The results suggest that ICS-TiO 2 can be utilized as a highperformance electrode material for supercapacitors with desirable electrochemical properties. Fig. 3 (a) Nitrogen adsorption/desorption isotherms; (b) nitrogen desorption/desorption pore size distribution; (c) XRD pattern, (d) Raman spectra; (e) FTIR spectra of TiO 2 and ICS-TiO 2 ; (f) TGA of ICS-TiO 2 .This journal is

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Section: Introductionmentioning

confidence: 99%

In situcarbon-supported titanium dioxide (ICS-TiO₂) as an electrode material for high performance supercapacitors

et al. 2020

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Section: Introductionmentioning

confidence: 99%

“…In this context, one of the main issues currently under debate concerns the actual location of the nitrogen atoms in the TiO 2 matrix. In most of the studies, samples were analyzed by X-ray photoelectron spectroscopy (XPS); the fitting of the N 1s region is described as follows according to a very recent study: the component at ∼400 eV accounts for the molecular nitrogen (N 2 ) while components at higher binding energies correspond to oxidized nitrogen species chemisorbed on the surface, e.g., NO – or NO 2 – , generally labeled as γ-N states. , All these peaks completely disappear upon etching the surface contamination with an Ar + beam at low kinetic energy (2 kV). Furthermore, a component assigned to nitrogen bonded to titanium, generally labeled as substitutional nitrogen, is reported in the 396–398 eV range depending on the authors and is associated with the substitution of an oxygen atom by a nitrogen one. − Finally, a component around 399 eV is attributed to nitrogen in the form of a Ti–N–O or Ti–O–N bond.…”

Section: Introductionmentioning

confidence: 99%

Fine Control of the Chemistry of Nitrogen Doping in TiO₂: A Joint Experimental and Theoretical Study

Panepinto¹,

Cornil²,

Bittencourt³

et al. 2020

J. Phys. Chem. C

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N-doped TiO 2 materials have recently attracted a considerable amount of interest due to their enhanced photoelectrochemical properties compared to pristine TiO 2 . However, this improvement is still not clearly correlated to the N chemistry because the attribution of the observed components in the N 1s X-ray photoelectron spectra is strongly disputed. In this context, this joint experimental and theoretical study aims at clearly distinguishing the different N atomic species and positions that can be encountered upon N-doping of titania by the N 2 + ion implantation method. Core-level binding energy shifts (CLS) calculated at a quantum-chemical level for N 1s orbitals with different chemical environments nicely match the components obtained by the fitting of the N 1s XPS experimental regions and allow for its detailed interpretation. We also monitored the N atom positions as a function of the dose used for implantation. Based on classical simulations of ion/surface interactions achieved with the help of the TRIDYN software, we show that oxygen vacancies play a key role in defining the nitrogen doping type (i.e., nitrogen position in the TiO 2 lattice), as further supported by DFT calculations.

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“…It demonstrated that the N 1 s peak could be best fitted by the combination of two peaks located at 398.8 and 396.4 eV, respectively. The N 1 s peaks at 398.8 eV could be attributed to the N–H or adsorbed NH 3 from the post‐creation calcination under NH 3 atmosphere, while the N 1 s peak at 396.4 eV could be attributed to the substitutional nitrogen dopants which incorporated into the pristine rutile TiO 2 lattice to substitute oxygen atoms under oxygen‐deficient conditions . Figure E shows the high resolution XPS scans over O 1 s peak of the undoped and doped rutile TiO 2 ceramic 3D‐TPC samples, respectively.…”

Section: Resultsmentioning

confidence: 99%

Modulation of terahertz properties of 3D ceramic photonic crystals via post‐creation non‐metal anion doping treatment

et al. 2019

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Ceramic photonic crystals have wide application potentials for THz technology due to their characteristic strong chemical stability and high temperature resistance for demanding environment. However, it is still a challenge to modulate the THz properties of as-prepared ceramic TPCs via post-creation treatments to satisfy different application requirements. In this work, the THz properties of rutile TiO 2 ceramic 3D-TPCs were modulated by non-metal anion doping of either carbon or nitrogen, which was firstly created by the direct-writing technique with a TiO 2 sol-gel ink followed by the high temperature sintering process at 1200°C. Calcination of the pristine rutile TiO 2 ceramic 3D-TPCs in either CO or NH 3 atmosphere successfully doped either C or N dopants into rutile TiO 2 ceramic 3D-TPCs, respectively, which changed their dielectric properties and subsequently induced different THz properties on these ceramic 3D-TPCs with the same structure. Their THz properties were found to be largely affected by the specific nature of the dopant. Compared with the pristine rutile TiO 2 ceramic 3D-TPC, the bandgap positions of both C-doped and Ndoped rutile TiO 2 ceramic 3D-TPCs largely shifted toward the higher frequency, while the N-doped sample demonstrated a much broader bandgap. Thus, non-metal anion doping could be an effective post-creation approach to modulate the THz properties of ceramic TPCs. K E Y W O R D S 3D-terahertz photonic crystals, anion doping, direct-writing, rutile TiO 2 , sol-gel ink How to cite this article: Wang R, Yang W, Gao S, et al. Modulation of terahertz properties of 3D ceramic photonic crystals via post-creation non-metal anion doping treatment. J Am Ceram Soc. 2019;102:4688-4697. https://doi.

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A high-performance supercapacitor based on N-doped TiO2 nanoparticles

Cited by 31 publications

References 33 publications

In situcarbon-supported titanium dioxide (ICS-TiO₂) as an electrode material for high performance supercapacitors

In situcarbon-supported titanium dioxide (ICS-TiO₂) as an electrode material for high performance supercapacitors

Fine Control of the Chemistry of Nitrogen Doping in TiO₂: A Joint Experimental and Theoretical Study

Modulation of terahertz properties of 3D ceramic photonic crystals via post‐creation non‐metal anion doping treatment

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A high-performance supercapacitor based on N-doped TiO2 nanoparticles

Cited by 31 publications

References 33 publications

In situcarbon-supported titanium dioxide (ICS-TiO2) as an electrode material for high performance supercapacitors

In situcarbon-supported titanium dioxide (ICS-TiO2) as an electrode material for high performance supercapacitors

Fine Control of the Chemistry of Nitrogen Doping in TiO2: A Joint Experimental and Theoretical Study

Modulation of terahertz properties of 3D ceramic photonic crystals via post‐creation non‐metal anion doping treatment

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In situcarbon-supported titanium dioxide (ICS-TiO₂) as an electrode material for high performance supercapacitors

In situcarbon-supported titanium dioxide (ICS-TiO₂) as an electrode material for high performance supercapacitors

Fine Control of the Chemistry of Nitrogen Doping in TiO₂: A Joint Experimental and Theoretical Study