Axial expansion of Ni-doped TiO2 nanorods grown on carbon nanotubes for favourable lithium-ion intercalation

ur-Rehman, Ata; Ali, Ghulam; Abbas, Syed Mustansar; Iftikhar, Muhammad; Zahid, Maryam; Yaseen, Samad; Saleem, Sanum; Haider, Sajjad; Arshad, Muhammad; Badshah, Amin

doi:10.1016/j.cej.2019.122021

Cited by 11 publications

(3 citation statements)

References 73 publications

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“…In 1977, Guth’s group reported for the first time that Fe-doped TiO 2 powder can be used to reduce nitrogen as a photocatalyst. ,, The researchers also demonstrated that transition-metal doping is an effective method to promote the photocatalytic performance for H 2 production. − Among them, nickel is one of the most important dopant ions because of its good optical and electrochemical properties as well as unique electron configuration. − Ni-based catalysts (NiS, Ni 2 P, Ni–Sn) have been demonstrated as an effective catalyst for H 2 production from water or biomass because H prefers to adsorb on the Ni site. In N 2 fixation to form NH 3 , it includes N 2 activation and H 2 addition.…”

Section: Introductionmentioning

confidence: 99%

Vacancy-Enabled Mesoporous TiO₂ Modulated by Nickel Doping with Enhanced Photocatalytic Nitrogen Fixation Performance

Wang

Guan

et al. 2020

ACS Sustainable Chem. Eng.

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Photocatalysis provides a sustainable route to convert N 2 to NH 3 with the aid of a photogenerated electron. Beyond the typical issue in the photocatalytic field, NH 3 synthesis requires adsorption, activation, and hydrogenation of N 2 . In this report, Ni-doped TiO 2 (Ni-x-TiO 2 ) photocatalysts were fabricated by a simple sol−gel method to introduce the oxygen defects and Ni site on TiO 2 . The oxygen vacancy (Vo) enhances the adsorption of N 2 on the catalyst surface. The Ni doping induced a defect energy level below the conduction band, which prefers to accept the photogenerated electron. The electron captured by Vo tends to transfer to the adsorbed N 2 and activate N 2 . On the other hand, the Ni site is a typical H 2 production site. It provides enough H 2 for the hydrogenation of N 2 to form NH 3 . To sum up all of these advantages, Ni-doped TiO 2 displays a high NH 3 production rate of 46.80 μmol•g −1 •h −1 which is about 7 times higher than that of pure TiO 2 . This manuscript provides a potential method to design a highly efficient photocatalyst for the NH 3 synthesis.

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Section: Introductionmentioning

confidence: 99%

Vacancy-Enabled Mesoporous TiO₂ Modulated by Nickel Doping with Enhanced Photocatalytic Nitrogen Fixation Performance

Wang

Guan

et al. 2020

ACS Sustainable Chem. Eng.

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“…The spectra show two prominent signals of pure NiO representing the first-order (1P) and the second-order (2P) phonon scattering in NiO located at 528 and 1025 cm –1 , respectively. , The first peak can also be credited to the symmetrical stretching and bending vibration of the Ni–O bond . While the Raman spectra of NiO-MWCNTs display two major peaks positioned at 1321 cm –1 related to the (D-band) of sp 2 carbon along with the G-band at 1528 cm –1 . The D-band is referred to the defects in the atomic lattice of carbon, while the G-band is related to the in-plane stretch vibration of graphitic sp 2 hybridized carbon atoms in MWCNTs.…”

Section: Results and Discussionmentioning

confidence: 99%

Nanometer-thin ZrO₂ Coating for NiO on MWCNTs as Anode for Improved Performance of Sodium-Ion Batteries

Subhan

Rehman

Alwadai

et al. 2023

ACS Appl. Nano Mater.

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A very simple coprecipitation approach is adopted to prepare ZrO2-coated NiO on MWCNTs nanocomposites with NiO nanoparticles within 10–15 nm size. The XPS studies confirm the presence of Zr, Ni, C, and O elements in the sample, while the BET and BJH analyses reveal a typical surface area of 204.44 m2 g–1 with pores between 10 and 15 nm. The electrochemical performance studies of the ZrO2-coated nanocomposite electrode show a higher charge/discharge capacity of 688.3/688.7 mAh g–1 after 200 cycles with excellent retention capacity (96%) and cycling stability. A minor capacity fading has been observed in the rate performance of the electrodes at currents ranging from 100 to 5000 mA g–1. It also reveals that coin cells tend to maintain their maximum Coulombic efficiency of 99.9% at a low current density, revealing a notable reversible capacity. Therefore, adding MWCNTs significantly increases electrochemical performance and prevents pulverization of active materials. While structural flexibility helps in mitigating the volumetric expansion. During the cycling process, the ZrO2 coating helps improve structural stability and facilitate the diffusion of Na ions.

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“…XAS is a local and site-sensitive technique providing information about both the electronic and atomic structures around the absorbing center. Together, XANES/NEXAFS and XPS can provide information about the geometry of the absorbing atom [ 25 ] and structural defects [ 26 ], and, being elementally selective, they provide information about the chemical composition, presence of elements and functional groups on the surface [ 27 , 28 , 29 , 30 ], the oxidation state of elements [ 29 , 31 , 32 ], and the nature of chemical bonding between the CNT and MeO x causing the formation of the composite [ 33 ]. Analysis of up-to-date publications shows that the theoretical interpretation of XANES spectra of nanocomposites based on transition metal oxides and carbon nanotubes is rarely used due to the complexity of applying this technique to the study of nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Interaction in MeOx/MWNTs (Me–Cu, Ni) Nanostructures as Efficient Electrode Materials for High-Performance Supercapacitors

Yalovega,

Brzhezinskaya,

Dmitriev

et al. 2024

Nanomaterials

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Due to their unique physical and chemical properties, complex nanostructures based on carbon nanotubes and transition metal oxides are considered promising electrode materials for the fabrication of high-performance supercapacitors with a fast charge rate, high power density, and long cycle life. The crucial role in determining their efficiency is played by the properties of the interface in such nanostructures, among them, the type of chemical bonds between their components. The complementary theoretical and experimental methods, including dispersion-corrected density functional theory (DFT-D3) within GGA-PBE approximation, scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman, X-ray photoelectron, and X-ray absorption spectroscopies, were applied in the present work for the comprehensive investigation of surface morphology, structure, and electronic properties in CuOx/MWCNTs and NiOx/MWCNTs. As a result, the type of interfacial interaction and its correlation with electrochemical characteristics were determined. It was found that the presence of both Ni–O–C and Ni–C bonds can increase the contact between NiO and MWCNTs, and, through this, promote electron transfer between NiO and MWCNTs. For NiOx/MWCNTs, better electrochemical characteristics were observed than for CuOx/MWCNTs, in which the interfacial interaction is determined only by bonding through Cu–O–C bonds. The electrochemical properties of CuOx/MWCNTs and NiOx/MWCNTs were studied to demonstrate the effect of interfacial interaction on their efficiency as electrode materials for supercapacitor applications.

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Axial expansion of Ni-doped TiO2 nanorods grown on carbon nanotubes for favourable lithium-ion intercalation

Cited by 11 publications

References 73 publications

Vacancy-Enabled Mesoporous TiO₂ Modulated by Nickel Doping with Enhanced Photocatalytic Nitrogen Fixation Performance

Vacancy-Enabled Mesoporous TiO₂ Modulated by Nickel Doping with Enhanced Photocatalytic Nitrogen Fixation Performance

Nanometer-thin ZrO₂ Coating for NiO on MWCNTs as Anode for Improved Performance of Sodium-Ion Batteries

Interfacial Interaction in MeOx/MWNTs (Me–Cu, Ni) Nanostructures as Efficient Electrode Materials for High-Performance Supercapacitors

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Axial expansion of Ni-doped TiO2 nanorods grown on carbon nanotubes for favourable lithium-ion intercalation

Cited by 11 publications

References 73 publications

Vacancy-Enabled Mesoporous TiO2 Modulated by Nickel Doping with Enhanced Photocatalytic Nitrogen Fixation Performance

Vacancy-Enabled Mesoporous TiO2 Modulated by Nickel Doping with Enhanced Photocatalytic Nitrogen Fixation Performance

Nanometer-thin ZrO2 Coating for NiO on MWCNTs as Anode for Improved Performance of Sodium-Ion Batteries

Interfacial Interaction in MeOx/MWNTs (Me–Cu, Ni) Nanostructures as Efficient Electrode Materials for High-Performance Supercapacitors

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Product

Resources

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Vacancy-Enabled Mesoporous TiO₂ Modulated by Nickel Doping with Enhanced Photocatalytic Nitrogen Fixation Performance

Vacancy-Enabled Mesoporous TiO₂ Modulated by Nickel Doping with Enhanced Photocatalytic Nitrogen Fixation Performance

Nanometer-thin ZrO₂ Coating for NiO on MWCNTs as Anode for Improved Performance of Sodium-Ion Batteries