Passivated co-doping approach to bandgap narrowing of titanium dioxide with enhanced photocatalytic activity

Na-Phattalung, Sutassana; Limpijumnong, Sukit; Yu, Jaejun

doi:10.1016/j.apcatb.2016.06.054

Cited by 93 publications

(40 citation statements)

References 69 publications

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“…Obviously, compared with the pristine TiO 2 NBs sample, the E g peak at 141 cm −1 broadened and showed a blue‐shift for d‐TiO 2 NBs and N‐doped d‐TiO 2 NBs. Localized states above the valence band edge are generated from the disorders and defects induced by Al reduction, leading to a bandgap narrowing …”

Section: Resultsmentioning

confidence: 99%

Boosting Supercapacitor Performance of TiO₂ Nanobelts by Efficient Nitrogen Doping

et al. 2017

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TiO2 has great potential in the application of biocompatible supercapacitors. Unfortunately, because of its semiconducting nature, TiO2 exhibits poor electrical conductivity and extremely low specific capacitance. Doping with other atoms is a facile way to enhance electrochemical activity of TiO2. However, the restricted solubility of substitutional dopants in bulk largely impaired the effectiveness of doping, resulting in quite limited capacitance improvement. To overcome this issue, we propose a two‐step approach to efficiently dope TiO2 nanobelts with nitrogen. High‐level nitrogen doping (6.1 at. %) was achieved in the distinct crystalline core/disordered shell structured TiO2, boosting the specific capacitance of TiO2 from 4 F g−1 to 216 F g−1. Employing compressible, light‐weight three‐dimensional graphene as current collector, the symmetrical cell exhibits a volumetric energy density of 9.6 mWh cm−3, highly comparable with the supercapacitors based on conventional pseudocapacitive materials. These encouraging findings unambiguously smash the capacitance bottleneck of TiO2 and open the door towards the application of TiO2 in energy‐storage systems.

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Section: Resultsmentioning

confidence: 99%

Boosting Supercapacitor Performance of TiO₂ Nanobelts by Efficient Nitrogen Doping

et al. 2017

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“…Therefore, advanced techniques (such as time‐dependent method) are more appropriate to understand the flow of charges . Studies have been reported on interfacial charge‐transfer transitions from the occupied levels of the surface‐bound 7,7,8,8‐tetracyanoquinodimenthane molecules to the unoccupied levels of the TiO 2 due to the photon excitation in the visible to near‐IR region …”

Section: Charge Transfer Analyzed By Theoretical Calculationsmentioning

confidence: 99%

Light‐Driven Sustainable Hydrogen Production Utilizing TiO₂ Nanostructures: A Review

et al. 2018

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As a promising alternative clean energy to fossil fuels, H2 has been given increasing attention, and efficient H2 production is urgently required. Photocatalytic H2 generation from water splitting (WS) is deemed to be a promising and green route for H2 production. TiO2 has been widely utilized in WS owing to the stability, low cost, corrosion resistance, and environmental safety properities. Nevertheless, two dominant defects (inferior absorption performance in visible light and recombination of photogenerated e−–h+ pairs) still impede the development of TiO2. This review offers a comprehensive overview of the progress of various routes for TiO2 nanostructures (0D–3D) and diversified modifications for enhanced H2 production. Further, the perspectives and opportunities for TiO2 based materials are promoted. Persistent efforts are needed to equip the TiO2 nanomaterials with original advanced commercialization and functionality.

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“…To improve the photocatalytic efficiency, several methods, such as modification of TiO 2 nanoparticles with conductive organic materials, metal nanoparticles, and carbon materials, were developed to prevent electron-hole pair recombination [4,[20][21][22][23][24]. The integration of TiO 2 and graphene (GR) is intensively investigated, and advancement in this technology is obvious in recent studies because of the super photoelectric properties of GR.…”

Section: Introductionmentioning

confidence: 99%

TiO₂-Intercalated Graphene Oxides with Highly Efficient Photocatalytic Degradation for Methylene Blue

Yao

et al. 2018

Journal of Nanomaterials

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The low photocatalytic decomposition activity of TiO 2 toward industrial pollutants at room temperature is one of the main obstacles for its practical application. TiO 2 -intercalated graphene oxide (GO) composites were prepared by in situ hydrolysis of butyl titanate in a GO aqueous solution, followed by hydrothermal reaction to improve their photoelectron separation efficiency. The in situ generated TiO 2 nanocrystals could grow and adhere to the GO walls, thereby greatly improving the contact area and binding strength among them and resulting in low photoelectron transfer resistance. The photocatalytic activities of the as-prepared catalyst were evaluated via photodegradation of methylene blue (MB). The TiO 2 -intercalated GOs displayed much higher catalytic activity than GO, TiO 2 , and TiO 2 -adsorbed GOs. The degradation efficiency of MB by TiO 2 -intercalated GOs increased with increasing bath ratio of TiO 2 -intercalated GOs to MB solution, but it decreased with increasing initial concentration of MB. Degradation of MB by UV light was much faster than by simulated sunlight. The degradation time by sunlight was only 5% of degradation time by UV light. Cyclic catalytic experiments indicated that TiO 2 -intercalated GO maintained 99.97% degradation activity after repeated degradation (five times), thereby indicating the good decomposition durability.

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Passivated co-doping approach to bandgap narrowing of titanium dioxide with enhanced photocatalytic activity

Cited by 93 publications

References 69 publications

Boosting Supercapacitor Performance of TiO₂ Nanobelts by Efficient Nitrogen Doping

Boosting Supercapacitor Performance of TiO₂ Nanobelts by Efficient Nitrogen Doping

Light‐Driven Sustainable Hydrogen Production Utilizing TiO₂ Nanostructures: A Review

TiO₂-Intercalated Graphene Oxides with Highly Efficient Photocatalytic Degradation for Methylene Blue

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Passivated co-doping approach to bandgap narrowing of titanium dioxide with enhanced photocatalytic activity

Cited by 93 publications

References 69 publications

Boosting Supercapacitor Performance of TiO2 Nanobelts by Efficient Nitrogen Doping

Boosting Supercapacitor Performance of TiO2 Nanobelts by Efficient Nitrogen Doping

Light‐Driven Sustainable Hydrogen Production Utilizing TiO2 Nanostructures: A Review

TiO2-Intercalated Graphene Oxides with Highly Efficient Photocatalytic Degradation for Methylene Blue

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Product

Resources

About

Boosting Supercapacitor Performance of TiO₂ Nanobelts by Efficient Nitrogen Doping

Boosting Supercapacitor Performance of TiO₂ Nanobelts by Efficient Nitrogen Doping

Light‐Driven Sustainable Hydrogen Production Utilizing TiO₂ Nanostructures: A Review

TiO₂-Intercalated Graphene Oxides with Highly Efficient Photocatalytic Degradation for Methylene Blue