Optical properties of Nb-doped TiO2 thin films prepared by sol–gel method

Manole, Alina; Dobromir, Marius; Gîrtan, Mihaela; Mallet, Romain; Rusu, G.I.; Luca, D.

doi:10.1016/j.ceramint.2012.11.066

Cited by 72 publications

(24 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pristine and Nb doped TiO 2 particles have a similar particle size (~30 nm in diameter) and morphology. It is well known that Nb doping increases the electronic conductivity, 24,29,30 which would be conducive to the electrochemical performance of the TiO 2 anode in this study. 5 The composition of the samples was further analysed by XPS.…”

Section: Resultsmentioning

confidence: 83%

Niobium doped anatase TiO₂ as an effective anode material for sodium-ion batteries

et al. 2015

View full text Add to dashboard Cite

Sodium-ion batteries are considered to be a promising low-cost alternative to common lithium-ion batteries in the areas where specific energy is less critical. Among all the anode materials studied so far, TiO2 is very promsing due to its low operation voltage, high capacity, nontoxicity, and low production cost. Herein, we present Nb-doped anatase TiO2 nanoparticles with high capacity, excellent cycling performance, and excellent rate capability. The optimized Nb-doped TiO2 anode delivers a high reversible capacity of 177 mAh/g at 0.1 C and 108.8 mAh/g at 5 C, in contrast to 150.4 mAh/g at 0.1 C and only 54.6 mAh/g at 5 C for the pristine TiO2. The good performance is likely to be associated with enhanced conductivity and lattice expansion due to Nb doping. These results, in combination with its environmental friendliness and cost efficiency, render Nb-doped TiO2 a promising anode material for high-power sodium-ion batteries.Nb-doped anatase TiO 2 anode materials with high reversible sodium storage capacities, excellent cycling stability and rate capability were synthesized by sol-gel method.

show abstract

Section: Resultsmentioning

confidence: 83%

Niobium doped anatase TiO₂ as an effective anode material for sodium-ion batteries

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The sol-gel process has distinct advantages over other techniques, including excellent compositional control, homogeneity at the molecular level due to the mixing of liquid precursors, and lower crystallization temperature [123][124][125][126]. Moreover, the microstructure (i.e., the pore size, pore volume, and surface area) of films can be tailored by controlling the processing parameters such as the ratio of the components and temperature [127].…”

Section: Sol-gelmentioning

confidence: 98%

Recent developments in TiO2 as n- and p-type transparent semiconductors: synthesis, modification, properties, and energy-related applications

2015

View full text Add to dashboard Cite

TiO 2 -based thin films and nanomaterials have been fabricated via physical and solution-based techniques by various research groups around the globe. Generally, most applications of TiO 2 involve photocatalytic activity for water and air purification, self-cleaning surfaces, antibacterial activity, and superhydrophilicity. As a widebandgap semiconductor, modified TiO 2 belongs to a class of materials called transparent semiconducting oxides (TSOs), which are simultaneously optically transparent and electrically conductive. TSOs continue to be in high demand for a variety of applications ranging from transparent electronics and sensor devices to light detecting and emitting devices in telecommunications. However, reports on TiO 2 applications as an effective TSO for transparent electronics applications have been limited. In general, TiO 2 is intrinsically an n-type semiconductor but can be doped to have p-type semiconductivity. This provides a very important opportunity to fabricate all-transparent homojunction devices for light harvesting and energy storage. P-type TSOs have recently attracted tremendous interest in the field of active devices for emerging transparent electronics for potential use in ultra-violet light-based solar cells. Therefore, a detailed overview of the synthesis, band structure modification via doping, properties, and applications of modified TiO 2 as n-and p-type TSOs is warranted. This article comprehensively reviews the latest developments. The discussion includes solution-based wet chemical techniques and vacuum-based dry physical techniques fabricating TiO 2 -TSOs. The synthesis of p-TiO 2 in particular is discussed in detail as it may provide interesting breakthroughs in emerging transparent electronics applications. Also, the structural, optical, and electrical properties of TiO 2 are discussed in the context of TSO applications, specifically the defect chemistry of TiO 2 to obtain n-and p-type semiconductivity, which could provide interesting insights into the band structure engineering of TiO 2 for conductivity reversal. Applications of both nand p-type TiO 2 have been reviewed in detail in relation to thin film transparent homo/heterojunction devices, dyesensitized solar cells, electrochromic displays, and other energy-related applications.

show abstract

“…TiO 2 have many excellent properties, such as non-toxicity, good chemical stability, good optical properties, photocatalyst, as well as biocompatibility (1)(2)(3).…”

Section: Introductionmentioning

confidence: 99%

“…Another way to improve the properties of TiO 2 thin film was doping nonmetal or metal ions. Nonmetal (such as N(9),C(10) ) and metal (such as Fe(5),Nb (3,11,12),Sm(13),Hg (14),Mn (15) …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method

et al. 2016

View full text Add to dashboard Cite

TiO 2 thin films doped with neodymium(Nd) in the range from 0 at.% to 10at. % were prepared on glass substrates by sol-gel dip-coating method. Water contact angle on the Nd-doped TiO 2 films were measured by contact angle analyzer. The water contact angle measurement result showed that the hydrophily of the films improved when the Nd 3+ concentration increased to 5 at.%. The photocatalytic activity of the undoped and Nd-doped TiO 2 thin films were investigated by the degradation of methylene blue under high-voltage mercury lamp. The results showed that 5 at.% Nd-doped TiO 2 thin film exhibited the highest photocatalytic efficiency.

show abstract

Optical properties of Nb-doped TiO2 thin films prepared by sol–gel method

Cited by 72 publications

References 22 publications

Niobium doped anatase TiO₂ as an effective anode material for sodium-ion batteries

Niobium doped anatase TiO₂ as an effective anode material for sodium-ion batteries

Recent developments in TiO2 as n- and p-type transparent semiconductors: synthesis, modification, properties, and energy-related applications

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method

Contact Info

Product

Resources

About

Optical properties of Nb-doped TiO2 thin films prepared by sol–gel method

Cited by 72 publications

References 22 publications

Niobium doped anatase TiO2 as an effective anode material for sodium-ion batteries

Niobium doped anatase TiO2 as an effective anode material for sodium-ion batteries

Recent developments in TiO2 as n- and p-type transparent semiconductors: synthesis, modification, properties, and energy-related applications

Synthesis and Properties of Nd-doped TiO2thin films by sol-gel dip-coating method

Contact Info

Product

Resources

About

Niobium doped anatase TiO₂ as an effective anode material for sodium-ion batteries

Niobium doped anatase TiO₂ as an effective anode material for sodium-ion batteries

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method