Transparent niobium-doped titanium dioxide thin films with high Seebeck coefficient for thermoelectric applications

Ribeiro, Joana M.; Correia, Filipe C.; Rodrigues, Francisca; Reparaz, J. S.; Goñi, Alejandro R.; Tavares, C. J.

doi:10.1016/j.surfcoat.2021.127724

Cited by 6 publications

(3 citation statements)

References 56 publications

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“…Nb-doped TiO 2 has potential application in batteries and supercapacitors including lithium-ion batteries , and Na-ion batteries . Other potentials uses are for CO sensing and thermoelectric power production …”

Section: Introductionmentioning

confidence: 99%

“…21 Other potentials uses are for CO sensing 22 and thermoelectric power production. 23 These many possible uses of Nb-doped TiO 2 , many of which are in new energy developments, suggest that there could be future demand for large quantities of the material and in applications where a low cost of production would be required. Therefore, a process to produce the doped material on a large scale from readily available natural resources is highly desirable.…”

Section: Introductionmentioning

confidence: 99%

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Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO₂ Produced from Ilmenite Digested in Hydrochloric Acid

et al. 2022

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Niobium doping of TiO 2 creates a conductive material with many new energy applications. When TiO 2 is precipitated from HCl solutions containing minor Nb, the Nb in solution is quantitatively deposited with the TiO 2 . Here, we investigate the structure of Nb doped in anatase and rutile produced from ilmenite digested in hydrochloric acid. Nb K-edge X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) are used to characterize the environment of 0.08 atom % Nb doped in TiO 2 . XANES shows clear structural differences between Nb-doped anatase and rutile. EXAFS for Nb demonstrates that Nb occupies a Ti site in TiO 2 with no near neighbors of Nb. Hydrolysis of Ti and Nb from acid solution, followed by calcination, leads to a well dispersed doped material, with no segregation of Nb. Production of Nb-doped TiO 2 by this method may be able to supply future demand for large quantities of the material and in energy applications where a low cost of production, from readily available natural resources, would be highly desirable.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO₂ Produced from Ilmenite Digested in Hydrochloric Acid

et al. 2022

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“…Typical materials used in the thermocouples are metals and semiconductors [ 11 ], with and being the most common materials [ 10 ]. Doping allows materials with high thermal conductivity to be adequate for thermoelectric applications, such as -doped [ 12 ] or Si-doped graphene [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Concept, modeling and experimental evaluation of an integrated cooling, heating and thermoelectric generation system

Santos

Colmanetti

Cabezas‐Gómez

et al. 2022

J Braz. Soc. Mech. Sci. Eng.

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A concept of an integrated system for cooling, heating and electricity generation using thermoelectric effect and water is presented. The concept consists of two 2-L capacity water reservoirs: The first one has been used to store cold water and the second one to store heated water. Both reservoirs are thermally connected by two thermoelectric modules, which can be used to heat and cool the water when supplying electrical energy to the modules or generate electricity when hot and cold water are stored in these two reservoirs. A theoretical model of the system is developed for transient simulation where heat transfer and energy conservation differential equations were numerically solved and a real prototype was built. The model uses the maximum performance parameters available in commercial thermoelectric datasheets to obtain all other relevant thermoelectric variables. The agreement between the developed model and the experiment was close to 95%, and the proposed system was able to cool water near zero degrees Celsius, to heat it near the water boiling point, and generate more than 1.5 W of electrical power when operated as thermoelectric generator using heated water and cold water with 70 °C temperature. The simulations also showed that water reservoirs of 25 L capacity, with initial temperatures of 95 °C for hot water and 25 °C for cold water, can be used to supply peak electrical power of 2.3 W and mean power of 1 W for 12 h, energy equivalent 6 AA alkaline batteries. This system has the potential to be applied for sustainable cooling, heating and electricity generation in isolated communities and in non-urban regions.

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Thermoelectric materials and devices: Applications in enhancing building energy conversion and efficiency

Sun,

Du,

Chen

2025

Advanced Nanocomposites

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Transparent niobium-doped titanium dioxide thin films with high Seebeck coefficient for thermoelectric applications

Cited by 6 publications

References 56 publications

Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO₂ Produced from Ilmenite Digested in Hydrochloric Acid

Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO₂ Produced from Ilmenite Digested in Hydrochloric Acid

Concept, modeling and experimental evaluation of an integrated cooling, heating and thermoelectric generation system

Thermoelectric materials and devices: Applications in enhancing building energy conversion and efficiency

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Transparent niobium-doped titanium dioxide thin films with high Seebeck coefficient for thermoelectric applications

Cited by 6 publications

References 56 publications

Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO2 Produced from Ilmenite Digested in Hydrochloric Acid

Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO2 Produced from Ilmenite Digested in Hydrochloric Acid

Concept, modeling and experimental evaluation of an integrated cooling, heating and thermoelectric generation system

Thermoelectric materials and devices: Applications in enhancing building energy conversion and efficiency

Contact Info

Product

Resources

About

Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO₂ Produced from Ilmenite Digested in Hydrochloric Acid

Niobium K-Edge X-ray Absorption Spectroscopy of Doped TiO₂ Produced from Ilmenite Digested in Hydrochloric Acid