Formation and thermoelectric property of TiO2 nanotubes covered by Te–Bi–Pb nanoparticles

Bottom-up assembly to Ag nanoparticles embedded Nb-doped TiO2 nanobulks with improved n-type thermoelectric properties

“…6 Recently, there have been a few studies focusing on the thermoelectric properties of modified TiO 2 as in the following examples. 4,7,8 TiO 2 nanotubes covered with Te-Bi-Pb nanoparticles exhibit larger S than pure TiO 2 nanotubes. 7 Nb 2 O 5 or Ta 2 O 5 doped (Ti 0.75 Sn 0.25 )O 2 ceramics show enhanced electrical conductivity and reduced lattice thermal conductivity (k l ) 8 while the B-doping of rutile-type TiO 2 decreases both the electrical conductivity and thermal conductivity (k).…”

“…4,7,8 TiO 2 nanotubes covered with Te-Bi-Pb nanoparticles exhibit larger S than pure TiO 2 nanotubes. 7 Nb 2 O 5 or Ta 2 O 5 doped (Ti 0.75 Sn 0.25 )O 2 ceramics show enhanced electrical conductivity and reduced lattice thermal conductivity (k l ) 8 while the B-doping of rutile-type TiO 2 decreases both the electrical conductivity and thermal conductivity (k). 4 Besides, modified TiO 2 is widely applied to photocatalysis, 9 solar cells, 10 gas sensors, 11 lithium ion batteries, 12 etc.…”

Flexible thermoelectric nanodevices based on three-dimensional networks of poly(3,4-ethylenedioxythiophene) nanowires and graphene

“…13,14 Fortunately, low-dimension materials have demonstrated their use as an effective way to significantly improve TE performance because the nanostructure can have similar electrical conductivity while notably reducing the thermal conductivity. 15 Recently, various low-dimension nanostructures, such as nanorods, 16–18 nanotubes, 19,20 nanoribbons 21,22 and nanofibers, 23–26 have been investigated. Particularly, low-dimension conducting polymer nanocomposites have attracted widespread attention.…”

Thermal Conductivity of Rutile and Anatase TiO2 from First-Principles

“…The thermal properties of TiO 2 have received comparatively less attention, but they are important both from a fundamental standpoint and for applications related to thermal management and thermoelectricity. [25][26][27][28][29][30][31] Experimentally, the thermal conductivity of rutile was Touloukian et al 37 A few theoretical works have studied the elastic and thermal properties of anatase and rutile from first principles, [38][39][40] computing the phonon dispersions, the heat capacity, and the Grüneisen parameter. Regarding the thermal conductivity, however, the only available first principles results are based on the Cahill-Pohl model, 41,42 which allows obtaining the so-called minimum thermal conductivity from harmonic properties, while a full solution of the phonon Boltzmann Transport Equation (BTE) that includes anharmonic effects is still missing.…”

“…The thermal properties of TiO 2 have received comparatively less attention, but they are important both from a fundamental standpoint and for applications related to thermal management and thermoelectricity. − Experimentally, the thermal conductivity of rutile was first measured by McCarthy and Ballad in 1951, who provided values of its anisotropy close to room temperature. Afterward, Berman and Ziman restricted their works to a rather low-temperature range (2–90 K), while Charvat and Kingery studied the range from 350 to 1000 K .…”