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Bottom-up assembly to Ag nanoparticles embedded Nb-doped TiO2 nanobulks with improved n-type thermoelectric properties
Liu, Chengyan1,2; Miao, Lei1; Zhou, Jianhua1; Huang, Rong3; Tanemura, Sakae1,4,5
2012
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
Volume22Issue:28Pages:14180-14190
Abstract

Nb-doped TiO2-based nanostructures were novelly prepared by an economical and environmentally friendly hydrothermal method from TiO2 and Nb2O5 powder precursors. The proposed formation mechanism is acceptable for the design of various Nb-doped TiO2-based nanostructures. Furthermore, Nb-doped TiO2 nanostructured bulk materials (nanobulks) embedded with Ag nanoinclusions were first fabricated by the bottom-up assembly of Ag2O nanoparticles loaded Nb-doped TiO2-based nanostructures. The introduction of Ag nanoparticles remarkably increased the Seebeck coefficient (S) of the TiO2 bulk ceramic by 15% to 370 mu VK-1 in the maximum case on account of the electron filtering effect. Moreover, their electrical conductivity (sigma) was also improved by one order of magnitude up to 160 Omega(-1) cm(-1), resulting from the contribution of both introducing Ag nanoparticles and Nb-doping. Finally, the figure of merit (ZT) was increased by about two-fold owing to the substantially optimized power factors (S-2 sigma). Our obtained results strongly confirm that the Ag embedded Nb-doped TiO2 nanobulks can be used as good thermoelectric materials up to the high temperature of about 800 degrees C.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1039/c2jm31469j
WOS Subject ExtendedChemistry ; Materials Science
WOS KeywordTITANATE NANOTUBES ; FORMATION MECHANISM ; TITANIUM-DIOXIDE ; STRUCTURAL FEATURES ; RAMAN-SPECTROSCOPY ; HIGH-TEMPERATURE ; NANBO3 POWDERS ; THIN-FILMS ; PERFORMANCE ; ENHANCEMENT
Indexed BySCI
Language英语
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000305796300046
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10538
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.E China Normal Univ, Key Lab Polarized Mat & Devices, Minist Educ, Shanghai 200062, Peoples R China
4.Japan Fine Ceram Ctr, Atsuta Ku, Nagoya, Aichi 4568587, Japan
5.Nagoya Inst Technol, Powder Technol PJ Lab, Showa Ku, Nagoya, Aichi 4668555, Japan
Recommended Citation
GB/T 7714
Liu, Chengyan,Miao, Lei,Zhou, Jianhua,et al. Bottom-up assembly to Ag nanoparticles embedded Nb-doped TiO2 nanobulks with improved n-type thermoelectric properties[J]. JOURNAL OF MATERIALS CHEMISTRY,2012,22(28):14180-14190.
APA Liu, Chengyan,Miao, Lei,Zhou, Jianhua,Huang, Rong,&Tanemura, Sakae.(2012).Bottom-up assembly to Ag nanoparticles embedded Nb-doped TiO2 nanobulks with improved n-type thermoelectric properties.JOURNAL OF MATERIALS CHEMISTRY,22(28),14180-14190.
MLA Liu, Chengyan,et al."Bottom-up assembly to Ag nanoparticles embedded Nb-doped TiO2 nanobulks with improved n-type thermoelectric properties".JOURNAL OF MATERIALS CHEMISTRY 22.28(2012):14180-14190.
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