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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
发表期刊JOURNAL OF MATERIALS CHEMISTRY
卷号22期号:28页码:14180-14190
摘要

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.

文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1039/c2jm31469j
研究领域[WOS]Chemistry ; Materials Science
关键词[WOS]TITANATE NANOTUBES ; FORMATION MECHANISM ; TITANIUM-DIOXIDE ; STRUCTURAL FEATURES ; RAMAN-SPECTROSCOPY ; HIGH-TEMPERATURE ; NANBO3 POWDERS ; THIN-FILMS ; PERFORMANCE ; ENHANCEMENT
收录类别SCI
语种英语
WOS类目Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号WOS:000305796300046
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10538
专题中国科学院广州能源研究所
作者单位1.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
推荐引用方式
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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