Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Chemical Tuning of TiO2 Nanoparticles and Sintered Compacts for Enhanced Thermoelectric Properties | |
Liu, Chengyan1,2; Miao, Lei1 ; Zhou, Jianhua1; Huang, Rong3; Fisher, Craig A. J.4; Tanemura, Sakae1,4,5
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| 2013-06-06 | |
| Source Publication | JOURNAL OF PHYSICAL CHEMISTRY C
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| Volume | 117Issue:22Pages:11487-11497 |
| Abstract | A novel, fast combustion method for synthesizing anatase TiO2 nanoparticles (average diameter similar to 14 nm) codoped with N and Nb in a single step is reported. XRD, STEM-EDX, and XPS measurements confirm that Nb ions are incorporated into the tetragonal lattice on Ti sites, while N ions occupy 0 sites, and likely also interstitial sites. Sintering of pellets of codoped powders under reducing conditions produced polycrystalline samples with the rutile structure. Chemically tuned samples have power factors up to 9.87 X 10(-4) W m(-1) K-2, 7 times higher than that of pure TiO2 sintered under the same conditions. In addition, the thermal conductivity is considerably lower at 2.6-4.0 W m(-1) K-1 as a result of greater grain-boundary and point-defect scattering. The figure of merit, ZT, is improved to 0.35 at 700 degrees C, which is the highest value reported for a TiO2 material to date, and is comparable to the highest values of any n-type thermoelectric oxide. Our material also exhibits good thermal stability in a pure N-2 atmosphere and is an excellent candidate for thermoelectric power generators. Consequently, the combustion technique represents a promising new strategy for preparing foreign-atom-doped metal oxides; the chemical tuning approach, a combination of foreign-atom-doped nanoparticle synthesis and optimized sintering process, can be applied to prepare superior thermoelectric materials. |
| Subtype | Article |
| WOS Headings | Science & Technology ; Physical Sciences ; Technology |
| DOI | 10.1021/jp401132g |
| WOS Subject Extended | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| WOS Keyword | NB-DOPED TIO2 ; ELECTRICAL-PROPERTIES ; PHOTOCATALYTIC ACTIVITY ; THERMAL-CONDUCTIVITY ; SEEBECK COEFFICIENTS ; ELECTRONIC-STRUCTURE ; TITANIUM-DIOXIDE ; DEFECT CHEMISTRY ; HIGH-TEMPERATURE ; METHYLENE-BLUE |
| Indexed By | SCI |
| Language | 英语 |
| WOS Subject | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000320214800005 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/10061 |
| Collection | 中国科学院广州能源研究所 |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.E China Normal Univ, Minist Educ, Key Lab Polarized Mat & Devices, Shanghai 200062, Peoples R China 4.Japan Fine Ceram Ctr, Atsuta Ku, Nagoya, Aichi 4568587, Japan 5.Nagoya Inst Technol, Powder Technol Lab, Showa Ku, Nagoya, Aichi 4668555, Japan |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Liu, Chengyan,Miao, Lei,Zhou, Jianhua,et al. Chemical Tuning of TiO2 Nanoparticles and Sintered Compacts for Enhanced Thermoelectric Properties[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(22):11487-11497. |
| APA | Liu, Chengyan,Miao, Lei,Zhou, Jianhua,Huang, Rong,Fisher, Craig A. J.,&Tanemura, Sakae.(2013).Chemical Tuning of TiO2 Nanoparticles and Sintered Compacts for Enhanced Thermoelectric Properties.JOURNAL OF PHYSICAL CHEMISTRY C,117(22),11487-11497. |
| MLA | Liu, Chengyan,et al."Chemical Tuning of TiO2 Nanoparticles and Sintered Compacts for Enhanced Thermoelectric Properties".JOURNAL OF PHYSICAL CHEMISTRY C 117.22(2013):11487-11497. |
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