Chinese Optics Letters
·
2021
·Vol. 19
·期 2
·021601
·
IF 2.448
Jing Zhu,Shiqing Xu,Lei Lei,Feifei Huang,Zhen Xiao
Up-convertion (UC) perovskite Er3+-doped PbTiO3 (Er-PTO) nanoparticles with green and red emissions were synthesized via the hydrothermal method. The UC properties were manipulated by adjusting the concentration of Er3+ ions dopant. The green emission intensity was decreased as the doping concentration increased from 1% to 4% (mole fraction), whereas the red emission intensity was increased. The influences of Er3+ ions on the temperature-sensing performance were further investigated. The results demonstrated that Er-PTO nanoparticles with doping 1% Er3+ ions possessed a sensitivity of 3.1 × 10-3 K−1 at 475 K, presenting a high potential in optical heating devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Gang Jian,Yong Jiao,Qingzhen Meng,Yuhang Guo,Fengwei Wang,Jiaqi Zhang,Cheng Wang,Kyoung-Sik Moon,Ching-Ping Wong
Piezoelectric nanogenerators (PENGs) have been paid great attention in powering electronics via harvesting mechanical energy. Presently, increasing lights are shed onto flexible PENGs capable of working at harsh temperatures. In this research, we report a synthesis of 3D hierarchical PbTiO 3 flower-like structure (PTFs) and polyimide (PI)/PTFs composites from which PENGs with excellent high-temperature energy harvesting performances are fabricated. PTFs exhibit a pure phase and a 3D architecture obtained by the hydrothermal method . The PI/PTFs composite PENGs exhibit good electricity-generation performances of V oc ~ 140 V, I sc ~ 103 μA and P ~ 2128 μW. Moreover, high degree of electric power can be continuously generated by the PENG at a wide range of temperature from room-temperature to 300 °C. Excellent durability up to 5000 cycles can be also obtained for the PENG within the temperature range. It has been demonstrated that a PENG in this study lights fifty light-emitting diodes and the resulting electricity is successfully stored in a capacitor. In addition, a real-time high-temperature application is presented where harvesting electricity via the vibration energy of the running automobile engine occurs. The outstanding piezoelectric performance of PENG in this study is attributed to the thermal stability of PI and PT materials, and unique 3D architectures of PTFs in the composites. This work reveals a PI/PTFs composite based PENG exhibiting excellent energy harvesting properties at high-temperatures and the potential applications as microenergy harvesters .
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2019
·
IF 1.337
Zhen Xiao,Jiawei Zhang,Jing Zhu,Hui Xu,Huanping Wang,Shiqing Xu,Yang Xia
Ho 3+ /Yb 3+ co-doped PbTiO 3 nanocrystals with different content of dopant were successfully prepared via a facile hydrothermal method. The purity, morphology, element distribution, chemical state and up-conversion (UC) photoluminescence (PL) of PbTiO 3 nanocrystals affected by Ho 3+ dopant are investigated systematically. X-ray diffraction (XRD) results illustrate that PbTiO 3 samples with the doping Ho 3+ concentration ranging from 0 to 5 mol-% are perovskite structure. The doping Ho 3+ ions have no change on the crystal structure of perovskite PbTiO 3 . Owing to the non-equivalent substitution of Ho 3+ to Ti 4+ in PbTiO 3 , the particle size of Ho 3+ /Yb 3+ co-doped PbTiO 3 samples is decreased as well as the particle agglomeration is detected. Moreover, Ho and Yb ions have uniform distributions in the PbTiO 3 nanoparticles as the presence of Ho 3+ and Yb 3+ cations. The up-conversion spectra demonstrate that Ho/Yb co-doped PbTiO 3 samples have up-conversion emissions centered at 550 nm, 660 nm and 755 nm, corresponding to the transitions of 5 F 4 ( 5 S 2 )→ 5 I 8 , 5 F 5 → 5 I 8 and 5 S 2 ( 5 F 4 )→ 5 I 7 of Ho 3+ ions. Additionally, the effect of temperature on the UC PL property of Ho 3+ /Yb 3+ co-doped PbTiO 3 system is further investigated. The sensitivity and the trend of Ho 3+ /Yb 3+ co-doped PbTiO 3 samples in temperature from 298 k to 493K are calculated on the basis of fluorescence intensity ratio (FIR) method. Ho 3+ /Yb 3+ co-doped PbTiO 3 nanocrystals are verified the high potential in the optical temperature sensing.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
光子学
·
功能材料
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 30
·6894-6898
·
IF 4.857
Shuyu Zhou,Congping Li,Hao Fu,Jing Cao,Jian Zhang,Lei Zhang
Graphical Outstanding resemblance ! The first molecular model of perovskite PbTiO 3 has been successfully prepared by bottom-up assembly of lead-doped titanium-oxo clusters in the presence of p - tert -butylthiacalix[4]arene as stabilizing ligands. Structural characterization confirmed that the clusters have almost the same structure as that in PbTiO 3 (see figure). The nanoclusters showed high solution stability and can be applied as electron-transport materials in perovskite solar cells to give satisfactory efficiencies and high device stability. In this work we have successfully prepared two lead-doped titanium-oxo clusters with core structures that resemble isolated perovskite PbTiO 3 species. In the obtained highly symmetric Pb 8 Ti 7 -oxo cluster, the central TiO 6 octahedra are orthogonally extended to adjacent octahedra through corner-sharing and the eight dopant lead ions form a cubic arrangement, making it the first molecular model of perovskite PbTiO 3 . Moreover, the clusters readily dissolved in chloroform and showed high solution stability, as confirmed by MALDI-TOF MS measurements. Based on such solution processability, they can be easily spin-coated to form homogeneous films, which were employed as electron-transport materials in perovskite solar cells to give an average power conversion efficiency of around 15 % and improved device stability. This newly developed bottom-up cluster assembly method provides an efficient approach to the construction of atomically precise models of perovskite metal oxides as well as potential molecular tools to extend their applications.
研究领域:
材料化学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jian Gao,Shu Wang,Yupu Liu,Denghui Yang,Xin Li,Fangzheng Yuan,Shuang Han,Wenlong Yang,Hui Zhang
It is of great significance and challenges to construct physical field-enhanced photocatalysts for energy and environmental applications. Herein, an artificial-photosynthesized CdS/PbTiO 3 S-scheme heterostructures with the enhancement of polarization electric field have been developed to promote the bifunctionally catalytic efficiencies for Cr(VI) photoreduction degradation of heavy metal pollution and Tetracycline (TC) photooxidation degradation of antibiotic. In our work, CdS nanoparticles are selectively grown on the positive polarization planes of PbTiO 3 microplates to form the same direction for both the ferroelectric polarization field of PbTiO 3 and the built-in electric field of S-scheme heterojunction. In this case, the stable heterostructures of PTO(00−1)/CdS(010) are obtained, and the greatly improved photocatalytic performances of redox degradation are achieved. The charge transfer mechanism and the synergetic effect between the spontaneous ferroelectric polarization and S-scheme heterojunction have been revealed by DFT calculations and experimental verifications. This interesting finding provides new insight into the design of efficient artificial-photosynthesized photocatalytic systems and we hope our work could serve as a valuable reference for our colleagues.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xing Lin,Xiaojie Wang,Zhipeng Zhang,Huiling Ye,Yang Bai,Shuifa Shen,Haibo Pan
Two-dimensional (2D) perovskite PbTiO 3 is an important ferroelectric material with spontaneous polarization below Curie temperature and readily adsorbs oxygen molecules in the atmosphere, a preliminary step for NH 3 response. However, the surface of 2D PbTiO 3 lacks enough active adsorption sites for NH 3 gas. Here, 2D PbTiO 3 nanoplates (NLs) with highly polarized (0 0 1) plane was synthesized by a two-step hydrothermal strategy without templates and surfactants, and Ag + ions on (0 0 1) plane were further in-situ reduced by an impregnation method. Specially, the negatively polarized surface (ζ (zeta potential) = −22.3 mV) for (0 0 1) plane promoted the reduction of Ag + ions in AgNO 3 solution to Ag 0 nanoparticles (NPs). Where, Ag NPs with high density on (0 0 1) plane can produce spillover effect, promoting adsorption of O 2 in air and subsequent formation of O 2− . The response of PbTiO 3 -based gas sensor to 100 ppm NH 3 is 3.6 at room temperature (25 °C), while the response is improved by 2.6 times on 1.5 at% Ag/PbTiO 3 NLs with Schottky junctions. Even at 15 °C, the response reaches to 6. The ammonia sensor based on Ag/PbTiO 3 NFs is verified with high sensitivity, fast response-recovery and distinct selectivity at low operating temperature.
研究领域:
材料科学
·
化学传感
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
FERROELECTRICS
·
2017
·
IF 0.551
Shaolei Xie,Shuangbin Li,Jiang Xiao,Ying Yao,Yongzhong Jia
PbTiO3 and CaTiO3 ceramics are prepared at temperatures above 2000°C by a direct current arc discharge technique under an argon atmosphere, and the microstructure, components and morphology of each material are investigated. Both samples show the formation of a perovskite structure. Moreover, a tetragonal phase is found in the PbTiO3 ceramic material, and a cubical phase is formed in the CaTiO3 ceramic material. In this work, PbTiO3 and CaTiO3 ceramics were rapidly prepared using a simple DC arc discharge technique; we found this technique of ceramic material synthesis was much faster and better than conventional methods. The whole reaction process only takes 30 seconds because of ultrafast kinetics of crystallization.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Jinsheng Liao,Zhuo Han,Junxiang Huang,Biao Fu,Yijian Sun,Huali Yuan,Herui Wen
This paper reports a new type of PbTiO 3 :Yb 3+ /Er 3+ (PTO:Yb 3+ /Er 3+ ) phosphor synthesized by sol-gel method. Under 980 nm excitation, PTO:Yb 3+ /Er 3+ phosphors exhibited green emission bands centered at 524/549 nm ( 2 H 11/2 / 4 S 3/2 → 4 I 15/2 ) and red emissions 661 nm ( 4 F 9/2 → 4 I 15/2 ). Concentration-dependent upconversion (UC) luminescence spectra showed that the optimal luminescence was observed at 6at%Yb 3+ /2at%Er 3+ -codoping concentration. A possible UC mechanism for PTO:Yb 3+ /Er 3+ phosphor is discussed by the pump power-dependent UC luminescence spectra. The temperature-dependence (298–548 K) of the fluorescence intensity ratios (FIR) for the two green UC emission bands peaked at 524 and 549 nm was studied under a 980 nm laser excitation and the maximum relative sensitivity was approximately 12.25 × 10 −3 K −1 at 298 K. The thermal quenching activation energy of near-infrared (NIR) luminescence was studied. It can be found that the phosphor has a small thermal quenching possibility and excellent thermal stability. The value of repeatability (R) more than 98% has obtained via four cycles of cooling and heating, which prove that the phosphor has a good cycling stability. These results indicate that PTO:Yb 3+ /Er 3+ phosphor is a promising candidate for optical temperature sensors with high sensitivity and good repeatability.
研究领域:
材料科学
·
光学
·
温度传感
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 5
·3438-3446
·
IF 4.186
Shuting Pang,Yiping Wang,Ying Yang,Jiyang Zhang,Querui Hu,Jingjing Shi,XiongJie Li
Bi(Zn 1/2 Ti 1/2 )O 3 −BiScO 3 −PbTiO 3 (BZT−BS−PT) high Curie temperature piezoelectric ceramics were synthesized by the conventional solid-state reaction method. Systematical investigations on the sintering, piezoelectric, and dielectric properties of the piezoceramics have been conducted. It was found that the sintering temperature could be remarkably depressed by varying the compositions in BZT−BS−PT systems. For composition of 11BZT−34BS−55PT ceramic, the sintering temperature is even lowered down to 750°C without any extra additions of sintering aids. Meanwhile, the ceramic sintered at this ultralow temperature presents dense microstructure with relative density up to 97%, as well as optimal properties of piezoelectric coefficient d 33 of 336 pC/N and Curie temperature of 415°C. The mechanism of low sintering temperature may be ascribed to the low melting point bismuth-based components in BZT−BS−PT solid solutions. Furthermore, 11BZT−34BS−55PT multilayer ceramics have been co-fired at 750°C with Ag internal electrodes. The dense structures, low cost, and optimal comprehensive properties of the co-fired multilayers illustrate obvious advantages of the ultralow sintering temperature in LTCC devices, implying promising applications of this Bi(Zn 1/2 Ti 1/2 )O 3 −BiScO 3 −PbTiO 3 high Curie temperature ternary system.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·
IF 0
Li Longyun,Xiao Kunkun,Zhang Jinpu,Du Ruihan,Kang Chunli
This study successfully synthesized a composite photocatalyst g-C 3 N 4 /PbTiO 3 through hydrothermal and calcination methods using PbTiO 3 and g-C 3 N 4 . The catalyst was characterized by XRD, FTIR, Raman, XPS, SEM, TEM, UV–vis DRS, PL, and other techniques. The results indicate that the composite photocatalyst exhibits efficient electron transfer, enhanced light absorption, effective separation and utilization of photogenerated electron–hole pairs, demonstrating superior photocatalytic activity. Under simulated sunlight, the removal efficiency of methyl blue (MB) with an initial concentration of 10 mg/L reaches 93.0% after 120 min. After five cycles, the degradation efficiency of MB is 79.2%, still maintaining 85% of the initial catalytic activity. The pH values in the range of 4.0–7.0, inorganic anions, and water quality have a minimal impact on the photocatalytic degradation of MB. Additionally, the composite photocatalyst exhibits strong removal capabilities for other pollutants, such as tetracycline. Therefore, the prepared catalyst demonstrates good feasibility for practical applications. Free radical quenching experiments indicate that hydroxyl radicals (·OH) are the primary active groups in the photocatalytic degradation of MB. Based on this, a photocatalytic mechanism involving a S-scheme heterojunction has been proposed. This study provides new insights into preparing PbTiO 3 composite semiconductors and constructing novel S-scheme heterojunctions.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Lang Bian,Xudong Qi,Kai Li,Jinhui Fan,Zhanmiao Li,Enwei Sun,Bin Yang,Shuxiang Dong,Wenwu Cao
Ternary 0.552Pb(Ni 1/3 Nb 2/3 )O 3 -xPbZrO 3 -(0.448-x)PbTiO 3 (PNN-PZ-PT) ceramics near the triple point compositions were fabricated by an improved two-step sintering method. The triple point composition 0.552PNN-0.135PZ-0.313PT ceramic has outstanding piezoelectric performance with piezoelectric coefficient d 33 = 1200 pC/N. Its easy fabrication and low cost make this piezoelectric material an excellent candidate for high sensitivity sensors and ultrasonic transducers. The evolution of domain structures for ceramics with composition near the triple point provides deeper insight into the mechanism of ultrahigh piezoelectric properties of PNN-PZ-PT ceramics.
研究领域:
材料科学
·
电陶瓷
·
压电材料
·
传感器与执行器
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Bowen Zhang,Zhiyong Zhao,Fangfang Yu,Diandian Chen,Fei Cheng,Hari Bala,Zhanying Zhang
The CsPbBr 3 perovskite solar cells (PSCs) based on carbon counter electrode (CCE) are promising because of the advantages including fabrication simplicity and excellent stability, but their power conversion efficiencies (PCE) are low due to interfacial carrier recombination as the direct contact of the CsPbBr 3 with electron transport materials (ETM). In this paper, PbTiO 3 shells were grown onto TiO 2 nanorods to form PbTiO 3 -coated TiO 2 scaffold layer via a two-step method. The presence of PbTiO 3 could promote crystallinity of the CsPbBr 3 perovskite film and inhibits interface recombination at the CsPbBr 3 /TiO 2 interface. Consequently, the carbon-based CsPbBr 3 solar cells with PbTiO 3 /TiO 2 scaffold layer achieves a high PCE of 7.28%, demonstrating an increase by 19.9% compared with the devices based on TiO 2 NRs. Moreover, the champion devices exhibited excellent stability in ambient air, with the PCE value remaining at 93% over 28 days.
研究领域:
材料科学
·
太阳能
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）