Journal of the Iranian Chemical Society
·
2016
·Vol. 14
·期 2
·503-507
·
IF 1.3
Wang Hongtao,Miao Hui
In this study, dense polytetrafluoroethylene (PTFE)/Sn 1− x
Ga
x
P 2 O 7 ( x = 0.05, 0.10, 0.15, 0.20) inorganic–organic composite electrolytes were prepared. The result of SEM images indicates that all the composite electrolytes are sufficiently uniform and dense. The conductivities which is given consideration to the influence of Ga 3+ doping level increase in the order: σ ( x = 0.20) < σ ( x = 0.15) < σ ( x = 0.10) < σ ( x = 0.05). The highest conductivity 1.9 × 10 −2 S cm −1 is observed for PTFE/Sn 1− x
Ga
x
P 2 O 7 ( x = 0.05) in wet O 2 at 225 °C. The H 2 /O 2 fuel cells using PTFE/Sn 1− x
Ga
x
P 2 O 7 ( x = 0.05, 0.10) as electrolytes generate the maximum power densities of 63 mW cm −2 for x = 0.05 and 36.3 mW cm −2 for x = 0.10 at 150 °C, respectively.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
高影响因子
Materials Advances
·
2022
·Vol. 3
·期 7
·3267-3277
·
IF 0
Yan Cui,Yan Gao,Zhichao Meng,Tao Hu,Yeqing Chen,Yan Chen,Qingguang Zeng
Optical thermometry offers promising applications in the fields of microelectronics and biomedicine, as well as in fire pre-warning systems. In this research, Pr3+-activated SrZn0.33Nb0.67O3 phosphors were successfully prepared via solid-state reactions. Under ultraviolet excitation, the SrZn0.33Nb0.67O3:x%Pr3+ (x = 0.25/0.75/1.25/2) phosphors exhibit bright blue and red emissions, located at 491 nm (3P0 → 3H4), 619 nm (1D2 → 3H4) and 651 nm (3P0 → 3F2). Specifically, two fluorescence intensity ratio (FIR) models of 1D2 → 3H4versus3P0 → 3H4 (Red1/Blue) and 1D2 → 3H4versus3P0 → 3F2 (Red1/Red2) in the temperature range of 300–500 K are adopted for temperature sensing. Our results show that the designed phosphor can serve as a novel potential self-calibrated optical thermometer. Moreover, the temperature sensitivity of the FIR thermometer is significantly enhanced when Ga3+ is incorporated into the SrZn0.33Nb0.67O3. Specifically, the maximum absolute and relative sensitivity for the 6% Ga3+ co-doped sample are increased five- and two-fold, respectively, compared with the undoped sample. This work may provide useful inspiration for effectively improving the temperature-sensing performance of optical thermometers.
研究领域:
材料科学
·
光学工程
·
生物医学工程
✓ 已验证
产品关联
DOI
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Run Yu,Yongjin Chen,Chengyu Li,Shaojun Wang,Pengcheng Li,Ruihan Tang,Cong Gao,Chuanlong Lin,Xiang Gao
The garnet-type oxide Li 7 La 3 Zr 2 O 12 solid-state electrolytes (SSEs) are considered as a reliable option in all-solid-state lithium batteries (ASSLBs) due to its excellent properties. However, it still faces challenges such as limited ionic conductivity and low air stability. In this work, Ga 3+ and Ta 5+ co-doped samples Li 7−3 x − y Ga x La 3 Zr 2− y Ta y O 12 (Ga x Ta y -LLZO) synthesized via the solid-state method are demonstrated to stabilize the cubic phase, regulate the concentration of Li vacancies in LLZO, and improving the Li + transport channels. As a result, the Ga0.1Ta0.3-LLZO sample achieves a high conductivity of ∼1 mS cm −1 . Furthermore, we discovered that in addition to the previously reported effects of decreasing grain boundary density and the inert LiGaO 2 secondary phase at grain boundaries, the synergistic effect of introducing multiple dopant ions, which enhances lattice stability, is also a key factor contributing to improved air stability. Our findings demonstrate that co-doping strategy with Ga 3+ /Ta 5+ is an effective method for simultaneously enhancing conductivity and air stability of LLZO, laying solid foundation for the application of SSEs in ASSLBs.
研究领域:
材料科学
·
电池技术
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产品关联
DOI
高影响因子
PLANT PHYSIOLOGY AND BIOCHEMISTRY
·
2023
·
IF 6.5
Zijing Zhou,Zhengchun Li,Fuhua Fan,Huijuan Qin,Guijie Ding
Gibberellins (GAs) play a crucial role in regulating secondary growth in angiosperms, but their effects on the secondary growth of gymnosperms are rarely reported. In this study, we administered exogenous GA 3 to two-year-old P. massoniana seedlings, and examined its effects on anatomical structure, physiological and biochemical changes, and gene expression in stems. The results showed that exogenous GA 3 could enhance xylem development in P. massoniana by promoting cell division. The content of endogenous hormone (including auxins, brassinosteroids, and gibberellins) were changed and the genes related to phytohormone biosynthesis and signaling pathway, such as GID1 , DELLA , TIR1 , ARF , SAUR , CPD , BR6ox1 , and CYCD3 , were differentially expressed under GA 3 treatment. Furthermore, GA 3 and BR (brassinosteroid) might act synergistically in promoting secondary growth in P. massoniana . Additionally, lignin content was significantly increased after GA 3 treatment accompanied by the express of lignin biosynthesis related genes. PmCAD (TRINITY_DN142116_c0_g1), a crucial gene involved in the lignin biosynthesis, was cloned and overexpressed in Nicotiana benthamiana , significantly promoting the xylem development and enhancing stem lignification. It was regarded as a key candidate gene for improving stem growth of P. massoniana . The findings of this study have demonstrated the impact of GA 3 treatment on secondary growth of stems in P. massoniana , providing a foundation for understanding the molecular regulatory mechanism of stem secondary growth in Pinaceae seedlings and offering theoretical guidance for cultivating new germplasm with enhanced growth and yield.
研究领域:
植物生理学
·
分子生物学
·
林业
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DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yaling Lin,Jie Hu,Yongwei Guo,Qilin Zou,Dejian Chen,Kunyuan Xu,Sisi Liang,Xiaodong Yi,Hongyu Lu,Shi-Bin Wang,Haomiao Zhu
The emission of persistent luminescence nanoparticles (PLNPs) is in the second near infrared region (NIR-II, 1000–1700 nm), considered as ideal fluorescence imaging materials because of their special characteristic consist of no autofluorescence, weak scattering and deep tissue penetration depth in biological tissues. However, it is still a great challenge to enhance their persistent luminescence intensity. Herein, we reported a new MgGe 0.8 Ga 0.2 O 3 : Yb 3+ (MGGO: Yb 3+ ) PLNPs, which were synthesized through solvothermal liquid-solid-solution and salt microemulsion method. We found that partially replacing Ge 4+ with Ga 3+ ions in MgGeO 3 host can increase the density of traps, thus significantly improving the NIR-II persistent luminescence intensity of Yb 3+ ions (the decay time is more than 33 min). Moreover, X-ray could be used to repeatedly stimulate the NIR-II persistent emission of MGGO: Yb 3+ , which is pivotal for deep tissues long term imaging. The optical penetration length of Yb 3+ ions persistent luminescence was assessed to be 3.9 mm via capping tissue. The above results reveal that MGGO: Yb 3+ PLNPs are promising material to be applied to deep-tissue imaging field.
研究领域:
材料科学
·
生物医学工程
·
光学成像
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zezhen Yin,Yun Zhang,Shihua Ding,Tianxiu Song,Xiaoning Li,Jiaying Dan
The solid-phase method was utilized to synthesize LiAl 1- x Be x O 2- x /2 and LiAl 1- x Ga x O 2 ceramics. By Phillips-Van Vechten-Levine (P-V-L) theory, a strong correlation between chemical bond characteristics and microwave dielectric properties was established. X-ray diffraction (XRD) analysis confirmed that all components formed single-phase solid solution with tetragonal structure. Using Be 2+ and Ga 3+ as substitutes, the differences in ionic radii produced diametrically opposite changes in cell volume. The relative density increased to 97.61 % (98.57 %) with the addition of Be 2+ (Ga 3+ ). According to the P-V-L theory, the variation of ε r was influenced by bond ionization. The introduction of different ions caused bond lengths variations, which in turn affected the lattice energy fluctuations. Importantly, this change more than doubled Q×f from 16,268 GHz to 37,015 GHz. Furthermore, the evolution of τ f can be elucidated by the bond energy. Sintered at 1250 °C, both LiAl 0.96 Be 0.04 O 1.98 and LiAl 0.98 Ga 0.02 O 2 demonstrated outstanding microwave dielectric properties, characterized by ε r = 5.83–6.08, Q×f = 32,727∼37,015 GHz, and τ f = −134.8∼-112.4 ppm/°C.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Qi Liu,Yatong Liu,Zhiyong Xing,Yuntong Huang,Li Ling,Xinglin Mo
In this study, a novel dual-function probe BMP based on benzothiazole was easily synthesized and characterized through common optical technique. In the system consisting of DMF/H 2 O (v/v, 2/3), probe BMP showed azure and blue-green to Al 3+ and Ga 3+ , respectively. Besides, the binding ratios of BMP to Al 3+ and Ga 3+ were determined as 1:1, which confirmed by Job’s plot. Furthermore, for Al 3+ and Ga 3+ , the limit of detection (LOD) was determined to be 1.51 × 10 -6 M and 4.28 × 10 -6 M, respectively. Moreover, it was worth noting that BMP showed good performances in paper colorimetry, cell phone colorimetric identification and cell imaging.
研究领域:
分析化学
·
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 112
·111052-111059
·
IF 3.289
Yuemei Li,Rui Wang,Yanling Xu,Jianjun Zhou,Zhihua Liu,Xiaojing Yan,Li Ma
ZnO:Yb3+,Tm3+,Ga3+ up-conversion nanoparticles (UCNPs) with sizes of between 20 and 65 nm are synthesized by the hydrothermal method. The size of the nanocrystals is affected by different Ga3+ concentrations. The variation in size has influence on the particles' visible blue and red up-conversion (UC) emission. In this paper, X-ray powder diffraction results show different amounts of gallium substituting for Zn in the ZnO lattice. When the concentration of Ga3+ is 3 mol%, the resulting UCNPs exhibit strong UC emission, longer fluorescence lifetime and narrower band gap. Due to their adjustable size and UC fluorescence properties, ZnO:Yb3+,Tm3+,Ga3+ nanocrystals have broad prospects for future applications in the biomedical field.
研究领域:
材料科学
·
纳米医学
·
生物光子学
·
无机功能材料
·
分子影像
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 3
·2102074
·
IF 9.926
Zi Chen,Dongdong Lu,Hangqing Xie,Xiaolei Yang,Yang Li,Chenhao Bao,Lei Lei,Shiqing Xu
The increasing demand for radiation detection in many applications has led to demanding requirements for scintillators. Realizing low-dose, pollution-free, and reliable X-ray detection has become a key technical challenge. Here, a triplet-enhanced lanthanide radioluminescence (RL) material Ga 3+ /Tb 3+ metallacrowns (Tb-1) is reported. This Tb-1 crystal emits bright green luminescence under ultraviolet light or X-ray excitation, and the emission intensity is 286 and 242 times that of Tb 3+ in inorganic salt, respectively. Tb-1 crystal is further passivated by trioctylphosphine oxide (TOPO), and the enhanced RL intensity is equivalent to that of commercial Tl-doped cesium iodide scintillator. In addition, RL of Tb-1–TOPO has an extremely narrow full width at half maximum and an excellent linear response to the X-ray dose rate. The detection limit is calculated to be 0.146 μGy s −1 , which is 38 times lower than typical medical imaging doses. Triplet-enhanced lanthanide RL provides new ideas for replacing scintillators that require high temperature synthesis processes such as inorganic phosphors and ceramics, and provides a new alternative scintillator material for flexible X-ray monitoring, bioimaging, radiotherapy, and other applications.
研究领域:
辐射检测
·
材料科学
·
医学成像
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2019
·Vol. 4
·期 4
·1621-1629
·
IF 4.912
Yachao Du,Qingwen Tian,Jin Huang,Yuechao Zhao,Xiaohuan Chang,Afei Zhang,Sixin Wu
Additional elements in Cu2ZnSn(S,Se)4 (CZTSSe) absorber layers present a viable strategy to improve the performance of thin film solar cells. In this study, heterovalent cation doping by partially substituting metal cations with Ga3+ is explored by constructing a sandwich-like configuration. We demonstrated that a low doping level of Ga3+ can be successfully incorporated into the host lattice of CZTSSe to form a homogeneous Cu2ZnSn(Ga) (S,Se)4 (CZTGSSe) alloy material. Characterization was performed using SEM, EDS, XRD, Raman spectroscopy, and XPS, which showed that the material fabricated by this heterovalent cation doping method expressed high phase purity, appropriate valence components, and suitable optical bandgap, which are vital for high performance solar cells. As a result, the champion device achieves stabilized efficiency as high as 10.80%, improved by nearly 28% compared with only 8.43% for the reference device.
研究领域:
材料科学
·
太阳能
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 41
·e03562
·
IF 26.8
Shangqing Qu,Tianhao Niu,Xianji Qiao,Yanran Shen,Guohong Cai,Xiaoge Wang,Yonggang Wang,Zhipeng Zhou,Shipeng Zhang,Zeyue Zhang,Guobao Li,Guanqun Cai,Junliang Sun
Na- β ″-Al 2 O 3 is a highly promising solid-state electrolyte (SSE) for solid-state sodium batteries (SSSBs) with a wide electrochemical stability window and excellent stability against metallic sodium. However, its practical application is hindered by the instability of β ″ phase ( R 3 ¯ $\bar 3$ m ) during sintering, low polycrystalline ionic conductivity at room temperature, and poor interfacial contact with sodium anodes. In this study, a stablized SSSB is obtained via doping Ga 3+ into Na 1.67 Mg 0.67 Al 10.33 O 17 (NMAO), which also suppresses the formation of the β ′ phase ( P 6 3 / mmc ) and decreases stacking faults. After sintering at 1550 °C for 2 h, Na 1.67 Mg 0.67 Al 9.33 GaO 17 (NMA9.33GO) exhibits an ionic conductivity of 9.2 × 10 −4 S cm −1 at 30 °C, ≈1.7 times greater than NMAO. Furthermore, Ga 3+ doping enhances the wettability with sodium, achieving superior contact stability and the formation of Na-Ga alloys at the interface significantly improves electrode-electrolyte contact stability, achieving a high critical current density (CCD) of 0.8 mA cm −2 and a low interfacial impedance of 16 Ω cm 2 . A quasi-solid-state battery assembled with Na 3 V 2 (PO 4 ) 3 (NVP) as the cathode demonstrates excellent cycling stability and rate performance, retaining a high discharge capacity of 91 mAh g −1 at 5 C, and maintaining 87% capacity retention after 1000 cycles at 1 C. This work provides new insights into improving electrolyte performance and interfacial engineering through doping strategies, thereby promoting the development of efficient and long-term SSSBs.
研究领域:
材料科学
·
电化学
·
储能
·
固态电池
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 11
·7069-7077
·
IF 3.9
Xiaomeng Yin,Ming Qiang,Hui Lin,Dawei Zhang,Ruijin Hong,Zhaoxia Han
In this work, we fabricated a novel spinel-type phosphor material MgAl 2− x Ga x O 4 doped with Cr 3+ by the high-temperature solid-state sintering method. The crystal field environment of the spinel was tuned by replacing the Al ions with Ga 3+ ions of different concentrations. The cell volume and D q / B gradient increase from 2.82 to 2.62 with increasing Ga 3+ ion doping concentration. This also implies a gradual decrease in the field strength of the crystal. Based on this, the excitation spectra of MgAl 1.995− x Ga x O 4 :0.5%Cr 3+ phosphors yield a redshift. Increasing the Ga 3+ ion doping concentration also improves the emission intensity and thermal stability of the phosphors, and the emission intensity of the Ga 3+ -doped phosphors is significantly increased. For a Ga/Al ratio of 1, the thermal stability of the phosphor emission is optimal. The emission intensity at 140°C can maintain 76% of the emission intensity at room temperature, indicating that appropriate Ga 3+ ion doping can improve the emission efficiency and thermal stability of the phosphors.
研究领域:
材料科学
·
光学
·
荧光粉技术
✓ 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）