SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Weining Liu,Hairong Li,Dandan Huang,Xi Tan,Mingyang Zhao,Qionglin Cheng,Ming Yi,Qi Ding,Yaqian Ren,Guohan Liu
Triethylamine (TEA) poses severe safety hazards to industrial production and human health. To accurately detect TEA concentrations and rapidly warn of leakage, a simple reflux condensation method was deployed to successfully incorporate Zn 2+ in situ into Mo-MOFs precursor in a green, safe, and time-efficient synthesis condition. Subsequently, through calcination, MoO 3 /ZnMoO 4 -X (MMZ-X) were prepared, which exhibited an increased number of defects and enriched porosity, facilitating the access and interaction of TEA with adsorption sites. Simultaneously, rationally built in situ MoO 3 /ZnMoO 4 heterostructures accelerated carrier migration and induced a drastic resistive change. MMZ-2 demonstrated outstanding TEA sensing performance, exhibiting extremely high sensitivity ( R = 572.3, 100 ppm), along with superior selectivity, repeatability and stability, rapid response and recovery times, and a low detection limit. Moreover, the key intrinsic parameters of the heterostructure on the atomic scale were determined by density functional theory (DFT) calculations, providing a detailed elucidation of the sensing enhancement mechanism of the MoO 3 /ZnMoO 4 heterostructure. The simple and efficient synthesis method and the related mechanistic analysis pave a new path for designing high-performance TEA gas sensors with practical applications.
研究领域:
材料科学
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化学传感器
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
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2021
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IF 3.721
Xiaowen Zhou,Yu Zhao,Wenzhe Huang,Yuanyuan Wu,Zhongen Wu,Gufeng He
Perovskite lighting-emitting diodes (PeLEDs) with inverted structure have been considered as promising display technology due to their suitable driving schemes with n-type thin-film transistors. However, the defects and imbalanced charge carriers in the CsPbBr 3 nanocrystal (NC) PeLED are key hurdles, limiting the performance. Herein, we have successfully doped Zn 2+ ions into CsPbBr 3 NCs by ligand-assisted reprecipitation method, exhibiting an 85% enhancement of the photoluminescence quantum yield (PLQY). In addition, the optimized energy level alignment via Zn doping facilitates the carrier balance in the devices, improving the efficiencies. The obtained CsPbBr 3 :Zn-based PeLED reaches a high luminance of 3124 cd/m 2 and a maximum external quantum efficiency (EQE) of 0.85%, which are superior to those of CsPbBr 3 -based PeLED (luminance = 564 cd/m 2 , EQE = 0.09%). The results demonstrate that Zn doping significantly enhances the performance of PeLED, which increases the potential of these inverted PeLEDs connected with n-type TFTs towards practical applications.
研究领域:
材料科学
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光电子学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
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2025
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IF 6.7
Kaihuang Huang,Shuaigang Ge,Chaowei Huang,Yongqi Yang,Bingsuo Zou
In recent years, metal halides have attracted much attention because of their fascinating optical properties. However, realizing an emission with efficient white light afterglow is still a great challenge. Here, high-purity Zn 2+ -doped CsCdCl 3 crystals have been synthesized by a hydrothermal method. Part of the Zn 2+ ions replace part of the Cd 2+ ions in the coplanar octahedron, so atomically confined excitons are formed around the coplanar octahedron. This exciton produces blue emission with a center wavelength of 422 nm at room temperature, but also produces weak STE at 595 nm. This is due to the dominance of confined exciton ( Cd CE) luminescence and suppression of intrinsic STE with PLQY reaching 44.53 %. Doping of Zn 2+ emits a white afterglow at room temperature. Raman and pyroelectric spectroscopic analyses show that the A 1g 246 cm −1 phonon mode plays an important role in the electron-phonon coupling process and dominates the afterglow luminescence process. In addition, white light emitting diodes (WLEDs) were fabricated with Zn 2+ doped CsCdCl 3 to show their potential in lighting applications.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2023
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IF 5.2
Wei Liu,Yuanxun Li,Xinyan Liu,Yongcheng Lu
In millimeter-wave communication, signal delay becomes increasingly pronounced as the operating frequency of the equipment rises. To accelerate signal transmission, substrates with low dielectric constants (ε r < 6) are required. This study synthesized a novel microwave dielectric material, NaMg (1- x ) Zn x (PO 3 ) 3 (NMZPO), using the conventional solid-phase method. The microwave dielectric properties of NaMg(PO 3 ) 3 ceramics were enhanced by substituting Mg 2+ with Zn 2+ . Specifically, Zn 2+ doping increased the ceramics' densification and reduced dielectric loss. The NaMg 0.9625 Zn 0.0375 (PO 3 ) 3 ceramic exhibited optimal microwave dielectric properties at sintering temperature 880 °C for 4h: ε r = 4.49, Q × f = 58237.2 GHz (at 17.792 GHz), τ f = −50.6 ppm/°C. In addition, NMZPO ceramics demonstrate excellent chemical compatibility with Ag electrodes. These findings indicate that NMZPO represents a promising candidate for the next generation of ultra-low dielectric constant LTCC materials.
研究领域:
材料科学
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通信工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Dongfang Lv,Jingchuang Han,Zhaowu Li,Jie Xiong,Pingfan Du,Lixin Song
Inorganic hole transport materials (HTMs) play an important role for the stability and efficiency of planar perovskite solar cells (PSCs). Among the numerous inorganic HTMs, NiCo 2 O 4 with its excellent performance is the emerging candidate for hole transport layers (HTLs) and is attracting increasing attention. However, the low electrical conductivity and optical transmittance of NiCo 2 O 4 severely limit the device performance. Herein, the Zn 2+ was used to dope NiCo 2 O 4 to improve the electrical conductivity and optical transmittance of NiCo 2 O 4 . And the effects of the concentration of Zn 2+ on the morphology, structure and properties of NiCo 2 O 4 were investigated. The morphology and transparency of Zn x Ni 1-x Co 2 O 4 would not be affected when the concentration of Zn 2+ is below 0.1, but when it is up to 0.15 and 0.2, the morphology of NiCo 2 O 4 clustered together or showed a diamond-shaped block, and the optical transmittance also decreased significantly. Meanwhile, with the increase of doping amount, the conductivity and hole mobility are gradually increased. As a result, the optimal concentration of Zn 2+ is 0.1. Besides, the Zn 0.1 Ni 0.9 Co 2 O 4 possessed a significant improvement in hole extraction and better band alignment compared to the NiCo 2 O 4. And hence, the power conversion efficiency (PCE) of PSCs fabricated in open air is up to 13.41% by using Zn 0.1 Ni 0.9 Co 2 O 4 . This work develops a potential strategy for developing highly efficient and stable PSCs, opens up a new horizon for the development of inorganic HTMs.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
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2019
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IF 2.846
Guofang Zhang,Yiming Li,Xin Zhao,Jianyi Xu,Yanghuan Zhang
Fe 3+ and Zn 2+ ions were doped into the lattice of CeO 2 via the hydrothermal method . The microstructure and spectra features were analyzed systemically. XRD results show that the solid solubility of Fe 3+ and Zn 2+ ions in Ce 1– x (Fe 0.5 Zn 0.5 ) x O 2 can be identified as x = 0.16. The cell volumes are decreased by increasing the doped content. The TEM graphs prove that the grain size of the sample is about 10 nm, and the EDS result indicates that the doped contents are in accordance with that of the theory concentrations. Meanwhile, the doping also causes the increasing concentrations of the defects and oxygen vacancies which are supported by the XPS , Raman, UV and PL characterizations. The samples exhibit better catalytic activities for improving the hydrogen storage properties and the electrochemical kinetics of the ball milled Mg 2 Ni based composites. Further, the catalysis effects are improved by increasing the doped contents, which can be ascribed to the increasing contents of the oxygen vacancies, defects, the special electron transition states and the nature of the doped ions in CeO 2 -based solid solutions.
研究领域:
材料科学
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催化化学
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Haowen Wang,Hao Zhang,Shixuan Feng,Yuxia Shi,Hankun Wang,Kangze Zhao,Aolin Nie,Tingxi Li,Mingliang Ma,Yong Ma
Nowadays, electromagnetic radiation significantly impacts the normal operation of electronic devices and poses risks to human health. To effectively address this problem, the development of composites that exhibit exceptional electrochemical wave absorption through the combination of different components holds great promise. In this study, we have successfully prepared 1D Ni nanochains@Zn 2+ doping polypyrrole/reduced graphene oxide (Ni NCs@Z-P/RGO, denoted as R-x) composites using a combination of hydrothermal, solvothermal, in situ polymerization, and physical blending methods. Notably, the R-2 composite demonstrates a remarkable minimum reflection loss (RL min ) of −63.58 dB at 14.3 GHz, with a thickness of 1.61 mm. Furthermore, the R-2 composite exhibits an impressive effective absorption bandwidth (EAB) of 5.08 GHz (11.92 GHz-17 GHz) at a thickness of 1.67 mm. These outstanding performances can be attributed to the synergistic effect of the different components and a well-thought-out structural design. Moreover, to showcase the practical applicability of the material, we have conducted additional investigations on the reduction of the radar cross-sectional area (RCS). The results strongly demonstrate that the prepared composite material, when used as a coating, effectively reduces the RCS value by up to 26.6 dB m 2 for R-2 at θ = 0°. The experimental methods and simulations presented in this study hold significant potential for application in wave absorption research and practical implementations. Additionally, the prepared Ni NCs@Z-P/RGO composites demonstrate feasibility as wave-absorbing materials for future utilization.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
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2025
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IF 1.1
Qiuhong Chen,Liyan Wu,Weiyuan Luo,Wenjian Pan,Shuang Zhang,Liping Sun,Meng Zeng
CsPbI 3 perovskite nanocrystals (NCs) are emerged as promising materials for optoelectronic devices because of their superior optical properties. However, the brightness of the deep red fluorescence does not satisfy the requirements of outdoor displays. Herein, we report an effective strategy of Zn 2+ -assisted passivation to obtain pure red fluorescence and narrow emission CsPbI 3 NCs at a modified hot-injection method. It is found that the introduced Zn 2+ ions are successfully doped into the NCs lattice to replace some Pb 2+ ions for passivating some defects, increasing the radiative recombination rate and decreasing the nonradiative recombination rate. As a result, the as-prepared Zn 2+ -treated CsPbI 3 (Zn-CsPbI 3 ) have a luminescence peak position at 635 nm and narrow full width at half maximum of only 29.8 nm, with photoluminescence quantum yield (PLQY) up to 81%, which is 30% higher than the pristine NCs. Meanwhile, the structure of the Zn-CsPbI 3 NCs is orthorhombic (γ) phases, and their morphology is a uniformly distributed hexagonal crystal system.
研究领域:
材料科学
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纳米技术
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光电子学
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钙钛矿纳米材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）