Journal of Energy Storage
·
2024
·
IF 8.9
Zijian He,Hongting Ma,Shilei Lu
In order to effectively address the mismatch between thermal energy supply and demand in buildings, latent heat storage (LHS) based on phase change material (PCM) stands out as a key technology. While hydrated salt has emerged as a promising PCM, it encounters common issues such as substantial supercooling, phase separation, and low thermal conductivity , hindering its development. To mitigate these limitations, this study focused on modifying Ba(OH) 2 ·8H 2 O by incorporating various nucleating agents and thickening agents to reduce supercooling, enhancing the composite PCM's thermal properties by introducing expanded graphite (EG) to elevate thermal conductivity . Subsequently, the thermal stability of the PCM was evaluated through accelerated thermal cycling tests, encompassing the assessment of critical thermal parameters, including supercooling degree, enthalpy, and thermal conductivity of the composite PCM. Experimental findings unveiled the effectiveness of incorporating 2 wt% BaCl 2 ·2H 2 O and 1 wt% CMC to Ba(OH) 2 ·8H 2 O, effectively diminishing the supercooling degree from 14 °C to 1.42 °C. Further integration of 3.5 wt% EG led to a substantial decrease in the supercooling degree to 0.24 °C. Simultaneously, the addition of EG resulted in an improvement in thermal conductivity , elevating it from 0.62 W/(m·K) to 1.03 W/(m·K), while the enthalpy decreased from 283.68 J/g to 252.81 J/g. Notably, the composite PCM exhibited notable thermal reliability with a latent heat drop of 15.9 % following 1000 accelerated cycles of testing. Moreover, the composite PCM demonstrated superior thermal storage density, measuring at 2.36 times that of traditional paraffin wax , yet with a thermal storage cost merely a quarter of paraffin wax, rendering it more favorable for extensive deployment in building energy systems .
研究领域:
能源工程
·
建筑材料
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DOI
高影响因子
Small
·
2024
·
IF 13
Manman Yang,Xiaoling Wu,Anfeng Li,Xia Hao,Lili Wu,Haibo Tian,Dingyu Yang,Jingquan Zhang
The Cs 3 Bi 2 I 9 single crystal, as an all-inorganic non-lead perovskite, offers advantages such as stability and environmental friendliness. Its superior photoelectric properties, attributed to the absence of grain boundary influence, make it an outstanding X-ray detection material compared to polycrystals. In addition to material properties, X-ray detector performance is affected by the thickness of the absorption layer. Addressing this, a space-confined method is proposed. The temperature field is determined through finite element simulation, effectively guiding the design of the space-confined method. Through this innovative method, a series of thickness-controlled perovskite single crystal wafers (PSCWs) are successfully prepared. Corresponding X-ray detectors are then prepared, and the impact of single crystal thickness on device performance is investigated. With an increase in single crystal thickness, a rise followed by a decline in device sensitivity is observed, reaching an optimal value at 0.7 mm thickness at 40V mm −1 with a device performance of 11313.6µC Gy −1 cm −2 . This space-confined method enables the direct growth of high-quality perovskite single crystals with specified thickness, eliminating the need for slicing or etching.
研究领域:
材料科学
·
物理学
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DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Yi Hao,Kaixin Dong,Xinzhang Lin,Junjie Liu,Zhonghao Wei,Jinjin Zhao,Jingyuan Zhang,Xiangxiang Yang,Dan Li,Jingcheng Hu,Kaiqing Jiang,Mengru Zhang,Jiawang Zou,Zihao Zhu,Kebin Lin,Lei Jiang,Yuchen Wu,Yanlin Song,Yingjie Zhao
The development of optoelectronic devices relies heavily on the advancement of semiconductor materials and microfabrication technologies. Notably, metal halide perovskites with superior optoelectronic properties show great prospects for optical sensing technology. However, the current processing techniques of perovskite materials are mainly solution methods and vapor-phase methods, facing toxic solvents and material waste, which are harmful to the natural environment and human health. Herein, we originally developed the temperature field-driven directional space-confined melt crystallization strategy, which perfectly solved the problems of toxic solvent and material waste, yielding highly crystalline, purely oriented 2D perovskite single-crystal films. Long-range-oriented single-crystal films with fewer crystal domains and defects ensure that optical synaptic devices possess image encryption and high-fidelity polarization imaging capabilities. Furthermore, the melt processing technique enables the fabrication of high-quality 2D-3D perovskite heterojunctions, which notably improve the photodetector performance of 2D perovskite. This pioneering work provides a new strategy and opportunity for the environmentally friendly, high-throughput integration of perovskite optoelectronic devices.
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DOI
PubMed
高影响因子
Remote Sensing
·
2024
·Vol. 16
·期 5
·820
·
IF 4.2
Yiheng Liu,Changqing Liu,Yanqing Xin,Ping Liu,Ayang Xiao,Zongcheng Ling
With the development of technology and methodologies, Raman spectrometers are becoming efficient candidate payloads for planetary materials characterizations in deep space exploration missions. The National Aeronautics and Space Administration (NASA) already deployed two Raman instruments, Super Cam and SHERLOC, onboard the Perseverance Rover in the Mars 2020 mission. In the ground test, the SHERLOC team found an axial offset (~720 μm) between the ACI (Autofocus Context Imager) and the spectrometer focus, which would obviously affect the acquired Raman intensity if not corrected. To eliminate this error and, more importantly, simplify the application of Raman instruments in deep space exploration missions, we propose an automatic focusing method wherein Raman signals are optimized during spectrum collection. We put forward a novel method that is realized by evaluating focus conditions numerically and searching for the extremum point as the final focal point. To verify the effectiveness of this method, we developed an Auto-focus Raman Probe (SDU-ARP) in our laboratory. This method provides a research direction for scenarios in which spectrometers cannot focus on a target using any other criterion. The utilization of this auto-focusing method can offer better spectra and fewer acquisitions in focusing procedure, and the spectrometer payload can be deployed in light-weight bodies (e.g., asteroids) or in poor illumination conditions (e.g., the permanently shadowed region in the Lunar south polar area) in deep space exploration missions.
研究领域:
天文学
·
仪器科学
·
空间科学
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Wenji Zhan,Haifei Wang,Jiahao Guo,Yugang Liang,Yanming Wang,Jixin Wu,Zhengzheng Dang,Ni Zhang,Jingjing Cao,Yingping Fan,Yu Zou,Bowei Li,Yao Wang,Yuetian Chen,Yanfeng Miao,Yixin Zhao
Deep-red light-emitting diodes (LEDs) with 690−710 nm emission show high significance in optical, agricultural, and biomedical applications. As primary candidates for deep-red emitters, all-inorganic CsPbI 3 films suffer from fused large grains with abundant trap states, leading to inferior performance of deep-red perovskite LEDs (PeLEDs). Here we report CsPbI 3 nanocrystal films with strong space confinement and notable performance at ∼700 nm of deep-red emission via bulk fabrication. The dual roles of diaza-18-crown-6 dihydriodide additive as crystallization regulator and Lewis base ligand trigger more nucleation sites, retarded grain growth and passivated trap states, ensuring the crystallization of high-quality space-confined CsPbI 3 nanocrystal films. This approach establishes a record-high external quantum efficiency (EQE) of 23.4% for deep-red PeLEDs, and achieves a maximum luminance of 10152 cd m −2 . Low roll-off is also demonstrated that EQE maintain over 20% under a high current density of 900 mA cm −2 , which is superior to state-of-the-art deep-red organic and quantum-dot LEDs. The T 50 operating lifetime is estimated to be 234 h at an initial radiance of 6.3 W sr −1 m −2 . This work provides an effectual strategy to accelerate radiative recombination and enhance the performance of CsPbI 3 -based deep-red PeLEDs.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
钙钛矿发光二极管
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DOI
PubMed
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-14
·
IF 17.694
Xu Zhichen,Chen Dongjuan,Li Tao,Yan Jiayu,Zhu Jiang,He Ting,Hu Rui,Li Ying,Yang Yunhuang,Liu Maili
Fast, inexpensive, and multiplexed detection of multiple nucleic acids is of great importance to human health, yet it still represents a significant challenge. Herein, we propose a nucleic acid testing platform, named MiCaR, which couples a mi crofluidic device with CRISPR- C as12a a nd multiplex r ecombinase polymerase amplification. With only one fluorescence probe, MiCaR can simultaneously test up to 30 nucleic acid targets through microfluidic space coding. The detection limit achieves 0.26 attomole, and the multiplexed assay takes only 40 min. We demonstrate the utility of MiCaR by efficiently detecting the nine HPV subtypes targeted by the 9-valent HPV vaccine, showing a sensitivity of 97.8% and specificity of 98.1% in the testing of 100 patient samples at risk for HPV infection. Additionally, we also show the generalizability of our approach by successfully testing eight of the most clinically relevant respiratory viruses. We anticipate this effective, undecorated and versatile platform to be widely used in multiplexed nucleic acid detection.
研究领域:
生物技术
·
分子生物学
·
医学诊断
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DOI
PubMed
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Zhao Yujing,Zhang Xiaowen,Liao Dandan,Qin Dekang,Huang Liyan,Cai Tao,Peng Ying,Chen Zhaowen,Hua Yilong,Wu Xiaoyan,Li Mi
Incorporating Fe 0 into
the porosity of silicon-based
materials can overcome the shortcomings of nanozero-valent iron (nZVI),
such as aggregation, passivation, and secondary release of reduction
products. The mass transfer resistance due to iron oxidation expansion
and consequent pore blockage during uranium reductive coprecipitation
remains unclear. The present work employed amino-functionalized mesoporous
silica (NH 2 –SGB) as the support to precisely regulate
the spatial occupancy rate of Fe 0 in the pores, and synthesized
a series of Fe 0 @NH 2 –SGB ( x -PV, x = 0.00, 0.33, 0.50, and 0.67) composites.
Batch experiments and structural characterization results illustrated
that Fe 0 @NH 2 –SGB (0.33-PV) achieved 97.0%
U(VI) removal and an equilibrium immobilization capacity of 48.3 mg·g –1 from 10 mg·L –1 initial U(VI)
solution at pH 5.0 with 0.2 g·L –1 added, and
a Langmuir-fitted theoretical maximum adsorption capacity of 449.43
mg·g –1 at room temperature, which is better
than that of 0.50-PV and 0.67-PV. The reserved redundant pore of Fe 0 @NH 2 –SGB (0.33-PV) can effectively accommodate
the iron–uranium coprecipitation products, maintain the unobstructed
mass transfer channels, and avoid the orifice blockage effect, resulting
in an effective utilization rate of Fe 0 to 98.2%, which
exceeded that of 0.67-PV (46.7%), the uranium fixation product achieved
a spatial fit of up to 89.1% pore volume and realized confined encapsulation
in the pore. Mechanistic analysis revealed that the immobilization
of U(VI) first took place on the surface of the sample via selective
trapping by −NH 2 groups. Subsequently, the Fe 0 and Fe(II) in the pores efficiently reduced U(VI) to U(IV)
and achieved stable self-sealing immobilization. Meanwhile, continuous
30-day static desorption tests and acid stress tests showed uranium
leaching rates consistently below 0.5%, confirming the long-term stabilization
effect of the confinement encapsulation strategy. It provides a novel
material design strategy for the rational design of confined nanomaterials
and the long-term immobilization of uranium in contaminated groundwater.
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高影响因子
Small
·
2023
·Vol. 19
·期 23
·2300106
·
IF 13.3
Ziqin Liu,Xin Dong,Jing Wen,Pu Hu,Chaoqun Shang
The high reactivity of Li metal and the inhomogeneous Li deposition leads to the formation of Li dendrites and “dead” Li, which impedes the performance of Li metal batteries (LMBs) with high energy density. The regulating and guiding the Li dendrite nucleation is a desirable tactic to realize concentrated distribution of Li dendrites instead of completely inhibiting dendrite formation. Here, a Fe-Co-based Prussian blue analog with hollow and open framework (H-PBA) is employed to modify the commercial polypropylene separator (PP@H-PBA). This functional PP@H-PBA can guide the lithium dendrite growth to form uniform lithium deposition and activate the inactive Li. In details, the H-PBA with macroporous structure and open framework can induce the growth of lithium dendrites via space confinement, while the positive Fe/Co-sites lowered by polar cyanide (−CN) of PBA can reactivate the inactive Li. Thus, the Li|PP@H-PBA|Li symmetric cells exhibit long-term stability at 1 mA cm −2 for 1 mAh cm −2 over 500 h. And the Li-S batteries with PP@H-PBA deliver favorable cycling performance at 500 mA g −1 for 200 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Guangwei Shao,Wenlong Huang,Xin Zhang,Junjie Pan,Minghao Li,Hongjie Li,Renbiao Zhang,Bixia Sun,Zhihao Li,Qiusen He,Wenfeng Hu,Siyi Bi,Huiqi Shao,Jinhua Jiang,Nanliang Chen
The extremely cold environment restricts certain activities, making the preparation of a material with both heating and insulation functions a significant challenge. This study presents the large space warp-knitted composite fabric (LSWCF) as an electric heating inflatable material with a three-dimensional structure. It is designed and developed from three modes to mitigate heat loss. The top layer of LSWCF is combined with the electric heating film as the heating layer, showing high electric heating efficiency (577.33 °C/(W·cm–2)), high electrothermal conversion efficiency (95%), and excellent conductivity (12.5 S/cm). The bottom layer of LSWCF is coated with TiO2/WPU coatings as a thermal radiation layer. The inflated LSWCF retains a substantial volume of still air within its middle layer and exhibits low thermal conductivity (0.037 W·m–1·K–1), with resulting minimization of heat loss due to convection and conduction. LSWCF’s radiant coating, on the other hand, reduces heat loss through directed radiation. Contributed to the structural design, the LSWCF demonstrates an enhanced ability to generate heat at low temperatures (up to 35 °C at −20 °C, 980 W·m–2) compared to the existing literature. This study offers a novel strategy for the development of materials for use in extremely cold environments.
研究领域:
材料科学
·
纺织工程
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DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Wenhao Wu,Yuan Lan,Yaxiong Zeng,Daohui Lin,Kun Yang
Organobentonites, i.e., bentonites coated with surfactants such as cetyltrimethylammonium (CTAB), are superior and low-cost sorbents for removal of organic contaminants from wastewater. Nonlinear sorption of polar organic compounds such as phenols and anilines by organobentonites were widely observed and interpreted by adsorption mechanism. However, in this study, it was observed that the nonlinear sorption of phenols and anilines by CTAB coated bentonites (CTAB-bentonites) should be attributed to nonlinear partition mechanism with the additional space limitation in CTAB-bentonites for nonlinear partitioning, rather than adsorption mechanism. This nonlinear partition mechanism is supported by that (i) organobentonites is a partition medium, identified by the linear isotherms of polycyclic aromatic hydrocarbons (PAHs) and nitrobenzenes ; (ii) sorption coefficients (log K d ), the ratio of adsorbed amount ( q e ) to equilibrium concentration ( C e ), and Dubinin-Ashtakhov (DA) model fitted sorption capacity (log Q 0 ) of organic compounds, by a given CTAB-bentonite, are positively correlated with their octanol-water distribution coefficients (log K OW ) and solubility in octanol (log S o ) respectively; (iii) log K d and log Q 0 of a given organic compound by CTAB-bentonites are positively correlated with organic carbon contents ( f oc ) of CTAB-bentonites, but not specific surface area. Specific interaction (i.e., hydrogen-bonding interaction), in addition to van der Waals force , is responsible for the nonlinear partitioning of phenols and anilines into CTAB-bentonites, because of the positively linear relationship between DA model fitted sorption affinity ( E ) and hydrogen-bonding donor parameter ( α m ) of organic compounds. These results could help the recognizing of the nonlinear sorption behaviors of organic compounds by organobentonites and promote their environmental applications in wastewater treatment .
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 27
·期 1
·95-105
·
IF 1.947
Xu Xiang,Zeng Yanning,Yu Caili,Zhang Faai
A series of mesoporous SBA-15 with various pore diameter (8, 15, 22 and 27 nm) were synthesized and used as “microreactor”. Reversible addition–fragmentation chain transfer (RAFT) polymerization of methyl methacrylate (MMA) was conducted in the channels of SBA-15 using azodiisobutyronitrile (AIBN) as initiator, ethyl xanthate ethyl propionate as chain transfer agent. The obtained PMMA/SBA-15 composites and neat PMMAs from composites were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption and desorption, Fourier transform infrared spectroscopy, thermogravimetry analysis, differential scanning calorimetry, hydrogen nuclear magnetic resonance. Results showed that compared with PMMA from conventional RAFT polymerization, PMMAs obtained from internal SBA-15 featured with narrower molecule weight distribution (1.34–1.55) and higher thermal stability due to confinement effects. With the increment of pore size of SBA-15, the molecular weight and glass transition temperature (T g ) of PMMA obtained from internal SBA-15 were distinctly improved whereas isotacticity of the PMMA decreased. The properties of the PMMA were managed with controllable RAFT polymerization by regulation the pore size of SBA-15.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Xiaoqing Cui,Xiaohui Liang,Jiabin Chen,Weihua Gu,Guangbin Ji,Youwei Du
Here, we report a unique core-shell nanocomposite of Fe 2 N@N-doped carbon that coats dopamine-derived carbon shells on porous Fe 2 N nanoparticles via a facile and effective soft chemical method . The feasibility of preparing core-shell structure in the process of polymerization is realized by utilizing the fact that affluent amino and hydroxyl groups in dopamine endow the formidable chelation ability with metal ions. Temperature-dependent volume shrinkage effect of Fe 2 N originates from the lattice transformation in nitridation process, which is the key factor to control the void space inside carbon nanocubes and optimize the electromagnetic performance. Consequently, the as-prepared samples achieve excellent reflection loss (RL) values and effective absorption bandwidth at an even thin thickness of 1.4 mm. The balance between the temperature-dependent conduction loss and the optimization of hole structure impedance matching may be responsible for the excellent microwave behaviors. This work offers an attractive core-shell Fe 2 N@carbon with controllable void space as a promising candidate to handle the electromagnetic interface (EMI) issues.
研究领域:
材料科学
·
纳米技术
·
电磁学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）