Nano Research
·
2023
·
IF 9.9
Xing Chenyu,Chen Gaoyu,Zhu Xia,An Jiakun,Bao Jianchun,Wang Xuan,Zhou Xiuqing,Du Xiuli,Xu Xiangxing
Carbon dots (CDs) have wide application potentials in optoelectronic devices, biology, medicine, chemical sensors, and quantum techniques due to their excellent fluorescent properties. However, synthesis of CDs with controllable spectrum is challenging because of the diversity of the CD components and structures. In this report, machine learning (ML) algorithms were applied to help the synthesis of CDs with predictable photoluminescence (PL) under the excitation wavelengths of 365 and 532 nm. The combination of precursors was used as the variable. The PL peaks of the strongest intensity ( λ s ) and the longest wavelength ( λ l ) were used as target functions. Among six investigated ML models, the random forest (RF) model showed outstanding performance in the prediction of the PL peaks.
研究领域:
材料科学
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化学
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光电技术
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生物学
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医学
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量子技术
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC COMMUNICATIONS
·
2024
·
IF 1.8
Xiaoyun Ma,Xiaoyan Wan,Jun Zhao
A method for the preparation of nitriles from primary amides using trichloroacetonitrile and a catalytic amount of cupric acetate is described. Using this method, amides including aromatic amides, aromatic heterocyclic amides and aliphatic amides were converted into the corresponding nitriles in moderate to good yields. Trichloroacetonitrile reacted with amide in the presence of cupric acetate to form trichloroacetamide, which has been isolated and confirmed.
研究领域:
有机化学
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合成化学
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Chenglei He,Lingjun Zeng,Bai Xue,Xingxing Zhang,Liya Yu,Lan Xie,Qiang Zheng
Along with the increasingly serious electromagnetic interference (EMI) pollution, it is in urgent need of exploiting high-performance EMI shielding materials. However, the conventional experimental methods always require a series of tedious preparation and characterization processes, resulting in the long period and high cost. Herein, a fully connected neural network (FCNN) was applied to aid in exploiting silver nanowires/waterborne polyurethan/multi-walled carbon nanotubes (AgNWs/WPU/MWCNTs) EMI shielding aerogels with asymmetric structures to optimize new material evolution and reduce experiment burden. Firstly, the special AgNWs/WPU/MWCNTs aerogels were fabricated with various MWCNTs content (0 wt%, 2 wt%, and 4 wt%) and AgNWs mass (10 mg, 20 mg, 30 mg, and 40 mg) via a combination of directional freezing and spraying procedures, leading to 12 distinct samples. AgNWs/WPU/MWCNTs aerogels hold excellent EMI shielding properties and absorption-dominant shielding mechanism. The experimental EMI shielding effectiveness (SE) data at different frequency were leveraged to establish, train, and test the FCNN model based on Adam optimizer (Adam-FCNN). It is worth noting that Adam-FCNN model predictions are in good accordance with the EMI SE of the physically measured samples, with the lowest root mean square error RMSE of 0.7899, the highest correlation coefficient (R) of 0.9895, and excellent computational efficiency and reliability. Moreover, Adam-FCNN can accurately prognosticate EMI SE of unobtained AgNWs/WPU/MWCNTs aerogels in mechanics-intuitions to reduce repeated preparation and characterizing conditions. Thereby, Adam-FCNN soft model approach opens significant potential for alleviating the experimental burden, accelerating the discovery of innovative materials, and exploring the complex mechanism.
研究领域:
材料科学
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人工智能辅助材料设计
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产品关联
DOI
高影响因子
MATERIALS SCIENCE-POLAND
·
2020
·Vol. 38
·期 3
·502-507
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IF 0.911
Meihua Hu,Ning Bi,Mingming Liu,Guangjin Gao,Shangsheng Li,Taichao Su
The improved TiB2 ceramics were obtained in sintering process at the pressure of 5.5 GPa and temperature of 1550 °C in presence of metallic Co powder. The effect of Co content (ranging from 0 wt.% to 10.0 wt.%) on the phase composition, density, microstructure, Vickers hardness and thermal conductivity of TiB2 ceramics was analyzed. A small amount of new phase Co2B has been created in the reaction of TiB2 and Co. The relative density of sintered TiB2 ceramics reached 98.1 %. When the mass fraction of Co increased, the porosity increased, while the hardness first increased and then decreased. The maximal Vickers hardness values were equal to 33.3 GPa or 28.2 GPa when the used load was of 4.9 N or 9.8 N, respectively. The highest reached value of thermal conductivity was 88.9 W˙m−1 ˙ K−1. The dense TiB2 ceramics with improved hardness and thermal conductivity were ascribed to the high pressure sintering method and Co sintering aid. High pressure sintering method provides a new way for the preparation of ceramics materials.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Rui-You Jian,Chia-Chen Li
This research investigates challenges associated with gelation in Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) slurry preparation for solid-state Li-ion batteries. Gelation arises from a cross-linking reaction between the sintering aid , boron oxide (B 2 O 3 ), and the poly(vinyl butyral) (PVB) binder. With increasing B 2 O 3 content, LLZTO slurry viscosity dramatically rises, resulting in unsuitable solid-like behavior for tape casting. The alkaline nature of LLZTO powder intensifies cross-linking, a phenomenon confirmed through boron-11 nuclear magnetic resonance spectroscopy. To mitigate gelation, diol compounds, such as ethylene glycol, are introduced to deactivate B 2 O 3 -PVB cross-linking, with selection guided by support from density functional theory-based simulations.
研究领域:
材料科学
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化学
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固态电池
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Ying Wang,Minhao Yin,Huayang Bao,Xiaobing Zhao,Guanggui Cheng,Ningyi Yuan,Jianning Ding
The practical application of magnesium alloy was limited greatly by the inherent poor corrosion- and wear-resistance. Herein, a composite coating composed of graphene oxide (GO), bis[3-(triethoxysilyl)propyl]tetrasulfide and octadecyltrimethoxysilane was prepared by spin-coating. Due to the cross-linking between silanes and GO, the so-obtained composite coating was more compact and less porous as compared with the coating of GO. The hydrophobicity was enhanced by the -S-S-S-S- moiety and high-density CH 2 group in the silane chain; consequently, the so-obtained composite coating having the contact angle of about 140° was more hydrophobic as compared with the coating of GO (about 10°). Such a composite coating with higher hydrophobicity, denser siloxane networks and more compacter layered GO could slow down the permeation of corrosion medium and prolong the corrosion path. It was found that, compared to that of the Mg alloy substrate, the E corr of the composite coating increased by 713 mV and the i corr value decreased by nearly three orders of magnitude. Moreover, the composite coating possessed excellent wear resistance due to the intrinsic layered structure of GO and the good lubricity of silane.
研究领域:
材料科学
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表面工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yujuan Yang,Zhiqiang Deng,Qiufeng Huang,Zhonghua Deng,Zhuguang Liu,Jiquan Huang,Jian Chen,Wang Guo
In this study, aluminum isopropoxide (AIP) served as a sintering additive, and 0-10 at% AIP:YAG transparent ceramics were fabricated through vacuum sintering within the temperature range of 1650–1790 °C. It was found that after undergoing calcination at 800 °C, AIP transformed into a nanoscale γ-Al 2 O 3 coating layer on the surface of the precursor particles within the YAG green compacts. This γ-Al 2 O 3 coating layer not only accelerated the phase transformation rate of YAG but also boosted the densification rate of YAG ceramics when the temperature was below 1700 °C. Moreover, AIP was ultimately converted into α-Al 2 O 3 , thereby preventing the introduction of impurity ions. A doping concentration of 1.0–1.5 at% has been validated as an optimal range for AIP in YAG ceramics. The in-line transmittance of 1.0-1.5 at% AIP:YAG ceramics was significantly higher than that of 0 at% AIP:YAG ceramic at 1700 °C. While the temperature was further increased to 1790 °C, the positive effect of AIP became less pronounced. These findings indicate that AIP holds great promise as a sintering activity promoter for YAG transparent ceramics.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Zhangyue Shen,Xiuqin Wang,Xianbing Xu,Shengjie Li,Yuanyuan Liu,Yugang Wang,Hairong Sun,Zhenhua Zhu,Jinfeng Pan
This study modified cellulose nanocrystals (CNC) with casein (CA) using ultrasound (U). Ultrasound treatment (U-CA-CNC) reduced particle size and created uniform filamentous networks compared to just CA-CNC. Analysis showed enhanced hydrogen bonding between CA and CNC due to ultrasound. U-CA-CNC and CA-CNC significantly improved interfacial properties: contact angle increased while interfacial tension decreased sharply. Consequently, high internal phase emulsions (HIPEs) stabilized by these modified particles, especially at CA:CNC ratios of 1:1.5 or 1:2, had smaller droplet sizes, higher elasticity (G'), and higher viscosity. These HIPEs remained stable without delamination after 15 days at 4 °C when inverted and showed lower oxidation (TBARS). Ultrasound effectively improved the CA-CNC interfacial properties, enabling stable HIPEs with enhanced rheology.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Functional Materials Letters
·
2023
·
IF 1.3
Congqiang Gao,Junjie Zhou,Qi Zhang,Peng Cui,Qing Zhang,Wei Wei
NASICON-type Li 1 . 5 Al 0 . 5 Ge 0 . 5 P 3 O 1 2 (LAGP) is one of the most promising inorganic solid-state electrolytes (SSEs). However, its practical applications have been hindered due to the high grain boundary resistance and poor sintering performance. In this work, we introduce a novel LiBF 4 sintering aid into LAGP to promote the growth of grains, decrease grain boundary resistance, and supplement the loss of lithium. The experimental results show that the ionic conductivity of LAGP-0.5 wt% LiBF 4 has the highest ionic conductivity (3.21 × 10 − 4 S/cm), grain boundary impedance decreases from 162.2 Ω to 35.2 Ω , the relative density increases from 93.6% to 96.5%, and no impurity phase is observed in LAGP–0.5 wt% LiBF 4 . At the same ionic conductivity, the sintering temperature of LAGP without LiBF 4 and with a small amount of LiBF 4 decreases from 800 ∘ C to 700 ∘ C. The Li/LAGP-LiBF 4 /LiFePO 4 cell presents excellent cyclic stability (capacity retention of the discharge capacity is still 117.5 mAhg − 1 after 100 cycles) and a high initial discharge capacity of 164.2 mAhg − 1 at 0.2 C.
研究领域:
材料科学
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电化学
·
储能技术
·
陶瓷
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 25
·11774-11782
·
IF 4.682
Liu Limin,Liang Dongshi,Zhou Xiaoliang,Liu Yujian,Su Jiawen,Xu Yao,Peng Jinsong
NASICON-type material Na 1+ x Zr 2 Si x P 3− x O 12 (0 ≤ x ≤ 3) is considered to be one of the most promising solid-state electrolytes that can be applied in all-solid-state sodium batteries (SSNBs). However, further increasing the ionic conductivity of Na 1+ x Zr 2 Si x P 3− x O 12 (0 ≤ x ≤ 3) to obtain higher performance electrolyte materials is still a challenge for its practical application. Herein, the Na 3.4 Zr 2 Si 2.4 P 0.6 O 12 (NZSP) powder is prepared by the solution-assisted solid-state reaction (SA-SSR), and solid-state electrolytes with excellent electrochemical properties are obtained by doping with NaF as a sintering aid. With the increase of NaF doping, the crystal structure of NZSP is changed as well as a slight excess of Na + may increase the bottleneck size of the crystal, so that it enhances the migration ability of Na + in the crystal. Also, NaF as a sintering aid lowers the sintering temperature, increases the densities and improves the effective contact between crystals, which reduces the grain boundary impedance of NZSP. However, the excessive NaF dopant leads to the generation of microcracks decreasing the Na + conducting and mechanical properties of solid-state electrolytes. Using this simple and low-cost strategy of NaF doping, NZSP-0.3NaF achieves an excellent conductivity of 4.98 mS cm −1 with unexpectedly low activation energy of 0.227 eV. Therefore, this composition is one of the few electrolytes with high conductivity reported so far and is a competitive option for solid-state sodium batteries.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源材料
·
无机非金属材料
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Zhaohuan Li,Jianmin Xiao,Chaowen Chen,Lina Zhao,Zhengyan Wu,Lichao Liu,Dongqing Cai
Desertification and eutrophication are two global environmental problems human beings face. Inoculating cyanobacteria to form biocrusts is considered an effective technology to inhibit desertification. The main limitation of biocrust formation is the lack of propagules and nutrients in deserts. A possible low cost source of propagules and nutrients is eutrophic water containing aquatic cyanobacteria (AC), nitrogen and phosphorus. In this study, we fabricated a network-structured nanocomposite (designated as MC) using a metal-organic framework (MOF) and carboxymethyl cellulose (CMC). MC, with a large specific surface area and numerous surface groups, had a high retention capacity for water and nutrients and good biosafety. The combination of AC-containing water (ACW) and MC could provide a suitable microenvironment in the soil, promote the growth of desert cyanobacteria (DC), formation of biocrusts and inhibition of desertification. This study provides a novel approach to simultaneously relieve desertification and eutrophication.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2015
·
IF 1.698
Huacheng Cai,Wendong Wang,Peiwen Liu,Guangming Wang,Ankang Liu,Zhe He,Zhaofang Cheng,Shengli Zhang,Minggang Xia
We demonstrate tin (Sn) nanowires growth enhanced by Selenium (Se) atoms via physical vapor transport (PVT) method. The Raman spectroscopy, X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy show that Sn nanowires are synthesized with a large quantity, good quality and high purity of Sn. The growth of Sn nanowires is attributed to Solid–Vapor–Liquid mechanism. The effects of gold nanoparticles catalyst, Si substrate, and Se atoms on Sn nanowires growth are discussed in detail. We find that Se atom plays a key role in the growth of Sn nanowires. The gaseous Sn atoms are absorbed by the eutectic alloy droplets of Se–Au at first. Then Sn atoms precipitate at the liquid–solid phase interface due to a supersaturated solution and form a one-dimensional nanostructure. In all, this PVT method could provide a simple and quick way to synthesize monocrystalline Sn nanowires with an advantage in both quality and quantity. The optical transmittance of Sn nanowires thin film with 2 μm 2 density approaches 85–90% in visible wavelength. Therefore, the Sn nanowires thin film can be applied to transparent electrode along with their metallic property.
研究领域:
材料科学
·
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）