Nature Communications
·
2021
·Vol. 12
·期 1
·1-10
·
IF 14.919
Chen Mengxiao,Wang Zhe,Zhang Qichong,Wang Zhixun,Liu Wei,Chen Ming,Wei Lei
The well-developed preform-to-fiber thermal drawing technique owns the benefit to maintain the cross-section architecture and obtain an individual micro-scale strand of fiber with the extended length up to thousand meters. In this work, we propose and demonstrate a two-step soluble-core fabrication method by combining such an inherently scalable manufacturing method with simple post-draw processing to explore the low viscosity polymer fibers and the potential of soft fiber electronics. As a result, an ultra-stretchable conductive fiber is achieved, which maintains excellent conductivity even under 1900% strain or 1.5 kg load/impact freefalling from 0.8-m height. Moreover, by combining with triboelectric nanogenerator technique, this fiber acts as a self-powered self-adapting multi-dimensional sensor attached on sports gears to monitor sports performance while bearing sudden impacts. Next, owing to its remarkable waterproof and easy packaging properties, this fiber detector can sense different ion movements in various solutions, revealing the promising applications for large-area undersea detection.
研究领域:
材料科学
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电子工程
·
传感器技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 16
·7863-7876
·
IF 4.682
Liu Shixin,Du Mingrun,Ge Yanfeng,Li Zepeng,Srivastava Gyaneshwar P.,Wang Jinhua,Wei Tong,Zou Yunling,Li Xiaodong,Li Yanchun,Wang Mingchao
High entropy oxides are novel materials with diverse compositions that have received significant interest for their mechanical and photocatalytic properties. In this study, we enhanced the mechanical and photocatalytic performance of solid state fabricated high entropy oxide (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Y 0.2 ) 2 Zr 2 O 7 through Eu doping. Samples doped with different Eu ion concentrations demonstrated good thermal stability under high temperature without phase transformation after sintering at 1500 °C. We performed high pressure X -ray diffraction measurements and found that bulk modulus and critical pressure were improved by approximately 30 GPa and 5 GPa, respectively. This significant compression difference confirmed that Eu doping enhanced structural stability under high pressure. (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Y 0.2 ) 1.98 Eu 0.02 Zr 2 O 7 demonstrated the best photocatalytic performance, with a kinetic constant about 1.5 times that of undoped samples. The appropriate doping concentration, smaller grain size and wider light absorption range contribute to the better photocatalytic performance irradiated under UV light. This work provides valuable insights for the design and improvement of high entropy oxide mechanical and photocatalytic performance. Graphical abstract
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2024
·Vol. 18
·期 8
·1-12
·
IF 4.3
Chun Weilong,Yang Chenbiao,Wang Xu,Yang Xin,Chen Huiyong
A facile synthesis of hierarchical ZSM-5 with the three-dimensionally ordered mesoporosity (3DOm ZSM-5) was achieved by solid conversion (SC) of SiO 2 colloidal crystals to high-crystalline ZSM-5. The products of 3DZ5_S/C and 3DZ5_S, which were severally transformed from the carbon-padded SiO 2 colloidal crystals and the initial SiO 2 colloidal crystals, exhibited not only a similar ordered structure and acidity but also higher crystallinity and more balanced meso-/micropore combination in comparison with 3DZ5_C obtained by the conventional confined space crystallization approach. All three synthesized 3DZ5 catalysts showed improved methanol-to-propylene performance than the commercially microporous ZSM-5 (CZ5), embodied in five times longer lifetime, higher propylene selectivity and S propylene / S ethylene ratio ( P/E ), and superior coke toleration with lower formation rate of coke ( R coke ). Moreover, the 3DZ5_S catalyst in situ converted from SiO 2 colloidal crystals presented the highest selectivities of propylene (42.51%) and light olefins (74.6%) among all three 3DZ5 catalysts. The high efficiency in synthesis and in situ utilization of SiO 2 colloidal crystals demonstrate the proposed SC strategy to be more efficiently and eco-friendly for the high-yield production of not only 3DOm ZSM-5 but also other types of hierarchical zeolites.
研究领域:
材料科学
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催化化学
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能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 27
·21737-21745
·
IF 2.779
Lin Feng Li,Liu Bing,Song Kai Xin
NaLaMgWO 6 microwave dielectric ceramics have been synthesized via the standard solid-state reaction method. The Rietveld refinement of the X-ray diffraction patterns indicates that NaLaMgWO 6 crystallizes in a monoclinic crystal structure with a C 2/ m space group. Raman spectrum of the NaLaMgWO 6 ceramic is collected, and the correlations between the Raman active modes and chemical bond vibrations are systematically identified. The optimum microwave dielectric properties are obtained when sintered at 1550 °C, with ε r = 17.1, Q f = 26,150 GHz, and τ f = − 83.4 ppm/°C. A microstrip patch antenna operating at the sub-6 GHz band is fabricated using the NaLaMgWO 6 ceramic as the substrate. The fabricated antenna resonates at 3.82 GHz, which exhibits an excellent S 11 value of − 26 dB, a minimum VSWR value of 1.07, and a satisfactory simulated efficiency of 72.2%. The good antenna performance demonstrates the great application potential of NaLaMgWO 6 ceramic in the sub-6 GHz band antennas.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2021
·Vol. 64
·期 7
·1184-1191
·
IF 9.445
Gao Mengen,Wu Hongping,Yu Hongwei,Hu Zhanggui,Wang Jiyang,Wu Yicheng
Deep-ultraviolet (UV) nonlinear optical (NLO) crystals with excellent performances are of great importance in laser science and technology. However, to design and synthesize an ideal deep-UV NLO material with a balance between second harmonic generation (SHG) response and UV cut-off edge is still a huge challenge. Herein, a new oxy-borate BaYOBO 3 (BaYBO) was designed and synthesized by substituting Be 2+ with Y 3+ from Sr 2 Be 2 B 2 O 7 . The BaYBO features a stable three-dimensional framework and satisfies the property balance between a large SHG response (~2.6×KH 2 PO 4 (KDP)) and a short UV cut-off edge (<190 nm) as a promising deep-UV NLO candidate. The study of structure-property relationship indicates that the large SHG response of BaYBO is mainly attributed to the coplanar arrangement and large number density of BO 3 triangles. These results demonstrate that substituting Be 2+ with Y 3+ cations is also a feasible strategy for developing new deep-UV NLO crystals.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ANALYTICAL SCIENCES
·
2022
·Vol. 38
·期 10
·1277-1287
·
IF 1.967
Liu Cuicui,Zhao Buyi,Liu Xiaobing,Zhang Ailin
A novel capillary electrochromatography method has been developed for the simultaneous quantification of ten benzimidazole fungicides in fruits. Herein, covalent organic frameworks (COFs) and ionic liquids (ILs) were successfully introduced to prepare open-tubular capillary column to improve the loading capacity and separation performance. The parameters effecting the analytical performance including pH and concentration of running buffer, separation voltage and the addition of organic solvent were investigated systematically. Under the optimized conditions, the method allowed the baseline separation of ten benzimidazole fungicides, and showed a good linearity in the range of 3.5–200 μg kg −1 with the detection limits between 1.0 and 2.8 μg kg −1 . The intraday and interday precisions for recoveries were lower than 7.9% and 12.2%, respectively. Intraday and interday precisions for their retention times were lower than 3.2% and 6.6%, respectively. Satisfactory recoveries for grape, pear and orange samples at two concentrations were obtained ranging from 85.0 to 95.9% with RSDs lower than 7.8%, demonstrating the potential applications of the open-tubular capillary electrochromatography method for trace benzimidazole fungicides analysis in fruits. Graphical abstract
研究领域:
分析化学
·
食品安全
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 21
·18360-18369
·
IF 2.22
Wang Mengmeng,Tao Yueming,Zhang Dongyun,Sun Guanghan,Feng Ping,Chang Chengkang
Na 3–2 x Mg x V 2 (PO 4 ) 3 /C (0 ≤ x ≤ 0.2) were synthesized by a sol–gel method. According to X-ray diffraction (XRD) Rietveld refinement and energy dispersive spectroscopy (EDS) mapping results, Mg ions were approved to occupy the Na2 (18e) site in Na 3–2 x Mg x V 2 (PO 4 ) 3 /C for the first time. The amount of Mg substitution in Na 3–2 x Mg x V 2 (PO 4 ) 3 /C was optimized. The specific discharge capacities of Na 2.9 Mg 0.05 V 2 (PO 4 ) 3 /C at 10 C, 20 C, and 30 C were 98.9%, 91.5%, and 76.2% of the value obtained at 1 C, respectively. Na 2.9 Mg 0.05 V 2 (PO 4 ) 3 /C exhibited the highest capacity retention of 80.3% with a discharge capacity of 77.3 mAh·g −1 after 1200 cycles at 10 C. Na 2.9 Mg 0.05 V 2 (PO 4 ) 3 /C exhibited superior rate performance, resulting from a high sodium diffusion coefficient ( D Na ) of 3.91 × 10 –12 cm 2 ·s −1 and the excellent electrical conductivity (5.7 × 10 –2 s·cm −1 ). Combining the X-ray photoelectron spectroscopy (XPS) and Electrochemical impedance spectroscopy (EIS) results, the mechanism of Mg substitution was investigated. Since two Na + were replaced by one Mg 2+ , \({\mathrm{V}}_{\text{Na}}^{^{\prime}}\) was produced to maintain valence equilibrium. This phenomenon benefited Na + migration by broadening the diffusion channel in the structure of Na 3 V 2 (PO 4 ) 3 . According to the EPR results, the signal intensity of Na 2.9 Mg 0.05 V 2 (PO 4 ) 3 /C was much stronger than that of Na 3 V 2 (PO 4 ) 2 /C, thus confirming the existence of \({\mathrm{V}}_{\text{Na}}^{\mathrm{^{\prime}}}\) after Mg substitution. When the amount of Mg substitution was further increased to 0.1, the D Na decreased because of the small radius of Mg 2+ , which led to severe lattice distortion and volumetric shrinkage of the unit cell.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 4
·1949-1954
·
IF 1.938
Zhang Dunpu,Zhen Yue,Chang Qing,Zhang Hui
Highly crystalline β-NaLuF 4 :Ln 3+ microstructures were successfully prepared via a mixed NaCl-KCl flux cooling approach. The chemical reaction process and the formation mechanism have been carefully investigated by XRD, SEM, TEM and PL characterizations. Interestingly, as the reaction time is prolonged, the crystalline structure of NaLuF 4 changes from α-phase to β-phase, while the granule shape transfers from nanoparticles to solid microsheets then to porous microsheets. By altering the kinds of doped lanthanide ions, upconverting and downconverting luminescence with multi-colour outputs (red, green and blue) can be realized in β-NaLuF 4 :Ln 3+ (Ln = Yb, Er, Tm, Ce, Tb and Eu). This strategy is not only expected to meet the ever-increasing commercial demand, but also offers an alternative in synthesizing rare earth fluorides.
研究领域:
材料科学
·
光学
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 24
·11202-11214
·
IF 4.682
Liu Linxiang,Zhang Jiaqi,Shi Ge,Zhang Huili,Wang Bing,Zhong Linxin
Recently, wearable electronic devices and human–computer interaction are developing prosperously, which expands the requirement of flexible sensing materials. Graphene and its derivatives with extraordinary advantages are highly attractive precursors. However, it is difficult to assemble graphene into macroscopic cubes with good fatigue resistance performance. Here, we propose an efficient way to manufacture a lamellar-structural rGO aerogel with enhanced stiffness and deflection of lamellae, by using MXene as a rigidity additive. The addition of MXene (Ti 3 C 2 T x ) improves the mechanical and fatigue resistance properties of the aerogel, making it super compressible and elastic. The highly stable structure of the aerogel can withstand extremely high compressive strain of 90% and long-term compression at 50% strain for at least 10,000 cycles. The lamellar structure makes a great contribution to achieve good sensing performance including high linear sensitivity, low testing limit, wide testing strain range and quick response. These features make the MXene/rGO aerogel a promising sensing material for flexible wearable devices to monitor the subtle and obvious biosignals of the human body movement. Graphical abstract
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOM
·
2022
·Vol. 74
·期 5
·1934-1944
·
IF 2.597
Liu Peiwen,Fei Zitong,Zhang Yingjie,Dong Peng,Meng Qi,Yang Xi
Developing a green and efficient approach for recovering Li from cathode materials is important in recycling spent LiFePO 4 batteries. A facile and efficient oxidation process was developed to selectively recover Li from spent LiFePO 4 batteries. The common oxidant NaClO was used to avoid using acid or alkali in the leaching process. The leaching rate of Li reached 99.8% under the selective optimal leaching conditions of 0.54 mol/l NaClO, leaching time 60 min, leaching temperature 60°C and solid–liquid ratio 1 g/l. The high leaching efficiency can be ascribed to the combination of oxidability and high pH value of the NaClO solution. Meanwhile, leaching and precipitation were carried out simultaneously in this process, which promoted the leaching reaction. High performance LiFePO 4 /C was resynthesized using the recovered products. The specific capacity of the first discharge at 1 C was 147.1 mAh/g and the capacity retention rate at 1 C was 97.55% after 200 cycles. The oxidation approach is acid free and has low energy consumption for green recovery of spent LiFePO 4 batteries.
研究领域:
材料科学
·
环境科学
·
能源技术
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 29
·期 1
·605-617
·
IF 5.044
Gao Shan,Li Hongqiang,Guan Hang,Zheng Longzhu,Lai Xuejun,Chen Wanjuan,Zeng Xingrong
The inherent hydrophilicity, flammability and electrical insulation of pristine cotton fabric (CF) severely restrict their applications in many traditional fields including tents, umbrellas and outdoor jackets and some emerging fields such as wearable electronics. Herein, we report a facile approach to fabricate multifunctional CF with superhydrophobicity, flame-retardancy and electrical conductivity via layer-by-layer assembly and spray-coating. Specifically, the pristine CF was alternately covered with branched polyethyleneimine modified halloysite nanotubes (P-HNTs) and phytic acid (PA), followed by a sprayed layer of octadecylamine modified carboxylated carbon nanotube (CNT-ODA)/polydimethylsiloxane (PDMS) hybrid coating. The obtained multifunctional CF exhibited superhydrophobicity with a high water contact angle (WCA) of 162° and excellent surface stability. Owing to the physical barrier roles of the HNT layer, intumescent char layer by the N-P synergy of b-PEI and PA and the CNT/Si–C compounds after the pyrolysis of the outer CNT-ODA/PDMS layer, the SFRC-CF exhibited good thermal stability and outstanding flame-retardant performance. Furthermore, the SFRC-CF based piezoresistive pressure sensor had the advantages of stable resistance signal and good repeatability, and was successfully applied for detecting different human behavior even under wet environment. Our findings conceivably stand out as a new methodology to fabricate multifunctional cotton fabrics for practical applications in the fields of wearable devices and flexible electronics. Graphic abstract
研究领域:
材料科学
·
纺织工程
·
可穿戴设备
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2022
·Vol. 24
·期 4
·1-15
·
IF 2.533
Wang Zhentao,Hasan Jaafar,Wang Jingjing,Zhang Caiwei,Iqbal Waheed,Chang Ninghui,Qin Chuanguang
The treatment of dye-bearing wastes by adsorption using low-cost synthetic adsorbents is urgently needed and challenging because it offers the dual benefit of water treatment and waste management. Herein, the flower-like MoS 2 /g-C 3 N 4 nanocomposites with a size range of 200–400 nm and a specific surface area of 70.656 m2/g were synthesized as new methylene blue (MB) adsorbent materials. Their adsorption mechanisms and influences of pH, adsorbent dosage, concentration, and temperature on the adsorption properties were investigated by batch sorption experiments. Adsorption isotherm data were fitted with the Langmuir model, and the adsorption kinetic characteristics conform to the quasi second-order kinetic equation. According to thermodynamic data, methylene blue (MB) adsorption was endothermic and spontaneous, exhibiting a maximum adsorption capacity of 278.4 mg/g at 45 °C. Additionally, the impact of MB effluent on the germination of chickpea and wheat was studied contrastively with treatment of the tested materials. The results indicated that adequate adsorption of flower-like MoS 2 /g-C 3 N 4 nanocomposite could potentially treat wastewater from the textile industry to be used for irrigation and solve the problem of textile effluent disposal. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）