CHEMICAL COMMUNICATIONS
·
2015
·Vol. 51
·期 15
·3227-3230
·
IF 6.834
Maowen Xu,Jun-Ke Hou,Yu-Bin Niu,Guan-Nan Li,Yu-Tao Li,Chang Ming Li
Na2.65Ti3.35Fe0.65O9 rods were prepared by a simple solid-state route and coated with carbon to enhance their electronic conductivity. For the first time, Na2.65Ti3.35Fe0.65O9 was explored as an anode material for Na-ion batteries to deliver a discharge capacity of 137.5 mA h g−1 at a current rate of 40 mA g−1. The charge/discharge capacity of a carbon-coated sample increased by 46.3% to achieve 201.1 mA h g−1.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 47
·期 5
·6548-6553
·
IF 3.83
Chuangchuang Ruan,Hongzhang Song,Mengmeng Fan,Haoshan Hao,Shaohui Liu
Misfit-layered oxides Ca 3 Co 4 O 9+δ + z wt% SiC ( z = 0.00, 0.025, 0.05, 0.1, 0.2) samples were synthesized using solid-state sintering method and the effects of SiC nanoparticles diapersion on the thermoelectric properties were investigated. Thermoelectric properties of Ca 3 Co 4 O 9+δ + z wt% SiC ( z = 0.00, 0.025, 0.05, 0.1, 0.2) were investigated up to 923 K. Compared with pure sample, the electrical resistivity of SiC-added samples reduces, for Ca 3 Co 4 O 9+δ + z wt% SiC ( z = 0.00, 0.025, 0.05, 0.1, 0.2) ceramic samples with x ≤ 0.05, the electrical resistivity decreases with increasing SiC nanoparticles adding amounts. And, the electrical resistivity exists transition from semiconductor to metal conduction mechanism. While, the thermal conductivity also decreases due to the addition of SiC nanoparticles . As a result, the Ca 3 Co 4 O 9+δ + 0.2 wt% SiC sample had the lowest thermal conductivity of 1.47 W/Km at 923 K, which was 18.4% lower than that of the Ca 3 Co 4 O 9+δ sample. The ZT value of Ca 3 Co 4 O 9+δ + 0.05 wt% SiC can reach 0.218, which is 40.9% higher than the pure Ca 3 Co 4 O 9+δ sample.
研究领域:
材料科学
·
凝聚态物理
·
无机非金属材料
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 10
·9983-9988
·
IF 2.195
Ma Panfei,Zhang Huimin,Chen Mingxing,Liu Ting,Chang Aimin,Su Zhi
Highly dense LaCrO 3 negative temperature coefficient (NTC) thermistor ceramics by low-heating solid-state method have been successfully synthesized in air ambient. The X-ray diffraction analysis has shown that both of the calcined powders and as-sintered ceramics crystallize in a perovskite structure. The relative densities of the ceramics synthesized by Cr(NO 3 ) 3 ·9H 2 O and the ceramics synthesized by CrCl 3 ·6H 2 O are 91% and 65%, respectively. The relationship between lnρ and 1000/T shows an approximate line in the measured temperature range. The values of ρ 25 and B 0/25 of the ceramics synthesized by Cr(NO 3 ) 3 ·9H 2 O and the ceramics synthesized by CrCl 3 ·6H 2 O are 424.8 Ω cm, 3252 K and 1835.9 Ω cm, 3636 K, respectively.
研究领域:
材料科学
·
无机非金属材料
·
电子陶瓷
·
热敏材料
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Zhiping Zhang,Yuenan Wang,Yang Lei,Fang Zhang,Xiaobing Chen,Hongfei Liu
Negative thermally expanded (NTE) (KMg) x Sc 2-x (WO 4 ) 3 (0 = x ≤ 1.5) ceramics have been prepared via solid-state reaction. X-ray diffraction (XRD) analysis reveals that (KMg) x Sc 2-x (WO 4 ) 3 undergoes a composition-induced phase transition as the (KMg) 3+ -substitution content increases. For x = 0.25, both hexagonal (KMg) x Sc 2-x (WO 4 ) 3 and orthorhombic Sc 2 (WO 4 ) 3 coexisted in the sample. For 0.25 < x ≤ 1, a single-phase, hexagonal (KMg) x Sc 2-x (WO 4 ) 3 , was obtained. When x is further increased to 1.25, monoclinic MgWO 4 impurity was detected in the sample. Meanwhile, as x increases, the grain size of (KMg) x Sc 2-x (WO 4 ) 3 ceramics grows up. Hexagonal (KMg) x Sc 2-x (WO 4 ) 3 ceramics show high densification and strong NTE property. Thermomechanical analysis indicates that the linear coefficients of thermal expansion (CTEs) of hexagonal (KMg) x Sc 2-x (WO 4 ) 3 ceramics decrease from −7.48 × 10 −6 °C −1 to −14.06 × 10 −6 °C −1 with the increase of x. High-temperature XRD analysis reveals that hexagonal (KMg) 0.5 Sc 1.5 (WO 4 ) 3 show an anisotropic NTE. The intrinsic linear CTEs are α a = α b = −6.74 × 10 −6 °C −1 , α c = 11.03 × 10 −6 °C −1 and the volumetric CTE is α v = −2.52 × 10 −6 °C −1 .
研究领域:
材料科学
·
无机非金属材料
·
功能陶瓷
·
热学性能
·
结构与物性
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Jiajie Pan,Youjie Hua,Zhanhao Fan,Hongping Ma
Far-red light plays a crucial role in the field of plant lighting. Herein, a novel far-red phosphor BaAl 2 Si 3 O 4 N 4 : Sm 2+ , which can be effectively excited by blue light, was successfully prepared by high-temperature solid-state reaction. The PL spectrum show a broadband emission range from 600 nm to 950 nm (FWHM = 120 nm), which is well matched with the absorption of P FR in plant. In BaAl 2 Si 3 O 4 N 4 : Sm 2+ , the Ba 2+ are coordinated with three N and six O atoms. When the rare earth ion of Sm 2+ was doped into the host lattice , Ba 2+ was partially replaced by Sm 2+ . The low temperature PL spectra at 8–80 K were studied in detail. It was found that the PL spectra at low temperature were composed of some sharp lines and broadband superposition, which corresponding to the 5 D 0 - 7 F J (J = 0–4) energy level transition of Sm 2+ . It is shown that the broadband emission of the phosphor was caused by the broadening of the 4f 5 5 d 1 energy level due to the strong crystal field effect. The thermal stability analysis showed that the luminescence intensity of BaAl 2 Si 3 O 4 N 4 : Sm 2+ at 150 °C still maintains 62.7 % of that at room temperature , showing excellent thermal stability. All results indicate that BaAl 2 Si 3 O 4 N 4 : Sm 2+ phosphor has important potential applications in the field of plant lighting.
研究领域:
材料科学
·
光电子学
·
农业光学
·
无机化学
·
发光材料
✓ 已验证
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2018
·
IF 2.831
Xiaoping Liang,Ping Hu,Hongyang Zhang,Wen Tan
In this work, hypercrosslinked strong anion-exchange polymer resins (HXLPP-SAX) were synthesized and evaluated as solid-phase extraction (SPE) sorbents for extracting fluoroquinolones (FQs) in milk samples. These particles were prepared using a protocol that was facile and cost-effective by combining hypercrosslinking reactions and quaternisation reactions in one step. After the synthesis, the morphological properties and anion-exchange, adsorption, and selectivity performances of the HXLPP-SAX resins were characterized and evaluated. It was shown that the polymers were monodisperse microspheres, with the mean diameters of 2–4 μm, ion-exchange capacity (IEC) of 0.311 meq/g, and specific surface area more than 1000 m 2 /g. The resins applied as SPE sorbents possessed high selectivity in the extraction of amphoteric compounds (enoxacin and enrofloxacin as the representatives) followed by HPLC-UV analysis, as compared to commercially available strong anion-exchange sorbents (Oasis MAX). The SPE-HPLC-UV method was fully validated and exhibited good linearity (10–2000 ng/g, R 2 ≥ 0.997), low limits of detection (2.8–5.1 ng/g), good recoveries (85.8%–117.9%, RSDs ≤ 7.1%) and precisions (intra-day RSDs ≤ 7.7% and inter-day RSDs ≤ 9.4%). Then the method was performed the selective enrichment of six FQs (enoxacin, norfloxacin, ciprofloxacin, lomefloxacin, enrofloxacin, and sparfloxacin) in milk samples. The present results demonstrated that the proposed resins exhibited a promising potential for the enrichment and determination of FQ residues in milk samples as well as in other samples with complex matrices.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Xiaoxiao Wei,Yuzhi Wang,Jing Chen,Panli Xu,Wei Xu,Rui Ni,Jiaojiao Meng,Yigang Zhou
Novel polymeric deep eutectic solvents (PDES) based on 3-acrylamidopropyl trimethylammonium chloride/D-sorbitol functionalized amino-magnetic (Fe 3 O 4 NH 2 ) metal-organic framework (HKUST-1-MOF) composites (Fe 3 O 4 NH 2 @HKUST-1@PDES) were synthesized and characterized by field emission transmission electron microscope (FE-SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), fourier transform infrared spectrometry (FT-IR), thermal gravimetric analysis (TGA), vibrating sample magnetometer (VSM) and zeta potentials . Then the composites were firstly utilized to selectively separate malachite green (MG) and crystal violet (CV) coupled with magnetic solid-phase extraction (MSPE). A response surface methodology (RSM) based on Latin hypercube sampling (LHS) was selected to analytically optimize the extraction parameters including initial concentration of dyes, extraction time, pH value and extraction temperature. The maximum extraction amount and optimal extraction conditions predicted by the RSM model matched well with the actual experimental results, and the extraction amount was 966.93 mg g −1 for MG and 788.90 mg g −1 for CV,respectively. The results indicated that the model possessed higher calculation accuracy through analyzing fewer sample points, thereby achieving theoretical prediction of extraction amount and conditions and being a prefect supplementary to actual experiments. The electrostatic interaction between the composites and cationic dyes played the main roll in the extraction process. The proposed extraction method exhibited lower limit of detection (98.19 ng mL −1 for MG and 23.97 ng mL −1 for CV) and preeminent precision (RSD ˂ 0.4%). Spiked recoveries of fish samples at three spiking levers ranged from 89.43% to 100.65% for MG and 95.29%–98.03% for CV. All results highlighted the excellent potential of Fe 3 O 4 NH 2 @HKUST-1@PDES-MSPE strategy in selective separation of cationic dyes in complex medium.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 90
·49153-49160
·
IF 3.708
Dan Liu,Nan Song,Ye-Chun Cheng,Dai-Xiong Chen,Qiong Jia,Ying-Wei Yang
Poly(glycidyl methacrylate-co-ethylene dimethacrylate) modified with a new supramolecular macrocycle, carboxylatopillar[5]arene, was successfully prepared inside a capillary. The functionalized polymer monolith material was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and Fourier-transformed infrared spectra. The experimental results showed that this type of polymer possess a good network skeleton structure and excellent extraction properties for the enrichment of parabens by polymer monolith solid-phase microextraction coupled with high performance liquid chromatography. Compared with other pre-treatment methods, the simple operation and inexpensive instrumentation characteristics of the developed polymer monolith SPME method make it more suitable for the extraction of parabens in red wine samples with great potential for further broadening its applications in the enrichment of other real samples.
研究领域:
分析化学
·
环境科学
·
食品安全
·
材料科学
·
色谱学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 9
·711
·
IF 1.81
Liu Dong,Jin Yahong,Xiong Guangting,Lv Yang,Wu Haoyi,Ju Guifang,Chen Li,Hu Zhengfa,Hu Yihua
A series of broadband blue-green phosphors Rb 0.5+ y Na 1.5− y (Li 3 SiO 4 ) 2 : x Eu 2+ (0 ≤ y ≤ 0.4, 0.01 ≤ x ≤ 0.08) were synthesized by the high-temperature solid-state reaction. The powder X-ray diffraction was employed to explore the crystal structural evolution from RbNa 3 (Li 3 SiO 4 ) 4 to RbNa(Li 3 SiO 4 ) 2 with the increasing of Rb + . The spectra show the optimized composition was determined as y = 0.4. The luminescence, lifetime decay curves and thermal steadily spectra of Rb 0.9 Na 1.1 (Li 3 SiO 4 ) 2 : x Eu 2+ phosphors were investigated in detail. The phosphor of Rb 0.9 Na 1.1 (Li 3 SiO 4 ) 2 :Eu 2+ shows suitable visible spectra (450–550 nm, cover the blue and green regions), excellent thermal quenching (104%@150 °C of the initial integrated intensity at room temperature under 396 nm excitation) and broad excitation spectrum (320–450 nm). Finally, a commercial near-UV LED devices (395 nm) were fabricated with the Rb 0.9 Na 1.1 (Li 3 SiO 4 ) 2 :Eu 2+ phosphor as blue-green and commercial red phosphor CaAlSiN 3 :Eu 2+ with a warm color temperature of 3104 K and a color rendering index of 91.8. This result indicated that Rb 0.9 Na 1.1 (Li 3 SiO 4 ) 2 :Eu 2+ may be a promising blue-green phosphor for indoor lighting.
研究领域:
材料科学
·
发光材料
·
固体化学
·
照明技术
·
无机化学
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Songtong Xuan,Yuming Tian,Xiangchen Kong,Jianying Hao,Xiaojun Wang
The tuning of the properties of MgAl 2 O 4 -based materials has aroused great attention in the field of engineering technology. Along these lines, magnesia and alumina were used as raw materials to prepare spinel by the solid-phase sintering method at 1500–1600 °C. Particularly, the impacts of the different MgO/Al 2 O 3 molar ratios on the microstructural densification, sintering process and mechanical property of the fabricated materials were systematically studied. The results showed that the stoichiometric spinel with the highest concentration of ion diffusion possessed the best densification. And the magnesium-rich spinel displayed the better densification following with the formation of solid-solution, while the aluminum-rich spinel exhibited the worst ability in forming the solid-solution. Moreover, the different molar ratios changed the microstructure of the spinel, which induced the optimal sintering temperature of stoichiometric spinel to be at least 50 °C below that of the others. Specifically, in stoichiometric spinel, spinel grains grew up and formed obvious structure, which made the sintering process arrive at the end point and made the performance reach the best. Specifically, the flexural strength was 112.62 MPa and apparent porosity was 0.44%. However, no grown or developed spinel grains were observed for magnesium-rich/aluminum-rich spinels, which delayed the sintering process.
研究领域:
材料科学
·
无机非金属材料
·
陶瓷工艺学
·
固态化学
·
结构陶瓷
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Wenyuan He,Xuejun Zheng,Jinfeng Peng,Qiang Zhang,Dazhao Pei,Xinyang Yan
A facile one-step solid-phase synthesis strategy is developed for synthesizing a binder-free molybdenum disulfide/carbon fibers paper (MoS 2 /CFP) anode. The microstructure, composition, morphology and electrochemical performances were investigated. It is found that the thin MoS 2 layers are well anchored on the interlaced carbon fibers to form MoS 2 /CFP, which has mesoporous structure and large specific surface area of ∼18.8 m 2 g -1 . As a result, the obtained MoS 2 /CFP anode exhibits a reversible capacity of 261 mAh·g −1 with 31.2% loading ratio of MoS 2 . After subtracting the capacity of CFP, the MoS 2 in the composite anode delivers a reversible capacity of 539 mAh·g −1 and shows better cycle stability than commercial MoS 2 after 100 cycles at 100 mA g −1 . The remarkable electrochemical performances could be attributed to the buffer space among carbon fibers for the volume changes of MoS 2 as well as the highly conductive carbon fibers network, suggesting that the MoS 2 /CFP is a promising binder-free anode for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Kaiqiang Wu,Jie Shu,Xiaoting Lin,Lianyi Shao,Peng Li,Miao Shui,Mengmeng Lao,Nengbing Long,Dongjie Wang
A series of Na x Li 4−x Ti 6 O 14 (0 ≤ x ≤ 4) are prepared by solid-state method and their structures, morphologies and electrochemical properties are compared by changing the Na/Li atomic ratio. It can be found that two single-phase samples of Na 2 Li 2 Ti 6 O 14 and Na 4 Ti 6 O 14 and three multi-phase samples of Li 4 Ti 6 O 14 (Li 4 Ti 5 O 12 /TiO 2 ), NaLi 3 Ti 6 O 14 (Na 2 Li 2 Ti 6 O 14 /Li 4 Ti 5 O 12 /TiO 2 ) and Na 3 LiTi 6 O 14 (Na 2 Li 2 Ti 6 O 14 /Na 2 Ti 3 O 7 ) can be formed by using a stoichiometric ratio of starting materials based on the formula of Na x Li 4−x Ti 6 O 14 . Besides, different Na/Li atomic ratios in Na x Li 4−x Ti 6 O 14 also induce the morphology evolution shifting from round-shape to polyhedron-shape, and then to square-shape with the increase of Na content. Electrochemical tests show that Li 4 Ti 6 O 14 delivers the highest charge capacities of 116 mAh g −1 at 100 mA g −1 , 91.5 mAh g −1 at 200 mA g −1 , 77.5 mAh g −1 at 300 mA g −1 and 66.9 mAh g −1 at 400 mA g −1 among five samples. For comparison, Na 4 Ti 6 O 14 only reveals the reversible capacities of 38.6 mAh g −1 at 100 mA g −1 , 30.2 mAh g −1 at 200 mA g −1 , 24.8 mAh g −1 at 300 mA g −1 and 20.9 mAh g −1 at 400 mA g −1 . It suggests that Li 4 Ti 6 O 14 is the most potential lithium storage material among all the Na x Li 4−x Ti 6 O 14 samples.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）