JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhiping Zhang,Xinmiao Xi,Yongjie Wang,Hongfei Liu
At room temperature , monoclinic In 2 W 3 O 12 ceramics exhibits positive thermal expansion. However, it transforms into an orthorhombic phase above 253 ℃, and then stably exhibits negative thermal expansion (NTE). In this work, to improve the NTE performance and extend the NTE temperature range of In 2 W 3 O 12 , the K x Mn x In 2-x W 3 O 12 (0≤x≤0.5) ceramics were synthesized via the solid-state reaction method. The effects of (KMn) 3+ double cation co-doping on the composition , microstructure, and thermal expansion behaviors of In 2 W 3 O 12 ceramics were studied using XRD , Raman, XPS, SEM, and TMA. The results show that (KMn) 3+ cations can replace In 3+ in In 2 W 3 O 12 ceramics. As the (KMn) 3+ doping amount increases, monoclinic In 2 W 3 O 12 gradually changed into monoclinic K x Mn x In 2-x W 3 O 12 . Meanwhile, the grains grow up and the density of K x Mn x In 2-x W 3 O 12 ceramics was increased. Pure monoclinic K x Mn x In 2-x W 3 O 12 ceramics were prepared when x rises to 0.25 and 0.4. Among them, the thermal expansion coefficient of K 0.4 Mn 0.4 In 1.6 W 3 O 12 ceramics in 100–700 ℃ is as high as -17.83×10 -6 ℃ -1 , which was significantly improved compared to In 2 W 3 O 12 ceramics. In addition, the structural phase transition of In 2 W 3 O 12 ceramics around 253 ℃ was gradually eliminated and the NTE temperature range was widened. Double cation (KMn) 3+ co-doping effectively improves the NTE performance of In 2 W 3 O 12 .
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高影响因子
DALTON TRANSACTIONS
·
2013
·Vol. 42
·期 19
·7051-7058
·
IF 3.806
Chao Huang,Chun-Li Hu,Xiang Xu,Bing-Ping Yang,Jiang-Gao Mao
The synthesis, crystal and band structures and optical characterizations of a new polar thallium(I) vanadyl iodate, namely Tl(VO)2O2(IO3)3, are reported. Tl(VO)2O2(IO3)3 crystallizes in the orthorhombic polar space group Ima2 (No. 46) with a = 14.1143(17), b = 10.2116(12), c = 8.0319(9) Å, V = 1157.6(2) Å3 and Z = 4. The structure of Tl(VO)2O2(IO3)3 exhibits a 1D [(VO)2O2(IO3)3]− chain in which neighboring distorted VO6 octahedra are interconnected by both bridging oxo and iodate anions. The SHG measurements on Tl(VO)2O2(IO3)3, using a 2050 nm laser radiation, showed a moderate strong SHG response of 1.2 × KTP(KTiOPO4). Furthermore, the material is phase-matchable. Theoretical calculations based on DFT methods were performed by using the total-energy code CASTEP.
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2013
·Vol. 66
·期 1
·133-138
·
IF 1.66
Peng Shusen,Zhao Wenjie,Zeng Zhixiang,Li He,Xue Qunji,Wu Xuedong
In this report, hybrid silica sol–gel coating was prepared using Ce(NO 3 ) 3 (Sol-Ce) as catalyst. Structure, surface morphology and anticorrosion ability of Sol-Ce solution/coating were studied by infrared spectroscopy (IR), scanning electron microscopy, energy dispersive spectrometer (EDS), potentiodynamic scan (PDS) and electrochemical impedance spectroscopy (EIS). IR results showed that Ce(NO 3 ) 3 had a stronger influence on reactivity of alkoxysilane. EDS results revealed that the fraction of Fe in Sol-Ce coating was significantly lower than regular acid-catalyzed hybrid silica sol–gel coating (Sol-Ac) and Sol-Ac with Ce(NO 3 ) 3 -doped coating (Sol-Ac/Ce). The results of PDS and EIS demonstrated that Sol-Ce coating had better anticorrosion ability than Sol-Ac and Sol-Ac/Ce on carbon steel. The enhanced anticorrosion performance of the Sol-Ce coating might result from the following two reasons: (a) Ce(NO 3 ) 3 as a catalyst could alleviate the negative effects of low pH with using acid catalyst (dissolution of carbon steel) and (b) Ce(NO 3 ) 3 could impede corrosion of carbon steel as corrosion inhibitor.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
无机化学
·
电化学
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Liqiao Zhong,Yong Lu,Haixia Li,Zhanliang Tao,Jun Chen
Aqueous rechargeable sodium-ion batteries (ARSIBs) are promising candidates for large-scale energy storage applications due to their high safety, low cost, and environmental friendliness. However, appropriate anode materials with high capacity for ARSIBs are limited, and their cycling stability is generally unsatisfactory. Here we report high-performance ARSIBs with polyacrylamide hydrogel as electrolyte and alloxazine (ALO) encapsulated in CMK-3 as anode. The hydrogel with solid content of 60% could effectively mitigate the dissolution issue of sodiated ALO because its cross-linked structure is helpful to reserve H2O. The ALO/CMK-3 anode based on a two-electron transfer reaction could deliver a high capacity of 160 mA h g–1. The introduction of CMK-3 could improve the electrical conductivity of ALO and further reduce the dissolution of sodiated ALO because of its high conductivity and nanochannel structure. The full ARSIBs exhibit an energy density of 50 W h kg–1 (based on the total mass of active electrode materials) with good capacity retention of 90% after 100 cycles at 2 C and high rate capability of 146 mA h g–1 at 10 C (1 C = 250 mA g–1). This work paves the way to construct high-performance ARSIBs with high-capacity organic anode and hydrogel electrolyte.
研究领域:
能源材料
·
电化学
·
电池技术
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高影响因子
Data in Brief
·
2015
·
IF 0
Xinghao Lin,Yanming Zhao,Youzhong Dong,Quan Kuang
This data article contains the synthesis and structure information of a new Fe-base sodium metaphosphate compound, which is related to the research article entitled ‘Synthesis, structural, magnetic and sodium deinsertion/insertion properties of a sodium ferrous metaphosphate, NaFe(PO 3 ) 3 ’ by Lin et al. [1] . The research article has reported a new Fe-base metaphosphate compound NaFe(PO 3 ) 3 , which is discovered during the exploration of the new potential electrode materials for sodium-ion batteries. In this data article, the synthesized process of this metaphosphate compound and the morphology of the obtained sample will be provided. The high-power XRD Rietveld refinement is applied to determine the crystal structure of this metaphosphate compound and the refinement result including the main refinement parameters, atomic coordinate and some important lattace parameters are stored in the cif file. Also, the refined structure has be evaluated by checkcif report and the result is also provided as the supplementary materials.
研究领域:
材料科学
·
无机化学
·
储能
·
晶体学
·
电化学
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DOI
PHYSICAL REVIEW B
·
2024
·Vol. 109
·期 21
·214430
·
IF 3.2
Lei Yue,Ziyou Lu,Kun Yan,Le Wang,Shu Guo,Ruixin Guo,Peng Chen,Xiaobin Chen,Jia-Wei Mei
In our study, we conduct magnetization and heat capacity measurements to investigate field-induced magnetic phase transitions within the newly synthesized compound ${\mathrm{K}}_{2}{\mathrm{Ni}}_{2}{({\mathrm{SeO}}_{3})}_{3}$, a spin-1 dimer system arranged on a triangular lattice. From our first-principles simulations, we determine that the spin system in ${\mathrm{K}}_{2}{\mathrm{Ni}}_{2}{({\mathrm{SeO}}_{3})}_{3}$ can be represented as a two-dimensional triangular-lattice spin-1 dimer model, including an intra-dimer exchange of ${J}_{1}=0.32\phantom{\rule{0.16em}{0ex}}\mathrm{meV}$, an inter-dimer exchange of ${J}_{2}=0.79\phantom{\rule{0.16em}{0ex}}\mathrm{meV}$, and an easy-axis anisotropy of $D=0.14\phantom{\rule{0.16em}{0ex}}\mathrm{meV}$. The presence of easy-axis magnetic anisotropy explains the distinct magnetic phase diagrams observed under $c$-axis directional and in-plane magnetic fields. Notably, our investigation unveils a two-step phase transition with the magnetic field aligned with the $c$ direction. Our findings yield valuable insights into the magnetic phase transitions inherent to geometrically frustrated magnetic systems featuring dimer structures.
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Peizhu Zheng,Dongxing Cai,Jihua Zhao,Weiguo Shen
The mixed surfactants of dodecyltrimethylammonium bromide (DTAB) and 1-dodecyl-3-methylimidazolium bromide (C 12 mimBr) in aqueous solutions were studied by measurement of electrical conductivity and isothermal titration microcalorimetry (ITC). The critical micelle concentrations (cmc) and the degree of dissociations of counter ions were determined for this system at various surfactant compositions, and the thermodynamic properties of micellization were evaluated. A one-parameter Margules equation was used to fit the cmc values to calculate the mole fraction, the activity coefficients of two surfactant components and the excess properties in mixed micelles.
研究领域:
胶体化学
·
物理化学
·
表面化学
·
热力学
·
溶液化学
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DOI
高影响因子
JOURNAL OF CHEMICAL SCIENCES
·
2024
·Vol. 136
·期 4
·82
·
IF 1.7
Qin Xiao-Li,Ding Xue-Qing,Li Yu-Qin,Yu Yi-Hao,Xu Fan,Rong Zhou
A method for synthesizing 3-substituted isocoumarins under copper catalysis involves the cyclization reaction of o -bromobenzoic acid and alkynes in DMSO, with the assistance of K 2 CO 3 at 100 °C. It exhibits a wide range of substrate compatibility and excellent tolerance towards diverse functional groups. Graphical abstract A method for synthesizing 3-substituted isocoumarins under copper catalysis involves the cyclization reaction of o-bromobenzoic acid and alkynes in DMSO, with the assistance of K 2 CO 3 at 100 °C. This reaction demonstrates a synthesis yield of 8–81% for 3-substituted isocoumarins.
研究领域:
有机化学
·
有机合成化学
·
催化化学
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Jie Zhuang,Mingzhu Pan,Yuhui Zhang,Fei Liu,Zhaoyang Xu
Currently, cellulose-based aerogel materials are a hot topic owing to their high specific surface area and high porosity, as well as the green, degradable and biocompatible characteristics of cellulosic materials . Modification of cellulose to enhance the adsorption properties of cellulose-based aerogels has important research significance in solving the problem of water body pollution. In this paper, cellulose nanofibers (CNFs) were modified with polyethyleneimine (PEI), and modified aerogels with directional structures were prepared by a simple reaction and freeze-drying method. The adsorption behavior of the aerogel followed the adsorption kinetic models and isotherm models. More significantly, the aerogel could rapidly adsorb microplastics, reaching equilibrium within 20 min. Furthermore, the fluorescence displayed directly expresses the occurrence of the adsorption behavior of the aerogels. Therefore, the modified cellulose nanofiber aerogels were of reference significance for microplastic removal from water bodies.
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PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Renping Cao,Jingyi Lin,Bang Lan,Fangrui Cheng,Ting Chen,Lan Li,Ru Liu,Jing Wang
Na 3 Sc 2 (PO 4 ) 3 :R (R = Bi 3+ , Sm 3+ , and Sm 3+ /Bi 3+ ) are successfully synthesized in air atmosphere. The high-temperature solid-state reaction method is used in this work. The X-ray diffractometer patterns confirm that all samples have the single pure phase Na 3 Sc 2 (PO 4 ) 3 . Na 3 Sc 2 (PO 4 ) 3 :Bi 3+ displays blue emission because of the Bi 3+ - Sc 3+ metal-to-metal charge-transfer and the 3 P 1 → 1 S 0 transition of Bi 3+ . Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ shows red-orange emission with four emission bands derived from the 4 G 5/2 → 6 H 5/2 (550 - 582 nm), 6 H 7/2 (582–625 nm), 6 H 9/2 (625–675 nm), and 6 H 11/2 (675–750 nm) transitions of Sm 3+ . The optimal Sm 3+ concentration in Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ is ∼8mol%. An adjustable color emission from blue to red-orange of Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ with excitation at 345 nm can be observed when the ratio between Sm 3+ and Bi 3+ ions is changed. Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ emits red–orange light under excitation 406 nm. The optimal Bi 3+ concentration in Na 3 Sc 2 (PO 4 ) 3 :8mol%Sm 3+ , Bi 3+ is ∼ 6mol%. The energy transfer from Bi 3+ to Sm 3+ in Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ is verified by the spectral properties of samples. We discuss the influences of Bi 3+ or Sm 3+ concentration on luminescence properties of samples and analyze their luminous mechanism by energy level diagram. The experimental results of paper are useful for the research of new Bi 3+ and Sm 3+ doped phosphors.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hanwen Zhang,Liuxue Shen,Xiaodong Geng,Jianxin Zhang,Yue Jiang,Hongting Ma,Quanli Liu,Kai Yang,Junlin Ma,Nan Zhu
Sodium superionic conductor (NASICON) structured polyanionic materials have recently attracted great attention for robust crystal structures. However, inherent properties of NASICON presents poor electrical conductivity and low energy density. Herein, non-stoichiometric synthesized strategy is used for acquiring N 3.5 MTP, effectively suppressing voltage hysteresis. Besides, as-fabricated N 3.5 MTP grains in-situ grow on MXene-rGO aerogels by sol–gel synthesis approach obtaining N 3.5 MTP@MXene-rGO. MXene-rGO aerogel as an excellent conductive matrix can effectively avoid agglomeration of Na 3.5 MnTi(PO 4 ) 3 particles and alleviate volume change of the lattice during sodium ion intercalation/deintercalation. Moreover, cross-linked network of N 3.5 MTP@MXene-rGO provides fast electron transfer and ion transport rates. The above synergistic effect and contribution of pseudocapacitance make it an excellent discharge capacity of 189 mA h g −1 at 50 mA g −1 for N 3.5 MTP@MXene-rGO, long cycles of 5000 cycles, as well as 98 mA g −1 at −30 °C (50 mA g −1 ). Prospectively, this study provides an effective strategy for improving electrochemical performance of NASICON-type cathode for sodium batteries.
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高影响因子
Toxics
·
2023
·Vol. 11
·期 6
·479
·
IF 4.6
Tao Wei,Na Cao,Tiantian Han,Yi Chen,Xingtao Zhou,Liyang Niu,Wenting Liu,Chang Li
3-monochloropropane-1,2-diol (3-MCPD) is a food-process toxic substance, and its main target organ is the kidney. The present study examined and characterized the nephrotoxicity and the lipidomic mechanisms in a model of kidney injury in Sprague Dawley (SD) rats treated with high (45 mg/kg) and low (30 mg/kg) doses of 3-MCPD. The results showed that the ingestion of 3-MCPD led to a dose-dependent increase in serum creatinine and urea nitrogen levels and histological renal impairment. The oxidative stress indicators (MDA, GSH, T-AOC) in the rat kidney altered in a dose-dependent manner in 3-MCPD groups. The lipidomics analysis revealed that 3-MCPD caused kidney injury by interfering with glycerophospholipid metabolism and sphingolipid metabolism. In addition, 38 lipids were screened as potential biomarkers. This study not only revealed the mechanism of 3-MCPD renal toxicity from the perspective of lipidomics but also provided a new approach to the study of 3-MCPD nephrotoxicity.Keywords:3-MCPD;nephrotoxicity;lipidomics;biomarkers;pathway
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PubMed
高影响因子
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