ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Yuan Su,Xuetong Li,Longjiao Zhu,Huashuo Chu,Yangzi Zhang,Jingjing Tian,Shuxia Lyu,Wentao Xu
To develop an on-site, thermostatic and rapid sensor for the detection of Vibrio parahaemolyticus (V. parahaemolyticus) , A single cross-priming fluorescence (SCPF) sensor was designed using a 3D nano-nucleic acid hybrid material that termed mesoporous silica nanoparticle/nucleic acid-doped nanoflower (MSN/NA-doped nanoflower). In addition, a portable polymerase chain reaction (PCR) tube fluorescence reader was built. Further analysis of the MSN/NA-doped nanoflower morphology and the enhancement mechanism indicated that the MSNs aggregated into larger nanoclusters by adsorbing single cross-priming amplification (sCPA) components, forming MSNs/NAs-doped nanoflowers, and increasing the local concentrations to enhance sCPA efficiency. Cyclic amplification relied mainly on the self-folding hairpin-like structure of the amplified product that continuously formed, opened, re-formed, and opened again. The target DNA was detected with a detection limit of 2.4 copies/μL.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Zhongshu Li,Yuli Xue,Xiaoling Tan,Wenqing Li,Shaonan Xu,Ziyan Wang,Jian Wang,Lina Li,Shiding Miao
It is of great importance to separate potassium salts from carbonate-based lakes, especially the low-[K+] but high-[Na+] brine which has been discovered around the world. Here the phase diagram of the quaternary system Na+, K+//Cl–, CO32––H2O was experimentally studied at 298.15 K via the method of isothermal evaporation, and the results corrected the previous diagram reported by Blasdale (J. Am. Chem. Soc.1923, 45, 2935–2946). The type of salts appeared and their solubility during the evaporation, and the density vs composition diagram and the pH values were plotted based on the experimental data. It was found that there were six invariant points, seven univariant curves, and five crystallization fields in the equilibrium phase diagram. To extract single-salt of potassium, certain areas in the Na+, K+//Cl–, CO32––H2O diagram were chosen to be acidified by the compressed CO2, and potassium in the form of KHCO3 was precipitated from the mother solution. The compressed CO2 was able to avoid formation of NaKCO3·6H2O during evaporation of the original system Na+, K+//Cl–, CO32––H2O. Based on experiment data, the region area for potassium salt extraction was determined, and this area was suitable for extracting K+ salts from brines with a [Na+/K+] ratio even lower than 0.44. This strategy opened a new way to recovery of potassium with a maximum yield of 59.88% from the carbonate-chloride-based brine.
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2023
·Vol. 14
·期 44
·12570-12581
·
IF 8.4
Mingli Xu,Fengxue Zhang,Yanhui Zhang,Chen Wu,Xue Zhou,Xinping Ai,Jiangfeng Qian
Exploring a sodium-enriched cathode (i.e. Na4V2(PO4)3, which differs from its traditional stoichiometric counterpart Na3V2(PO4)3 that can provide extra endogenous sodium reserves to mitigate the irreversible capacity loss of the anode material (i.e. hard carbon), is an intriguing presodiation method for the development of high energy sodium-ion batteries. To meet this challenge, herein, we first propose a redox-potential-matched chemical sodiation approach, utilizing phenazine-sodium (PNZ-Na) as the optimal reagent to sodiate the Na3V2(PO4)3 precursor into Na-enriched Na4V2(PO4)3. The spontaneous sodiation reaction enables a fast reduction of one-half V ions from V3+ to V2+, followed by the insertion of one Na+ ion into the NASICON framework, which only takes 90 s to obtain the phase-pure Na4V2(PO4)3 product. When paired with a hard carbon anode, the resulting Na4VP‖HC full cell exhibits a high energy density of 251 W h kg−1, which is 58% higher than that of 159 W h kg−1 for the Na3VP‖HC control cell. Our chemical sodiation methodology provides an innovative approach for designing sodium-rich cathode materials and could serve as an impetus to the development of advanced sodium-ion batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2023
·
IF 10.9
Xianwei Li,Zhenqian Wu,Xudong Ma,Ling Xin,Xiao Yu,Yong Liu
Carbonaceous materials , such as hard carbon and porous carbon , have gained great attentions as the anode materials for Na-ion batteries (NIBs). However, their defects and disordered structure cause the low initial coulombic efficiency (ICE), high-potential slope region and small charge capacity below 0.5 V. Herein, a structurally stable MOF contained 1,3,5-triazine-2,4,6-triamine moieties, belonging to the tetragonal space group I 4/m, is synthesized. On this basis, MOF-derived crystalline carbon with graphite-like crystal, instead of amorphous porous carbon, can be obtained due to slow pyrolysis of MOF framework along with timely and sufficient reassembly of the pyrolyzed carbon atoms into graphite-like crystal under graphite-induced condition. The graphite-like crystal has a geometrically similar unit cell to graphite crystal but with a magnification ratio of 1.25, yielding proportionally expanded d-spacing of (002) plane (4.2 Å), which enables the reversible Na + intercalation/de-intercalation. When applied in NIBs, it exhibits a very high ICE of 96.0% and reversible charge capacity of 356.2 mAh g −1 , reaching the advanced level of graphite applied in LIBs . More importantly, its charge capacity below 0.5 V can account for 90% of the total charge capacity, which is also the key parameter to effectively increase the energy density of full batteries.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 10
·7030-7036
·
IF 3.9
Xiunan Yao,Ninglian Wang,Xingwang Zheng,Quanlian Li,Ewerton Santos,Linda Maharjan,Junjie Wang,Zhihui Guo,Jiahua Guo,Huan Zhang,Kui Zheng,Jingquan Wu,Yao Li
The sensitive determination of levoglucosan in aqueous samples has great significance for the study of biomass burning. Although some sensitive high-performance liquid chromatography/mass spectrometry (HPLC/MS) detection methods have been developed for levoglucosan, there are still plenty of shortcomings, such as complicated sample pre-treatment procedures, large-amount sample requirements, and poor reproducibility. Herein, a new method for the determination of levoglucosan in the aqueous sample was developed using ultra-performance liquid chromatography with triple quadrupole mass spectrometry (UPLC-MS/MS). In this method, we firstly found that compared with H+, Na+ could effectively enhance the ionization efficiency of levoglucosan, even though the content of H+ is higher in the environment. Moreover, the precursor ion m/z 185.1 [M + Na]+ could be used as a quantitative ion to sensitively detect levoglucosan in aqueous samples. Only 2 μL of un-pretreated sample is required for one injection in this method, and great linearity was obtained (R2 = 0.9992) using the external standard method when the concentration of levoglucosan was 0.5–50 ng mL−1. The limit of detection (LOD) and quantification (LOQ) were 0.1 ng mL−1 (0.2 pg absolute mass injected) and 0.3 ng mL−1, respectively. Acceptable repeatability, reproducibility, and recovery were achieved. This method has the advantages of high sensitivity, good stability, good reproducibility, and simple operation, which could be widely used for the detection of different concentrations of levoglucosan in various water samples, especially for the detection of samples with low content such as ice core or snow samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Chunqing Cai,Fan Yang,Zhigang Zhao,Qiuxia Liao,Ruixi Bai,Wanghuan Guo,Peng Chen,Yang Zhang,Hao Zhang
This paper first reports on the high-selective separation and recovery of Li(I) from Na(I) and K(I) using the polymer inclusion membrane (PIM) system containing both thenoyltrifluoroacetone (TTA) and trioctylphosphine oxide (TOPO) as the carrier molecules, and cellulose triacetate (CTA) as the base polymer. To characterize the PIM, we used Fourier Transform infrared (FT-IR) spectroscopy, scanning election microscopy (SEM) and thermogravimetric analysis (TGA). The optimized results of this work showed that initial flux ( J 0 ) of Li(I) that was as high as 1.04 × 10 −2 mol m −2 h −1 , corresponding to permeability ( P ) of 3.62 × 10 −3 m h −1 , were recorded using the PIM composed of 50 wt% CTA and 26.74 wt% TTA + 23.26 wt% TOPO from a feed phase containing Li(I), Na(I) and K(I) in an alkaline chloride solution into an acceptor phase containing 0.1 M HCl. Li(I) was transported successfully to the acceptor phase but Na(I) and K(I) barely passed in the first 20 h. The separation factor ( S F ) of Li(I) over the Na(I) and K(I) respectively ( S F L i ( I ) / N a ( I ) ≒ 54.25, S F L i ( I ) / k ( I ) ≒ 50.60) demonstrated that Li(I) can be high-selectively separated. It is expected that this membrane can be applied for selective recovery of Li(I) from salt lakes or sea water that contains significant concentrations of Na(I) and K(I).
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Mingxia Lu,Lixia Yang,Ziyi Wu,Qi Wang,Menglei Wang,Jiajian Xu,Shuqu Zhang,Renjie Song,Weili Dai,Jianping Zou,Shenglian Luo
An air purifier that provides clean air will be popular if it is portable and capable of removing volatile organic chemicals and reducing exposure to bacteria. Herein, ultra-thin and dense Bi 2 WO 6 nanoflakes grown on W meshes specialize in offering abundant oxygen vacancies due to Na + driving laminar splitting. Under visible lights , the photogenerated carriers streaming along the ultrathin Bi 2 WO 6 surface produce bountiful reactive oxygen species for mineralizing VOCs and sweeping bacteria. Enriched with •O 2 - and •OH, a 15 cm*5 cm Na-Bi 2 WO 6 mesh can completely degrade 30 ppm toluene in 0.45 dm 3 reactor in 1 hour without producing any toxic intermediates like benzene, and its efficacy only decayed by 4% after a continuous 14-hour run. A cup-shaped air purifier was assembled with the Na-Bi 2 WO 6 mesh, enabling the rapid elimination of 1 ppm toluene, 2 ppm formaldehyde, and bacteria within a 120 dm 3 test space.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2016
·
IF 1.835
Dawei Li,Guangqian Li,Pingfeng Bian,Zhe Shen,Mengfan Fu,Wenjun Fang,Weidong Yan
Epigallocatechin gallate (EGCG) is the most abundant and active components in tea. In this text, the density and viscosity of ternary aqueous solution of EGCG containing LiCl/NaCl/KCl were determined at temperatures ranging from 288.15 to 308.15 K at atmospheric pressure. The density data was used to compute the apparent molar volumes (Vφ), limiting partial molar volumes (Vφ0), and transfer partial molar volumes (ΔtrsVφ0). The viscosity B-Coefficients were calculated from the measured viscosity data using the extended Jones–Dole equation. The values of density and viscosity increased continuously with the increasing of molality of EGCG and decreased with the temperature increasing. The positive values including (Vφ, Vφ0, ΔtrsVφ0, viscosity B-Coefficients, the free energies of activation for solvent Δμ10≠, and for solute Δμ20≠) and Helper’s constant (∂2Vφ0/∂T2)p close to zero indicated the presence of strong solute–solvent interactions and the structure–making effect of EGCG in the investigated solutions. The apparent molar isobaric expansions (Eφ0) decreasing with temperature suggested that the solute–solvent interactions became weaker as temperature increased. These significant parameters could provide necessary data about molecular interactions occurring in simulated body fluids.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuanqiong Mu,Junkai Chong,Xuehua Shen,Mei Zhang,Zuotai Zhang,Min Guo
Lithium silicate (Li 4 SiO 4 ) adsorbents garnered considerable interest for CO 2 capture due to their high adsorption capacity and stable cycling performance. While Na 2 CO 3 doping has been shown to enhance its the adsorption capacity at low CO 2 concentrations, the resulting samples exhibited poor cycling stability. Previous research has predominantly focused on the adsorption process, often overlooking the desorption kinetics. This study addressed this gap by investigating the desorption kinetics and decay mechanisms of Na-doped Li 4 SiO 4 to develop a version with long-term cycling stability from fly ash. The Na/Si ratio and desorption conditions were optimized. Optimal cycling stability was achieved at R Na/Si = 0.25 and a desorption temperature of 700 °C, yielding an initial adsorption capacity of 29.45 wt% and retaining 83 % of this capacity after 56 cycles. Phase analysis, desorption kinetics modeling, and examination of kinetic parameter evolution over multiple cycles uncovered the decay mechanisms in Na-doped Li 4 SiO 4 . Active phase Li 3 NaSiO 4 ′s poor reversibility contributed to performance degradation. Furthermore, molten LiNaCO 3 played a dual role during desorption: it accelerated the diffusion of Li + /Na + /CO 3 2– but hindered CO 2 diffusion. When the LiNaCO 3 content was low, the diffusion of Li + /Na + /CO 3 2– became the rate-limiting step; conversely, when the content was high, its reaction with CO 2 to form C 2 O 5 2- impeded diffusion, thus becoming the new rate-limiting step.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Chenxiao Chu,Jing Yang,Qianqian Zhang,Nana Wang,Feier Niu,Xuena Xu,Jian Yang,Weiliu Fan,Yitai Qian
Flower-like assembly of ultrathin nanosheets composed of anatase and bronze TiO2 embedded in carbon is successfully synthesized by a simple solvothermal reaction, followed with a high-temperature annealing. As an anode material in sodium-ion batteries, this composite exhibits outstanding electrochemical performances. It delivers a reversible capacity of 120 mA h g–1 over 6000 cycles at 10 C. Even at 100 C, there is still a capacity of 104 mA h g–1. Besides carbon matrix and hierarchical structure, abundant interfaces between anatase and bronze greatly enhance the performance by offering additional sites for reversible Na+ storage and improving the charge-transfer kinetics. The interface enhancements are confirmed by discharge/charge profiles, rate performances, electrochemical impedance spectra, and first-principle calculations. These results offer a new pathway to upgrade the performances of anode materials in sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Ke Wang,Ying Huang,Xiulan Qin,Mingyue Wang,Xu Sun,Meng Yu
A novel graphene/carbon nanotube (GN-CNT) hybrid was synthesized by thermal pyrolysis of urea on the surface of graphene at 800, 900 and 1000 °C. The effects of pyrolysis temperature on yield of carbon nanotubes and electrochemical properties of the GN-CNT hybrid were investigated carefully. The production rate of pyrolysis gas was increased as temperature rising. The GN-CNT hybrid reached the largest surface area and the generation of a mass of pores at the pyrolysis temperature of 900 °C due to the carbon nanotubes cracking during pyrolysis at 1000 °C. The properties of favorable 3D architecture, the generation of a mass of pores during the release of carbon nitride gases and outstanding mechanical flexibility, showed pronounced effects on the fast and steady transfer of electrons and sodium-ion. Consequently, the GN-CNT hybrid pyrolysized at 900 °C exhibit a very high reversible capacity of up to 269.14 mAh g −1 after 100 cycles at a current density of 300 mA g −1 . Even up to 5 A g −1 , a rate capacity of 195.37 mA h g −1 can be obtained after 700 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 9
·1655-1664
·
IF 3.849
Dong Yan,Chun-Li Hu,Jiang-Gao Mao
Four new alkali metal boroantimonates, namely, A2SbB3O8 (A = Na, K, Rb) and β-RbSbB2O6, have been synthesized by high-temperature solid-state reactions. Isostructural A2SbB3O8 (A = Na, K, Rb) crystallizes in the monoclinic space group P21/c, with structures featuring a novel 3D anionic framework composed of SbO6 octahedra and linear B3O8 groups with 1D tunnels of Sb4B4 8-membered-rings (MRs) along the a-axis, which are filled by alkali metal ions. β-RbSbB2O6 crystallizes in the polar space group Cc, revealing novel 3D anionic networks composed of SbO6 octahedra chains and B2O5 groups with 1D tunnels of Sb4B2 6-MRs along the b-axis and 1D tunnels of Sb3B4 7-MRs along the c-axis. Studies on their optical properties and thermal stability, band structure calculations based on DFT methods and linear optical calculations have also been performed.
研究领域:
材料科学
·
晶体学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）