IONICS
·
2024
·Vol. 30
·期 7
·3819-3829
·
IF 2.4
Zhang Caihong,Zhong Yan,Tu Hong,Yang Zhihao,Chen Guangping,Zhu Xinghua
Iron phosphate (FePO 4 ·2H 2 O) has emerged as the mainstream process for the synthesis of lithium iron phosphate (LiFePO 4 ), whereas FePO 4 ·2H 2 O produced by different processes also has a great influence on the performance of LiFePO 4 . In this paper, FePO 4 ·2H 2 O was produced by two different processes, in which FeSO 4 ferrous and Fe(NO 3 ) 3 ·9H 2 O ferric were used, respectively. After dehydration under the same conditions, a carbon-coated lithium iron phosphate (LiFePO 4 /C) cathode material was synthesized by a high-temperature solid phase method. The results demonstrated that FePO 4 ·2H 2 O contained different impurities due to different raw materials, which led to different particle sizes, specific surface areas, microscopic morphology, and crystal structures. The difference of FePO 4 ·2H 2 O eventually resulted in the difference of LiFePO 4 /C cathode materials in micro-morphology and crystal structure, which affected the electrochemical performance. Under the premise of comprehensively considering the cost and quality of FePO 4 ·2H 2 O, improving the purity of FePO 4 ·2H 2 O is an important method to improve the electrochemical performance of LiFePO 4 /C cathode materials. Simultaneously, it is also expected to provide theoretical guidance for the preparation of lower-cost and better-quality LiFePO 4 /C cathode materials.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHROMATOGRAPHIA
·
2022
·Vol. 86
·期 1
·97-105
·
IF 2.213
Wang Baichun,Du Jianglong,Liu Bin,Xu Qian,Huang Jingli,Liu Chunbo,Yan Yinghua,Ding Chuan-Fan
Nasopharyngeal carcinoma (NPC), as a malignant tumor, has increasingly affected the health and survival of human, and certain changes in the phosphorylation level of protein have been found in the serum of NPC patients. Thus, the investigation of phosphoproteins/phosphopeptides in human serum of NPC patient will conduce the understanding of the related pathogenesis and pathological processes. However, there are certain limitations in the direct detection of phosphoprotein/phosphopeptide in patient serum by mass spectrometry. Here, we designed a simple and green synthetic route to prepare hollow TiO 2 spheres for phosphopeptide pre-treatment using the hard template method with carbonaceous spheres as the template, providing a novel path for the exploration of hollow spheres and even functionalized probes. The TiO 2 spheres with unique hollow structure exhibit a low detection limit (0.2 fmol), high loading capacity (250 mg/g), stable reusability (ten cycles), high selectivity (1:1500), and relatively good recovery rate (80.3%). Besides, hollow TiO 2 spheres identify 25 phosphopeptides with 19 phosphorylation sites corresponding to 18 phosphoproteins and 15 phosphopeptides with 14 phosphorylation sites corresponding to 10 phosphoproteins from the serum of the healthy person and NPC patient, respectively. Among them, four phosphopeptides with five phosphorylation sites are only detected in NPC samples. After gene ontology analysis of cell components and molecular functions, it is discovered that the identified phosphoproteins are inseparable from NPC related events, including heparin binding, lipid binding, endoplasmic reticulum cavity, and early endosomes, signaling that related functional pathways may be involved in the pathological process of NPC in some way.
研究领域:
生物化学
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肿瘤学
·
医学诊断
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·
IF 1.289
Di Zhao,JianFeng Xu,Lu Wang,JianJia Du,KeDong Dong,CaiFei Wang,XiangDong Liu
Two phosphorylated chitosan derivatives with a similar degree of substitution of about 0.5 were synthesized via either the esterification of chitosan's hydroxyl groups by P 2 O 5 in methanesulfonic acid or the selective incorporation of methylene phosphonic groups on chitosan's amino groups by formaldehyde/H 3 PO 3 in water. The performances of the resulting O -phosphorylated chitosan (OPC) and N -methylene phosphonic chitosan (NMPC) as amphoteric flocculants were assessed in comparison with that of unmodified chitosan. In turbidity removal experiments using kaolin suspensions in water, OPC removed about 90% turbidity, but NMPC only removed 60%. The lower flocculation efficiency of NMPC was attributed to the decreased acid strength of the N -methylene phosphate groups in NMPC. These results revealed that the acidity of the phosphate groups introduced in the modified chitosans is an important factor with regard to the flocculation efficiency, and consequently that O-phosphorylation is more suitable than N-phosphorylation for preparing chitosan-based amphoteric flocculants. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Yulin Zhang,Xiteng Li,Dongjie Yang,Hu Cai,Ziqi Ma,Yu Zhang,Suihan Cui,Zhongzhen Wu
Herein, the three-dimensional (3D) flower-like pigments of micro-nano scaled zinc phosphate (FZP) and ammonium zinc phosphate (FNZP) were successfully synthesized by hydrothermal synthesis method for improving the corrosion resistance of waterborne epoxy (WEP) coating. The micro-structures, chemical compositions and corrosion resistance of the as-obtained specimens were characterized by SEM, XRD, FT-IR, XPS and EIS, respectively. The results indicated that the 3D flower-like FZP and FNZP pigments were comprised of self-assembled nano-micro sheets with an average thickness of 20 nm ∼ 100 nm. Moreover, the remarkable enhancements of compactness and anticorrosion performance, especially for the FNZP-incorporated coating, were principally contributed to the well dispersibility and favourable solubility, which lengthened the permeation pathway and promoted the formation of passivation film.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Juan Wang,Xiaodong Du,Zuifei Wang,Peiwen Wu,Jiangmin Zhou,Xueqin Tao,Zhi Dang,Guining Lu
Tributyl phosphate (TNBP), a new type of flame retardant , is an emerging pollutant and has been frequently detected in various matrices such as wastewater. Efficient removal of TNBP is critical for wastewater treatment . In this study, molecularly imprinted polymer (MIP) was prepared using precipitation polymerization for selective adsorption of TNBP. The results showed that MIP had a porous structure and formed effective imprinting cavities, which was primarily responsible for its superior adsorption ability. The adsorption of TNBP by MIP was carried out following both the pseudo-secondary kinetic model and the Langmuir isothermal adsorption model. MIP adsorbed TNBP rapidly and reached adsorption equilibrium within 30 min with 923 μmol g −1 at 298 K. The adsorption capacity and adsorption rate of MIP were respectively 2 and 5.49 times those of non-molecularly imprinted polymers. In addition, MIP could effectively counter disturbances from external parameters like temperature and pH, exhibiting strong environmental flexibility. MIP can specifically adsorb organophosphate esters, and can selectively adsorb TNBP under the interference of coexisting contaminants such as1,3-diphenylguanidine and isazofos. In actual bodies of water, MIP's highly selective adsorption of TNBP retains its advantage. The selective adsorption of MIP was mainly due to the common phosphate skeleton, and the specific substituent of organophosphate esters played an important role in the imprinting process. Hydrogen bonding might be involved in the polymerization process of TNBP with acrylamide and the adsorption process of TNBP by MIP.MIP exhibited good reuse efficiency, the total adsorption capacity decreased by no more than 25% after 7 reuse cycles. This study provides a simple and efficient method for selective removal of organophosphate from wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xingyang Zhang,Jiahang Liu,Hao Zhang,Pan Wu,Changjun Liu,Jian He,Wei Jiang
Inefficient, slow separation resulting from the high viscosity of phosphoric acid (PA) is a crucial problem that limits the process economy of industrial PA extraction. In this work, a super-PA-phobic stainless-steel mesh (SPPSSM) with excellent anticorrosion properties and stability is prepared and used for rapid separation in various PA/tributyl phosphate (TBP) extraction systems. The separation efficiency in batch operation of a PA-enriched raffinate (PER) and TBP-enriched phase (TEP) mixture formed from pure PA and TBP exceeds 97.59%, and the maximum TEP flux is 19.2593 L·m −2 ·h −1 at 60 °C. The maximum TEP flux of 886.1571 L·m −2 ·h −1 is obtained for a 20 wt% TBP kerosene solution and 20 wt% PA aqueous solution. A continuous separation device using the SPPSSM as the core component maintains a recovery rate of more than 95.57% in long-term operation, confirming its performance stability and robustness. The stable selective penetration of the SPPSSM originates from its super-PA-phobicity, which results from its rough surface with low surface energy; the SPPSSM repels PA but allows TBP to pass through. The separation ability of the SPPSSM is determined by the viscosity, density, and surface tension of the two liquid phases after extraction. It can be predicted using an equation based on the filtration mode after correction by a coefficient representing the Reynolds and Weber numbers. This work proposes a material for the rapid separation of PA/TBP in extraction systems and broadens the application field of superwetted materials under harsh conditions.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2016
·Vol. 41
·期 3
·e12915
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IF 0.894
Meng Xu,Wei Liu,Yawei Zhang,Zengqi Peng,Xiuyun Guo,Fulong Wang
Orthophosphate (Pi), tetrasodium pyrophosphate (PP) and sodium tripolyphosphate (TPP) in the polyphosphatases and longissimus thoracis from beef were detected by ion chromatography. Under pure solution models, tripolyphosphatase (TPPase) interacted with pyrophosphatase (PPase). Single TPP hydrolysis was slower than the polyphosphate blend (the ratio of PP, TPP and sodium hexametaphosphate was 3:4:3). Within 4 h, 0.0896 g/L of TPP remained in the TPP + PPase + TPPase system, while it was hydrolyzed completely in the polyphosphate blend + PPase + TPPase system, which was different under minced meat models. The PP, TPP and polyphosphate blend were hydrolyzed slowly under minced meat models. The acceleration or deceleration of the entire polyphosphates hydrolysis process could be due to the ratio of PPase to TPPase and their activities. These results could be useful in the development of an optimal ratio of polyphosphate mixture for the meat and meat products in food industry. Practical Applications Polyphosphates play an important role in meat processing. They can increase the water holding capacity of muscle proteins, reduce cooking loss, improve meat tenderness and gel properties, and affect the ability to emulsify. It is commonly used commercially as a blend of various polyphosphates (including tetrasodium pyrophosphate, sodium tripolyphosphate and sodium hexametaphosphate) in meat processing. There have been few reports on the mechanism through which polyphosphate blend improve the functionalities of muscle proteins. In this work, the dynamic changes in the hydrolysis of tetrasodium pyrophosphate, sodium tripolyphosphate and polyphosphate blend under purified polyphosphatases and longissimus thoracis from beef using free reagent ion chromatography was observed. This could be helpful in understanding the mechanism of polyphosphate hydrolysis and in developing an optimal ratio of polyphosphates blends for meat and meat products in industry.
研究领域:
食品科学
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生物化学
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肉类技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Junqiao Jiang,Zhen Li,Min Xiao,Shuanjin Wang,Kenji Miyatake,Yuezhong Meng
Phosphoric acid (PA)-doped polymer electrolyte membranes are the most promising materials for high-temperature proton exchange membranes (HT-PEMs). However, their development is subject to the compromise between proton conductivity and phosphoric acid (PA) doping level. Here, an ether-free QPAF-4 membrane (a copolymer containing perfluoroalkylene and fluorenyl groups with pendant ammonium groups) is directly doped with phosphoric acid and studied as HT-PEMs. Due to the intrinsic micro-phase separation structure of QPAF-4 matrix and strong interaction of quaternary ammonium (QA)-PA, the PA-doped membranes possess high proton conductivity and eminent PA retention at comparatively low PA doping level, respectively. The QPAF-4 membrane with 150% PA uptake (QPAF-4-150%PA) offers a proton conductivity of 52 mS cm −1 at 160 °C. As expected, the single cell with QPAF-4-150%PA membrane shows the maximum peak power density of 683 mW cm −2 at 160 °C under anhydrous condition. Meanwhile, the single cell exhibits excellent durability over a period of 60 h with only a slight reduction in voltage of 3.1%. These results indicate that the as-prepared PA-doped quaternized polymer with micro-phase separation structure seems to offer a promising way to develop performing and long-life HT-PEMs with low PA doping levels.
研究领域:
材料科学
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燃料电池
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2011
·
IF 2.138
Chao Zou,Kui Cheng,Wenjian Weng,Chenlu Song,Piyi Du,Ge Shen,Gaorong Han
α-tricalcium phosphate (α-TCP), biphasic α/β-tricalcium phosphate (α/β-TCP) with different two phase ratio and β-tricalcium phosphate (β-TCP) powders were prepared by calcining an amorphous calcium phosphate (ACP) precursor at a temperature ranging from 800 to 900 °C. The microstructural characterization revealed that the particles in the monophasic and the biphasic TCP powders had about 1 μm in size, and agglomerated by 500 nm ones. In comparison with monophasic TCP powders, the dissolution–reprecipitation behaviors of the biphasic TCP powders in an acetate buffer solution with pH 5 were studied. The biphasic TCPs demonstrated a different behavior from the monophasic TCPs, including changes in morphology and crystalline phase. The unique behavior can be tailored by controlling the α-TCP content in the biphasic TCP powders.
研究领域:
材料科学
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生物医学工程
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化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Central South University
·
2024
·Vol. 31
·期 3
·796-812
·
IF 3.7
Guan Zhi-wen,Jiao Fen,Wang Xu,Qin Wen-qing,Fu Li-wen,Zhang Zheng-quan,Li Wei
In this paper, the inhibition ability of tetrasodium pyrophosphate (TSPP), sodium tripolyphosphate (STPP) and sodium hexametaphosphate (SHMP) to scheelite, fluorite and calcite was predicted by performance calculation and further verified by micro-flotation test. The results of hydrophile lipophilic balance (HLB) calculation, group electronegative calculation and micro-flotation test indicated that the inhibition ability of phosphate to the three minerals increases with the increase of the number of phosphate groups and the order of inhibition ability of the three inorganic phosphates was SHMP > STPP > TSPP. STPP had great potential for flotation separation of scheelite from fluorite and calcite. The order of inhibition ability of STPP against the three calcium-bearing minerals is calcite>fluorite>scheelite. The results of contact angle measurement, adsorption amount measurement, X-ray photoelectron spectroscopy (XPS) analysis and atomic force microscope (AFM) imaging presented that the adsorption of STPP on the fluorite and calcite surface was much larger than that on the scheelite surface. The weak adsorption of STPP on the scheelite hardly influenced the collection of sodium oleate (NaOL). STPP could complex with Ca 2+ on the surface of fluorite and calcite, and hinder the subsequent adsorption of NaOL. The results can provide guiding significance for the flotation of scheelite and the screening of inhibitors for calcium-bearing gangue minerals.
研究领域:
矿物加工工程
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化学工程与技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
He Qi,Zheng Li,Haijiao Zheng,Qiong Jia
Protein phosphorylation regulates the conformations and function of proteins, which plays an important part in organisms. However, systematic and in-depth analysis of phosphorylation often hinders on account of the low abundance and suppressed ionization of phosphopeptides. Various materials based on single enrichment mechanism show potential in phosphopeptides enrichment, but the enrichment performance is typically not satisfactory. Herein, we developed a carnosine (Car) functionalized magnetic metal organic framework designed as Fe 3 O 4 @NH 2 @ZIF-90@Car. Benefiting from the multiple recognition groups of Car and massive metal ions site of ZIF-90, the as-fabricated Fe 3 O 4 @NH 2 @ZIF-90@Car was utilized as a multifunctional material with synergistic effect for phosphopeptides enrichment. On the basis of combined immobilized metal ion affinity chromatography (IMAC) and amine-based affinity enrichment mechanism, Fe 3 O 4 @NH 2 @ZIF-90@Car exhibited higher enrichment performance of phosphopeptides compared with Fe 3 O 4 @NH 2 @ZIF-90 (single IMAC mechanism). Besides, the feasibility of Fe 3 O 4 @NH 2 @ZIF-90@Car nanocomposites in complicated samples was further verified by enriching phosphopeptides from nonfat milk, human fluids such as serum and saliva, demonstrating its bright application prospects in phosphoproteomics analysis.
研究领域:
生物化学
·
蛋白质组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 16
·2972
·
IF 3.06
Jiang-Zhen Qiu,Long-Fei Wang,Jiuxing Jiang
Two-dimensional aluminophosphate is an important precursor of phosphate-based zeolites; a new Sun Yat-sen University No. 6 (SYSU-6) with |Hada|2[Al2(HPO4)(PO4)2] has been synthesized in the hydrothermal synthesis with organic structure-directing agent (OSDA) ofN,N,3,5-tetramethyladamantan-1-amine. In this paper, SYSU-6 is characterized by single-crystal/powder X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, transmission electron microscopy, infrared and UV Raman spectroscopy, solid-state27Al,31P and13C magic angle spinning (MAS) NMR spectra, and elemental analysis. The single-crystal X-ray diffraction structure indicates that SYSU-6 crystallized in the space groupP21/n, with a = 8.4119(3), b = 36.9876(12), c = 12.5674(3), α = 90°, β = 108.6770(10)°, γ = 90°, V = 3704.3(2) Å3, Z = 4, R = 5.12%, for 8515 observed data (I > 2σ(I)). The structure has a new 4,12-ring layer framework topology linked by alternating AlO4and PO4tetrahedra. The organic molecules reside between the layers and are hydrogen-bonded to the inorganic framework. The new type of layer provides a greater opportunity to construct zeolite with novel topology.Keywords:aluminophosphate;2-D zeolite;SYSU-6
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）