JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Wangchang Li,Weichao Yang,Yao Ying,Jing Yu,Jingwu Zheng,Liang Qiao,Juan Li,Shenglei Che
FeSiAl soft magnetic composites (SMCs) with phosphate-silicone resin as the insulating layer were prepared by phosphating FeSiAl powder with K 3 PO 4 solution. The effects of K 3 PO 4 content on the microstructure and composition of the insulation coating were investigated. Further, the soft magnetic properties of SMCs were analyzed in detail. It is revealed that the annealed inorganic coating layer which predominantly consists of Al(PO 3 ) 3 , Al 2 O 3 , and P 2 O 5 exhibits a high resistivity, high temperature resistance and thin thickness, significantly reducing the eddy current loss. The outstanding magnetic properties of a power loss of 118.6 kW/m 3 (100 kHz, 0.1 T) and permeability of 63.8 were achieved for this high-quality thin insulation coating. Moreover, the magnetic loss was separated into hysteresis, eddy current and excess part, and the mechanism was analyzed in detail. The reduced total loss can be ascribed to the suppression of the eddy current. The novel SMCs coating with K 3 PO 4 are particularly suitable for applications in high frequency and high DC bias situations for switching power supplies, photovoltaic inverter boost inductors and other applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2023
·Vol. 120
·期 30
·e2301622120
·
IF 11.1
Qingfeng Fu,Chi Peng,Wang Zhou,Xiangni Zhang,Keke Yang,Lanzi Chen,Ying Mo,Jian-Fang Wu,Peng Gao,Changling Fan,Chaohe Xu,Zhaohui Wang,Jilei Liu
Potassium vanadium fluorophosphate (KVPO4F) is regarded as a promising cathode candidate for potassium-ion batteries due to its high working voltage and satisfactory theoretical capacity. However, the usage of electrochemically inactive binders and redundant current collectors typically results in inferior electrochemical performance and low energy density, thus implying the important role of rational electrode structure design. Herein, we have reported a scalable and cost-effective synthesis of a cellulose-derived KVPO4F self-supporting electrode, which features a special surface hydroxyl chemistry, three-dimensional porous and conductive framework, as well as super flexible and stable architecture. The cellulose not only serves as a flexible substrate, a pore-forming agent, and a versatile binder for KVPO4F/conductive carbon but also enhances the K-ion migration ability. Benefiting from the special hydroxyl chemistry-induced storage mechanism and electrode structural stability, the flexible freestanding KVPO4F cathode exhibits high-rate performance (53.0% capacity retention with current densities increased 50-fold, from 0.2 C to 10 C) and impressive cycling stability (capacity retention up to 74.9% can be achieved over 1,000 cycles at a rate of 5 C). Such electrode design and surface engineering strategies, along with a deeper understanding of potassium storage mechanisms, provide invaluable guidance for better electrode design to boost the performance of potassium-ion energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
THERMOCHIMICA ACTA
·
2012
·
IF 1.805
Yang Lu,Juan Han,Chengzhuo Sheng,Ping Yu,Zhenjiang Tan,Yongsheng Yan
The phase diagrams for the systems containing polyoxyethylene (10) lauryl ether (POELE10) and three salts (KOH, K 2 CO 3 and K 3 PO 4 ) have been determined experimentally. Three experiential equations were used to correlate the binodal data. The liquid–liquid equilibrium data of these systems were obtained by experimental method and calculated method using lever rule. The tie-line data were correlated by using Othmer-Tobias and Bancroft and simple Setschenow-type equations. Furthermore, the effect of salt on the binodal curve for the studied systems has been discussed by means of salting-out coefficient, effective excluded volume (EEV) and Gibbs free energy of hydration of the ions (Δ G hyd ). It was found that the salts composed of anion with a higher valence are better salting-out agents than those with a lower valence. The order of salting-out abilities of salts is K 3 PO 4 > K 2 CO 4 > KOH for the investigated systems. Finally, the phase-separation ability of POELE10 is more powerful compared with that of other polymers and two-phase can easily form at the lower concentration, which indicates that lower cost is a remarkable advantage of POELE10–salt ATPSs.
研究领域:
化学
·
生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Yuanxin Zhao
Isobutanol is a promising biofuel that can be produced via fermentation. However, its separation from water is challenging due to the formation of an azeotrope during distillation. This study investigates the effects of K3PO4 concentration and temperature on the phase separation of isobutanol–water azeotropes. Results show that increasing salt concentration significantly enhances isobutanol recovery and dehydration efficiency, while temperature has a relatively minor effect. Isobutanol recovery exceeded 99.9% and dehydration ratios surpassed 90% at higher salt concentrations, with minimal influence from temperature. The water content in the isobutanol-rich phase decreases sharply with salt addition, and the solubility of isobutanol in the aqueous phase shows a strong logarithmic decline. A good linear fit (R2 > 0.997) confirms the reliability of the correlation. These findings demonstrate that salting-out using K3PO4 is a highly effective strategy for improving the separation of fermentation-based isobutanol.
研究领域:
生物化工
·
分离科学
·
生物能源
·
工业微生物学
·
过程工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Chenxi Yi,Benfeng Zhu
The inhibiting behavior of K 4 P 2 O 7 , C 2 H 5 O 6 P and their mixture on Q235 steel corroding in the simulated stratum water has been investigated by using electrochemical noise (EN) and electrochemical impedance spectroscopy (EIS) techniques. The results show that the physical adsorption of KPP onto Q235 surface at 60 °C is somewhat faster than the chemisorption of HPAA. In the re-plotted energy distribution plot, the difference of the region where the EN energy is mostly accumulated may be adopted to distinguish the chemisorption and physical adsorption of inhibitors. Finally, the variation tendency of the charge transfer resistance obtained by EIS technique is just opposite to that of fractal dimension obtained by EN technique, which may hint that the initial corrosion processes of metals can be in-situ monitored by using EN technique expediently.
研究领域:
材料科学
·
电化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jianshun Feng,Mingxiu Hou,Qian Zhang,Dong Wang,Zhenjiang Li,Jie Liu,Yumin Wu,Lei Wang
Designing robust binders has been demonstrated to be an effective and facile strategy to stabilize Si anodes. However, the binders that performed well for Si nanoparticles are not applicable for low-cost and accessible Si micron-powders. Hence, a novel binder design strategy is still greatly required for practical micron-Si anodes. Herein, a robust water-based network binder (named as c-PTP-Alg) has been designed via coupling potassium tripolyphosphate (PTP) inorganic oligomer with alginic acid (Alg) organic macromolecule. Owing to the unique structure of PTP, a network with high mechanical resistance can be constructed in c-PTP-Alg binder via strong ion-dipole interactions. Moreover, the highly soluble and dispersed PTP inorganic oligomer in water prevents the organic macromolecule from aggregation. This induces a homogeneous texture in the c-PTP-Alg binder, which enables the polar groups in the composite binder to anchor micron-Si particles efficiently. Therefore, by simply applying the c-PTP-Alg binder, a significantly improved electrochemical performance of micron-Si anode with a high reversible capacity of 1599.9 mAh g −1 after 100 cycles at 3000 mA g −1 has been obtained. More specially, the high-energy-density Si||S-PAN full cells have also been constructed, showing the practical application prospect of the c-PTP-Alg binder.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Taiping Tian,Tao Wang,Xueer Ning,Pengxu Ren,Qian Liu,Dongling Wu
The utilization of coal combustion supports the long-term stable development of the socio-economy, but slagging and ash deposition phenomena constrain its efficient utilization. This study employed a co-precipitation method to prepare a layered PO 4 3− -intercalated magnesium–aluminum hydrotalcite (MAP) additive to improve coal ash fusion characteristics. Combustion experiments demonstrated that the MAP additive significantly increased the ash fusion temperature of Naomaohu coal (NC) (the softening temperature rose from 1161 °C to 1393 °C) while reducing fine particulate matter generation. The mechanisms include: (1) solid-phase reconstruction: promoting the phase transformation of low-melting-point alkaline minerals (e.g., anorthite, nepheline, anhydrite) into high-melting-point crystals (e.g., akermanite, forsterite, magnesium calcium phosphate); (2) ion immobilization: layered phosphates capturing alkali metal ions (Na + , K + ) through ion exchange. The dual mechanisms synergistically altered ash particle distribution: the peak particle size of fine particles (PM 1 ) shifted from 0.03 μm to 1.05 μm, the proportion of coarse particles (PM 2.5 ) increased by 48 %, and the peak distribution expanded from 2.46 μm to 3.64 μm. Concurrently, the surface adhesion of ash was reduced, enhancing dispersion efficiency and effectively inhibiting slagging and ash deposition. The MAP additive exhibits excellent potential for regulating ash fusion behaviour, providing a novel strategy for the clean and efficient utilization of coal.
研究领域:
燃料化学
·
燃烧工程
·
无机材料化学
·
能源利用
·
煤清洁利用
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2025
·
IF 6.4
Jianlong Huang,Wenhu Wang,JuanJuan Lu,Feng Yu,Jian Han
Two examples of molybdate phosphates, K6Mo8PO29OH·H2O and K6Mo5P2O23·7H2O, were designed and synthesized using a hydrothermal method, introducing strongly distorted [MoO6] octahedral groups. K6Mo8PO29OH·H2O crystallizes in the centrosymmetric space group Cmcm, where each [PO4] combines [Mo4O15] and [Mo4O14(OH)] groups to form a unique [Mo8PO29(OH)] cluster. K6Mo5P2O23·7H2O crystallizes in the non-centrosymmetric space group P212121, where two [PO4] link [Mo5O21] groups to form a closed hollow ellipsoidal [Mo5P2O23] cluster. They possess wide experimental band gaps of 3.57 and 3.34 eV, respectively. Compared to K3PO4, the introduction of strongly distorted [MoO6] octahedral groups enhances their birefringence from 0.006 to 0.127 and 0.077@1064 nm (about 21 × and 11 × K3PO4), with the source of the birefringence being dominated by the contribution of strongly distorted [MoO6] octahedral groups. The relationship between its structure and optical properties is analyzed based on first-principles calculations. This work effectively enhances the birefringence properties of phosphate crystals by introducing highly distorted [MoO6] groups, providing insights for designing and synthesizing ultraviolet optical crystal materials with superior performance.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Mei Dai,Liangkai Wu,Juncong Zou,Dexin Wang,Xiang Li,Shaohua Wu,Xinxing Zhou,Chunping Yang,Shanying He
Liquid-phase advanced oxidation processes (AOPs) offer a promising approach for enhanced VOC removal. However, hampered by low gas-liquid mass transfer efficiency and insufficient reactive oxygen species production, the efficient elimination of hydrophobic VOCs remains a challenge. This study evaluated the enhancement of aromatic hydrocarbon elimination from gas streams by adding H 2 O 2 or peroxymonosulfate (PMS) to ozone micro-nano bubbling (O 3 /MNB) technology. Results indicated that MNB increased the O 3 mass transfer coefficient (K L a) to 0.17 min −1 , 4.9 times that of conventional macrobubbling. Under an inlet load of (16 ± 0.8) g·m −3 ·h −1 and empty bed contact time (EBCT) of 45 s, adding H 2 O 2 or PMS markedly increased VOC removal. The O 3 /MNB/H 2 O 2 system achieved removal efficiencies of 86%, 83%, and 86% for benzene, toluene, and xylene, corresponding to elimination capacities of (13.76 ± 0.69), (13.28 ± 0.66), and (13.76 ± 0.62) g·m −3 ·h −1 , respectively. In the O 3 /MNB/PMS system, the removal efficiencies for these compounds were 91%, 80%, and 83%, with elimination capacities of (14.56 ± 0.73), (12.80 ± 0.64), and (13.28 ± 0.23) g·m −3 ·h −1 , respectively. Electron paramagnetic resonance (EPR), quenching tests, and probe experiments revealed that O 3 /MNB/H 2 O 2 system primarily utilized hydroxyl radicals (•OH) and singlet oxygen ( 1 O 2 ), whereas O 3 /MNB/PMS system employed •OH and sulfate radicals (SO 4 •- ). System optimization demonstrated that the O 3 /MNB/H 2 O 2 system showed optimal performance for moderate-to-low concentration waste streams under controlled pH, while the O 3 /MNB/PMS system exhibited superior adaptability for complex, high-concentration exhausts across broad pH ranges. This work provides a theoretical basis for industrial hydrophobic VOC treatment and insights into advanced low-temperature control technologies.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2026
·
IF 6.7
Shengpeng Xia,Liang Zhu,Wei Cai,Hanle Cai,Yutao Zhang,Zhongqing Ma
Alkali and alkaline-earth metals (AAEMs) are inherently present in biomass and exert pronounced influences during thermochemical conversion. However, the effects of different AAEM salt systems on the pyrolysis behavior and product distribution of individual biomass components remain insufficiently understood. In this work, the effects of representative AAEM salt systems based on different cations (K + , Na + , Ca 2+ , and Mg 2+ ) and potassium salts with different counter-anions (Cl - , CO 3 2- , HCO 3 - , SO 4 2- , PO 4 3- , and CH 3 COO - ) on the fast pyrolysis of cellulose, hemicellulose (xylan), and lignin were systematically investigated using thermogravimetric analysis coupled with detailed product characterization. The results demonstrate that AAEM salt composition strongly influences thermal decomposition behavior, product evolution, and carbon partitioning among char, bio-oil, and gas phases. Under chloride salt conditions, monovalent cations (K + and Na + ) generally promote depolymerization-related transformations and moderate formation of sugars or oxygenated compounds, whereas divalent cations (Ca 2+ and Mg 2+ ) induce distinct changes in ring-opening, dehydration, and furan-related product formation, likely associated with stronger interactions with oxygen-containing structures. Different potassium salt systems exhibit distinct product distributions, indicating that K + availability and counter-anion-associated chemistry, contribute to the observed pyrolysis behaviors. Phosphate- and sulfate-containing salts show stronger tendencies toward carbon retention, whereas acetate-, bicarbonate-, and carbonate-containing systems lead to different distributions of volatile oxygenates and hydrocarbons. In xylan pyrolysis, K 2 CO 3 - and KHCO 3 - -containing systems generate contrasting hydrocarbon and oxygenated product distributions, highlighting the influence of salt composition on intermediate transformation under intensified salt–biomass interactions. Overall, AAEM effects depend on metal species, counter-anion chemistry, biomass composition, and loading conditions. Lower AAEM concentrations favor stabilization of primary pyrolysis intermediates, whereas higher loadings promote secondary conversion processes that redistribute products among char, bio-oil, and gas phases. These findings provide mechanistic insights into the role of AAEM salts in biomass pyrolysis and offer guidance for tailoring product distributions toward renewable chemicals and carbon-rich materials.
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2025
·
IF 3.9
Xiaoqing Sun,Chongwen Yu,Xingyao Liu,Taolve Wang,Xigao Jian,Yujie Song,Jian Xu
Polyimide (PI) exhibits good thermal performance and high stability due to its highly rigid main chain and excellent mechanical properties, making it an ideal electrochromic material. However, its applicability is limited by poor solvent solubility, which results from the rigid backbone, and film yellowing, caused by charge-transfer complexes (CTC). Herein, a novel phenothiazine-based diamine (THZ-DA) was synthesized, where a universal joint-like structure was constructed during its formation. The introduction of the non-coplanar universal joint reduced intermolecular interactions and suppressed CTC formation, improving the solubility and enabling high transmittance of THZ-PIs in the neutral state. Moreover, the lone pair of electrons on the nitrogen atom of THZ allowed for the formation of a cationic radical (THZ+·) under electrochemical oxidation, which was stabilized by the resonance effect, enabling reversible color switching between colorless and orange–red state. Among the three systems, THZ-b, composed of THZ-DA and 3,3’,4,4’-biphenyl tetracarboxylic dianhydride, showed the best thermal stability, with a Td5% above 406 °C and Tg of 347 °C. It also exhibited good electrochemical cycling stability, with redox potentials of 1.09 and 0.88 V, as well as excellent electrochromic performance, achieving an electrochromic efficiency of 222 cm2 C–1. These results show the application potential of THZ-PI in smart windows and adaptive camouflage.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Xi Chen,Jiahao Wang,Xinyu Pang,Jiaying Hu,Yi Zhuang,Hao Qiu,Ye Song,Xufei Zhu
In this study, the anodizing processes of aluminum in oxalic acid solution (pH ≈0.98) and alkaline aqueous solution (pH ≈12.86) were compared. The channels of porous anodic alumina (PAA) obtained from the two electrolytes were characterized by FESEM. The pore-branching channels of PAA were obtained by anodizing aluminum in an alkaline aqueous solution of potassium phosphate. The pore-branching channels of PAA cannot be clarified by the acidic field-assisted dissolution theory (FADT). In this article, the formation mechanism of PAA under alkaline conditions is explained by the oxide viscous flow model around the oxygen bubble model and electronic current theory. The pore diameter of porous anodic alumina formed in potassium phosphate electrolyte (≈90 nm) is larger than that formed in oxalic acid conditions (≈25 nm) because there are two oxygen bubbles at the large bottom, which is conducive to the formation of pore-branching channels.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）