Nature Communications
·
2022
·Vol. 13
·期 1
·1-13
·
IF 17.694
Li Siwu,Zhu Haolin,Liu Yuan,Han Zhilong,Peng Linfeng,Li Shuping,Yu Chuang,Cheng Shijie,Xie Jia
Potassium metal is an appealing alternative to lithium as an alkali metal anode for future electrochemical energy storage systems. However, the use of potassium metal is hindered by the growth of unfavourable deposition (e.g., dendrites) and volume changes upon cycling. To circumvent these issues, we propose the synthesis and application of nitrogen and zinc codoped porous carbon nanofibres that act as potassium metal hosts. This carbonaceous porous material enables rapid potassium infusion (e.g., < 1 s cm −2 ) with a high potassium content (e.g., 97 wt. %) and low potassium nucleation overpotential (e.g., 15 mV at 0.5 mA cm −2 ). Experimental and theoretical measurements and analyses demonstrate that the carbon nanofibres induce uniform potassium deposition within its porous network and facilitate a dendrite-free morphology during asymmetric and symmetric cell cycling. Interestingly, when the potassium-infused carbon material is tested as an active negative electrode material in combination with a sulfur-based positive electrode and a nonaqueous electrolyte solution in the coin cell configuration, an average discharge voltage of approximately 1.6 V and a discharge capacity of approximately 470 mA h g −1 after 600 cycles at 500 mA g −1 and 25 °C are achieved.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Cancan Yang,Chongyue Bai,Xiaoting Chen,Hamdy Khamees Thabet,Saad Alshammari,Yunlong Sun,Jiongru Li,Juanna Ren,Hassan Algadi,Xiangzheng Hu,Faming Gao,Dapeng Cui,Zhanhu Guo,Huige Wei
The increasing utilization of hyodeoxycholic acid (HDCA) additives in animal feed has created a pressing need for reliable detection methods. This study presents a novel non-enzymatic electrochemical platform for specific detection of HDCA using liquid nanocomposites from potassium-coordinated cyclodextrin metal-organic frameworks (K-CD-MOFs) immobilized on reduced graphene oxide (rGO) substrates. Employing neutral red (NR) as the probe, rGO-K-CD-MOFs@NR exhibits outstanding sensing performance with a wide linear detection range (5.0–100.0 μM), a high sensitivity (0.10 μA·μM −1 ), and low detection limit (1.97 μM, S/N = 3). The sensor also demonstrates exceptional selectivity for HDCA and maintains stable performance for six months under low-temperature storage conditions. The excellent performance originates from the synergistic effect between rGO's excellent electron transfer capability and K-CD-MOFs' unique host-guest recognition properties. This work not only provides an effective solution for HDCA monitoring in feed products but also offers a promising strategy for developing advanced electrochemical sensors for food safety and quality control applications in the animal husbandry industry.
研究领域:
电化学传感
·
纳米材料
·
食品安全
·
分析化学
·
畜牧业
✓ 已验证
产品关联
DOI
高影响因子
FOOD AND BIOPRODUCTS PROCESSING
·
2025
·
IF 3.4
Bin Li,Mengjing Zhou,Haibo Qin,Aolin Wu,Jiawei Li,Ying Wang,Zhigang Hu
This study aimed to investigate the synergistic effect between gelatin and κ-carrageenan on the structure and properties of bigels. Beeswax was used as the oleogelator, while gelatin and κ-carrageenan served as hydrogelators to prepare oleogels and hydrogels separately. The two gels were subsequently mixed in an ice-water bath to form bigels. By adjusting the ratio of gelatin to κ-carrageenan in the hydrogel phase, the microstructure, freeze–thaw stability, and rheological properties of the resulting bigels were systematically characterized. The results revealed that increasing gelatin content led to a reduction in interfacial tension within the aqueous phase, resulting in finer oil droplet dispersion and a more homogeneous and compact microstructure. The synergistic interaction between gelatin and κ-carrageenan enhanced the stability of the hydrogel network and improved its oil encapsulation capacity, thereby significantly improving the freeze–thaw stability of the bigels. Rheological analysis showed that an appropriate proportion of gelatin notably increased the storage modulus of the bigels, indicating a more robust internal structure. This study provides a novel strategy for the development of high-performance structured lipids for food applications.
研究领域:
食品科学
·
材料科学
·
胶体与界面科学
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shiying Wei,Jianfeng Huang,Yiting Wang,Qingqing Huang,Shuzhuo Bai,Koji Kajiyoshi,Yijun Liu,Zhenjiang Li,Liyun Cao,Jiayin Li
Tin sulfide (SnS) exhibits the potential to be used as a superior-performance electrode material for potassium ion batteries. However, serious volume expansion and poor ion transport capacity hinder the applications of SnS. In order to solve the above problems, this work designed a structure that parallel WS 2 sheets were embedded in SnS sheets (SnS/WS 2 @C). SnS/WS 2 @C displayed excellent kinetic properties and stability when applied to anode materials for potassium ion batteries, as well as a high reversible capacity. SnS/WS 2 @C maintains a superior specific capacity of 619 mAh g −1 after 100 cycles at 0.2 A g −1 and 210 mAh g −1 at 10 A g −1 . Such excellent performance is attributed to the fact that parallelly oriented WS 2 sheets provide fast channels for the transportation of potassium ions, which significantly improves the kinetic performance of the electrode, and can play an anchoring role for products in the process of charging and discharging by virtue of its excellent stability to effectively prevent structural fragmentation. This work provides new ideas for improving ion diffusion and enhancing the structural stability of transition metal layered compounds while maintaining the capacity advantage.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Zhenkun Li,Peifen Wang,Xinglong Zhang,Xiaowei An,Xuli Ma,Yongguo Li,Xiao Du,Xiaogang Hao,Guoqing Guan
In this study, a novel electrical Mn-based film was developed for selective potassium (K+) separation, in which delaminated MnOx was obtained with the assistance of Ho3+ using a facile coprecipitation method and coated on carbon paper with poly(vinylidene fluoride) (PVDF) and graphitized carbon black. With the scanning electron microscope (SEM) and transmission electron microscope (TEM) observations, it was found that abundant multiphase interfaces and lattice dislocations appeared on the bulk of Ho-MnOx. Brunauer–Emmett–Teller (BET) analysis verified that the delamination assisted by Ho3+ increased the specific surface area from 110.3 m2/g (MnOx) to 166.8 m2/g (1% Ho-MnOx), which should be beneficial for the exposing of more electrochemical active areas and active sites for K+ adsorption and separation. Particularly, 1% Ho-MnOx had a high concentration of oxygen vacancies and showed a better K+ adsorption ability than MnOx. It was considered that the adsorption of K+ was mainly affected by the ion memory toward K+ for the 1% Ho-MnOx. In addition, the 1% Ho-MnOx film had good stable retention and regeneration capability for the separation of K+; after 10 cycles of adsorption and desorption, the film still retained 87.24% of the maximum adsorption capacity for K+. It is expected to provide an effective preparation method to obtain a high-performance K+ removal film electrode for the separation of K+ under a low concentration.
研究领域:
材料科学
·
电化学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 6
·2526-2533
·
IF 3.5
Jia-Min Lyu,Shen Yu,Zhan Liu,He-You Du,Ming-Hui Sun,Chun-Mu Guo,Yi-Long Wang,Yu Li,Li-Hua Chen,Bao-Lian Su
Excessive emission of CO2 into the atmosphere has severely impacted the global ecological environment. Converting CO2 into valuable chemicals and fuels is of great significance for sustainable development. However, low activity and undesirable selectivity often result from the inherent inertness of CO2. Herein, K- or/and Zn-modified Fe-based catalysts were prepared by an incipient-wetness impregnation method for CO2 hydrogenation via a cascade reaction. The results indicate that K species exist as K2O while Zn species exist as ZnFe2O4. In the CO2 hydrogenation pathway, K2O facilitates the adsorption of CO2 and restrains the adsorption of H2, accelerating the transformation of CO2 into C2–C4 olefins rather than paraffins while Zn species promote the dispersion of Fe species, leading to improved activity. Synergistically, a K- and Zn-modified Fe-based catalyst (2Zn–10K–Fe/Al) shows excellent catalytic CO2 hydrogenation activity, achieving a CO2 conversion of 77% which is 1.8 times that (42%) of the unmodified Fe-based catalyst (Fe/Al). Our catalyst also shows a significantly promoted selectivity to C2–C4 olefins of 17% in comparison with the Fe/Al catalyst (0%). It is envisioned that such a binary effect of elements might contribute to the low-cost and industrial production of Fe-based catalysts for selective CO2 conversion.
研究领域:
催化化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYTOMEDICINE
·
2024
·
IF 6.7
Chao Ma,Qing-Long Miao,Xiang-Bin Song,Xiao-Yu Zhao,You-Zhi Li,Ming Zou,Wen-Li Tang,Shuai-Cheng Wu
Background Although colistin is widely recognized as the last line of antibiotics against gram-negative bacteria, the emergence and spread of colistin resistance severely diminish its clinical efficacy and application. An alternative strategy to alleviate this crisis is to identify promising colistin adjuvants with enhanced antibacterial activity. Purpose In this study, the adjuvant effects of paeonol on colistin and the underlying mechanisms were investigated. Method Minimum Inhibitory Concentration (MIC) and checkerboard assays were used to investigate the adjuvant activity and structure-activity relationship of paeonol on the antibacterial effect of colistin in vitro . Time-dependent killing and resistance development assays were used to investigate the bactericidal effects and emergence of colistin resistance. Different fluorescent probes and competitive inhibition tests were used to investigate bacterial membrane functions and potential targets. Skin infection and peritonitis-sepsis models were used to evaluate the combined in vivo effects of colistin and paeonol in vivo . Result Paeonol enhanced the antibacterial effects of colistin against gram-negative bacteria, particularly Klebsiella pneumoniae . Structure-activity relationship analysis showed that the hydroxyl, 4-methoxy and ketone carbonyl side chains of the benzene ring contributed to the adjuvant effect of paeonol. Paeonol enhances the bactericidal effects of colistin and minimizes the emergence of colistin resistance. Notably, mechanistic studies demonstrated that the combination of colistin and peonol enhances membrane disruption and oxidative damage, possibly via interactions with phosphatidylethanolamine (PE), phosphatidylglycerol (PG), and cardiolipin (CAL). Importantly, paeonol enhanced the efficacy of colistin in both the skin and peritonitis infection models. Conclusion This is the first report on the adjuvant potential of paeonol in colistin to combat K. pneumoniae by promoting membrane disruption and oxidative damage via targeting membrane phospholipids. Notably, the verified target, PE, provides an additional avenue for screening new colistin adjuvants.The combination therapy of paeonol and colistin is a promising strategy for treating infections caused by gram-negative pathogens to address antibiotic resistance issues.
研究领域:
药理学
·
微生物学
·
传染病学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Honglin Xu,Yongsheng Deng,Xinyu Wang,Ruilin Wang
The stable phase equilibrium of the ternary system NaVO3–KVO3–H2O at 298.15 K was investigated using the isothermal solution equilibrium method and the Schreinemaker wet residue method. The equilibrium liquid phase solubility data and physical property data [density (ρ), refractive index (nD), pH] were determined, and X-ray diffraction was utilized to verify the material composition of the equilibrium solid phase. Phase diagrams and physical property–composition diagrams were constructed based on the equilibrium solubility data and physical property data. The results show that the ternary system has a complex salt generation process with two invariant points, three univariate curves, and three crystalline phase regions corresponding to NaVO3·2H2O, KVO3, and Na2mKn(VO3)2m+n, respectively. The solid phase precipitated from a saturated NaVO3 solution at 298.15 K is NaVO3·2H2O, as confirmed by a comparison of experimental results and the literature. The chemical composition of the complex salt generated from the NaVO3–KVO3–H2O ternary system follows the general formula of the Na2mKn(VO3)2m+n complex salt proposed by Druzynski’s group, thereby validating the reliability of the present experiment. This study provides new experimental data for the preparation and separation of metavanadate.
研究领域:
化学热力学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Haiping Wang,Xingyu Wang,Xinmiao Liu,Shuwei Zhang,Shutong Meng,Wenjie Yan,Xin Zhang,Zhansheng Lu,Zenghui Qiu,Haijun Xu,Jiaqi He
Aqueous zinc-ion hybrid supercapacitors (ZHSCs) exhibit great potential for energy storage and conversion devices, owing to their inherent safety and cost-effectiveness. Nevertheless, the structure of traditional porous carbon cathodes hinders the zinc-ion diffusion kinetics, rendering the energy densities of conventional ZHSCs uncompetitive and severely impeding their practical applications. 2D transition metal carbides/nitrides, known as MXenes, exhibit excellent conductivity and abundant surface functional groups, qualifying them as ideal candidates for constructing high-capacity cathodes in high-performance ZHSCs. This study presents the fabrication of a ZHSC utilizing 3D porous K + -intercalated Ti 3 C 2 T X -reduced graphene oxide (K + -Ti 3 C 2 T X -RGO) hydrogel as cathode, paired with a zinc foil as anode. Upon treatment with KOH solution, Ti 3 C 2 T X undergoes K + ion intercalation into its nanosheets, resulting in partial elimination of terminal -F groups and expansion of the MXene interlayer spacing. Subsequently, large-scale graphene oxide (GO) was employed as a conductive binder to interconnect the intercalated multilayer Ti 3 C 2 T X , and a reducing agent was incorporated to facilitate self-assembly into a hydrogel. This approach augmented the accessibility of ions and facilitated their transport within the resultant structure. The ZHSC, fabricated with this composite cathode, synergistically integrates the supercapacitor’s high-power density and the battery’s high energy density. The results indicate that the ZHSC exhibited excellent electrochemical performance, featuring a high specific capacitance of 253.86 F g −1 at 1 A g −1 and an impressive energy density of 141.03 Wh kg −1 at 999.99 W kg −1 . Notably, after 5000 charge-discharge cycles at 10 A g −1 , the ZHSC maintained a capacitance retention rate above 87.96 %, highlighting its exceptional cycling stability.
研究领域:
材料科学
·
电化学能源
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2019
·Vol. 6
·期 8
·2308-2315
·
IF 3.975
Cai-ling Liu,Shao-hua Luo,Hong-bo Huang,Yu-chun Zhai,Zhao-wen Wang
Graphical Deficiency not insuffciency : Potassium-deficient layered P3-K 0.45 Mn 0.9 Mg 0.1 O 2 is prepared through a simple solid-state reaction and investigated as a cathode material for K-ion batteries. It exhibits excellent electrochemical performance. Novel, potassium-deficient, layered P3-K 0.45 Mn 0.9 Mg 0.1 O 2 is successfully prepared through a simple solid-state reaction method; its electrochemical performance as a cathode material for K-ion batteries is explored for the first time. The as-prepared K 0.45 Mn 0.9 Mg 0.1 O 2 delivers a high reversible capacity of 108 mAh g −1 at a current density of 20 mA g −1 in the potential region from 1.5 to 4.0 V. Moreover, the cyclability is enhanced by Mg substitution. After 100 cycles, the capacity of K 0.45 Mn 0.9 Mg 0.1 O 2 can remain at about 80.8 mAh g −1 at 20 mA g −1 . It also presents an excellent rate performance of 69.8 mAh g −1 even at a high current density of 200 mA g −1 . Furthermore, the potassium storage mechanism is studied by using the ex situ XRD technique. These results contribute to the development of rechargeable K-ion batteries based on earth-abundant elements.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2021
·Vol. 9
·期 2
·e202101351
·
IF 4.59
Gang Ni,Zhao Hao,Guo Yin Zou,Fu Hu Cao,Ling Qin,Cheng Gang Zhou
Graphical An aqueous Zn-based battery with a Berlin green cathode, a K/Zn hybrid electrolyte, and a zinc metal anode are developed. Owing to the rapid insertion and transportation of K ions in the cathode materials and the good compatibility of electrolytes to the metal anode, the hybrid battery delivers improved rate capability and cycle performance. : Aqueous rechargeable zinc-based batteries with the advantages of sustainability, safety, and low cost, are suitable for large-scale electrochemical energy storage applications. In this work, aqueous zinc-based batteries with low defect Berlin green (FeHCF) cathode, a hybrid zinc triflate and potassium triflate electrolyte, and zinc anodes are developed. In the hybrid electrolyte, the K + ions with the weak solvation effect and small electrostatic interaction are the dominant intercalation species in the FeHCF, resulting in the fast charge transfer process and rapid diffusion kinetics. The Zn 2+ ions stay at the surface rather than penetrate into the bulk phase. Thus, the hybrid batteries deliver a high specific capacity of 169.2 mAh g −1 at 100 mA g −1 , excellent rate performance with 45.7 mAh g −1 at 6 A g −1 , and good long-term cyclability with a capacity retention of 57 % over 1000 cycles at 1 A g −1 . The results suggest using aqueous K/Zn hybrid electrolytes can improve the electrochemical performance of FeHCF.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Energetic Materials
·
2019
·
IF 1.649
Qi Jia,Xueyuan Bai,Shaoyong Zhu,Xiong Cao,Peng Deng,Lishuang Hu
Nano (H2dabco)[K(ClO4)3] (DAP-2) were successfully prepared via the milling method. The morphology and structure of the as-obtained sample were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The results showed the nano DAP-2 with nearly spherical morphologies have a narrow particle size distribution ranged from 1μm to 2μm. The thermal decomposition properties were investigated by thermogravimetric-differential scanning calorimeter (TG-DSC). The exothermal peak of nano DAP-2 thermal decomposition is 384.5°C decreased by 6.7°C compared with raw DAP-2 (391.2°C). And the apparent activation energy (Ea) of nano DAP-2 was calculated as 173.346 kJ mol−1 by Kissinger equation, which is lower than raw DAP-2 (177.699 kJ·mol−1). Sensitivity study showed that the nano DAP-2 (H50: 60.63 cm) exhibited lower impact sensitivity than raw DAP-2 (H50: 36.79 cm). Therefore, this work provides a simple and effective way to improve the thermal decomposition properties and safety performance of molecular perovskite energetic materials.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）