INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
·
IF 8.025
Zhengxian Wang,Jiankang Lu,Chengyi Wu,Youmeng Dan,Guoxiang Li,Deyong Wu,Sheng Hu
Poly(N-isopropyl acrylamide) and its derived copolymer, as a temperature-responsive material, are widely used in the field of anticancer drug carrier. And it also plays an important role as carrier in slow-release fertilizer in recent years. In this paper, a smart poly(N-isopropyl acrylamide- co -acrylamide)-coated Alg-BMOF (PABMOF) was fabricated in ionic liquids microemulsion ([Bmim]PF 6 /TX-100/water) as nano-reactor. The structure and morphology of PABMOF were characterized by FT-IR, XRD, XPS, SEM, TG and BET. The resultant PABMOF was used as a adsorbent for H 2 PO 4 − adsorption. The adsorption kinetics , isotherms and mechanism of H 2 PO 4 − onto the resultant PABMOF were studied. The adsorption kinetic data was well suitable for pseudo-second-order kinetic model, and adsorption isotherm results demonstrated that the equilibrium data was fitted for Freundlich model. The water-holding and water-retention capacity of soil with TRSRFs addition of 2 wt% were74.3% and 52.13% at 30th day, respectively. Moreover, the release behavior of TRSRFs in water show that the cumulative release rate (C r %) were 81.4% at 45 °C and 97.6% at 25 °C within 172 h, which displayed the excellent temperature-responsive property. The effect of TRSRFs on the growth of Chinese cabbage was investigated, which was indexed with the germination rate, plant height and root length of the crop.
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高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Yijie Zhang,Leran Liu,Jinwei Wang,Rui Yao,Yun Wu,Muheng Wang,Qiang Zhao,Jinping Li,Guang Liu
Rational design and construction of electrocatalysts that can work well at large current densities are imperative for water splitting. Herein, a multi-stage P–Ni 3 S 2 /NiFe/NF electrocatalyst was rationally designed by introducing heteroatoms (S and P) and heterostructure construction. Benefitting from the optimized electronic structure configuration by the synergistic incorporation of S and P, the as-prepared P–Ni 3 S 2 /NiFe/NF electrocatalyst exhibits remarkable activity and stability towards oxygen evolution reaction (OER) in alkaline media , yielding ultralow overpotentials of 250 mV and 372 mV at the current densities of 100 mA/cm 2 and 1000 mA/cm 2 , respectively. Moreover, its multi-stage heterostructure also endows the electrocatalyst with unique multifunctional properties, making it can realize overall water splitting under a low cell voltage of 1.57 V at 10 mA/cm 2 , and has long-term stability. This work demonstrates the importance of rational introduction of heteroatoms and interface/surface engineering for advanced electrocatalytic materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Dongfeng Sun,Songmin Lin,Yuan Yu,Shengwei Liu,Fangyou Meng,Gaohui Du,Bingshe Xu
Transition metal phosphides are novel electrocatalysts that can be used to replace noble metals for the electrochemical production of hydrogen. In this work, N and P co-doped carbon-coated cobalt-doped molybdenum phosphide (CoMoP@N,P-C) nanoparticles are explored as electrocatalyst for overall water splitting. The presence of a unique three-dimensional (3D) porous structure in CoMoP@N,P-C offers abundant catalytic active sites for the penetration of the electrolyte solution, thereby facilitating the transfer of ions. In addition, cobalt doped into MoP increases the catalytic activity, and N and P co-doped carbon improves the electrical conductivity of the carbon matrix. Subsequently, the synergy between CoMoP cores and N, P-C shells enhances the total hydrolysis performance of the electrocatalyst in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) processes. At a current density of 10 mA/cm 2 in 1 M KOH, HER and OER overpotential of the CoMoP@N, P-C are 152 mV and 296 mV, respectively. Moreover, the cell voltage of CoMoP@N, P-C as a bifunctional electrode for overall water splitting is 1.62 V (at 10 mA/cm 2 ), which is close to that of the full noble-metal electrode (RuO 2 || Pt/C, 1.58 V). Overall, the CoMoP@N, P-C bifunctional catalyst shows great potential for replacing noble-metal electrodes in water splitting applications.
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NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 47
·22335-22343
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IF 3.591
Siqi Wei,Haoyi Li,Xinghang Yin,Qiang Yang,Anli Chen,Renjie Li,Jing Wang,Rui Yang
Synthesizing high-efficiency red carbon dots (R-CDs) and exploring their photoluminescence mechanism remain challenges as well as critical issues hindering the development of red room-temperature phosphorescence (RTP) materials of CDs. Herein, a series of highly efficient R-CDs are prepared from citric acid and formamide by solvothermal method on account of the protective and destructive effects of solvents. The larger sp2 conjugated domains of the carbon core and the high content of graphitic N are identified as the key factors for R-CDs to exhibit red fluorescence. Surface groups also contribute to red emission by means of the formation of the N, O-related defect state. By establishing N-doping models and using DFT calculation, it is further demonstrated that the strong p–π conjugation effect caused by the non-bonding electrons of graphitic N would facilitate HOMO–LUMO splitting of the carbon core, thus leading to a significant decrease in the HOMO–LUMO gap. Energy level splitting could lead to a certain degree of energy level crossing, which could contribute to effective intersystem crossing and produce red RTP. From this, the potential applications of R-CDs in the information encryption field are proposed and demonstrated.
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JOURNAL OF MEDICINAL CHEMISTRY
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2016
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IF 5.589
Jianyong Zhu,Ruimin Wang,Lanlan Lou,Wei Li,Guihua Tang,Xianzhang Bu,Sheng Yin
The phytochemical study of Pedilanthus tithymaloides led to the isolation of 13 jatrophane diterpenoids (1–13), of which eight (1–8) are new. Subsequent structural modification of the major components by esterification, hydrolysis, hydrogenation, or epoxidation yielded 22 new derivatives (14–35). Thus, a jatrophane library containing two series of compounds was established to screen for P-glycoprotein (Pgp)-dependent MDR modulators. The activity was evaluated through a combination of Rho123 efflux and chemoreversal assays on adriamycin resistant human hepatocellular carcinoma cell line HepG2 (HepG2/ADR) and adriamycin resistant human breast adenocarcinoma cell line MCF-7 (MCF-7/ADR). Compounds 19, 25, and 26 were identified as potent MDR modulators with greater chemoreversal ability and less cytotoxicity than the third-generation drug tariquidar. The structure–activity relationship (SAR) was discussed, which showed that modifications beyond just increasing the lipophilicity of this class of Pgp inhibitors are beneficial to the activity. Compound 26, which exhibited a remarkable metabolic stability in vitro and a favorable antitumor effect in vivo, would serve as a promising lead for the development of new MDR reversal agents.
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高影响因子
Nano-Micro Letters
·
2023
·Vol. 15
·期 1
·1-20
·
IF 26.6
He Hualing,Qin Yi,Zhu Zhenyu,Jiang Qing,Ouyang Shengnan,Wan Yuhang,Qu Xueru,Xu Jie,Yu Zhicai
The p – n segment thermoelectric aerogel fiber was fabricated through an alternating coaxial wet-spinning strategy.
Resultant alternating p – n segment thermoelectric fiber was electrically connected in series (two p – n pairs with a length of 3 cm) with an outstanding electrical conductivity of 23.76 S m −1 .
Thermoelectric textile-based self-powered fire warning electronics exhibited sensitivity (trigger time within 1.43 s) and repeatable temperature sensing performance for firefighting clothing.
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高影响因子
Materials Advances
·
2023
·
IF 5
Xamxikamar Mamat,Zehong Gao,Longyi Chen
Over use or long term exposure of acetaminophen (APAP) could cause severe damage to human health. Currently APAP related events is still a global burden. Therefore, secure management of APAP is important for avoiding possible APAP induced incidents. Rapid sensing of APAP in human body fluids can help in better moniotoring of the health condition and provide information for necessary medical aid. Electrochemical sensor utilizing functional nanomaterials and nanostructures have been proved to be a facile approach for sensing APAP in human body fluids. Among various fucntional nanmaterials, the transition element doped Fe3O4 nanoparticle decorated carbon materials have found extensive applications in catalysis, energy and environmental etc. areas. In order to explore the versatility of Zn doped Fe3O4 nanoparticle incorporated with biomass carbon electrocatalyst in electrochemical sensing area, we prepared the N, S and P doped biomass carbon material (NSP-BC) from the biomass of Elaeagnus Angustifolia gum through pyrolysis approach. Then, facile one-pot polyol solvothermal synthesis method was adpoted for deposition of Zn doped Fe3O4 nanoparticle onto the NSP-BC. Among the synthesized electrocatalysts, the Zn/Fe ratio of 0.132 electrocatalyst was found to show the highest Ipa response current towards APAP molecule. The electrocatalysts were systematically characterized by scanning electron microscope, energy-dispersive X-ray spectroscopy, element mapping, X-ray photoelectron spectroscopy, X-ray powder diffractometer, Raman spectroscopy, inductively coupled plasma-optical emission spectroscopy and electrochemical analysis. The electrocatalyst modified glassy carbon electrode sensor achieved a wide linear sensing range of APAP from 2.5 to 500 μM covering urinary physiological APAP concentration range with a limit of detection of 63.9 nM and a sensitivity of 0.64 μA μM-1 cm-2. The electrocatalyst modified GCE sensor also exhibited satisfactory recovery rates of APAP in urine samples. This facile synthesized Zn-doped Fe3O4 nanoparticle @ NSP-BC electrocatalyst has potential application in clinical diagnostics and pharmaceutical analysis.
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FIBERS AND POLYMERS
·
2021
·Vol. 22
·期 6
·1664-1674
·
IF 2.153
Qin Siyuan,Tian Yanhong,Zhang Xuejun,Wu Yifan
A class of N-P-Si-containing synergistic flame retardant T-K, the phosphoric triamide (TEDAP, T) modified with epoxy silane coupling agent KH560 (K) on molecular polarity and structure, was successfully synthesized and utilized as sizing agent of carbon fiber (CF) for surface treatment in carbon fiber reinforced epoxy (CF/EP) composites. Time of flight mass spectrometer (TOF-MS) and Fourier transform infrared spectroscopy (FT-IR) results showed the successful synthesis of T-K and different degrees of oligomerization of T. Scanning electron microscope (SEM) and interlaminar shear strength (ILSS) characterized the surface and interface morphology of CF and relevant composites, indicating that the interface performance was preserved under selected T-K structure. Thermogravimetric (TG) and limiting oxygen index (LOI) testing results reflected the delayed decomposition of CF on T −5% from 450 °C to 700 °C, and increased LOI values of composites from 34% to 44%, illustrating the significant enhancement on flame retardancy in composites by the application of T-K.
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高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 24
·5270-5276
·
IF 6.569
Shiwei Liu,Jiale Chen,Hongping Wu,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu
The dimensional reduction theory is applied to an A2O–P2O5–Bi2O3 system where P2O5 serves as a binary parent while A2O and Bi2O3 are regarded as dimensional reduction agents. Thus, three novel phosphates ACs5Bi4(PO4)2(P2O7)3 (A = K, Rb and Cs) have been prepared through the high-temperature solution method. Single-crystal X-ray diffraction measurements reveal that they all crystallize in the monoclinic space group P21/c (no. 14) and in their structures, two different kinds of P–O units, i.e. isolated PO4 tetrahedra and P2O7 dimers, are interconnected by Bi–O groups to construct a 3∞[Bi4(PO4)2(P2O7)36−] framework. Note that with the change of cationic size in their structures, the Bi3+ cations also exhibit flexible coordination, i.e. BiO5 and BiO6 polyhedra in KCs5Bi4(PO4)2(P2O7)3 and only BiO6 polyhedra in Cs6Bi4(PO4)2(P2O7)3, suggesting that combining the flexible coordination of Bi3+ cations with phosphates based on dimensional reduction theory is an effective strategy to guide the synthesis of new compounds.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Huijiao Wang,Zhongyi Li,Fengyuan Zhang,Yuxiang Wang,Xian Zhang,Jianbing Wang,Xuwen He
Three types of Magnéli phase anodes (Ti/Ti 4 O 7 , Ti/Ti 4 O 7 -PbO 2 -Ce, and Ti/Ti 4 O 7 nanotube arrays (NTA)) were fabricated, characterized, and compared with other typical active and non-active anodes (i.e., BDD, Ti/Pt, Ti/RuO 2 -IrO 2 , and Ti/IrO 2 -Ta 2 O 5 ) for electro-oxidation treatment of p -nitrophenol (PNP) solution and a real coal chemical concentrated brine in this study. Characterization results indicate a nanotube array structure of Ti/Ti 4 O 7 NTA, and a compact coating of Ti 4 O 7 microparticles and PbO 2 -Ce nanocrystals on the Ti substrate for Ti/Ti 4 O 7 and Ti/Ti 4 O 7 -PbO 2 -Ce, respectively. The three anodes present relatively high oxygen evolution potentials (2.16–2.44 V vs SCE), showing good capacity of electro-generating reactive oxidative species for pollutant degradation. After 30 min of EO treatment, Ti/Ti 4 O 7 NTA and Ti/Ti 4 O 7 removed 89–92% of PNP, which were 10–60% higher than Ti/Pt, Ti/RuO 2 -IrO 2 , and Ti/IrO 2 -Ta 2 O 5 , and were almost comparable with BDD (95%). Furthermore, Ti/Ti 4 O 7 NTA and Ti/Ti 4 O 7 kept very efficient for mineralization of PNP solution and real coal chemical concentrated brine. For Ti/Ti 4 O 7 -PbO 2 -Ce, its degradation efficiency was lower than other two Magnéli phase anodes, but still competitive compared with other active anodes. Thanks to their high removal efficiencies, the three Magnéli phase anodes required relatively low energy demand for pollutant mineralization. Besides, operational parameters such as electrolyte and current density were also very significant for efficient pollutant removal. The results of this study suggest Magnéli phase electrodes as promising and cost-effective anode materials for industrial wastewater treatment, with Ti/Ti 4 O 7 NTA and Ti/Ti 4 O 7 being more efficient options.
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高影响因子
Biomaterials Science
·
2021
·Vol. 9
·期 11
·4199-4210
·
IF 6.843
Hao Li,Mengna Li,Pei Liu,Kaiyang Wang,Haoyu Fang,Junhui Yin,Daoyu Zhu,Qianhao Yang,Junjie Gao,Qinfei Ke,Hongping Yu,Yaping Guo,Youshui Gao,Changqing Zhang
Due to the native skin limitations and the complexity of reconstructive microsurgery, advanced biomaterials are urgently required to promote wound healing for severe skin defects caused by accidents and disasters. Accumulating evidence has supported that substance P (SP) has a potential effect on skin regeneration. However, SP application is seriously impeded by its poor stability and oxidative reactions occurring during production, transportation, and storage. An SP-conjugated chitosan hydrochloride hydrogel (CSCl–SP) fabricated in this study demonstrated an enhanced capacity to repair full-thickness skin defects. CSCl–SP provided a stable in vitro delivery system for SP. The dissolution of CSCl–SP promoted the proliferation, migration, and tube formation, as well as angiogenesis-related gene and protein expression in human umbilical vein endothelial cells. CSCI-SP also stimulated the proliferation, migration, and production of anabolic growth factor in human fibroblasts. Moreover, CSCl–SP significantly promoted the neurite outgrowth in Neuro-2A cells. In vivo, CSCl–SP dramatically strengthened the vascularization, extracellular matrix deposition and remodeling, and nerve regeneration, thereby promoting efficient recovery of the full-thickness skin defect. Thus, synchronized multifunction of the CSCl–SP hydrogel makes it a promising and smart material for intractable skin defects.
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高影响因子
POLYMER
·
2020
·
IF 4.231
Yufei Liu,Siyuan Jiang,Wei Yan,Jun Qin,Min He,Shuhao Qin,Jie Yu
Improving complexation at the interfaces and regulating the crystal transformation behaviors of polyamide 6 (PA6) composites with high mechanical and thermal properties are essential for the industrial applications of PA6. In this work, the effects of adding p (N-(4-F-phenylmaleimide)-alt-styrene) (PFS) on the crystal transformation, thermostability, thermal conductivity , and mechanical properties of PA6 were investigated and discussed systematically. The resu---lts from heat deflection temperature (HDT), dynamic mechanical analysis (DMA ) and thermal conductivity tests indicate that PFS greatly increases the HDT, glass-transition temperature ( T g ), and thermal conductivity of PA6. Simultaneously, when the content of PFS is 10%, the tensile strength and flexural moduli of PA6/PFS composites are increased by 10.5 and 17.8% compared with that of pure PA6, respectively. The results from differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) show that PFS induces the transformation of PA6 from γ to α crystals by interfacial complexation. This work offers a facile approach for producing materials with high thermal and mechanical performances that can be potentially used in automobiles, electronics, and related technologies.
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危险品化学品经营许可证（带存储）