JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2019
·
IF 3.571
Yu Lu,Jie Liu,Yue Jia,Yuerong Yang,Qinghui Chen,Lujia Sun,Shuang Song,Linjuan Huang,Zhongfu Wang
Human milk oligosaccharides are complex carbohydrates with multibiofunctional health benefits to newborns. Human milk free oligosaccharides (HMOs) are well characterized. However, changes in the N/O-glycome during lactation are poorly reported. Herein, we qualitatively and quantitatively investigated N/O-glycome profiles and their alteration in human milk at different lactation stages. N-Glycans were mainly fucosylated and nonsialylated, nonfucosylated throughout lactation. O-Glycans mainly consisted of sialylated and nonsialylated, nonfucosylated in colostrum and transitional milk, and fucosylated and nonfucosylated, nonsialylated in mature milk. Fucosylated and sialylated N-glycans gradually decreased and increased, respectively, as lactation progressed; O-glycans showed the reverse. Interestingly, changes in HMO abundance decreased during lactation, complementing HMG N/O-glycome changes. In conclusion, temporal HMG glycosylation changes provide the groundwork for developing infant formula that is closer to breast milk at different lactation stages.
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JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Mingming Chu,Wenjing Sun,Songbing Yu,Yuanhang Li,Fangyu Zhu,Lijuan Yu,Yongyong Cao,Xuebo Cao,Yiming Li
Covalent organic frameworks (COFs) that incorporate heterocycles featuring multiple nitrogen atoms, such as triazine, bipyridine, and heptazine, are seen as promising heterogeneous photocatalysts for CO 2 photoreduction, while the substantial effect of N-atom relative locations in this transformation has rarely been systematically studied. Herein, a collection of isostructural porphyrin-based COF catalysts bearing bipheyl, 2–2′-bipyridine and 3–3′-bipyridine are judiciously designed for CO 2 photoreduction under simulated sunlight irradiation (1000 W/m 2 ). As results, comparing with the frequently used biphenyl and 2–2′-bipyridine unit, the porphyrin COF incorporating 3–3′-bipyridine yields a significant enhancement in photoelectric properties, and the CO production rate of 3–3′-Bpy-COF is 2 and 10 times higher than that of 2–2′-Bpy-COF and Bp-COF. Insights on the origin of the improved photocatalytic activity and reaction mechanism are further investigated, revealing above tiny variation of N sites results in a larger dipole moment for the 3–3′-Bpy-COF, facilitating the separation and transfer of photogenerated excitons. Moreover, The X-ray Photoelectron Spectroscopy (XPS) and Density Functional Theory (DFT) calculations reveal that the 3–3′-bipyridine N-atoms can strategically adjust the electron density surrounding the M−N4 active center of porphyrins, which stabilize the *COOH intermediate and reduce the energy barrier of the rate-determining step. This work highlights the collaborative influence of porphyrin and the steric location of N atoms within COFs photocatalysts for CO 2 reduction reaction, offering a new insight to design COFs endowed with exceptional capabilities for photocatalysis.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Haoran Liu,Rui Hou,Yilin Li,Junzhi Li,Guangshe Li,Zheng Lou,Dongdong Li,Wei Han
Antimony, as the anode of potassium ion batteries, has a satisfactory theoretical specific capacity (660 mAh g −1 ). However, the lattice expansion after potassization and insufficient conductivity of antimony hinder the practical application of Antimony based electrodes. A novel synthesis strategy for necklacelike biomass derived carbon fibers linked with MOF encapsulated Sb nanoparticles composite electrode is reported, wherein the unique structure of metal-organic frameworks (MOFs) is utilized to achieve nanoscale confinement and the inherent adsorption properties of fungi are exploited to construct conductive networks. The unique carbon encapsulation of MOF materials effectively controls the size of antimony particles and limits the expansion after potassization. The fixation of one-dimensional carbon fiber can prevent the powdering and shedding of the active materials and improve the cycle life of the composite electrodes. Electrochemical experiments and theoretical calculations show that NCFs@Sb@C anode has good conductivity and fast potassium ion diffusion kinetics. After 400 cycles at 1 A g −1 , NCFs@Sb@C still has a high reversible specific capacity of 129.3 mAh g −1 , which is significantly better than that of NCFs and Sb@C. In addition, the full cell of NCFs@Sb@C anode matched with PTCDA cathode exhibits good cycling stability, demonstrating the practical application potential of this composite electrode.
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MACROMOLECULAR BIOSCIENCE
·
2025
·
IF 4.1
Shijie Wang,Shanshan Xiao,Ning Li,Yue Xu,Ziyuan Song
Poly(ethylene glycol) (PEG)-polypeptide drug nanocarriers have garnered increasing attention during last decades. However, the tedious polymer synthesis and the stability issue greatly limit their further development. Herein the biphasic polymerization platform is reported for the easy access of a series of crosslinked PEG-polypeptide nanoparticles for enhanced drug loading and selective drug release. The accelerated polymerization allows for the preparation of a library of PEG-polypeptides from crude monomers with different polypeptide segments for structural optimization. Nanocarriers with redox-responsive de-crosslinking and enhanced drug loading are therefore obtained based on the model drug, doxorubicin, which exhibits selective killing of cancer cells. This study provides a synthetic method for efficient preparation of PEG-polypeptide nanocarriers, benefiting the downstream drug loading and therapeutic studies.
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POLYMER TESTING
·
2021
·
IF 4.282
Jing Zhang,Pai Peng,Lingdong Chen,Liping Zhao,Jie Feng
In recent years, hydrogels with antifouling properties and good biocompatibility have attracted great attention in bio-devices, but most of them are lack of eminent mechanical properties that limit their practical application greatly. In this work, a newly hybrid ion-covalent cross-linked double network (DN) hydrogels with excellent antifouling as well as mechanical properties were prepared by a simple one-pot method based on sodium alginate and a kind of antifouling material, N -hydroxyethyl acrylamide (HEAA). The DN hydrogel have excellent mechanical properties, including high tensile strength (1.32 MPa), high elastic modulus (0.31 MPa) and preeminent fatigue resistance. Besides, the DN hydrogel have good antifouling properties suggested by protein adsorption and cell adhesion experiments. In addition, they also exhibit highly in vitro compatibility. These properties make the DN hydrogels suitable for application in different fields, such as tissue scaffolds, implantable devices and so on.
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FOOD CHEMISTRY
·
2019
·
IF 5.399
Xiupei Yang,Jing Xu,Na Luo,Fenglin Tang,Maoxue Zhang,Bin Zhao
Chemical doping with heteroatoms was employed to prepare N,Cl co-doped fluorescent carbon dots (N,Cl-FCDs) which may be designed for the detection of tartrazine. Using urea as the N source and FeCl 3 · 6H 2 O as the Cl source, N,Cl-FCDs were synthesized by hydrothermal method with carbon dots prepared from aloe. Compared with pure carbon dots (CDs), N,Cl-FCDs resulted in dramatic improvement in the fluorescence properties and surface physical chemical properties. The fluorescence quantum yield of the N,Cl-FCDs was as high as 60.52%. As an effective fluorescence probe for tartrazine, a good linear relationship between N,Cl-FCDs and tartrazine was constructed at the concentration range from 0.1 to 30 μM with a detection limit of 48 nM based on the mechanism of fluorescence resonance energy transfer (FRET). The proposed fluorescent probe method was successfully applied to detect tartrazine in beverages, which is expected to have a potential application in the field of food analysis.
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Electrocatalysis
·
2017
·Vol. 9
·期 2
·264-270
·
IF 2.398
Zhang Lulu,Chen Yongting,Zhao Pingping,Luo Wei,Chen Shengli,Shao Minhua
One of the main challenges to generate hydrogen is to develop cheap and highly active electrocatalysts toward hydrogen evolution reaction (HER). Herein, Fe 3 C nanorods encapsulated in N-doped carbon nanotubes (Fe 3 C@NCNT) were synthesized by a simple method involving the pyrolysis of a Fe-based metal organic framework (MOF) and melamine. The hybrid composite showed an excellent catalytic activity toward HER in an acidic electrolyte. The overpotential at the current density of 10 mA cm −2 was only 154 mV in a 0.5 M H 2 SO 4 solution, which was lower than most of the non-precious metal and metal-free catalysts. Density functional theory (DFT) calculation results suggested that the synergistic effect between Fe 3 C nanorods and N dopants could effectively tune the H adsorption energy on carbon resulting in an enhanced HER activity.
Graphical Abstract
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ENZYME AND MICROBIAL TECHNOLOGY
·
2022
·
IF 3.705
Shi-Wei Zhao,Qian Zhou,Neng-Bing Long,Rui-Feng Zhang
A novel polymer support was prepared by curing of epoxy resin in ethanol solution in the macropores of a melamine sponge. The produced polymer gel could uniformly deposit on the surface of melamine in either porous or nonporous morphology. The composite sponge with porous coating can be used as a large-sized and well-mass transferred support for the immobilization of β-galactosidase from Bacillus circulans through method of adsorption and crosslinking, and a column reactor was made for the preparation of N-acetyllactosamine in a sealed circulation way. The porosity and specific surface area of the support were 91.6 % and 46 m 2 /g, respectively. The loading amount and the specific activity of immobilized β-galactosidase under the optimal immobilization conditions were 41.2 mg/g support and 16.5 U/mg protein , respectively. In the biosynthesis of N-acetyllactosamine lactose and N-acetylglucosamine were used as donor and acceptor, respectively. Under optimized conditions the N-acetyllactosamine yield reached 54 % within 150 min at 50 °C. After 10 cycles, the immobilized β-galactosidase retained 70 % of the original activity.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 2
·949-956
·
IF 1.134
Tang Ze-Hua,Xie Jin-Feng,Bian Zheng-Xu,Zhang Jun-Hao,Liu Yuan-Jun,Guo Xing-Mei,Kong Qing-Hong,Yuan Ai-Hua
To improve lithium storage performances of Si anode for lithium-ion batteries, Si nanoparticles encapsulated into porous N-doped carbon (Si@PNC) was devised and prepared by metal nitrate accelerated polymer blowing process. The Si@PNC composites have large specific surface area of 221.7
m2 g-1 and possess a great deal of mesopores and micropores, which are attributed to the carbonization of PVP and etching metallic nanoparticles. As anode for lithium ion battery, the initial discharge capacity of Si@PNC composites is high to 1626 mA h g-1,
and the specific capacity still retains 1030 mA h g-1 after 200 cycles at 200 mA g-1. Meanwhile, remarkably improved rate capability is achieved with an excellent reversible specific capacity of 375 mA h g-1 at 5.0 A g-1. The excellent lithium storage
performances benefit from the unique porous core–shell structure of Si@PNC composites, which improve electroconductivity, reduce volume dilatation and accelerate lithium ion transmission.
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Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 15
·9173-9182
·
IF 10.733
Ke Wang,Peter T. Clough,Pengfei Zhao,Edward J. Anthony
Calcium looping, a promising high-temperature CO2 capture technique, offers a mid-term economic solution to mitigate anthropogenic CO2 emissions. The main challenge in calcium looping is the synthesis of highly efficient CaO-based sorbents that can be used over many reaction cycles. Here, a sacrificial N-doped carbon nanosheet template was developed which produces MgO-stabilized CaO sorbents with fast adsorption rates, high capacities and remarkable long-term performance over many cycles. The characterization results show that such a template was formed through in situ pyrolysis of an organic acid and nitrates in a simple heating process in nitrogen. The presence of a carbonaceous template prevented crystallite growth, featured highly macroporous nanosheet (∼60 nm thick) morphologies, and ensured homogeneous mixing of Ca and Mg, which are essential to minimize diffusion limitations, mitigate sintering, and provide structural stability. Thus, 10 mol% MgO acting as an inert stabilizer was sufficient to achieve a CO2 uptake of 0.65 g g−1 (corresponding to a capacity retention of 89.9%) after 10 cycles under realistic conditions, as confirmed by TGA analysis. This N-doped carbon template can be applied generally to produce a wide range of porous and nanostructured stabilized CaO sorbents with stable CO2 uptake.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xianyi Tang,Cheng Tong,Lianqiao Tan,Zidong Wei,Meng Wang
Lithium-Sulfur Batteries (LiSBs) are prevented to apply in practice by the irreversible loss from the cathode and difficult conversation kinetics of lithium polysulfides (LiPSs). An ideal S host material should possess high conductivity and sufficiently dispersed catalytic active sites to precisely restore the dissolved LiPSs to the surface of the S host material. In traditional catalyst design, porous carbonaceous materials are often selected as carriers for the nano-catalytic activity sites. However, non-polar pure carbon interfaces, where without nano-catalytic activity sites covered, have a very weak affinity to LiPSs. Here, we use ammonia as a nitrogen source to anneal the reduced aerogel (graphene oxide (rGO) supported nano-TiO 2 ) at high temperatures. The N element is atomically doped into the lattice of the carbon matrix, and the nano-TiO 2 is converted to nano-TiN. A hierarchically porous and high conductivity TiN/N-C is prepared, in which the nano-TiN is well dispersed on the surface of N-doped rGO as an active center for catalyzing LiPSs conversion. The doped-N elements significantly increase the proportion of the polar surface. The S@TiN/N-C composite cathode delivered an excellent long-life cycling performance, and the reversible discharge specific capacity faded from 1224 ± 16 to 675 ± 31 mAh g −1 after 930 cycles. More importantly, after 150 cycles with a high S loading, a reversible areal capacity of 4.1 mAh cm −2 can be achieved.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xu Tian,Lijia Yao,Xiuxiu Cui,Rongjun Zhao,Xuechun Xiao,Yude Wang
Fast and effective detection of harmful gases is crucial criterion for the current development of gas sensors. In this paper, a novel n-butanol gas sensor using Al-doped CdIn 2 O 4 nanofibers (ACO NFs) is synthesized by an electrospinning method . The different morphologies of the as-prepared ACO NFs are controlled by doping different Al contents . Systematic characterizations demonstrate that the doping of Al to CdIn 2 O 4 NFs would enhance the reaction activities between the gas and sensing materials, such as generating large amounts of adsorbed oxygen and improving the specific surface area of sensing materials. The results show that the detection limit of all prepared sensors for n-butanol is sub-ppm, and less than 250 ppb. The optimal Al-doped CdIn 2 O 4 (5.0% Al/Cd molar ratio) based gas sensor results in 3.32-fold enhancement in gas response to 200 ppm n-butanol at an operating temperature of 300 °C and exhibits excellent long-term stability compared with the pure CdIn 2 O 4 . Hence, ACO NFs can be regarded as a promising sensing material for low-concentration n-butanol gas detecting. Also, the mechanisms for improving the sensing performance of ACO NFs based gas sensor are proposed.
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