Food Packaging and Shelf Life
·
2026
·
IF 10.8
Hongkai Xie,Yinlei Mao,Xinhao Wan,Hailu Liao,Chunhao An,Fengjiao Fan,Tao Zhang,Yinji Chen
Aggregated carbon dots exhibit weak antibacterial and antioxidant activities, limiting their application in packaging systems. Metal doping is an effective strategy to enhance their performance. Herein, Na-doped rice bran carbon dots (Na-RBCDs) were synthesized hydrothermally from rice bran and NaOH. A pH-sensitive bilayer film was fabricated via layer-by-layer casting, comprising an outer gelatin layer containing Na-RBCDs and an inner chitosan layer loaded with shikonin for indication/sustained release. Optimal antioxidant and antibacterial activities of Na-RBCDs were achieved at a 10:1 rice bran/NaOH mass ratio, and they exhibited no cytotoxicity toward HaCaT cells below 2 mg/mL. Scanning electron microscopy confirmed their uniform dispersion within the film matrix, ensuring a smooth surface and strong interlayer adhesion. Fourier transform infrared spectroscopy and thermogravimetric analysis indicated that Na-RBCDs formed hydrogen bonds with the polymer matrix, thereby improving the film’s thermal stability. Incorporating 5% Na-RBCDs enhanced UV-blocking ability, hydrophilicity (water contact angle >75°), and tensile strength (1.7-fold increase). The film demonstrated effective sustained release of both active components, alongside improved antioxidant, antibacterial, and pH-responsive colorimetric properties. When applied to refrigerated salmon, the film containing 5% Na-RBCDs extended the shelf life from 3 to 9 days by enhancing chemical and microbial stability. A pronounced color change was observed between days 9 and 12 (ΔE from 15.7 to 30.6), demonstrating its ability to monitor salmon freshness. This gelatin/chitosan-based intelligent active packaging system shows promising applicability for muscle food preservation and freshness monitoring. Further research is needed to establish a precise correlation between colorimetric response and specific spoilage indicators.
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DOI
高影响因子
Advanced Science
·
2020
·Vol. 7
·期 18
·1903045
·
IF 15.84
Zhe Cui,Shu-Ang He,Qian Liu,Guoqiang Guan,Wenlong Zhang,Chaoting Xu,Jinqi Zhu,Ping Feng,Junqing Hu,Rujia Zou,Meifang Zhu
SnS, is a promising anode material for lithium ion batteries (LIBs) and sodium ion batteries (SIBs), however, undergoes poor cyclic lifespan due to its huge volume changes and bad electroconductivity. Here, a modified CVD method is used to directly grow graphene-like carbon film on the surface of SnS nanosheet arrays which are supported by Co-, N-modified porous carbon fibers (CCF@SnS@G). In the strategy, the SnS nanosheet arrays confined into the integrated carbon matrix containing porous carbon fibers and graphene-like carbon film, perform a greatly improved electrochemical performance. In situ TEM experiments reveal that the vertical graphene-like carbon film can not only protect the SnS nanosheet from destruction well and enhance the conductivity, but also transforms SnS nanosheet into ultrafine nanoparticles to promote the electrochemical kinetics. Systematic electrochemical investigations exhibit that the CCF@SnS@G electrode delivers a stable reversible capacity of 529 mAh g −1 at a high current density of 5 A g −1 for LIBs and 541.4 mAh g −1 at 2 A g −1 for SIBs, suggesting its good potential for anode electrodes.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 33
·11555-11561
·
IF 4.39
Jinhui Wang,Xinyuan Zhang,Fei Liang,Zhanggui Hu,Yicheng Wu
Birefringent crystals with strong anisotropy are important components in modern optical devices. The newly discovered planar π-conjugated cyanurate group (HxC3N3O3)x−3 (x = 0–3) has been demonstrated as an effective functional motif for improving birefringence in the ultraviolet region. Here, single co-crystals of alkali halide cyanurates, RbBr·(H3C3N3O3) (I), RbI·(H3C3N3O3) (II), and CsBr·(H3C3N3O3) (III) were synthesized by the ethanol solution method, and NaBr·(H3C3N3O3) (IV) was obtained via the solvent-drop grinding method. These four co-crystals feature a planar (H3C3N3O3) arrangement and exhibit wide band gaps (> 4.90 eV), tunable birefringence (Δnexp ∼ 0.124–0.256), and high thermal stability (156 °C–349 °C). In addition, first principles calculations were also carried out to evaluate the relationship between molecule density, spatial arrangement and optical birefringence, and suggested a great tailoring effect of the alkali metal and halogen species on regulating the optical anisotropy of co-crystal cyanurates.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Dong Yi,Jiawei Fu,Fenzhong Long,Jin Han,Fangui Meng,Xinmin Zhang
To improve the quality of white LED and develop plant growth lighting, considerable efforts have been devoted to investigating red phosphor. Eu 3+ -activated phosphors are well-known red-emitting components due to their 5 D 0 - 7 F 1,2 transitions in various applications. It is also found that its 5 D 0 - 7 F 4 transition in the range of far-red wavelengths has potential applications in the fields of daily and agricultural lighting. In this study, two kinds of Eu 3+ -doped layered perovskite La 2 Ti 2 O 7 and A 2 La 2 Ti 3 O 10 (A = Li, Na, K) phosphors were synthesized by the solid-state method. The crystal structure, absorption, excitation, and emission spectra of all the samples were investigated in detail. Dissimilar luminescent behaviors of the studied samples were observed. Due to the different crystal structure and chemical composition of the host matrix, each compound exhibits a different emission spectrum. Specifically, Eu 3+ occupies a lower symmetric La 3+ site in A 2 La 2 Ti 3 O 10 (A = Li, Na, K) phosphors, resulting in an intense 5 D 0 - 7 F 4 far-red emission, while in La 2 Ti 2 O 7 :Eu 3+ , Eu 3+ gives a weak 5 D 0 - 7 F 4 emission. To the best of our knowledge, this is the first report that Eu 3+ exhibits a strong 5 D 0 - 7 F 4 far-red emission in the titanate host lattices with perovskite structure. Besides, A 2 La 2 Ti 3 O 10 :Eu 3+ (A = Li, Na, K) phosphors achieve higher photoluminescence efficiency than La 2 Ti 2 O 7 :Eu 3+ . Among them, the internal quantum efficiency of the optimized Li 2 La 2 Ti 3 O 10 :1.2Eu 3+ is about 84.7 %, and it has a better thermal stability (80 % at 125 °C). Furthermore, good photoelectric performances of red/white-LEDs fabricated by utilizing the representative Li 2 La 2 Ti 3 O 10 :1.2Eu 3+ as red/far-red components indicate that it has potential applications in indoor/outdoor lighting and plant growth lighting. This study provides a feasible way for developing efficient Eu 3+ -activated far-red optical materials.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Longde Jiang,Jingde Luan,Yu Zhang,Qingyu Chi,Wengang Liu,Zheng Yan,Shaobai Li,Chen Zhao
Phosphorus-oxygen co-doped graphite carbon nitride (POx-CN) are successfully fabricated by in situ impregnation and two-stage thermal polycondensation to investigate the effect of Na + and Cl - on the photocatalytic hydrogen evolution from artificial seawater splitting. The as-prepared POx-CN exhibits a hydrogen evolution rate of 1054.29 μmolg −1 h −1 in artificial seawater , lower than fresh water , indicating that Na + and Cl - play an inhibitory effect on hydrogen evolution reaction . The theoretical calculation indicates that the phosphorus-oxygen binary doping changed the electrostatic potential of the modified layer in carbon nitride molecule, accelerating the electron transfer rate from the structural O in triazine ring to P-N bond. In artificial seawater, the competition between Na + and Pt 2+ at active sites in the modified layer and electron capture by Cl - in the mutual conversion of Cl - and chlorine radicals result in the reduction of hydrogen evolution efficiency.
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产品关联
DOI
高影响因子
JOM
·
2024
·Vol. 76
·期 8
·4169-4178
·
IF 2.1
He Jie,Liu Jiaming,Yu Xiuyuan,Yang Chao,Liu Qingsheng
LiFePO 4 has become a mainstream cathode material, owing to its good safety and low price. However, its intrinsic limitations in terms of electronic and ionic conductivities hinder its further advancements. To overcome this challenge, element doping has been explored to enhance its conductivity. Here, Na and F co-doped LiFePO 4 /C was successfully synthesized via a carbothermic method. Structural characterization techniques were employed to confirm the formation of Li 0.97 Na 0.03 FePO 3.97 F 0.03 with controllable particle sizes. The incorporation of Na and F ions into the LiFePO 4 lattice results in a reduction of the Li-O bond energy. This decrease in bond energy facilitates the extraction and insertion of lithium ions during the charge and discharge processes, subsequently improving the overall kinetics of lithium-ion diffusion. Simultaneously, lattice distortion induced by doping led to charge compensation and accelerated Li + migration. Benefiting from the enhancement of intrinsic conductivity and Li + diffusivity, the specific capacitance of the co-doped LiFePO 4 /C cathode material was found to be 160 and 110 mAh g −1 at 0.1 and 5 C, respectively. Further, density functional theory calculations showed that Na/F co-doping enhanced the structural evolution in the material and increased free carrier concentration in LiFePO 4 . This work demonstrates that synergistic Na and F co-doping can optimize the rate performance of LiFePO 4 by enhancing intrinsic conductivity and Li + diffusivity, suggesting promising applications of the co-doped LiFePO 4 /C in high-power lithium-ion batteries for electric vehicles and grid-level energy storage systems.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ce Li,Xu Zhang,V.C. Onah,Weiling Yang,Zhuang Leng,Xiliang Jiang,Fangming Zhang,Shasha Li,Yong Zhang,Yu Han,Huisheng Liu,Chun Li,Dingfu Zhou,Fanming Zeng
In analyzing the effect of alkali metal and alkaline earth metal oxide on the properties of tellurite glass , a series of tellurite glass samples doped with alkali metals and alkaline earth metals were prepared based on the TeO 2 -WO 3 -GdF 3 glass system by melt quenching method. Through tests and comprehensive analysis, the results show that after the F − ions successfully enter the glass network, the substitution of TeO 2 by alkali and alkaline earth metals could reduce the molar volume , which means the glass becomes more compacted. The influence on the glass network is mainly shown in [TeO 3 ] and [TeO 4 ] units. Alkali metals and alkaline earth metals could increase the asymmetry of the TWG: Eu 3+ glass network, shorten the critical distance, and increase luminescence intensity by 8.6 times and improve color purity to 94%. In addition, alkali metals could prolong the fluorescence lifetime , while alkaline earth metals could shorten it. Te 4+
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DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 19
·2000684
·
IF 4.948
Wenyan Chen,Donghui Xu,Yuancheng Chen,Tang Tang,Shaojie Kuang,Haikuo Fu,Wuyi Zhou,Xiaoyuan Yu
Using polyvinyl alcohol and N-rich polyacrylonitrile as carbon sources, uniform MFe 1– x Mn x PO 4 (M = Li, Na)/N-doped C nanofibers are synthesized by sol–gel pretreatment and an electrospinning method followed by calcination. The as-prepared nanofibers exhibit a 3D homogenous network with uniform distribution of MFe 1− x Mn x PO 4 nanoparticles. The lattice distorts after Mn-doping without altering the original crystalline structure, increasing conductivity and enhancing the efficiency of Li + /Na + diffusion. When applied for lithium ion batteries, the optimized LiFe 0.8 Mn 0.2 PO 4 /C nanofibers deliver a considerable initial capacity of 169.9 mAh g −1 with coulombic efficiency of 92.4%. It also displays the excellent cycling stability with reversible capacity of 160 mAh g −1 after 200 cycles at 0.1 C and high rate performances with the specific capacity of 93 mAh g −1 at 5 C. Furthermore, NaFe x Mn 1− x PO 4 /N-doped C nanofibers are also synthesized by the same method for sodium-ion batteries, which exhibit an initial capacity of 134 mAh g −1 and specific capacity of 106 mAh g −1 at 0.1 C and 90 mAh g −1 at 1 C after 200 cycles. Owing to the facile fabrication process, these nanofibers are promising cathodes for lithium/sodium ion batteries with excellent electrochemical performances.
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DOI
高影响因子
Small
·
2021
·Vol. 17
·期 46
·2101887
·
IF 13.281
Jian Feng,Shao-hua Luo,Sheng-xue Yan,Yang Zhan,Qing Wang,Ya-hui Zhang,Xin Liu,Long-jiao Chang
Transition-metal selenides (TMSs) have emerged as prospective anode materials for sodium ion batteries (SIBs), owing to their considerable theoretical capacity and intrinsic high electronic conductivity. Whereas, TMSs still suffer from poor rate capability and inferior cycling stability induced by sluggish kinetics and severe volume changes during de/sodiation processes. Herein, a hierarchical composite consisting of a zinc-cobalt bimetallic selenide yolk and nitrogen-doped double carbon shell (denoted as Zn Co Se@NDC) is engineered and fabricated successfully. The architecture of the as-fabricated material improves the Na-ion storage performance via increasing the electron transfer kinetics, accommodating volume expansion, and mitigating the generation of by-products. As expected, the Zn Co Se@NDC electrode delivers superior sodium storage performance with long cycling stability (344.5 mAh g −1 at 5.0 A g −1 over 2000 long-term cycles) and high-rate performance (319.2 mAh g −1 at 10.0 A g −1 ). Meanwhile, the NVP@C//Zn Co Se@NDC full SIB cells are constructed successfully, retaining 96.3% of its initial capacity at 0.5A g −1 after 200 loops. The outstanding electrochemical performance and the construction of hybrid SIBs will have far-reaching influences on the development of the various rechargeable batteries.
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DOI
PubMed
高影响因子
POLYHEDRON
·
2022
·
IF 2.975
Yan-Ling Deng,Wei Li,Chun-Yang Pan
Two new metal hybrid borates , Na[Ni(py) 2 ] 2 ·[(C 4 H 2 O 6 ) 2 B]·H 2 O (py = pyridine) ( 1 ) and [Cu(H 2 O) 2 (1-EI) 4 ]·[B 5 O 6 (OH) 4 ] 2 ·H 2 O (1-EI = 1-ethylimidazole) ( 2 ), have been successfully synthesized. 1 features an interesting structure based on mixed borate-tartrate motifs. Two tartrate anions are condensed with one BO 4 to form the hybrid anionic group [(C 4 H 2 O 6 ) 2 B] 5− . The structure of 2 is composed of [B 5 O 6 (OH) 4 ] − clusters and [Cu(H 2 O) 2 (1-EI) 4 ] 2+ complexes, which exhibits hydrogen-bonded network formed by [B 5 O 6 (OH) 4 ] − clusters. These compounds are further confirmed by FTIR, PXRD and UV–vis. In addition, the catalyst prepared from 2 shows excellent electrocatalytic oxygen reduction reaction (ORR) activity.
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DOI
高影响因子
危险品化学品经营许可证（带存储）