Journal of Energy Storage
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2023
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IF 9.4
Xin Xu,Shang Wu,Yang Liu,Chaoyang Liu,Xin Sun,Shuo Tian,Lan Wu,Yuzhi Sun,Zhichao Wang,Quanlu Yang
The tubular microsphere structure is an effective structure for asymmetric supercapacitors due to its high specific surface area and porosity. It can slow down the volume shrinkage caused by redox process. In this paper, tubular-like NiMoO 4 ·xH 2 O microspheres were designed to reach a high specific capacity. The NiMoO 4 ·xH 2 O was prepared by hydrothermal method and subsequent annealing treatment showed a tubular microsphere structure with many particles uniformly distributed. And its specific capacity is 943 F g −1 at 1 A·g −1 and capacity retention is 73.4 % after 3000 cycles. The Bi 2 S 3 /C was selected as negative material to build an asymmetric supercapacitor (battery-type device). It exhibited an impressive specific capacity (419 F g −1 at 1 A g −1 ). It was worth noting that the battery-type devices built with NiMoO 4 ·xH 2 O and Bi 2 S 3 /C can achieve a specific energy of 27.1 Wh kg −1 at 2456.9 W kg −1 and capacity retention of 69.2 % after 5000 cycles. It was shown that NiMoO 4 -xH 2 O and Bi 2 S 3 /C as electrode materials have great potential and can enhance the energy storage application of supercapacitors.
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CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yufen Li,Ruijie Wang,Shouzheng Jiao,Hua Lai,Yuyan Liu,Zhongjun Cheng
Surfaces with switchable adhesion have been vigorously investigated over the past decades by mimicking the unique adhesive mechanisms of living systems. However, designing a universal intelligent adhesive surface for both solid and liquid remains a challenge. Herein, drawing inspiration from the controllable capillary forces generated by muscle movements and oil-secretion on the foot pads of the beetle ( Hemisphaerota cyanea ), we report a novel oil-loaded shape memory polymer (SMP) micropillars with such smart controllability. Based on the shape memory effect (SME) of the SMP, the pillars can be reversibly switched between the tilted state and the upright state, which simultaneously changes the distribution of the trapped oil, and thus generates different capillary forces. This variation results in reversible adhesion behaviors of the surface to diverse solids including flat glass, CD disk, polytetrafluoroethylene (PTFE), rough glass, sandpaper, nylon net, and liquid droplets like acid, basic, salt-containing water droplets, and some organic liquids such as glycol, glycerol, and formamide. Given its smart adhesion, the surface was further applied in in-situ gripping/release of solid objects and directed liquid shedding. This work provides a new design strategy for smart adhesive materials, which may contribute to the development of smart grippers, microfluidics, etc.
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Food Packaging and Shelf Life
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2023
·
IF 8
Yitong Dong,Zhilu Rao,Yanchun Liu,Xuejing Zheng,Keyong Tang,Jie Liu
An edible film based on soluble soybean polysaccharide (SSPS) and gelatin incorporating curcumin was fabricated as active packaging material for soybean oil . The effect of curcumin (Cur) on structural and physical properties of SSPS/gelatin films were investigated. Scanning electron microscopy revealed that curcumin was evenly distributed in the SSPS/gelatin matrix. Hydrogen bonding interactions between SSPS/gelatin and curcumin were unveiled by Fourier-transform infrared spectroscopy. The addition of curcumin (0 −0.20 %) significantly increased the tensile strength , temperature of maximum mass loss rate, yellow index, transparency value and water contact angle from 2.3 to 5.5 MPa, 249–252 °C, 2.04–183.07, 0.51–1.63, and 70.7–98.6°, respectively. The DPPH and ABTS radical scavenging activities of the SSPS/gelatin film containing 0.20% curcumin were 42.6 % and 99.6 %, respectively, which were remarkably higher than those of neat SSPS/gelatin film. The SSPS/gelatin/Cur composite films showed antibacterial activity against Escherichia coli and Staphylococcus aureus . The heat-sealed SSPS/gelatin/Cur pouch of soybean oil showed quick-dissolving property upon contact with hot water. Moreover, peroxide value results indicated that the SSPS/gelatin/Cur pouch could effectively delay the soybean oil oxidation under accelerated storage conditions. Therefore, the SSPS/gelatin/Cur composite films may be served as active packaging materials for edible oils .
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Chuhan Zhang,Qingli Sui,Lin Lu,Yongjin Zou,Fen Xu,Lixian Sun,Dan Cai,Cuili Xiang
This paper presents CuCo 2 O 4 @MoNi-layered double hydroxides (CuCo 2 O 4 @MoNi-LDH) core–shell assemblies synthesized successfully by a stepwise process using hydrothermal and calcination methods. The morphology of a core–shell structure consisting of nanosheets grown uniformly on the surface of the hollow spheres was realized. The results showed that CuCo 2 O 4 @MoNi-LDH hollow spherical nano-sheets are an excellent choice for applications that require outstanding structural stability and a high specific surface area. A specific capacitance of 1286 F g −1 was obtained at a current density of 1 A g −1 , which indicates its promising application in supercapacitors . Furthermore, asymmetric supercapacitors assembled using CuCo 2 O 4 @MoNi-LDH positive electrodes achieved an ultra-high strength density of 68.1 Wh kg −1 at an energy density of 795.9 W kg −1 with an excellent cycling stability (i.e., the capacitance retention rate of 88 % after 6000 cycles). According to these findings, CuCo 2 O 4 @MoNi-LDH is a strong contender for power storage applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Feng Wang,Chao Li,Haohao Wang,Lu Yu,Fuming Zhang,Robert J. Linhardt
Natural amino acid polymers have been wide-used as bio-compatible emulsion stabilizers . In this study, Amphiphilic O(Phe- r -Glu)s were synthesized through the papain-catalyzed random polymerization of L -phenylalanine and L -glutamate with the major degree of polymerization value of 6–7. The polymerization yield was increased by more than 35 % using choline to reduce the energy barrier for the amino substrates to form the tetrahedral intermediate with the catalytic triad. The squalene/water emulsions stabilized by O(Phe- r -Glu) nanoparticles were pH-insensitive at pH 1–12. The investigation of mechanism found the combined effects of steric hindrance , electrostatic repulsion and the viscosity of the emulsion contributed to the stability of the emulsion droplets. Under acidic condition, the layers of O(Pho- r -Glu)s particle aggregates formed around the emulsion droplets and the higher viscosity of emulsion mainly contributed to the stability of emulsions . At basic condition, the strong electrostatic repulsion between emulsion droplets covered by the negatively charged O(Pho- r -Glu) particles and the steric hindrance contributed mainly to the prevention of the coalescence of emulsion droplets. The application of enzymatically synthesized amphiphilic peptides in emulsion, along with tunable performance through the polymerization of amino substrates, is in line with the sustainable development requirements in fields such as pharmaceuticals, food and cosmetics.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Canyu Cui,Wenwen Wang,Xinyan Lv,Shihui Jiao,Guangsheng Pang
The cobalt carbonate hydroxide one-dimensional (1D) needle-like nanostructure is grown on the non-woven fabric via hydrothermal method . The 1D interlaced needle-like structure not only reduces the pore size of the non-woven fabric but also provides rough micro-nano structure of the superhydrophilic cobalt carbonate hydroxide/non-woven fabric, which is endowed with superhydrophobicity by coating with polydimethylsiloxane (PDMS). The resulting superwetting non-woven fabrics exhibit high separation efficiency for a series of surfactant-stabilized organic solvent/water emulsions (more than 99.3% for both W/O and O/W emulsions) and preferable recyclability (more than 10 cycles). The fluxes for all W/O and O/W emulsions are above 300 L m −2 h −1 . Meanwhile the superhydrophobic fabric exhibits outstanding chemical stability in acid, alkaline and salt solution, and good mechanical durability after abrasion test with sandpaper. The comprehensive performances of the superwetting fabrics based on 1D nanostructure make them possible to be promising material for the separation of organic solvent/water mixtures in polluted water in harsh environments.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Menghe Jiang,Ying Wang,Cuili Xiang,Yongjin Zou,Fen Xu,Lixian Sun,Dan Cai,Chua Yong Shen
Supercapacitors are promising environmentally friendly energy storage devices owing to their high-power density, fast charge and discharge rates, long service life, wide applicable temperature range, and green environmental protection. Electrodes largely determine superconductor performance, so it is crucial to develop electrode materials with excellent performance. In this work, Mn x Co y O 4 @MoS 2 composites were obtained by coating flake MoS 2 arrays on spherical Mn x Co y O 4 using hydrothermal and heat treatment methods. At x/y = 1:2, the Mn x Co y O 4 @MoS 2 electrode material exhibited a specific capacitance of 1422 F g −1 at 1 A g −1 , which was higher than that at x/y = 1:1 and 2:1. When assembled into an aqueous asymmetric supercapacitor , the proposed electrode material provided a specific capacitance of 131 F g −1 at 1 A g −1 . The promising cycle life of the electrode material was further illustrated by the fact that capacity retention of 85% was obtained after 5000 cycles, and the device retained a specific power of 794 W kg −1 with 46.58 Wh kg −1 . The proposed electrode material design, therefore, provides new ideas to be used in the development of advanced electrodes.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 3
·1174-1185
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IF 3.925
Xinyu Liu,Jing Xu,Jiandong Wu,Zhenlu Liu,Shengming Xu
In the process of photocatalysis, semiconductor materials generate photogenerated electrons and photogenerated holes when excited by sunlight, so as to participate in the process of photocatalytic decomposition of water to produce hydrogen. In this work, under the combined action of ultrasonic and electrostatic forces, two semiconductors are successfully coupled through electrostatic self-assembly to effectively avoid the serious phenomenon of sulfide photocorrosion. Through electrochemical and fluorescence characterization experiments, it is confirmed that ZnCo2O4/CdS can accelerate the generation and transmission rates of photogenerated carriers. ZnCo2O4/CdS greatly increased the activity of the catalyst under simulated sunlight irradiation. With good photocatalytic activity, the hydrogen yield reached 80.71 mmol g−1 within 5 hours, far superior to those of Co3O4/CdS and ZnO/CdS. The relative values of the work functions of ZnCo2O4(311) and CdS(110) were calculated by DFT. Combined with the position of the conduction band, it was concluded that a new S-scheme induced by an internal electric field was formed at the ZCO/CS-25% contact interface, thus improving the photocatalytic activity.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Changyuan Song,Yin Jin,Xiangyi Gu,Jianwei Shi
Solar-heated absorption has become an effective technique to handle the crisis of crude oil spill. Although photothermal absorbents could efficiently clean up crude oil in situ, oil recovery methods such as squeezing absorbents have a negative impact on structural integrity and performance of absorbents, shortening the service life of the device. Herein, a solar-driven carbon-doped self-repairing polyurethane sponge (CSPU) is fabricated for absorption and recovery of crude oil. Chitosan-derived N-doped porous carbon (NPC) as photothermal filler and 2-hydroxyethyl disulfide (HDES) as chain extender are introduced into sponge in situ through free foaming. The firm load of NPC endows CSPU with good light absorption of 97.1% and a stable photothermal conversion performance. Additionally, the solar-driven self-repairing property promotes CSPU to timely repair the structural damage caused in oil recovery process. Consequently, CSPU exhibits a high crude oil absorption of 23.5 g/g, and it still maintains a good oil absorption and recovery efficiency after friction, ultrasonic treatment or multiple absorption-recovery cycles. This strategy combining photothermal oil absorption and solar-driven self-repairing provides a sustainable and durable solution for addressing crude oil spills.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 45
·21009-21019
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IF 4.682
Lin Lingyin,Zhou Yanfang,Chen Piaoyi,Xiao Qinglin,Ye Guodong
Transcatheter arterial embolization is an established treatment for hepatocellular carcinoma (HCC). However, the existing embolic materials still have some shortcomings, e.g., particle clumping can cause catheter occlusion. In this study, after the synthesis of monomer glyceryl triallyl ether monomer (GE), amorphous embolic agent (PGE) was synthesized by photopolymerization in the presence of GE and photoinitiator. Combined with RT-IR, TG and GPC, we verified that the polymerization followed a photo-driven radical-mediated [3 + 2] cyclopolymerization mechanism (PRMC) through experimental and modeled NMR. The macromolecular properties such as polymerization profile and morphology were studied by TG and SEM–EDS. Finally, the degradation, swelling and migration behavior of PGE were characterized, which indicated that PGE could embolize HCC by blocking the blood supply. In this study, PRMC prevented GE polymerization from degradative chain transfer with 70% yield in an hour, and 200–350 µm PGE was synthesized using this mechanism suitable for clinical use. Graphical abstract
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Small
·
2022
·Vol. 19
·期 6
·2206323
·
IF 15.153
Tianbao Zhao,Zirui Jia,Yan Zhang,Guanglei Wu
In order to achieve excellent electromagnetic wave (EMW) absorption properties, the microstructure design and component control of the absorber are critical. In this study, three different structures made of Mo 2 C/C hollow spheres are prepared and their microwave absorption behavior is investigated. The Mo 2 C/C double-shell hollow spheres consisting of an outer thin shell and an inner rough thick shell with multiple EMW loss mechanisms exhibit good microwave absorption properties. In order to further improve the microwave absorption properties, MoC 1-x /C double-shell hollow spheres with different crystalline phases of molybdenum carbide are prepared to further optimize the EMW loss capability of the materials. Finally, MoC 1-x /C double-shell hollow spheres with α-phase molybdenum carbide have the best microwave absorption properties. When the filling is 20 wt.%, the minimum reflection loss at 1.8 mm is −50.55 dB and the effective absorption bandwidth at 2 mm is 5.36 GHz, which is expected to be a microwave absorber with the characteristics of “thin, light, wide, and strong”.
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PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Danmin Yang,Qun Liu,Yahui Gao,Shoumei Wan,Fanrong Meng,Wuyin Weng,Yucang Zhang
Sliver nanoparticles (AgNPs) were loaded on chitosan (CS) and incorporated into polyvinyl alcohol (PVA) to develop novel active food packaging films. AgNPs were fabricated by liquid phase chemical reduction method using CS and sodium citrate friendly reductant of AgNO 3 . The silver we prepared was found to be nanoscale by transmission electron microscopy (TEM) and AgNPs were homogeneously dispersed in the matrix by scanning electron microscopy (SEM). The composite film exhibited excellence mechanical properties with tensile strength of 49.97 MPa and elongation at break of 275.90%. When the concentration of AgNPs was 0.019% (w/w), the diameter of filter paper was 5.00 mm and the inhibition zone against Escherichia coli reached 16.07 mm at 37 °C for 8 h. The water vapor permeability and water solubility of the Ag@CS/PVA films decreased with the incorporation of AgNPs, and this was beneficial for food preservation. Especially, Ag@CS/PVA films could reduce the weight loss of strawberries and avoid microbial infection at 25 ± 1 °C and 50 ± 5% RH. Benefiting for good mechanical properties, antibacterial property, flexibility and high transparency, Ag@CS/PVA films showed its great potential in fruit storage and transportation application.
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