CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yongxin Qian,Yang Tao,Wang Li,You Li,Tian Xu,Jinian Hao,Qinghui Jiang,Yubo Luo,Junyou Yang
Electronic packaging materials with efficient heat dissipation and anti-electromagnetic-interference performance are highly desirable to realize the long-term stable operation of highly integrated electronic devices. Such combined functions of heat dissipation and anti-electromagnetic-interference are achieved here by filling 3D CNF@C-Ni network skeleton in epoxy resins (EP). The CNF@C-Ni is a carbon nanofibers network skeleton embedded with micron flower-like C-Ni particles and has been obtained by carbonizing nickel metal–organic frameworks (Ni-MOF) embellished bacterial cellulose. The 3D CNF@C-Ni network skeleton provides a highly efficient heat transfer channel for EP, rendering a high thermal conductivity of 0.5 W·m −1 K −1 at room temperature for the 5 wt% CNF@C-Ni filled EP, ~2.8 times higher than that of pristine EP. In addition, the flower-like C-Ni particles realize an optimization in the impedance matching of CNF@C-Ni/EP, enabling a high electromagnetic wave absorption performance in the wave-transparent epoxy resins. In particular, a lowest reflection loss value of −49.77 dB at 13.44 GHz with a maximum effective bandwidth of 5.44 GHz (from 12.08 to 17.52 GHz) has been achieved in the 5 wt% CNF@C-Ni filled epoxy resins with a thickness of 2.2 mm. Such a new dual-functionated epoxy resin with combined high electromagnetic wave absorption and thermal management performance shows great potential in manufacturing of highly integrated electronic devices.
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Journal of Functional Foods
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2021
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IF 4.451
Huan Liu,Xinyu Meng,Lei Li,Xueyi Hu,Yun Fang,Yongmei Xia
Vitamin C has often been applied in capsule due to its sensitivity to oxygen, and it is only stable at acidic conditions; although most encapsulation of vitamin C has been carried out in neutral environment. Herein, hybrid fatty acid vesicles were constructed from conjugated linoleic acid (CLA) and saturated fatty acids (SFA) to encapsulate vitamin C in aid of sodium dodecyl sulfate under acidic conditions, with significantly improved encapsulation efficiency and sustain release of VC. The CLA-SFA and the encapsulated VC synergistically presented dramatic higher antioxidant activity in positive relation with chain length of the SFA. The possible mechanism that the SFA improved encapsulation was proposed. The SFA made larger and thicker vesicles, and the enhancement was in positive relation with chain length of the SFA, although SFA slightly broadened the vesiculation pH windows towards alkaline direction. Meanwhile, the prepared hybrid fatty acid vesicles presented good stability at room temperature.
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Huawen Huang,Christian Atangana Etogo,Chen Chen,Ran Bi,Lei Zhang
Recently, potassium-ion batteries (PIBs) have been deemed to be a potential next-generation energy storage system for large-scale application because of the similar metal-ion storage mechanism as lithium-ion batteries and rich potassium resources. However, the large-sized potassium ion will cause sluggish reaction kinetics of K+ during charge/discharge processes, hindering the development of high-performance PIBs. In this work, copper sulfide embedded in three-dimensional ordered macroporous carbon framework (3DOM Cu9S5@C) was prepared through a sulfidation and subsequent ion exchange strategy with 3D ordered macropore Zn-based metal–organic frameworks as a precursor for an advanced PIBs anode. In particular, the interconnected 3D ordered macroporous structure can provide rapid transport channels for the large potassium ions and create a sufficient contact area for solid electrode materials and the liquid electrolyte, which is conducive to improve the ionic diffusion kinetics of batteries. Consequently, when the prepared 3DOM Cu9S5@C composite was used as a PIBs anode material, it shows a remarkable potassium storage rate capacity of 170 mA h g–1 at 2.0 A g–1 and an excellent cycling stability of 316 mA h g–1 at 100 mA g–1 after 200 cycles.
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International Journal of Biological Sciences
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2021
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IF 6.582
Deng-Pan Wu,Yan Zhou,Li-Xiang Hou,Xiao-Xiao Zhu,Wen Yi,Si-Man Yang,Tian-Yu Lin,Jin-Lan Huang,Bei Zhang,Xiao-Xing Yin
Tamoxifen (TAM) resistance has indicated a significant challenge during endocrine therapy for hormone-sensitive breast cancer. Thus, it is significant to elucidate the molecular events endowing TAM resistance to endocrine therapy. In this study, we found that epithelial-mesenchymal transition (EMT) was an important event to confer TAM resistance, and attenuating EMT by elevating connexin (Cx) 43 expression could reverse TAM resistance. Specifically, Cx43 overexpression improved TAM sensitivity, while Cx43 depletion facilitated TAM insensitivity by modulating EMT in T47D TAM-resistant and -sensitive cells, and transplanted xenografts. Importantly, we found a novel reciprocal regulation between Cx43 and c-Src/PI3K/Akt pathway contributing to EMT and TAM resistance in breast cancer. Moreover, we identified that Cx43 deficiency was significantly correlated with poor relapse-free survival in patients undergoing TAM treatment. Therefore, Cx43 represents a prognostic marker and an attractive target for breast cancer treatments. Therapeutic strategies designed to increase or maintain Cx43 function may be beneficial to overcome TAM resistance.
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PubMed
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Nano Energy
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2021
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IF 17.881
Zhenyu Xu,Fenghua Zhou,Huizhen Yan,Guorong Gao,Huijing Li,Rui Li,Tao Chen
Human-machine interaction is crucial for mobile communications, Internet of Things , intelligent medical care, and intelligent robots. There is an increasing interest to develop the next generation of flexible human-machine interactive devices based on stretchable ionic conductive polymer gels . However, due to the nature of polymer gels, the devices turn brittle and the ionic conductivity dramatically drops at subzero temperatures, thus restricted their applicable temperature range. Herein, anti-freezing organohydrogels consist of polyacrylamides/nano-clays networks absorbed with ethylene glycol (EG)/water were designed. The anti-freezing binary solution provides excellent properties for organohydrogels at − 30 °C, including tensile modulus of 29.2 kPa, an ultimate tensile strain of 700%, the ionic conductivity of 1.5 × 10 −3 S m −1 , transparency of 91%, and rapid self-healing. The flexible organohydrogels electrodes were assembled with elastomers to prepare triboelectric nanogenerators (TENGs), which were further attached on fingers to develop human-machine interactive keyboards. The voltage signals produced by the keyboards in contact with many surfaces were collected, coded, and interpreted as letters and punctuations, then displayed on a monitor. We demonstrated typing by using the self-powered flexible keyboard at − 30 °C. This work may benefit the development of anti-freezing soft materials, self-powered sensors, and wearable human-machine interaction communication device systems.
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LANGMUIR
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2019
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IF 3.683
Yongmin Huang,Xun Tang,Junmei Wang,Hualong Ma,Yingming Wang,Wei Liu,Gongwei Wang,Li Xiao,Juntao Lu,Lin Zhuang
The self-healing feature of gallium (Ga) is unique, making Ga-based materials attract attention for their potential to solve the anode pulverization issue of lithium ion batteries. In this work, a hierarchical two-dimensional (2D) Ga2O3/C structure has been synthesized by a facile NaCl template method. Ga2O3 nanoparticles (3.8 nm) are uniformly embedded in 2D carbon nanosheets. The long horizontal length of the carbon nanosheets (10 μm) provides long-range electron conductivity, and the thin vertical thickness (75 nm) shortens the Li ion diffusion path. Benefited from the integrated 2D structure and the high electron conductivity, the obtained 2D Ga2O3/C nanosheets exhibit excellent overall performance, including high lithium storage capacity (1026 mAh g–1 at 0.5 A g–1), high rate capability (378 mAh g–1 at 10.0 A g–1), and high cyclability (500 cycles at 0.5 A g–1). The lithiation/delithiation mechanism of 2D Ga2O3/C has been further studied with combined electrochemical and ex situ X-ray diffraction methods.
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PubMed
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CERAMICS INTERNATIONAL
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2019
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IF 3.45
Wenqi Yang,Fuxing Ye,Shuai Yan,Lei Guo
The corrosion of YSZ TBCs attacked by calcium–magnesium–aluminosilicate (CMAS) is a serious problem. Yttrium tantalite (YTaO 4 ), a new kind of potential thermal barrier ceramic material, was expected to replace the YSZ to manufacture the TBCs because of its great thermophysical characteristics. In this study, porous YTaO 4 ceramic pellets, instead of actual TBCs, were used to investigate the CMAS corrosion resistance at 1250 °C. Results indicated that CMAS couldn't cover the whole surface of YTaO 4 pellets homogeneously because of low wettability between liquid CMAS and YTaO 4 , in addition, there was almost no reaction layer after 4 h reaction. The XRD results showed that M-YTaO 4 , M′-YTaO 4 , Ca 2 Ta 2 O 7 and Y 2 Si 2 O 7 were the main four phases after reaction and there was no phase containing the elements of Mg and Al. Compared with YSZ TBCs, this new kind of potential thermal barrier ceramic material showed well resistance to CMAS corrosion.
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VACUUM
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2019
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IF 2.515
Kun Wang,Xiaobing Huang,Tao Zhou,Haiyan Wang,Huasheng Xie,Yurong Ren
Li 2 FeSiO 4 /C cathode composites were fabricated from a simple solid-state approach using precursor Fe-MOFs prepared by hydrothermal process. The Li 2 FeSiO 4 /C composites covered by carbon film with diverse contents were characterized using XRD , SEM , galvanostatic charge-discharge measurement and EIS, and so on. Results of the investigation prove that Li 2 FeSiO 4 /C composites with 19.3 wt % carbon layer present prominent electrochemical capability, which delivered the discharge capacity of 154, 138, 129, 117 and 100 mA h g −1 at 0.2, 0.5, 1, 2 and 5 C, respectively. After 100 cycles, discharge capacity retained 97.4% compared to the original value at 2 C. Furthermore, it possesses the lowest charge transfer resistance as well as the highest Li + diffusion coefficient , attributing to uniform carbon coating and porous structure for Li 2 FeSiO 4 /C composites.
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ELECTROCHIMICA ACTA
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2019
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IF 5.383
Mingyang Yang,Lujie Cao,Zhenyu Wang,Yuanju Qu,Chaoqun Shang,Hanyu Guo,Wei Xiong,Junjun Zhang,Run Shi,Jianli Zou,Chun Cheng,Hui Pan,Zhouguang Lu
A novel and highly active vanadium self-intercalated C/V 1.11 S 2 nanosheets with abundant active sites are fabricated by a simple hydrothermal-calcinations method. The structures and morphology of C/V 1.11 S 2 nanosheets were characterized by XRD, SEM, XPS and TEM. Particularly, PVP (polyvinylpyrrolidone) was used as surfactant to control the morphology of vanadium sulfide and carbon source to reduce the vanadium sulfide into vanadium self-intercalated V 1.11 S 2 phase with rich active sites. The C/V 1.11 S 2 nanosheets showed an excellent electrocatalytic activity for hydrogen evolution reaction, including a low onset potential of 15 mV vs. RHE (reversible hydrogen electrode), small Tafel slope of 51 mV dec −1 , as well as extraordinary catalytic stability. The first-principle calculations further confirmed that the V 1.11 S 2 has a much lower Gibbs free energy for hydrogen adsorption (ΔG H ) than that of VS 2 . The enhanced HER performance can be contributed to the unique vanadium self-intercalated structures, nanostructured morphology and rich sulfur defects of the obtained C/V 1.11 S 2 nanosheets. We believe that the C/V 1.11 S 2 can be used as electrocatalyst in chemical engineering industry and our method provides guidance on the fabrication of other defective transition-metal dichalcogenides to improve their catalytic performances.
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Molecular Medicine Reports
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2019
·Vol. 19
·期 5
·3658-3666
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IF 1.851
Jin Xu,Yin Ying,Gaoyun Xiong,Liqin Lai,Qingliang Wang,Yue Yang
Nasopharyngeal carcinoma (NPC) is a type of cancer originating in the nasopharynx. There are no NPC‑specific treatments available at present. Serpin peptidase inhibitor clade C member 1 (SERPINC1) serves roles in anticoagulation and anti‑inflammation. The aim of the present study was to investigate the role of SERPINC1 in the proliferation and apoptosis of NPC cells. Tumor and adjacent healthy tissue samples were collected from patients with NPC. Additionally, the SERPINC1 gene was silenced in the HNE3 cell line using short interfering RNA targeted against SERPINC1 (SERPINC1‑siRNA). Cell viability was determined via a Cell Counting Kit‑8 assay; furthermore, proliferation and apoptosis were investigated via flow cytometry. Western blotting and reverse transcription‑quantitative polymerase chain reaction analysis were performed to determine the expression levels of protein and mRNA. It was revealed that the expression levels of SERPINC1 mRNA and protein were increased in NPC tumor tissues compared with in adjacent healthy tissues. The expression of SERPINC1 mRNA and protein in HNE3 cells decreased following SERPINC1‑siRNA transfection. Furthermore, knockdown of SERPINC1 promoted apoptosis and inhibited proliferation. It was also demonstrated that silencing SERPINC1 upregulated the expression of B‑cell lymphoma-2 (Bcl‑2)‑associated X protein and p53 mRNA and protein, and downregulated that of Bcl‑2, survivin and cyclin D1. Downregulation of SERPINC1 reduced the phosphorylation of phosphatidylinositol 3‑kinase (PI3K), protein kinase B (Akt) and mammalian target of rapamycin (mTOR). Thus, SERPINC1 knockdown may promote the apoptosis of HNE3 cells and inhibit proliferation via the suppression of the PI3K/Akt/mTOR signaling pathway.
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Catalysts
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2019
·Vol. 9
·期 8
·648
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IF 3.444
Xiao-Qing Gong,Chuan-Wan Wei,Jia-Kun Xu,Xiao-Juan Wang,Shu-Qin Gao,Ying-Wu Lin
The encapsulated enzyme system by metal-organic frameworks (MOFs) exhibits great potential in biofuel cells, pharmaceuticals, and biocatalysis. However, the catalytic efficiency and the enzymatic activity are severely hampered due to enzyme leaching and deficiency of storage stability. In this study, we immobilized cytochromec(Cytc) into dimethylimidazole-copper (Cu(Im)2) by biomimetic mineralization, and constructed a bioinorganic hybrid material, termed Cytc@Cu(Im)2. Encapsulated Cytcin Cu(Im)2with a nanosheet structure exhibited significantly improved catalytic efficiency, enzymatic activity and kinetic performance. The catalytic efficiency (kcat/Km) for Cytc@Cu(Im)2was ~20-fold higher compared to that of free Cytc. Moreover, the increased activity was not affected by long-term storage. Based on this system, we further constructed a multi-enzyme composite with glucose-oxidase (GOx), termed GOx-Cytc@Cu(Im)2, which exhibited greatly improved enzymatic activity, stability, and excellent selectivity for the detection of low concentrations of glucose. This strategy may provide new insights into the design of enzymes with high activity and stability, as well as the construction of multi-enzyme systems.Keywords:enzymatic immobilization;biomimetic mineralization;multi-enzyme;bioinorganic hybrid material;biosensors
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JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Zhenglu Zhu,Kaikai Bai,Haibin Zuo,Enyu Ma,Zhiqiang Xu,Lincheng Liu
Rapid technological advancements and increasing demand for the efficient utilisation of global resources have promoted the design and development of sustainable anode materials to achieve batteries with high specific capacities and excellent rate capability for energy-storage devices. Herein, a high-performance MnO nitrogen-doped carbon anode material for lithium-ion battery based on coffee residues, potassium permanganate, and urea is presented. MnO and N are uniformly embedded inside the carbon material, connected by N–Mn bonds. The introduction of N not only hinders the aggregation of Mn nanoparticles generated during lithiation, but also enhances the electrochemical activity of carbon and improves the electrical conductivity for better reaction kinetics. These benefitting factors promote the high reversible specific capacity of 768 mA h g −1 at the current density of 0.3 A g −1 , as well as superior cyclic and stability performance. The demonstrated high-performance and low-cost anode material also provides a sustainable route for the high-value-added utilisation of waste biomass.
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