ACS Applied Energy Materials
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2023
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IF 6.4
Xin Gao,Ting Wang,Kai Sun,Yujun Fu,Ying Wu,Dequan Liu,Deyan He
The establishment of three-dimensional structures, carbon coating, and proper defects is an effective strategy to improve electrochemical performance of molybdenum sulfide. In this work, carbon-coated MoS2-ZnS (MoS2-ZnS@C) heterostructures were constructed by treating the MOF precursor with a one-step sulfurization/carbonization strategy. The MoS2-ZnS@C heterostructures not only introduce abundant C–S–C and C–N bonds which contribute to ion storage with enhancive active sites but also effectively accelerate ion diffusion and reaction kinetics. The corresponding reaction mechanism was revealed via XRD and HR-TEM tests. The anode of MoS2-ZnS@C heterostructures shows outstanding rate capability (309 mAh g–1 at 10 A g–1) and long cycle stability (343 mAh g–1 after 1200 cycles at 5 A g–1) in sodium-ion batteries (SIBs). Meantime, the MoS2-ZnS@C heterostructure anode also exhibits enhanced potassium storage performances, delivering a superior rate capability (80 mAh g–1 at 5 A g–1) and superior long cycle performance (297 mAh g–1 after 100 cycles at 0.5 A g–1). In addition, a high specific capacity of 270 mAh g–1 is achieved at 1 A g–1 in a full cell made up of MoS2-ZnS@C/ether-based electrolyte/Na3V2(PO4)3. The construction of heterostructures for improving the electrochemical performance can also be applicable to other battery material fields.
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CHEMOSPHERE
·
2023
·
IF 8.8
Hang Lv,Yuandong Huo,Manlu Cheng,Zenghui Diao,Gang Song,Diyun Chen,Lingjun Kong
A kind of high yield and recyclable Cobalt–Carbon composite (Zn 1 Co 5 /P n C) was prepared by carbothermal reduction process, in which the cobalt acetate and zinc acetate were considered as Zn and Co precursors, and the polyester waste was evolved as the carbon precursor. The morphology, structure and composition of the composite were characterized using scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Results showed that evaporation of zinc contributed to the formation of porous carbon structure, and the Co nanoparticles were wrapped and protected by the porous carbon matrix. The Zn 1 Co 5 /P n C activated peroxymonosulfate (PMS) system (Zn 1 Co 5 /P n C/PMS) was constructed to degrade the levofloxacin (LEV). The activity and mechanism of LEV degradation was understood. The LEV degradation efficiency was high to 96.60% within 90 min in the presence of Zn 1 Co 5 /P 4 C. Moreover, the Zn 1 Co 5 /P 4 C still maintained favorable PMS activation performance after five-cycle runs. The results show that the Zn 1 Co 5 /P 4 C played positive role in activating the PMS, it may be due to the facts that the polyester derived carbon could supported the Co while the evaporated Zn could increase the surface area of Zn 1 Co 5 /P 4 C, leading to the increased activity. The possible degradation pathways were proposed by identifying the intermediate products through liquid chromatography-mass spectrometry analysis. This study put forward a promising method to use polyester waste to synthesize high yield cobalt-carbon composite for degrading the antibiotic in wastewater.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Kai Xia,Rui Liang,Yi Luo,Anqiao Zheng,Guodong Jiang,Mingxia Fan,Jian Xiong,Songdong Yuan
A series of LiFe 0.7 Mn 0.3−x Mg x PO 4 /C (x = 0, 0.02, 0.05, and 0.08) cathode materials were synthesized by a high-temperature solid-phase method and characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and electrochemical tests to determine the structural, morphological, and electrochemical properties of the synthesized materials. The experimental results showed that the small amount of Mg 2+ doping not only had no effect on the crystalline structure of the material but also significantly improved the electrochemical properties of the material. The LiFe 0.7 Mn 0.25 Mg 0.05 PO 4 /C material achieved specific discharge capacities of 163.2, 155.2, 149.1, and 142.0 mAh/g at 0.1C, 0.2C, 0.5C, and 1C, respectively, and a capacity retention rate of 98.6% after 50 cycles at 0.1C. It exhibited excellent rate performances and cycling stability. Electrochemical alternating-current impedance showed that the lithium-ion diffusion coefficient of the LiFe 0.7 Mn 0.25 Mg 0.05 PO 4 /C sample reached 1.19 × 10 −13 cm 2 /s, which was 4.1 times higher than that of the pre-modified sample. Combined with the cyclic voltammetry test results, it was found that the appropriate amount of Mg 2+ doping could reduce the impedance and polarization of the material as well as increase the conductivity and the lithium-ion diffusion rate, ultimately improving the electrochemical properties.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Qing Zhu,Jinxin Wu,Rui Tong,Wenhao Li,Xiuli Hu,Ningchen Tian,Liqing He,Yanwei Li,Zhenyu Wang
Na 4 MnCr(PO 4 ) 3 (NMCP) has been considered as one kind of privileged cathodes with high energy density for sodium ion batteries (SIBs) due to three-electron redox reaction during the insertion/extraction process. Nevertheless, its practical use is restricted by its low intrinsic conductivity and serious Jahn-Teller distortions. Herein, a facile doping strategy was presented to address the above issues, and the effects of different kinds and quantities of transition metal dopants on electrochemical performance of NMCP were systemically studied. The results reveal that Ni50-NMCP/C has the most effective doping composition, showing a discharge capacity of 143.0 mAh g −1 at 50 mA g −1 and long-term cyclic stability with capacity retention of 55.7 % at 1000 mA g −1 over 500 cycles, higher than those of the pristine NMCP (106.6 mAh g −1 at 50 mA g −1 and 38.8 % capacity retention at 1000 mA g −1 ). The substitution of Ni 2+ for Mn 2+ promotes electron conductivity and structural stability, rendering improved electrochemical performance. Moreover, the promising electrochemical performance of Ni50-NMCP/C//HC full cell demonstrates the anode's potential for use. This study indicates a quick way to understand the effects of elemental doping on NMCP and explore novel high energy and high stability cathodes for SIBs.
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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 27
·14674-14681
·
IF 11.9
Huaikun Zhang,Wentao Wang,Zechuan Dai,Yin Zhu,Mingyu Cheng,Bocheng Zhang,Yafei Feng,Yangyang Zhang,Genqiang Zhang
Ru clusters have great potential as excellent bifunctional catalysts for the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR), but suffer from the difficulty of stabilization on the substrate and tuning the electronic environment. Herein, we present Ru clusters supported on N, S co-doped hollow carbon spheres (Ru/NSCS) by elaborately designed Ru–S bonds to anchor Ru clusters and optimize the surrounding coordination environment. The Ru/NSCS exhibits superior electrocatalytic performance for the HER and HzOR, where an ultrasmall overpotential of 40 mV and a working potential of −81 mV at 10 mA cm−2 can be achieved, respectively. The two-electrode system requires an applied voltage of only 26 mV to achieve 10 mA cm−2 and remains stable for 20 hours. Theoretical calculations reveal that the Ru–S bonds induce partial charge transfer from Ru clusters to the N, S co-doped carbon base, thus optimizing the adsorption energy of *H and dehydrogenation intermediates of N2H4.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hongmei Tang,Lin Lv,Haiyang Xian,Lingyu Ran,Bohong Chen,Yinxuan Fu,Yuandan Wu,Min Fan,Houzhao Wan,Hao Wang
Exploiting high-efficient low-cost metal-based electrocatalysts for oxygen evolution reaction (OER) in alkaline media is still urgent and challenging. Herein, a hierarchical nanostructure of manganese oxide/carbon@iron oxyhydroxide (denoted as Mn 3 O 4 /C@FeOOH) nano-octahedrons via a three-step approach. The optimal electrocatalyst Mn 3 O 4 /C@FeOOH was achieved and delivered a low overpotential of 295 mV at 10 mA cm −2 , a small Tafel slope of 47.6 mV dec −1 and a decent stability toward long-term electrolysis of 16 h with only 2.2% degradation. The excellent OER performance of the hybrid Mn 3 O 4 /C@FeOOH could be attributed to the synergistic effects of the individual counterparts, namely, the structural support of the amorphous carbon skeleton to maintain the integrity of microstructures, the enhanced conductivity imparted by the uniformly dispersed Mn 3 O 4 and graphite nanoparticles, and the partial electron redistribution between the Mn 3 O 4 /C and FeOOH interface, optimizing the adsorption/desorption of intermediate oxygenated species. This work provides a novel strategy to prepare an efficient and stable electrocatalyst for OER in alkaline media.
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INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Zhen Pu,Jianwei Qin,Xiaoguo Fu,Ruizhi Qiu,Bin Su,Maobing Shuai,Fang Li
Fundamental investigation of metal–CO interactions is of great importance for the development of high-performance catalysts to CO activation. Herein, a series of side-on bonded mononuclear lanthanide (Ln) oxocarbonyl complexes OLn(η2-CO) (Ln = La, Ce, Pr, and Nd) have been prepared and identified in solid argon matrices. The complexes exhibit uncommonly low C–O stretching bands near 1630 cm–1, indicating remarkable C–O bond activation in these Ln analogues. The η2-CO ligand in OLn(η2-CO) can be claimed as an anion on the basis of the experimental observations and quantum chemistry investigations, although the CO anion is commonly considered to be unstable with electron auto-detachment. The CO activation in OLn(η2-CO) is attributed to the photoinduced intramolecular charge transfer from LnO to CO rather than the generally accepted metal → CO π back-donation, which conforms to the traditional Dewar–Chatt–Duncanson motif. Energy decomposition analysis combined with natural orbitals for chemical valence calculations demonstrates that the bonding between LnO and η2-CO arises from the combination of dominant ionic forces (>76%) and normal Lewis “acid–base” interactions. The fundamental findings provide guidelines for the catalyst design of CO activation.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Haoyang Wu,Zhilong Tan,Bin Miao,Hailong Hu,Sanying Hou
In this work, Fe, N co-doped hierarchical porous graphite-like carbon with carbon-encapsulated Fe/Fe 3 C@ Fe-N-C was synthesized by a facile solid-phase synthesis strategy, and was employed as an efficient catalyst to activate peroxymonosulfate (PMS) for oxidation of tetracycline (TC). The optimal Fe-N/C 800 outlined a highly catalytic performance in activating peroxymonosulfate (PMS) with TC decomposition rate reaching 89.2 % in 20 min at ultra-low catalyst dosage. Meanwhile, the effect of operating parameters was also investigated in order to evaluate the potential of using Fe-N/C 800 in practical applications. In addition, the characterization analysis and experiments results elucidated that graphitic N, pyridinic N, C O, Fe 3 C, Fe 0 and FeN 4 were considered as the main reactive species promoting the PMS activation to generate reactive oxygen species (ROS) (including singlet oxygen ( 1 O 2 ), sulfate radical (SO 4 •- ) and hydroxyl radical (•OH)). The electron paramagnetic resonance (EPR) experiments and radicals quenching analyses further demonstrated that the non-radical species singlet oxygen ( 1 O 2 ) was the dominant reactive oxygen species. Moreover, the TC degradation pathways were presented by LC-MS. Ultimately, the toxicity of the intermediate products were also investigated by ECOSAR system.
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高影响因子
BIOCHEMICAL PHARMACOLOGY
·
2023
·
IF 5.8
Xiaoxiang Mo,Xiaoju Shen,Xiaocheng Mo,Fei Yu,Weidan Tan,Zhihua Deng,Jingchuan He,Zhuo Luo,Zhiquan Chen,Jie Yang
Small cell lung cancer (SCLC) is the most malignant lung cancer with rapid growth and early metastasis, but still lacks effective targeted therapies to improve the prognosis. Here, we demonstrated that a novel oncogenic protein, cell migration inducing hyaluronic binding protein (CEMIP), was robustly overexpressed in SCLC tissues than that in noncancerous tissues and high expression of CEMIP predicted poor outcomes in clinical specimens and in large sample size cohorts from public databases (GEPIA 2 and CPTAC). Liquid chromatography mass spectrometry (LC-MS) and in vitro/in vivo functional assays indicated that CEMIP contributed to the proliferation by increasing glutamine consumption and their metabolites (glutamate and glutathione) levels in SCLC cells. Moreover, the addition of a GLS1 inhibitor CB-839 dramatically reduced CEMIP-induced SCLC cell proliferation . Mechanistically, beyond as a scaffold protein , CEMIP facilitates glutamine-dependent cell proliferation through inhibiting c-Myc ubiquitination and increasing c-Myc stabilization and nuclear accumulation via hindering the interaction between FBXW7 (a E3 ubiquitin ligase) and its target substrate c-Myc. Taken together, our findings reveal a novel oncogenic role of CEMIP in sustaining SCLC growth via FBXW7/c-Myc-dependent axis, and provide new evidence that inhibition of CEMIP might be a potential therapeutic strategy for the treatment of SCLC.
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Surfaces and Interfaces
·
2023
·
IF 6.2
Jie Jiang,Yuqiang Ding
As a widely used semiconductor photocatalyst , TiO 2 has been explored in organic compounds hydrogenation. In this study, the hydrogenation of C=N bonds on the surface of TiO 2 was accomplished for the first time utilizing Cu 2 O/TiO 2 type-II (p-n) heterojunction . The probe reactions, hydrogenation of N -benzylphenylamine with benzyl alcohol, and N -methylation of amines with methanol exhibited that the hydrogenation of C=N bonds on TiO 2 surface can be achieved through borrowing hydrogen reaction (BH, alcohols as hydrogen source). Additionally, the BH reaction rate could be improved by adding external H + to the reaction system. The catalytic activity of Cu 2 O/TiO 2 was discovered to remain at an efficient level even after six reaction cycles.
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Frontiers in Pharmacology
·
2022
·
IF 5.988
Xiao Man,Chen Bocen,Niu Kun,Long Ziyu,Yang Fan,Xie Yiqiang
Background: Alpiniae Oxyphylla Fructus (AOF) is Traditional Chinese medicine and a dietary supplements for centuries, which posseses cardiotonic, neuroprotective, antioxidant, warming the kidney and nourish the spleen, these biological fuction is related to potential anti-aging properties. However, little is known about their effects on aging. This work aimed to investigate the effects of extracts of AOF on longevity and stress resistance in Caenorhabditis elegans (C. elegans) and the mechanisms that underlie its effects.Methods: Wild-type (WT) strand of C.elegans (N2)worms were cultured in growth medium with or without AOF. First, we examined the effects of AOF on lifespan, reproduction and healthspan assay, stress resistance and oxidative analysis, lipofuscin levels. Second, The levels of ROS and MDA, the antioxidant enzyme activities were examined to explore the underlying mechanism of AOF. Finally, the expression of the longevity-related genes were investigated to further understand the AOF’s underlying mechanism.Results: The lifespan of C. elegans was prolonged by 23.44% after treatment with high-dose AOF (100 ug/ml). AOF alleviated aging-related declines in C. elegans health and enhanced resistance to heat shock. Furthermore, AOF decreased reactive oxygen species and malondialdehyde, increased the activities of superoxide dismutase and catalase, and reduced accumulation of fat. AOF upregulated the expression of sod-3, gst-4, daf-16, and skn-1 but downregulated the expression of daf-2 and age-1 and accelerated the translocation of DAF-16 into the nucleus. The extended lifespan induced by AOF was reversed in daf-16(mu86) and skn-1(zu135) mutants, indicating that this gene is involved in AOF-regulated longevity.Conclusion: Our findings demonstrated that AOF extends lifespan and healthspan and enhances stress via boosting the activity of the antioxidant enzyme and controlling the expression of genes associated with insulin/IGF signaling and SKN-1 pathways. As a result, this work suggested AOF as a possible candidate to reduce the signs of aging by activating and inhibiting target genes.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 24
·7970
·
IF 4.6
Gang Deng,Lu Yao,Mingzhao Chen,Yuanyuan Yang,Song Lu,Guohua Wu
With the improvement in people’s living standards, the development and application of smart textiles are receiving increasing attention. In this study, a carbon nanosurface was successfully coated with a SiO2layer to form C@SiO2nanomaterials, which improved the dispersion of carbon nanomaterials in an aqueous solution and enhanced the absorption of light by the carbon nanoparticles. C@SiO2nanoparticles were coupled on the surface of silk fabric with the silane coupling agent KH570 to form C@SiO2nanosilk fabric. The silk fabric that was subjected to such surface modification was endowed with a special photothermal function. The results obtained with scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and infrared spectroscopy (FTIR) showed that C@SiO2nanoparticles were successfully modified on the surface of the silk fabric. In addition, under the irradiation of near-infrared light with a power of 20 W and a wavelength of 808 nm, the C@SiO2nanosilk fabric experienced rapid warming from 23 °C to 60 °C within 30 s. After subjecting the functional fabric to hundreds of photothermal experiments and multiple washes, the photothermal efficiency remained largely unchanged and proved to be durable and stable. In addition, the thermogravimetric (TG) analysis results showed that the C@SiO2nanoparticles contributed to the thermal stability of the silk fabric. The UV transmittance results indicated that C@SiO2nanofabric is UV-resistant. The silk modification method developed in this study is low-cost, efficient, and environmentally friendly. It has some prospects for future applications in the textile industry.
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高影响因子
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