JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Qiqin Liang,Lei Wang,Xiaosi Qi,Qiong Peng,Xiu Gong,Yanli Chen,Ren Xie,Wei Zhong
Impedance matching characteristics and loss capabilities including magnetic loss, polarization loss and conduction loss are critical factors to improve microwave absorption performances (MAPs). To elevate these aspects, herein, yolk-shell structured CoNi@Air@C/SiO 2 @Polypyrrole (PPy) magnetic multicomponent nanocubes (MCNCs) were designed and successfully fabricated in high efficiency through a continuous co-precipitation route, classical Stöber method, thermal treatment and polymerization reaction. The obtained results indicated that the formation of SiO 2 effectively stabilized the cubic geometrical morphology and yolk-shell structure during the high-temperature pyrolysis process. The introduction of PPy greatly boosted their polarization loss and conductive loss capabilities. Therefore, the as-prepared yolk-shell structured CoNi@Air@C/SiO 2 @PPy MCNCs presented superior MAPs compared to CoNi@Air@C/SiO 2 MCNCs. Furthermore, by regulating the content of PPy, the obtained CoNi@Air@C/SiO 2 @PPy MCNCs displayed tunable and excellent comprehensive MAPs in terms of strong absorption capabilities, broad frequency bandwidths and thin matching thicknesses, which could be ascribed to the unique structure and excellent magnetic-dielectric synergistic effect. Therefore, our findings provided an alternative pathway to effectively utilize the magnetic-dielectric synergy and loss capabilities for the developing yolk-shell structured magnetic MCNCs as the strong wideband microwave absorbers.
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高影响因子
Journal of Materials Chemistry A
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2023
·Vol. 11
·期 5
·2233-2245
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IF 11.9
Ke Tan,Zhaolin Tan,Sen Liu,Guoqiang Zhao,Yang Liu,Linrui Hou,Changzhou Yuan
Li–S batteries (LSBs), owing to their superior energy density, cost-efficiency, and environment-friendliness, are established as one of the most potential next-generation electrochemical energy storage systems. However, the shuttle effect of lithium polysulfides (LPSs) and the poor conductivity of active substances are the main challenges to their practical applications. Herein, we propose a synergistic strategy involving heterogeneous and homogeneous catalysts. First, MIL-47 as-derived core–shell carbon nanorods decorated with a V3S4 nanosheet shell (V3S4@C) were smartly constructed and applied as the host material for sulfur cathodes. The resulting V3S4@C not only enhanced the electronic conductivity of the integrated cathode but promoted LPSs chemisorption and conversion as heterogeneous catalysts. The optimized Co(C5H5)2 was further introduced into the electrolyte as a homogeneous catalyst, improving the conversion efficiency of LPSs and electrolyte wettability. Benefiting from the synergistic contributions of the V3S4@C host and the homogeneous catalyst Co(C5H5)2, the assembled LSBs with S/V3S4@C as the cathode exhibited outstanding long-life cycling performance and high-rate behavior, particularly in cases with high sulfur loading and low electrolyte dosage. More significantly, our work promises a feasible pathway for commercial applications of advanced LSBs.
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Journal of Water Process Engineering
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2022
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IF 7.34
Yifan Liang,Zengrui Pan,Jianlong Sheng,Yongjiong Ni,Jun Li
To enhance nitrogen removal in wastewater treatment , a novel method of wrapping waste iron shavings (Fe-C) in polyurethane sponge cubes tied in anoxic zones of a continuous reactor was proposed. Three types of denitrifying bacteria were enriched simultaneously in biofilms and activated sludge , including iron autotrophic denitrifying bacteria (7.83–8.71 %), heterotrophic denitrifying bacteria (10.60–11.95 %), and heterotrophic nitrification-aerobic denitrifying bacteria (23.47–40.06 %). Iron autotrophic denitrifying bacteria ( Dechloromonas and Sphaerotilus ) can remove NO 3 − -N using Fe 2+ as electron donor produced by micro-electrolysis of iron shavings without organic carbon demand, and heterotrophic nitrification-aerobic denitrifying bacteria ( Ferribacterium and Zoogloea ) can simultaneously accomplish nitrification and denitrification under aerobic conditions . The enrichment of these two functional bacteria strengthened the nitrogen removal performance compared to conventional heterotrophic denitrifying process, which could achieve efficient and stable total nitrogen removal (87.4 %) even with low organic carbon. In addition, the synergy of biological and chemical processes through Fe-C micro-electrolysis also enhanced total phosphorus removal (86.0 %).
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CERAMICS INTERNATIONAL
·
2022
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IF 5.532
Mengxiao Zhao,Tian Fang,Liping Ni,Yaping Zhu,Ruili Zhang,Ping Chen,Anjian Xie,Yuhua Shen
Copper phosphide has shown remarkable development potential in the anode materials of lithium ion batteries (LIBs) due to its high mass/volume ratio capacity. Nevertheless, the low conductivity and volumetric expansion in the cycling process restrict its practical application. Herein, we ingeniously designed and successfully prepared copper phosphide (Cu 3 P)@carbon (C) nanocomposite with multi-stage pore inverse opals (Cu 3 [email protected] MSPIOs), including possessed the ordered macropores with the mean aperture of ∼100 nm induced by polystyrene (PS) sphere templates and the mesoporous structure with the pore size range of 3.0-9.5 nm and 16–27 nm derived from metal-organic framework (MOF) precursor. Compared to the Cu 3 [email protected] particles prepared without PS sphere templates, the Cu 3 [email protected] MSPIOs as the anode materials demonstrated exceptional lithium storage performance. At a high current density of 2 A g -1 , the discharge specific capacity of Cu 3 [email protected] MSPIOs was 295 mA h g -1 in the 1st cycle while that dropped to 204 mA h g -1 during the 2nd one, and then gradually stabilized. After 1500 cycles, the discharge specific capacity can still reach to 166.3 mA h g -1 , maintaining 81% capacity compared to the 2nd discharge specific capacity, which indicates the Cu 3 [email protected] MSPIOs as the anode material presented good cycling stability. Apparently, the multi-stage pore structure, which can effectively resolve the volumetric change problem during lithium ion (Li + ) intercalation/deintercalation as well as facilitate contact between electrolyte and anode, is primarily responsible of the superior Li-ion storage property of Cu 3 [email protected] MSPIOs. At the same time, MOF derived carbon can improve electrical conductivity, accelerate the formation of a stable solid electrolyte interface membrane and also provide buffer layers to further alleviate volumetric expansion.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Ke Wu,Chunlei Wu,Wenou Bai,Ning Li,Yangqin Gao,Lei Ge
Hydrogen energy is vital important for solving pollution of environment and energy shortage. Hydrogen production via solar energy and semiconductor photo-splitting water is one of the most environmentally friendly strategies at present. In this work, Co-N-C, a non-noble metal-based ZIF-67 derivative, was employed as a co-catalyst to achieve an in situ growth of spherical CdS via simple one-step hydrothermal. Due to the large specific surface area of Co-N-C, the agglomeration of CdS is avoided and the photocorrosion phenomenon is weakened. Under irradiation of visible light , the hydrogen generation activity of Co-N-C/CdS was achieved 905 μmol g −1 h −1 . It is 6 times that of pure CdS with excellent stability. At the contact interface of the Co-N-C and CdS, the transfer and the separation of photoinduced carriers had been enhanced by a great many of channels. DFT calculation further showed that Co nanoclusters , as the active sites of hydrogen production, significantly enhanced photocatalytic hydrogen evolution activity. Therefore, Co-N-C not only acts as electron acceptor , but also serves as support of highly dispersed CdS to promote the stability of system during photocatalytic hydrogen generation. This work demonstrates the advantages of CdS binding MOF derivatives to construct composite photocatalysts with enhanced dispersibility and hydrogen production activity.
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高影响因子
WASTE MANAGEMENT
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2022
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IF 8.816
Yan Li,Guangyu Chen,Wenxin Liu,Chentong zhang,Liuqing Huang,Xuetao Luo
Owing to the rapid advancement of the photovoltaic industry, a lot of photovoltaic (PV) silicon waste will be generated. Thus, the recycling and reuse of waste silicon have become particularly important, both for environmental remediation and economic benefits. In this work, a special structure of porous Si nanoparticles embedded nano-Ag and coated carbon layer (P-SiNPs/Ag@C) was produced by silver-assisted chemical etching (Ag-ACE) the deposited silicon waste. The special porous structure and carbon layer coating can effectively address the volume expansion issues during charge/discharge. The intercalated Ag nanoparticles greatly reduced the transfer impedance and enhanced the electrical conductivity of the anode material. As a result, the novel-designed P-SiNPs/Ag@C anode can maintain a prominent reversible capacity (1521 mAh·g −1 at 0.2 A g −1 after 50 cycles) and outstanding rate performance (1099 mAh·g −1 at 2 A g −1 ). When the current density at 1 A g −1 , the specific capacity still maintains at 706 mAh·g −1 over 300 cycles. The superiority of the prepared P-SiNPs/Ag@C structures was further confirmed by Comsol Multiphysics software. Impressively, the synthesis route provides a novel avenue for value-added utilization of residual silicon waste resources from EB refining silicon and the preparation of high-performance lithium battery silicon-based anode.
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PubMed
高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Hui Yao,Wan-ting Zhang,Ting-yu Yan,Xiao-qin Li,Xiao-feng Wang
Metal-Organic Frameworks (MOFs) are promising materials in electrochemical sensor. Herein, Cu-doped zeolitic imidazolate framework (ZIF) was synthesized by hydrothermal method. The prepared composite was characterized by XRD, FTIR and SEM. Then the material was modified onto the surface of glass carbon electrode (GCE) with chitosan(CHIT) and Cytochrome C (cyt c ). The modified electrode showed good electrochemical activity toward the reduction of hydrogen peroxide (H 2 O 2 ). Under optimized conditions, the linear response of the sensor to H 2 O 2 ranges from 10～5200 μM, with a detection limit of 3.7 μM (S/N=3). Finally, the sensor was successfully applied to determine H 2 O 2 in water samples. Thus, the Cu-doped ZIF material has great potential for applications in electrochemical sensors.
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高影响因子
ChemSusChem
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2023
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IF 8.4
Jiaji Zhang,Gaobo Lin,Jie Zhu,Sifan Wang,Wenhua Zhou,Xiangzhou Lv,Bolong Li,Jianghao Wang,Xiuyang Lu,Jie Fu
Graphical We find that the N-doped Ni particles can enhance the adsorption of CO 2 and modulate the configuration of adsorbed CO on Ni-N-C sites. As a result, the optimal catalyst can efficiently convert CO 2 into CO with a faradaic efficiency of 96.7 % and a current density of 500 mA cm −2 in a strongly acidic electrolyte. Electro-chemically reducing CO 2 in a highly acidic medium is promising for addressing the issue of carbonate accumulation. However, the hydrogen evolution reaction (HER) typically dominates the acidic CO 2 reduction. Herein, we construct an efficient electro-catalyst for CO formation based on a core-shell structure, where nitrogen-doped Ni nanoparticles coexist with nitrogen-coordinated Ni single atoms. The optimal catalyst demonstrates a significantly improved CO faradaic efficiency (FE) of 96.7 % in the acidic electrolyte (pH=1) at an industrial-scale current density of 500 mA cm −2 . Notably, the optimal catalyst maintains a high FE of CO exceeding 90 % (current density=500 mA cm −2 ) in the electrolyte with a wide pH range from 0.67 to 14. In-situ spectroscopic characterization and density functional theory calculations show that the local electron density of Ni-N-C sites is enhanced by N-doped Ni particles, which facilitates the formation of *COOH intermediate and the adsorption of *CO. This study demonstrates the potential of a hybrid metal/Ni-N-C interface in boosting acidic CO 2 electro-reduction.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Hongjun Wang,Jiafu Wang,Wentong Li,Zhe Li,Xiaoyu Zhang,Weitao Zheng,Tan Su,Jiaqi Zhang
The utilization of conductive hydrogels , particularly in the domain of wearable technology, has garnered substantial attention. However, the limited mechanical properties, low sensitivity, and lack of multifunctionality in conventional conductive hydrogels constrain their potential applications. Thus, the endeavor to develop conductive hydrogels with exceptional comprehensive performance remains a formidable challenge. In this investigation, chitosan quaternary ammonium salts and the conductive polymer poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) were employed as precursor materials, incorporating carboxylated cellulose nanofibers , to synthesize a novel double-crosslinked network hydrogel. The resulting hydrogel specimen exhibited noteworthy tensile strength (2.13 MPa), significantly enhanced elongation (547%), favorable strain sensitivity (Gauge Factor ranging from 0.91 to 9.78), and electrical self-healing capabilities. Additionally, it demonstrated accurate detection of subtle human movements and conversion of raw data into binary data. This research provides valuable insights into the advancement of conductive hydrogels for wearable soft electronics.
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高影响因子
Inorganic Chemistry Frontiers
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2023
·Vol. 10
·期 19
·5591-5601
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IF 7
Xin Zhang,Ling-Hua Jin,Yan-Yan Li,Zi-Zhen Xiao,Yu Feng,Ying-Wu Lin,Ye Zhang
The development of sensitive and real-time detection of human cytochrome c (Cyt c) has attracted significant interest since Cyt c plays an important role in programmed cell apoptosis and death, which has been considered an essential biomarker for early cancer diagnosis in human bodies. Herein, a self-powered photoelectrochemical (PEC) immunosensor based on Cu3SnS4 nanoflower is constructed for the ultra-sensitive and portable real-time detection of Cyt c. Systematic studies reveal that Cu3SnS4 has a large specific surface area and appropriate bandgap with excellent visible light absorption, which is beneficial for efficient PEC conversion. The prepared PEC immunosensor shows good reproducibility, high specificity, good storage stability, and excellent detection capability of Cyt c in clinical serum samples. The immunosensor shows dynamic linear detection of Cyt c in the range from 1 fM to 1000 nM along with an ultra-sensitive detection limit of 0.35 fM. Additionally, a portable real-time detection platform of Cyt c is designed, and the platform shows satisfactory linear correlation within the detection range from 1 fM to 1000 nM. We believe that this work provides a useful perspective for manufacturing portable ultra-sensitive and real-time PEC immunosensor for human Cyt c detection in early clinical diagnosis.
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高影响因子
CARBON
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2023
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IF 10.9
Lizhen Hu,Jiayou Liu,Xiaoxiang Huang,Qianqian Nie,Penglei Liu,Zhongchao Tan,Hesheng Yu
Using nanoclusters and single atoms with unique activity to replace nanoparticles is a promising strategy to enhance catalyst activity. However, stable loading of nanoclusters and single atoms remain a challenge. This paper reports atomically dispersed Pt bridged with metal-organic framework (MOF)-derived ZnO/C through carbon atoms (Pt–ZnO/C), by impregnation combined with calcination , for photocatalytic oxidation of NO. The MOF-derived ZnO/C has a larger specific surface area than pure ZnO. The presence of C enhances the visible light absorption, promotes the migration of photogenerated carriers , and more importantly facilitates the stabilization of Pt single atoms through Pt–C interactions. The Pt species present in the Pt–ZnO/C catalysts in the form of single atoms and nanoclusters. The Pt–ZnO/C catalysts show high NO conversion rates and selectivity towards NO 3 − /NO 2 − ions formation. Specifically, the NO conversion rate of 81.9% is much higher than those of ZnO/C (31.4%) and Pt nanoparticles loaded ZnO/C (Pt NPs-ZnO/C, 58.6%). In addition, the selectivity of NO 3 − /NO 2 − (i.e., 98.6%) formation over the Pt–ZnO/C catalyst is much higher than that of NO 2 (i.e., 1.4%). Furthermore, the photocatalysis tests and ESR results suggest that the Pt single atoms and nanoclusters can enhance the oxidation of NO by promoting the production of O 2 •- and OH • . The DFT results also reveal that single Pt atoms promote the adsorption of O 2 and H 2 O to form O 2 •- and OH • . More importantly, OH • can promote the selective oxidation of NO to NO 3 − /NO 2 − ions. In addition, the projected density of states of single Pt atoms loaded on the ZnO/C catalysts show that the presence of C atom bridge favors the stability of single Pt atoms because of the interaction between C and Pt atoms. This work provides a new strategy for the design of single-atom-loaded metal oxide catalysts.
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高影响因子
Journal of Functional Foods
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2023
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IF 5.6
Rui Zhang,Xudong Lin,Ying Song,Yanfeng Tuo,Guangqing Mu,Shujuan Jiang
Constipation is a common intestinal disease and is correlated with gut microbiota dysbiosis. Given that current drug treatments can cause side effects, probiotics treatment may be a promising alternative approach. In this study, four strains of Lactiplantibacillus plantarum which have the ability to alleviate intestinal inflammation were selected, including L. plantarum AHQ-14, HM-22 isolated from Xinjiang dairy products, and L. plantarum Y12, Y44 isolated from turbot intestine in Dalian market. The effects of L. plantarum strains on loperamide-induced constipation in mice were measured and the potential mechanisms were illustrated by constipation and physicochemical indexes, histological morphology, metabolites and microbiota composition analysis. The results of this study suggested that L. plantarum Y44 could somewhat relieve the symptoms in mice with constipation, while it could not relieve constipation by improving gastrointestinal regulatory peptides and 5-HT levels. The study also found that L. plantarum AHQ-14, HM-22 and Y12 significantly increased the fecal water content and improved GI motility, regulated the levels of gastrointestinal regulatory peptides and 5-HT, and increased the concentration of short-chain fatty acids (SCFAs) on fecal in constipated mice. Furthermore, L. plantarum AHQ-14, HM-22 and Y12 significantly altered the microbiota flora of constipated mice by increased the abundance of potentially beneficial bacteria (e.g. Lactobacillus and Alistipes ) and decreased potentially pathogenic bacteria (e.g. Erysipelatoclostridium and Helicobacter ). These results suggested that L. plantarum AHQ-14, HM-22 and Y12 could effectively relieved constipation in mice by loperamide-induced and have potential application value in constipation treatment.
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高影响因子
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