ChemSusChem
·
2018
·Vol. 11
·期 23
·4060-4070
·
IF 7.411
Huimin Zhou,Xin Xia,Pengfei Lv,Jin Zhang,Xuebin Hou,Min Zhao,Kelong Ao,Di Wang,Keyu Lu,Hui Qiao,Malgorzata Zimniewska,Qufu Wei
Graphical Better anode by design : A designed anode structure combining the metallic conductivity of 1T-MoS 2 with interconnected TiO 2 /MoO 3 grains is beneficial for fast charge-transfer reactions and reduced transmission losses. Moreover, a flexible carbon framework buffers swollen lithium compounds, such as Li x MoO 3 and Li x MoS 2 , and supports the shrinking delithiated products, with potential for achieving high capacity stability in both Li- and Na-ion batteries. Integrating layered nanostructured MoS 2 with a structurally stable TiO 2 backbone to construct reciprocal MoS 2 /TiO 2 -based nanocomposites is an effective strategy. C@TiO 2 /MoO 3 composite nanofibers doped with 1T-phase MoS 2 nanograins were fabricated by partially sulfurizing MoO x /TiO 2 precursors. By controlling a suitable preoxidation temperature before severe thermolysis of polyvinylpyrrolidone (PVP), the MoO x /TiO 2 precursors formed a polymer-embedded array through coordination of the Mo source and pyrrolidyl groups of PVP. Sulfidation under water/solvent hydrothermal conditions led to partial formation of metallic 1T-phase MoS 2 from the MoO x precursor with preoxidation at 200 °C. After carbonization, the TiO 2 /MoO 3 /MoS 2 nanograins were encapsulated in a carbon backbone in a vertical pattern, providing both chemical contact for confined electron transport and sufficient space to adapt to volume changes. The obtained carbon-based platform not only has the advantages of an integral structure, but also exhibited ultrastable specific capacities of 540 and 251 mAh g −1 for Li-ion batteries and Na-ion batteries, respectively, after 100 cycles.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 79
·64358-64367
·
IF 3.84
Jian Cheng,Yan Dong,Hui Ma,Lixia Li,Zuliang Liu,Fengqi Zhao,Siyu Xu
A one-dimensional energetic complex (Na[CL-14·2H2O]) constructed from sodium and 5,7-diamino-4,6-dinitrobenzofuroxan (CL-14) was synthesized, and its crystal structure was analyzed by X-ray diffraction. The crystal belongs to a monoclinic system with space group P21/c. The complex possesses a one-dimensional coordination framework based on the [ONaN]n chain, which might result in its low sensitivity and high heat resistant. The thermal decomposition mechanism of Na[CL-14·2H2O] was predicted by means of TG-DSC, TG-MS and FTIR analyses. The thermal decomposition of Na[CL-14·2H2O] contains one endothermic and one exothermic processes in the temperature range of 25–500 °C with NaNCO, Na2CO3, H2O, NO and CO2 as the final products. The non-isothermal kinetic and thermodynamic parameters for the first exothermic process of the Na[CL-14·2H2O] have been studied, with the apparent activation energy, pre-exponential factor, entropy of activation, enthalpy of activation and free energy of activation of 280.7 kJ mol−1, 57.8, 282.7 J mol−1 K−1, 276.2 kJ mol−1 and 154.8 kJ mol−1, respectively. The impact sensitivity and friction sensitivity of Na[CL-14·2H2O] was tested according to general methods, with the values of 27 J and 360 N, respectively. Na[CL-14·2H2O] has been investigated as an energetic catalyst in ammonium nitrate (AN) by means of TG-DTG, TG-MS, DSC and extent of conversion (α)–T kinetic curve analyses. And the thermal kinetic constants for the catalytic and noncatalytic decomposition of AN samples were calculated using Kissinger's and Ozawa–Doyle's equations. The possible catalytic mechanism was also discussed and proposed. The results show that Na[CL-14·2H2O] decreases the peak temperature and activation energy value of the complete decomposition process for AN by 41.3 °C and 10.9 kJ mol−1, respectively. Furthermore, the thermal decomposition of AN in the presence of Na[CL-14·2H2O] starts at significantly lower temperature (about 30 °C) than that of pure AN. Apparently, Na[CL-14·2H2O] could be incorporated as a potential energetic catalyst in AN-based propellants.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Min Zhou,Dan Zheng,Kun Yang,Lifang Hu,Zhongbiao Zhang
Fenton catalytic oxidation is a prevalent advanced oxidation technology that can be integrated with photocatalysis and thermal catalysis to enhance the degradation of antibiotic wastewater. Zeolites, a distinctive class of crystalline material, are extensively employed in Fenton-like catalytic oxidation due to their robust structure and exceptional catalytic efficacy. In this study, we constructed a novel Cu/Ce-X catalyst via an ion exchange process based on a Na-X zeolite matrix. The crystal phases, framework structures, elemental compositions, specific surface areas, and photothermal catalytic activity of the composite catalyst were characterized systematically. The removal of tetracycline hydrochloride (TCH) was 87.69 % in the photothermal Fenton-like degradation, and the apparent first-order kinetics rate constant was 13.6 times, 6.52 times, and 1.72 times greater than those of the Fenton-like, photo Fenton-like, and thermal Fenton-like systems, respectively. The adaptability, reusability, reaction mechanisms, and degradation pathways of the fabricated catalysts for the removal of TCH were investigated. The experimental and characterization results demonstrate that the redox cycling of Cu + /Cu 2+ and Ce 3+ /Ce 4+ was enhanced through photogenerated electrons and thermal effects in the catalytic degradation process. The primary active species generated in the photothermal Fenton-like system is ·OH. The findings of this research provide a viable strategy for the treatment and remediation of water pollution.
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BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Jianli Zhang,Yutong Peng,Taoze Liu,Zhanghong Wang
In this study, papermaking black liquor lignin (ULG) was directly used to produce biochar through pyrolysis. It was found that ULG has a high ash content (15.38 %), primarily consisting of Na-related minerals. During pyrolysis, the ash can reduce the activation energy of ULG (by over 6 kJ/mol), promote the development of pore structures, and enhance the graphitization of the resulting biochar through self-catalyzation. Additionally, the Na-related minerals form abundant nanowhiskers on the surface of biochar during pyrolysis, mainly composed of Na 2 CO 3 and Na 3 PO 3 , achieving self-functionalization, particularly in biochar produced at 700 °C (ULG-700). In the adsorption process, these nanowhiskers on the surface of ULG-700 act as efficient active adsorption sites. The theoretical maximum adsorption capacity for Cd(II) and Zn(II) by ULG-700 at room temperature is 639.71 and 161.27 mg/g, respectively. This study suggests that ULG can be developed as a low-cost and high-efficient heavy metal adsorbent.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuan Zeng,Yuanyuan Wang,Linyao Ke,Qiuhao Wu,Xiaojie Tian,Liangliang Fan,Kirk Cobb,Yuhuan Liu,Roger Ruan,Yunpu Wang
The pyrolysis of metal soaps to produce hydrocarbon rich fuel has been studied extensively. However, the combined effects of microwave radiation and metal ion types on hydrocarbon production have not been addressed. In this study, the microwave and conventional pyrolysis experiments were conducted on five metal soaps (Li soap, Na soap, K soap, Ca soap, Mg soap). The results demonstrated that the metal ions at the carboxyl end of the soap enhanced the polarity of the reactants, leading to a rapid increase in temperature under microwave conditions. With the ion radius increasing, the heating rate increased gradually. Compared with conventional pyrolysis, microwave pyrolysis exhibited a more rapid heating rate, a higher degree of carbon chain fracture, and a greater abundance of small olefin compounds, which promoted aromatization reaction and the release of CO, H 2 and CH 4 . In addition, the composition of the pyrolysis products derived from different metal soaps is affected by the characteristics of metal ions. As the radius of metal ions increased, the oxygen content in the liquid products decreased gradually, while the carbon content increased. The strengthening effect of microwave was further analyzed. With the increase in the radius of metal ions, the strengthening effect of microwaves on olefins formation was gradually weakened, while the inhibiting effect on alkanes formation was gradually enhanced. The structure of carboxylate network is affected by the radius of metal ions, which results in the regular change of the strengthening effect of microwave on olefins and other products. This study is highly significant in guiding the pyrolysis of soapstock waste to prepare olefins and alkanes with high efficiency and low energy consumption.
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Nanoscale
·
2024
·
IF 5.8
Liping Lian,Hui Xu,Ruchen Shu,Yujie Tan,Nan Wang,Jinzhu Ma,Feng Qin,Danyan Cen,Jianyuan Hou,Renxi Zhang
A novel catalyst was fabricated using a two-step nonthermal plasma method by regulating surface hydroxyl groups on Na/activated carbon (AC) with 0.1 wt% Pt loading (Pt/Na/AC (P&P)) and achieved high formaldehyde (HCHO) oxidation performance at ambient temperature. Based on characterization results, we found that in the first step of nonthermal plasma treatment under argon–water, the proportion of terminal OH groups (ter-OH groups) evidently increased. Following the introduction of Na and Pt, the relative abundance of doubly bridged OH groups connecting C and Na (briNa–C-OH groups) and Pt2+ species also increased in the second step of nonthermal plasma reduction under argon, resulting in enhanced HCHO catalytic oxidation capability through a rapid reaction pathway ([HCOO−] + [OH]a → CO2 + H2O). Compared with the catalyst prepared via nitric acid oxidation and thermal deposition (Pt/Na/AC (H&T)), more Pt–Ox–Na species and surface OH groups were obtained on the Pt/Na/AC (P&P) catalyst, which not only reduced Pt consumption but also improved HCHO catalytic activity with around 100% conversion of HCHO to CO2 at 25 °C, while the Pt/Na/AC (H&T) catalyst only achieved 70% conversion. This work thus provides a new strategy for HCHO oxidation at room temperature and a novel perspective on the environmentally friendly synthesis of effective noble catalysts.
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Energy Storage Materials
·
2024
·
IF 18.9
Gege Wang,Yichao Wang,Lingbo Yao,Jianhua Yang,Xiaowei Chi,Yu Liu
Aqueous zinc metal batteries with unique advantages of intrinsic safety and low cost are considered as one of the most promising next-generation energy-storage technologies. However, their lifespan is significantly constrained by the electrolyte, specifically due to limitations caused by proton-induced HER and dendritic growth at the anode side and dissolution phenomena at the cathode. Unlike most studies on the protic electrolyte systems, herein, a new aprotic hybrid electrolyte of Na/Zn tetrafluoroborate-trimethyl phosphate with ultralow proton activity tuned by reconstruction of hydrogen bonding network and ultrahigh interfacial stability endowed by simultaneous formation of SEI and CEI were designed for the first time. Attributed to the synergistic effect of proton activity attenuation and ZnF 2 -Zn 3 (PO 4 ) 2 SEI formation, HER-trigged corrosion current was decreased by 96.52%, which leads to an exceptionally high coulombic efficiency up to 99.63%, and operational lifespan exceeding 2000 hours at 1 mA cm − 2 / 1 mAh cm − 2 for Zn||Cu asymmetric cell and Zn||Zn symmetric cell, respectively. Furthermore, the suppression of excess hydrated proton co-insertion reaction and construction of inorganic-organic CEI enabled the PBAs||Zn full cell a prolonged cycling life of 6000 cycles with an ultralow decay rate of 0.004% per cycle. The special electrolyte utilizing cheap tetrafluoroborate salts in conjunction with cost-effective PBA cathode and Zn anode provides a new choice for low-cost, high-safety, non-toxic batteries for practical applications.
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DRUG DEVELOPMENT RESEARCH
·
2021
·Vol. 82
·期 7
·969-979
·
IF 4.36
Ruixian Xing,Xuewen Liu,Buxian Tian,Yan Cheng,Longguang Li
Parkinson's disease (PD) is a disabling neurodegenerative disease mainly caused by degeneration of mesencephalic dopaminergic neurons in the substantia nigra pars compacta (SNpc). The neuroprotective role of Na + /H + exchangers isoform-1 (NHE1) inactivation in cerebral ischemic damage has been elucidated. The current study aimed to investigate the impacts of NHE1 in PD. In this study, 6-hydroxydopamine (6-OHDA)-induced PD rat models were established to attempt to illuminate the role and underlying mechanisms of NHE1 in SNpc neurons of PD. Meanwhile, nerve growth factor-stimulated PC12 cells followed by 6-OHDA treatment was used to mimic PD in vitro. Results showed that the protein levels of NHE1 were significantly increased in the SNpc neurons of rats and differentiated PC12 cells after 6-OHDA treatment. Inactivation of NHE1 with chemical inhibitor HOE642 suppressed SNpc neuronal loss and NHE1 expression in PD rats. The overlays of tyrosine hydroxylase and NHE1 displayed that NHE1 expression was not colocalized but closely associated with TH. Besides, treatment with HOE642 relieved the dyskinesia, mitochondrial dysfunction, and neuronal apoptosis. Further in vitro evidence confirmed that inhibition of NHE1 by genetic-knockdown prevented mitochondrial dysfunction and apoptosis. Our study represents the first experimental evidence of a potential role for NHE1 in the pathogenesis of PD.
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高影响因子
Energy Storage Materials
·
2020
·
IF 16.28
Dongming Xu,Huanwen Wang,Ruyun Qiu,Qiang Wang,Zhifei Mao,Yingjun Jiang,Rui Wang,Beibei He,Yansheng Gong,Debao Li,Xianluo Hu
Sodium-ion hybrid capacitors (SIHCs) show great promise due to their combination of high energy-storage properties and low cost of Na resources. Yet most anodes in SIHCs suffer from sluggish Na + -diffusion kinetics and relatively low specific capacity, which restrict their widespread development. Herein, bowl-like VS 2 nanosheet arrays are uniformly and robustly anchored on a carbon nanofiber (CNF) substrate through a one-step solvothermal method. The bowl-like VS 2 is featured with an ultrathin thickness (several atomic layers), intrinsically metallic conductivity and an interconnected array architecture. This unique structural design can not only facilitate ultrafast Na + ion-diffusion, but also suppress capacity decay of VS 2 that is caused by the conversion process below 0.3 V. DFT calculations demonstrate a faster Na + transport rate and a lower diffusion energy barrier for the VS 2 /C interface than for the VS 2 /VS 2 bilayer. The quasi-solid-state SIHC full cell that integrates the CNF@VS 2 anode and the graphene sheets-wrapped carbon nanofiber (CNF@GS) cathode, displays prominent energy//power densities in the voltage range of 0.0–4.0 V (116 Wh kg −1 at 0.4 kW kg −1 ; 66 Wh kg −1 at 40 kW kg −1 based on the total mass of both electrodes), outperforming recent SIHCs.
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FEBS Journal
·
2018
·Vol. 285
·期 12
·2292-2305
·
IF 4.53
Jin-Hua Guo,Ren-Wang Jiang,Jacob Lauwring Andersen,Mikael Esmann,Natalya U. Fedosova
The information obtained from crystallized complexes of the Na + ,K + -ATPase with cardiotonic steroids (CTS) is not sufficient to explain differences in the inhibitory properties of CTS such as stereoselectivity of CTS binding or effect of glycosylation on the preference to enzyme isoforms. The uncertainty is related to the spatial organization of the hydrophilic cavity at the entrance of the CTS-binding site. Therefore, there is a need to supplement the crystallographic description with data obtained in aqueous solution, where molecules have significant degree of flexibility. This work addresses the applicability of the electron paramagnetic resonance (EPR) method for the purpose. We have designed and synthesized spin-labeled compounds based on the cinobufagin steroid core. The length of the spacer arms between the steroid core and the nitroxide group determines the position of the reporting group (N-O) confined to the binding site. High affinity to Na + ,K + -ATPase is inferred from their ability to inhibit enzymatic activity. The differences between the EPR spectra in the absence and presence of high ouabain concentrations identify the signature peaks originating from the fraction of the spin labels bound within the ouabain site. The degree of perturbations of the EPR spectra depends on the length of the spacer arm. Docking of the compounds into the CTS site suggests which elements of the protein structure might be responsible for interference with the spin label (e.g., steric clashes or immobilization). Thus, the method is suitable for gathering information on the cavity leading to the CTS-binding site in Na + ,K + -ATPase in all conformations with high affinity to CTS .
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高影响因子
Small
·
2024
·Vol. 21
·期 8
·2409041
·
IF 13
Zhijian Huang,Mingpei Tan,Ming Liu,Yukai Hua,Yong Liu
Na 0.67 Ni 0.33 Mn 0.67 O 2 (NNM) is regarded as a promising cathode material for Na-ion batteries (NIBs), but suffers from irreversible phase transformations characterized by multiple voltage plateaus, resulting in poor cycle stability and inferior rate capability. To address these issues, the Na 0.67 Ni 0.18 Cu 0.10 Zn 0.05 Mn 0.67 O 2 (NNCZM) cathode material is synthesized by a cation chelation and reassembly process, which can promote a more uniform element distribution than that prepared by the solid-state method (S-NNCZM), resulting in better Na + diffusion kinetics and rate capability. Replacing Ni 2+ with a small amount of Zn 2+ prevents the P2-O2 phase transformation, while replacing Ni 2+ with an appropriate amount of electrochemically active Cu 2+ eliminates Na-vacancy ordering and additionally contributes to capacity. Thus, the dual substitution of Cu 2+ and Zn 2+ for Ni 2+ makes the NNCZM electrode synergistically achieve a complete solid solution reaction and better cycling stability. Accordingly, it exhibits a large discharge capacity (110.2 mA h g −1 at 10 mA g −1 ) with a high initial coulombic efficiency (97.3%), remarkable cycle stability with 84.1% capacity retention over 200 cycles at 200 mA g −1 , and excellent rate capability with a discharge capacity of 61.0 mA h g −1 at 2000 mA g −1 , significantly outperforming the NNM and S-NNCZM electrodes.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Decai Zhu,Jie Yu,Yingbo Zhang,Jiamei Liu,Yuzhao Ouyang,Jiangyu Yu,Zhongqing Liu,Wenliang Fan,Xixi Bai,Nan Wang,Erjun Bu,Chengjun Zhu
The LiNi 0.8 0 Co 0.15 Al 0.05 O 2-δ (LNCA) electrode exhibits better catalytic activity in low-temperature solid oxide fuel cells (LT-SOFCs). However, LNCA still faces some challenges in commercialization due to poor stability, scarcity of lithium resources, and high costs. Here, Na-doped LNCA electrode not only enriches oxygen vacancies and prolongs long-term stability, but also maintains a layered structure and reduces costs. At 550 °C, under the optimal ratio of L 0.85 Na 0.15 NCA electrode, the maximum power density (MPD) of a single cell reaches 1147 mW cm −2 with an open circuit voltage (OCV) of 1.13 V and a polarization impedance (R p ) of 0.21 Ω cm 2 , which is 30.6% higher than the single cell power (878 mW cm −2 ) of the Na-undoped LNCA electrode. The cell maintained long-term stability for 108 h at a constant current density of 156.25 mA cm −2 and a voltage of about 0.9 V. The results indicate that Na-doped LNCA is an effective strategy to improve the electrochemical performance of LNCA and long-term stability of cell.
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