ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Dan Zhang,Yixin Luo,Jiaxiang Liu,Yu Dong,Cong Xiang,Chenke Zhao,Hongbo Shu,Jianhua Hou,Xianyou Wang,Manfang Chen
The practical progress of lithium–sulfur batteries is hindered by the serious shuttle effect and the slow oxidation–reduction kinetics of polysulfides. Herein, the ZnFe2O4–Ni5P4 Mott–Schottky heterojunction material is prepared to address these issues. Benefitting from a self-generated built-in electric field, ZnFe2O4–Ni5P4 as an efficient bidirectional catalysis regulates the charge distribution at the interface and accelerates electron transfer. Meanwhile, the synergy of the strong adsorption capacity derived from metal oxides and the outstanding catalytic performance that comes from metal phosphides strengthens the adsorption of polysulfides, reduces the energy barrier during the reaction, accelerates the conversion between sulfur species, and further accelerates the reaction kinetics. Hence, the cell with ZnFe2O4–Ni5P4/S harvests a high discharge capacity of 1132.4 mAh g–1 at 0.5C and displays a high Coulombic efficiency of 99.3% after 700 cycles. The ZnFe2O4–Ni5P4/S battery still maintains a capacity of 610.1 mAh g–1 with 84.4% capacity retention after 150 cycles at 0.1C under a high sulfur loading of 3.2 mg cm–2. This work provides a favorable reference and advanced guidance for developing Mott–Schottky heterojunctions in lithium–sulfur batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wei Deng,Kun Xiong,Nina Ge,Miao Yu,Lin Chen,Jun Wang
For efficient removal of the residual tetracycline (TC) in the aquatic environment, a novel cobalt (Co) and titanium (Ti) co-doped zinc ferrite (CoTiZFO) film was prepared via the Langmuir-Blodgett (LB) method in this study. With the co-doping of Co and Ti, the interfacial photoelectrocatalytic (PEC) activities for degradation of TC by the LB-assembled CoTiZFO (LB-CoTiZFO) films were significantly improved. As the applied voltage was 0.6 V in a two-electrode system, the five-layered LB-CoTiZFO (LB-CoTiZFO-5) films exhibited the optimal TC degradation rate and mineralization rate, which were accordingly 92.85% ± 1.45% and 81.92% ± 0.26%. In the same case, the kinetic rate constant ( k ) for PEC degradation of TC by the LB-CoTiZFO-5 films is equivalent to 3.3-fold of that by the films without the co-doping of Co and Ti. Under the PEC circumstances, the Co 3+ and Ti 4+ in the LB-CoTiZFO-5 film would be reduced to Co 2+ and Ti 3+ , while the Fe 2+ was oxidized to Fe 3+ , which results in the surface rearrangement of the LB-CoTiZFO-5 film. In addition, the Density Functional Theory (DFT) calculation results manifest the covalency competition in the Zn-O-Fe backbone can lead to the Fe-O bond breakage, the bare Fe metals with unpaired valence electrons will diffuse to the Helmholtz layer and serve as active sites, which endows the LB-CoTiZFO-5 films with boosted interfacial PEC activities. Therefore, the LB-CoTiZFO-5 film photoanode shows great prospective in efficient PEC degradation of TC.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Yuan Gao,Lian-Peng Li,Si-Yan Gong,Jia-Hui Huang,Shuo Xiang,Gan He,Qiong-Yu Wang,Mian Hu,Junliang Wang,Zhiyan Pan,Zhong-Ting Hu
Neonicotinoids as one of the newest major class of insecticides is a kind of persistent pollutants. Herein, copper-substituted zinc ferrites (Cu 0.75 Zn 0.25 Fe 2 O 4 ) prepared in subcritical aqueous solution has a nanosize of ∼2 nm with high crystallinity and strong magnetic property. At low catalyst dosage of 0.05 g L −1 , peroxymonosulfate (PMS) can be effectively converted into sulfate radicals in Cu 0.75 Zn 0.25 Fe 2 O 4 /PMS system. Thiamethoxam (THIA) degradation rate is in the order of Cu 0.75 Zn 0.25 Fe 2 O 4 > CuFe 2 O 4 > ZnFe 2 O 4 (124, 84, 21 × 10 −3 min −1 , respectively). At pH ∼7.0, THIA degradation efficiency can be over 99 % in 40 min. The radical species ( e.g. , HO • , SO 4 •− and 1 O 2 ) were demonstrated by EPR spectra using probe molecules. The majority effects in Cu 0.75 Zn 0.25 Fe 2 O 4 /PMS system with kinetics modelling were comprehensively investigated as well. This work provides that multi-metal coupling, i.e. , Cu(Ⅰ)/Cu(Ⅱ) & Fe(Ⅱ)/Fe(Ⅲ), in spinel structure by polyhedral design is an effective strategy for enhancing the catalytic activity. The Cu 0.75 Zn 0.25 Fe 2 O 4 /PMS system has promising for water treatment of neonicotinoid insecticide with ease of recycling catalysts by magnetic separation.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 22
·2207077
·
IF 13.3
Hui Wang,Yu Guan,Chun Li,Jia Chen,Shaoyu Yue,Jieying Qian,Bangshun Dai,Changqin Jiang,Chenghao Wen,Longping Wen,Chaozhao Liang,Yunjiao Zhang,Li Zhang
Therapeutic efficacy for prostate cancer is highly restricted by insufficient drug accumulation and the resistance to apoptosis and immunogenic cell death (ICD). Although enhanced permeability and retention (EPR) effect of magnetic nanomaterials could benefit from external magnetic field, it falls off rapidly with increased distance from magnet surface. Considering the deep location of prostate in pelvis, the improvement of EPR effect by external magnetic field is limited. In addition, apoptosis resistance and cGAS-STING pathway inhibition-related immunotherapy resistance are major obstacles to conventional therapy. Herein, the magnetic PEGylated manganese-zinc ferrite nanocrystals (PMZFNs) are designed. Instead of providing external magnet, micromagnets into tumor tissues are intratumorally implanted to actively attract and retain intravenously-injected PMZFNs. As a result, PMZFNs accumulate in prostate cancer with high efficacy, depending on the established internal magnetic field, which subsequently elicit potent ferroptosis and the activation of cGAS-STING pathway. Ferroptosis not only directly suppresses prostate cancer but also triggers burst release of cancer-associated antigens and consequently initiates ICD against prostate cancer, where activated cGAS-STING pathway further amplifies the efficacy of ICD by generating interferon-β. Collectively, the intratumorally implanted micromagnets confer a durable EPR effect of PMZFNs, which eventually achieve the synergetic tumoricidal efficacy with negligible systemic toxicity.
研究领域:
肿瘤学
·
纳米医学
·
免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhao Li,Guixiang Liu,Hongwei Yang,Feng Liu,Shilin Yang,Bo Dai,Yong Ren,Fang Xu,Chunfeng Hu
In order to improve the matrix cracking of LiZn ferrite (LZF) ceramics during spark plasma sintering , fiber-reinforced LZF materials were prepared using silicon carbide nanofibers (SCFs) and alumina whiskers (AWs) as reinforcement phases. The effect of fiber reinforcement on the microstructure and mechanical, electrical, and magnetic properties of LZF was systematically studied. The results reveal that SCFs lead to an increase in grain size of SCF-reinforced LiZn ferrites (LZF-S) and a deterioration of grain morphology due to the transgranular behavior of SCFs. The increase in complex dielectric constant and dielectric loss, as well as the decrease in resistance of LZF-S, is due to the increase in Fe 2+ concentration in ceramics and low resistance of SCFs. AW-reinforced LiZn ferrites (LZF-A) show the opposite effect due to the high porosity caused by AWs and the high resistance of AWs. LZF-S exhibits high fiber/matrix bonding strength , which permits the transfer of the load from the matrix to the fiber to be more effective, leading to a high fracture toughness (K IC ) of 5.1 MPa m 1/2 . The bonding strength between fiber and matrix of LZF-A is low, but a large number of pores passivate the crack tip. At an SCF content of less than 2.5 wt%, the saturation magnetization (M s ) of LZF does not decrease obviously, but a small amount of AWs leads to a significant decrease in M s (pure LZF: 83 emu·g −1 ; 1.0 wt% SCFs: 80 emu·g −1 ; 1.0 wt% AWs: 62 emu·g −1 ), which can be ascribed to the partial substitution of Fe 3+ by nonmagnetic Al 3+ ions. When the content of reinforcement phases is 1 wt%, the ferroresonance linewidth increases significantly due to the high porosity caused by the secondary phases (pure LZF: 234 Oe; 1.0 wt% SCFs: 2161 Oe; 1.0 wt% AWs: 1020 Oe).
研究领域:
材料科学
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Fang Xu,Yan Yang,Yonggang Liu,Jing Yang,Yulong Liao,Xueying Wang,Xiaolei Shi,Jianbo Hu
Improving magnetic-dielectric properties of polymer materials, through filler of functional ceramics , provides feasibility to develop high-frequency flexible electronics. Poly-dimethylsiloxane (PDMS), an inert silicone with low elasticity modulus and high transparency, has been considered a promising candidate for flexible electronics. Current PDMS matrix used in high-frequency devices suffers from unsatisfactory properties due to very low dielectric constant. In this study, using ultrasonic stirring and vacuum-pumping process, we prepare a series of xCo 2 Z/PDMS (x = 2; 4; 6; 8; 10) composite films , which are consisted of PDMS matrix and different quantity of micro-sized ferrite particles. XRD pattern indicates that the obtained ferrite particles include Co 2 Z main phase and BaM second phase. We demonstrate that 4Co 2 Z/PDMS film has improved magnetic-dielectric properties at 800 MHz (μ' = 1.49; ε' = 4.54 tanδ μ = 0.058; tanδ ε = 0.008). Also, the film has high saturation magnetization ( σ s = 17.51 emu/g). Furthermore, SEM micrographs show that using ultrasonic stirring and fast curing, the micro-sized ferrite particles are well dispersed in PDMS matrix. Our study, which provides a simple method to improve high-frequency magnetic and dielectric properties of PDMS matrix, could pave the way for development of high-frequency flexible electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Ruixin Yu,Jianhui Zhao,Zhiwei Zhao,Fuyi Cui
In this paper, copper substituted zinc ferrite (ZCFO) catalyst with rich oxygen vacancies (OVs) was synthesized via a simple one pot sol-gel combustion method, and firstly used for peroxymonosulfate (PMS) activation to degrade a typical antibiotic ciprofloxacin (CIP). Only ∼15 min was required to achieve 96.6% of CIP degradation using ZCFO as the catalyst, and the pseudo-first-order reaction constant was about 95 times higher than that of conventional zinc ferrite (1.90 min −1 vs 0.02 min −1 ). ZCFO catalyst showed great stability and reusability based on the successive degradation cycles and could be easily recovered through magnetic separation. Besides, the effects of catalyst loading, PMS concentration, reaction temperature, initial solution pH, coexisting anions and humic acid (HA) on CIP degradation were systematically investigated. Radical quenching tests and electron paramagnetic resonance (EPR) revealed that sulfate radical ( SO 4 -. ), hydroxyl radical ( OH∙ ), superoxide radical ( O 2 ∙- ) and singlet oxygen ( 1 O 2 ) were involved in the ZCFO/PMS system, among which O 2 ∙- and 1 O 2 were the dominant reactive oxygen species (ROS). The excellent catalytic activity of ZCFO was ascribed to the dual active sites of Fe and Cu and large amount of OVs after Cu substitution, which was beneficial to generate ROS for CIP removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-9
·
IF 2.8
Li Wei,Dai Bo,Li Zhao,Yang Hongwei,Liu Guixiang,Xu Fang
A series of Ni x Zn 1− x Fe 2 O 4 ( NiZn, x = 0.15, 0.25, 0.35, 0.45, 0.65, 0.7, 0.8, 0.85) ferrites were prepared via a solid-phase sintering method. The microstructure, phase, and gyromagnetic properties of the NiZn samples were studied in depth. It was found that the lattice constants, density, and hardness of the samples gradually decreased with increasing Ni 2+ content. X-ray diffraction confirmed that all of the samples were in the spinel phase. Scanning electron microscopy indicated that the grain sizes were more uniformly distributed when x = 0.65. Raman analysis showed that the variation of Ni 2+ content affected the occupancy distribution of ferrite ions. The results indicated that Zn 2+ mainly occupied the A-site and that Ni 2+ mainly occupied the B-site. The coercivity ( H c ) of NiZn increased with increasing Ni 2+ content. Meanwhile, the saturation magnetization ( M s ) initially increased and then decreased. When x = 0.65, the total molecular magnetic moment started decreasing because of the decrease in the net A-site magnetic moment. The sample that had a composition of Ni 0.65 Zn 0.35 Fe 2 O 4 had the highest M s intensity with a value of 78.68 emu/g and a maximum value of 4 πM s = 4780 Gs.
研究领域:
材料科学
·
陶瓷
·
固体物理
·
磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
·
2014
·Vol. 122
·期 1430
·881-885
·
IF 0.846
Xiaobing ZHOU,Young-Hwan HAN,Jie ZHOU,Lu SHEN,Penchal Reddy MATLI,Jaehyung LEE,So Ik BAE,Dong-Yeon LEE,Qing HUANG
Ni-Carbon nanotube (CNT)-Ni0.5Zn0.5Fe2O4 multiphase composites were successfully prepared using microwave sintering (MWS) and spark plasma sintering (SPS) techniques. The obtained samples were characterized by scanning electron microscopy, electrical conductivity, and physical properties measurement system with vibrating sample magnetometer. The SPS prepared composites exhibited higher density, fine grain size, and to maintain favorable three-dimensional conductive network of CNTs compared with the microwave sintered (MWS) ones. Whether use MWS or SPS, both the density and the grain size are increasing with the CNT content increment. The increasing of density and grain size is the main contribution of the saturation magnetization increasing. In the composites of high content of CNTs (such as 5 wt %), the spinel structure of ferrite was totally destroyed, as indicated by a considerable decrease in the saturation magnetization. Interestingly, it is found that the Curie temperature increases with the increment of CNT content while the high saturation magnetization was maintained, which has implication that the multiphase ferrite composites will find application in a broad temperature range.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Jingwei Feng,Peng Nian,Lu Peng,Aiyong Zhang,Yabing Sun
Non-thermal plasma (NTP) combined with zinc ferrite-reduced graphene oxide (ZnFe 2 O 4 -rGO) nanocomposites were used for the degradation of aqueous methylparaben (MeP). ZnFe 2 O 4 -rGO nanocomposites were prepared using the hydrothermal method, with the structure and photoelectric properties of nanocomposites then characterized. The effects of discharge power, initial MeP concentration, initial pH, and air flow rate on MeP degradation efficiency were investigated, and the multi-catalytic mechanism and MeP degradation pathways were established. Results showed that ZnFe 2 O 4 -rGO nanocomposites with a 10%:90% mass ratio of GO:ZnFe 2 O 4 had an optimal catalytic effect. The MeP degradation efficiency of NTP combined with ZnFe 2 O 4 -rGO (10 wt%), was approximately 25% higher than that of NTP alone. Conditions favorable for MeP degradation included higher discharge power, lower MeP concentration, neutral pH value, and higher air flow rate. The degradation of MeP by NTP combined with ZnFe 2 O 4 -rGO nanocomposites followed pseudo-first-order kinetics. O 2 •- , •OH, H 2 O 2, and O 3 were found to play important roles in the MeP degradation, as part of the multi-catalytic mechanism of NTP combined with ZnFe 2 O 4 -rGO nanocomposites. MeP degradation pathways were proposed based on the degradation intermediates detected by gas chromatography mass spectrometry, including demethylation, hydroxylation, carboxylation , ring-opening, and mineralization reactions. The prepared ZnFe 2 O 4 -rGO nanocomposites provide an approach for improved contaminant degradation efficiency, with reduced energy consumption in the NTP process.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2018
·
IF 3.716
Shujun Xia,Zhixiong Cai,Jing Dong,Shuya Wang,Yiru Wang,Huaizhi Kang,Xi Chen
In this study, porous ZnFe 2 O 4 /carbon, derived from Zn-Fe zeolitic imidazolate framework (Zn-Fe-ZIF), was employed as a novel sorbent for magnetic-assisted dispersive miniaturized solid phase extraction (M-DμSPE). The Zn-Fe-ZIF derived magnetic porous ZnFe 2 O 4 /carbon was easily prepared using a one-pot solvothermal method, and its morphology, structure and magnetic characteristics were evaluated via scanning electron microscopy, powder X-ray diffraction, Raman spectroscopy and vibrating sample magnetometry. The extraction ability of ZnFe 2 O 4 /carbon is evaluated by different kinds of compounds including organochlorine pesticides, pyrethroid insecticides, aldehydes, nerolidol, benzoic acid and sorbic acid. A M-DμSPE method was developed for the analysis of organochlorine pesticides. Several parameters affecting the extraction efficiency were systematically investigated. The calibration curves ranged from 0.05 to 100 ng g −1 and the limits of detection were 0.005–0.3 ng g −1 . The intra-day and inter-day relative standard deviations were lower than 2.3 and 5.2%. The recoveries of spiked organochlorine pesticides were in the range of 86.1–109.4%.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 22
·2301869
·
IF 15.1
Zhiyong Jiang,Xiaodi Zhu,Zhiyu Wang,Wei Liu,Wensheng Yan,Kevin Sivula,Jun Bao
The structural properties of octahedral sites (B Oh ) in spinel oxides (AB 2 O 4 ) play vital roles in the electrochemical performance of oxygen-related reactions. However, the precise manipulation of AB 2 O 4 remains challenging due to the complexity of their crystal structure. Here, a simple and versatile molten-salt-mediated strategy is reported to introduce Ni 2+ in B oh sites intentionally on the surface of zinc ferrite (ZnFe 2 O 4 , ZFO) to promote the active sites for photoelectrochemical (PEC) water splitting. The as-created photoanode (ZFO-MSNi) shows a remarkable cathodic shift of ≈ 450 mV (turn-on voltage of ≈ 0.6 V RHE ) as well as three times the 1-sun photocurrent density at 1.23 V RHE for PEC water oxidation in comparison with bare ZFO. A comprehensive structural characterization clearly reveals the local structure of the introduced Ni 2+ in ZFO-MSNi. Fewer surface trapping states are observed while the precisely introduced Ni 2+ and associated neighboring Fe (3- σ )+ (0< σ <1) sites unite in an edge-sharing octahedral configuration to function as Ni Fe dual active sites for PEC water oxidation. Moreover, open circuit potential measurements and rapid-scan voltammetry investigation give further insight into the enhanced PEC performance. Overall, this work displays a versatile strategy to regulate the surface active sites of photoelectrodes for increasing performance in PEC solar energy conversion systems.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）