COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Jing Pan,Shaobin Li,Fengbo Li,Tingting Yu,Yupeng Liu,Li Zhang,Lin Ma,Ming Sun,Xuefeng Tian
Metal-organic frameworks (MOFs)-based derivatives provide a flexible platform for constructing high performance supercapacitors as electrode materials. Herein, a novel NiFe 2 O 4 /NiCo 2 O 4 /GO composites has been successfully prepared by dual-MOF as precursor. The NiFe 2 O 4 /NiCo 2 O 4 /GO composite formed a special structural morphology providing a large surface area. The composite electrode material exhibited an excellent specific capacity of 661.6 C/g (1470 F/g) at 1 A/g, excellent rate capability (from 1 to 20 A/g the specific capacity decreases about 38 %) and outstanding long cyclic life (89.9 % capacity retention after 3000 cycles). Moreover, an asymmetric supercapacitor was composed of NiFe 2 O 4 /NiCo 2 O 4 /GO and activated carbon as positive electrode and negative electrode, respectively. Meanwhile, ASC exhibited a specific capacity of 373.3 C/g at 1A/g in a potential range from 0 to 1.45 V, it showed the maximum energy density of ASC equal to 109 Wh kg −1 at a power density of 1051.17 W kg −1 . In addition, the NiFe 2 O 4 /NiCo 2 O 4 /GO//AC has an outstanding cycling stability (90.7 % capacitance retention after 1000 cycles), which makes it a potential application for in the field of energy storage-conversion application.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 44
·25932-25941
·
IF 3.049
Ailing Feng,Mingliang Ma,Zirui Jia,Meng Zhang,Guanglei Wu
In this work, a novel CF@NiFe2O4 composite coated with phytic acid-doped polyaniline (CF@NiFe2O4@p-PANI) was facilely synthesized. First, a typical solvothermal reaction was applied to obtain the CF@NiFe2O4 composite, and then the phytic acid-doped polyaniline was grown in situ on the surface of the CF@NiFe2O4 composite. The morphological structure, chemical composition, and surface functional group distribution of this hybrid were systematically evaluated. The magnetic saturation (Ms) value of the hybrid is 29.9 emu g−1, which represents an improvement in the magnetic loss. According to its reflection loss curve, the hybrid exhibits a superior EM wave absorption capacity, with a minimum reflection loss value and effective absorbing bandwidth of −46 dB when the sample thickness is 2.9 mm, and an effective absorption bandwidth of 5 GHz when the sample thickness is 1.5 mm. The excellent performance of this hybrid can mainly be attributed to its ideal matching of magnetic loss and dielectric loss, interfacial polarizations, eddy current loss and interface relaxation. This new material has the potential to be a superior electromagnetic wave absorber or applied as a functional filler to modify resin matrices.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Lina Jia,Gaohui Du,Di Han,Yunting Wang,Youqing Wang,Huayu Li,Wenqi Zhao,Shixian Chen,Miao Zhang,Qingmei Su,Bingshe Xu
Graphical P-doped NiFe 2 O 4 nanoparticles/N-doped carbon nanotubes are prepared via a hydrothermal method followed by phosphorization. The CNTs greatly enhance the electron transfer rate and the P-doping effectively modulates the charge distribution around Ni and Fe atoms, optimizes the energy barriers of adsorption of intermediates, urea and water dissociation, thereby accelerating the kinetics of water splitting and urea electrolysis. The design and construction of highly efficient electrocatalysts for overall water splitting and urea electrolysis are significantly important for promoting energy conversion and realizing green hydrogen production. In this work, we constructed a multi-phase heterojunction through a simple hydrothermal and phosphorization process. The P-doped NiFe 2 O 4 (P-NiFe 2 O 4 ) nanoparticles were uniformly anchored on the bamboo-like N-doped carbon nanotubes (NCNTs) grown via a NiFe-alloy autocatalysis. The electronic structure and coordination environment of active species were optimized by the synergistic action of P doping, well-dispersed ultrafine NiFe 2 O 4 , and NCNTs matrix with good conductivity, enhancing their quantity and activity for electrocatalysis. Consequently, the P-NiFe 2 O 4 /NCNTs/NiFe exhibits excellent HER and OER activities with an overpotential of 111 and 266 mV at 10 mA cm −2 in 1 M KOH, respectively. The symmetrical overall water-splitting cell using P-NiFe 2 O 4 /NCNTs/NiFe as both anode and cathode delivers 10 mA cm −2 at a voltage of 1.604 V in 1 M KOH. Notably, the two-electrode cell requires a low voltage of 1.467 V to achieve a current density of 10 mA cm − 2 in 1 M KOH solution with 0.6 M urea. This designed catalysts display outstanding reaction kinetics and catalytic stability. This work provides useful guidance for applying transition metal-based catalysts for hydrogen production.
研究领域:
材料科学
·
电化学
·
催化
·
能源转换
·
氢气生产
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 22
·8851-8859
·
IF 8.262
Muhammad Sufyan Javed,Cuiling Zhang,Lin Chen,Yi Xi,Chenguo Hu
Binary metal oxides have been considered as promising electrode materials for high performance pseudocapacitors because they offer higher electrochemical activity than mono metal oxides. The rational design of binder free electrode architecture is an efficient solution to the further enhancement of the performance of electrochemical supercapacitors. Herein, we report the synthesis of a hierarchical mesoporous NiFe2O4 (NFO) nanocone forest directly growing on carbon textile with ultra-high surface area by the hydrothermal method. The NiFe2O4 nanocone forest on carbon textile (NFO-CT) was used as a binder free electrode that exhibited the high capacitance of 697 F g−1 at a scan rate of 5 mV s−1 and was further used for the fabrication of a symmetric solid state supercapacitor. The open space between hierarchical nanocones allows easy diffusion for electrolyte ions and the carbon textile ensures fast electron transfer that leads to the remarkable electrochemical performance. The NFO-CT solid state supercapacitor exhibited the high capacitance of 584 F g−1 at a scan rate of 5 mV s−1 and 93.57% capacitance retention after 10 000 cycles with the advantages of being light weight, thin and having good flexibility. A high energy density of 54.9 W h kg−1 at a power density of 300 W kg−1 was achieved, indicating the excellent energy storage features. Furthermore, three charged supercapacitors in series can light 4 red colored LEDs (2 V, 15 mA) for 2 min.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 47
·4938-4946
·
IF 3.532
Wanliang Liao,Yang Xu,Dingyun Li,Yixing Ye,Yuhan Ning,Weiping Wang,Ai-jun Wang
In this study, a functionalized magnetic covalent organic framework (NiFe2O4@TAPB-TPA) was fabricated with NiFe2O4 nanoparticles as the magnetic core, and 1,3,5-tris(4-aminophenyl)benzene (TAPB) and terephthalaldehyde (TPA) as building blocks by a facile room temperature strategy. Benefitting from the π–π stacking and hydrogen bond interaction, NiFe2O4@TAPB-TPA showed great potential as a magnetic adsorbent for the extraction of tetracyclines (TCs). Under optimal conditions, good linearities (R2 > 0.9990) were obtained between the peak area and TC concentration in the range of 1–500 μg L−1 with limits of detection ranging from 0.09 to 0.26 μg L−1. The intra-day and inter-day relative standard deviations were less than 2.2% and 4.7%, respectively. The established method was successfully applied for the determination of TCs in diverse environmental water samples with satisfactory recoveries in the range of 91.6–102.7%. In addition, NiFe2O4@TAPB-TPA showed good reusability with the recoveries for TCs higher than 73.1% after nine recycles, indicating potential application of NiFe2O4@TAPB-TPA as an ideal adsorbent for the enrichment of TCs.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Hongbo Zhang,Yiting Zhao,Zhenfeng Cheng,Jingyun Jiang,Jianwei Fu,Qun Xu
To meet the industrial demand for overall water splitting, oxygen evolution reaction (OER) electrocatalysts with low-cost, highly effective, and durable properties are urgently required. Herein, a facile confined strategy is utilized to construct 2D NiFe 2 O 4 /Ni(OH) 2 heterostructures-based self-supporting electrode with surface-interfacial coengineering, in which abundant and ultrastable interfaces are developed. Under the high molar ratio of Ni/Fe, both spinel oxide and hydroxides phases are formed simultaneously to obtain 2D NiFe 2 O 4 /Ni(OH) 2 heterostructure. The in-depth analysis indicates that the NiFe 2 O 4 /Ni(OH) 2 interface displays strong electronic interactions and triggers the formation of crystalline-amorphous coexisting catalytic active NiOOH. Meanwhile, the stable catalyst-collector interface favors the electron transfer and oxygen molecules transport. The resultant 2D NiFe 2 O 4 /Ni(OH) 2 @CP electrode exhibits superior OER performance, including a low overpotential of 389 mV and a long operating time of 12 h at 1 A cm −2 . This work paves a novel method for fabricating efficient and low-cost electrocatalysts for electrochemical conversation devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Peng Zhao,Haorong Sun,Feixue Gao,Long Yu,Kangle Shang,Ming Fang,Bin Ma,Xiaoli Tan,Suhua Wang,Xiangke Wang
Rapid and accurate detection of nitrite in the aqueous environment is extremely important for ecological safety and human health. In this paper, the Raman detection of nitrite by a NiFe 2 O 4 @Ag sensor in water is enhanced by an extra magnetic field collaborated with surface plasma. Most importantly, it is demonstrated that the magnetic field enhances the Raman peak intensity through not only the effect of magnetic aggregation but also the magnetic field-induced dielectric polarization effect. In this way, the NO 2 − can be detected in a wide linear range from 10 −8 to 10 −3 mol L −1 , and the limit of detection (LOD) can reach as low as 1.25 × 10 −9 mol L −1 , which is 5.69 times lower than that in the absence of an external magnetic field. Similarly, the sensitivity under the magnetic field is 2.65 times that without the magnetic field. In addition, the sensor also shows superior detection ability to NO 2 − in real samples. Given the excellent capability of the magnetic field-enhanced Raman spectra, the reported strategy offers new thoughts on how to enhance the detection ability by an external magnetic field and show the great application potential in real water bodies.
研究领域:
分析化学
·
环境科学
·
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Shifeng Li,Tiankuo Zang,Xiaoyun Yang,Min Xiao,Haibo Wang,Shuhua Yao,Zhongliang Shi
The utilization of waste melamine-formaldehyde foam to produce value-added carbon foam has been identified as a promising approach to polymer recycling. Nickel-Iron layered double hydroxides (NiFe-LDHs) and its complex oxides (NiFe 2 O 4 ) were synthesized in this study through a hydrothermal method, growing in situ on the above-mentioned carbon foam substrate. Comparative analysis revealed that CF@NiFe 2 O 4 exhibited superior removal efficiency compared to CF@NiFe-LDHs. Furthermore, arsenate adsorption on CF@NiFe-LDHs and CF@NiFe 2 O 4 conformed more to the pseudo-second-order model; meanwhile, the isothermal adsorption characteristic fitted the Langmuir isothermal model better. The negative ΔG (free energy changes, <−37.68 kJ/mol) and positive ΔH (enthalpy change, 7.64 kJ/mol) indicate that it is spontaneous and endothermic for As(V) to adsorb on CF@NiFe 2 O 4 . Potential mechanisms such as surface complexation, electrostatic interaction, and hydrogen bonding were suggested. This innovative approach offers a novel method for utilizing LDHs-based adsorption materials and recycling waste polymers.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Jiaxin Li,Chongchao Yao,Bo Song,Zhihao Zhang,Andreas Libonati Brock,Stefan Trapp,Jing Zhang
Microbial fuel cells (MFCs) have great promise for power generation by oxidizing organic wastewater, yet the challenge to realize high efficiency in simultaneous energy production and resource recovery remains. In this study, we designed a novel MFC anode by synthesizing S-doped NiFe 2 O 4 nanosheet arrays on carbon cloth (S10-NiFe 2 O 4 @CC) to build a three-dimensional (3D) hierarchically porous structure, with the aim to regulate the microbial community of sulfur-cycling microbes in order to enhance power production and elemental sulfur (S 0 ) recovery. The S10-NiFe 2 O 4 @CC anode obtained a faster start-up time of 2 d and the highest power density of 4.5 W/m 2 in acetate-fed and mixed bacteria-based MFCs. More importantly, sulfide removal efficiency (98.3 %) (initial concentration of 50 mg/L S 2− ) could be achieved within 3 d and sulfur (S 8 ) could be produced. Microbial community analysis revealed that the S10-NiFe 2 O 4 @CC anode markedly enriched sulfur-oxidizing bacteria (SOB) and promoted enrichment of SOB and sulfate-reducing bacteria (SRB) in the bulk solution as well, leading to the enhancement of power generation and S 0 recovery. This study shows how carefully designing and optimizing the composition and structure of the anode can lead to the enrichment of a multifunctional microbiota with excellent potential for sulfide removal and resource recovery.
研究领域:
环境工程
·
微生物学
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Wei Zhang,Peipei Zhou,Wei Liu,Huili Wang,Xuedong Wang
Owing to matrix complexity, the development of green and convenient pretreatment methods is crucial for routine monitoring of organic contaminants in meat samples. Dicationic ionic liquids (DILs) possess two active centers, thus resulting in superior physicochemical properties over monocationic species. Herein, the hydrophilic DILs and in-situ metathesis reaction salt were introduced into NiFe 2 O 4 -based magnetic effervescent tablets for enhancing adsorption/extraction of five typical polycyclic aromatic hydrocarbons (PAHs) in meats. Also, the synthesized NiFe 2 O 4 nanoparticles displayed larger specific surface area than others (CoFe 2 O 4 , Fe 3 O 4 and ZnFe 2 O 4 ), thereby supplying higher adsorption capacity for PAHs. The integration of DILs with NiFe 2 O 4 into magnetic effervescent tablets realized highly efficient adsorption/extraction, rapid magnetic separation/retrieval and CO 2 -induced vigorous dispersion into one synchronous step. After hydrolysis of the ground meat samples using 10 μM KOH, the filtered solution was diluted and subjected to magnetic effervescent tablet-assisted microextraction procedures. Optimized experimental variables were as follows: an effervescent tablet containing 0.7 g Na 2 CO 3 and NaH 2 PO 4 with molar ratio of 1:2; 60 mg [C 4 (MIM) 2 ]Br 2 ; 20 mg NiFe 2 O 4 ; 45 mg Na[N(CN) 2 ] and 500 μL toluene as elution solvent. The effervescent reaction-enhanced microextraction was combined with high performance liquid chromatography and fluorescence detection, rendering limits of detection as low as 0.01–0.07 μg kg −1 with high recoveries (82.3–104.7%) for five PAHs in raw, boiled, charcoal-grilled and smoked meats. To the best of our knowledge, this is the first report on the additive action between DILs and NiFe 2 O 4 in an effervescent reaction-enhanced microextraction, showing great analytical potential in meat matrices.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2018
·Vol. 28
·期 1
·423-430
·
IF 1.34
Wang Bin,Du Jinjing,Gao Shoukun,Fang Zhao,Zhu Jun,Li Linbo
NiFe 2 O 4 /nano-TiN ceramics were fabricated by a two-step cold-pressing sintering process. Effect of sintering atmosphere (air, nitrogen, argon) on the synthesis process of NiFe 2 O 4 /nano-TiN ceramics was investigated. The DSC-TG and XRD analysis results indicated that besides principal phases of NiO and NiFe 2 O 4 , new-phase Ni 3 TiO 5 formed in the sintered ceramics under the three sintering atmospheres, and metallic phase including iron and nickel appeared in the sintered samples with inert gas (nitrogen, argon) sintering condition. Microstructure analysis results showed that considerable quantity of micropores appeared in the ceramic samples sintered under inert gases (argon, nitrogen), but lower porosity (3.0, 3.6%) and higher densities (4.78 g/cm 3 , 4.51 g/cm 3 ) can be obtained, comparing to the both values (14.4%, 4.17 g/cm 3 ) for the ceramic samples sintered under air atmosphere. Besides, the average bending strength and elastic modulus of the samples sintered under argon is 113.75 MPa and 7.13GPa, which is higher than that of 75.12 MPa, 5.42GPa and 91.96 MPa, 6.26GPa for the samples synthesized under air and nitrogen, separately. When changing sintering atmosphere from air to inert gases (argon, nitrogen), the fracture model of the 4 wt.%nano-TiN/NiFe 2 O 4 ceramics synthesized at 1400 °C for 4 h transformed from intergranular fracture to intergranular-transgranular fracture.
研究领域:
材料科学
·
陶瓷工程
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 9
·1-8
·
IF 5.479
Fang Dandan,Zhang Shupei,Dai Hong,Li Xiuhua,Hong Zhensheng,Lin Yanyu
An ultrasensitive competitive-type electrochemiluminescence immunoassay for the mycotoxin zearalenone is described. The method is based on the use of (a) a mimotope peptide that was selected from a phage displayed peptide library and used to substitute ZEN for designing the competitive assay; (b) NiFe 2 O 4 nanotubes with large specific surface area loaded with the ECL probe Ru(bpy) 3 2+ ; and (c) poly(vinylpyrrolidone) (PVP)-assisted synthesis of TiO 2 mesocrystals that acts as the sensing platform and support for antibody immobilization. Under the optimized conditions and at an ECL working potential of 1.1 V, a linear response is found for ZEN in the 0.1 to 1.0 × 10 −5 ng·mL −1 concentration range with a detection limit as low as 3.3 fg·mL −1 .
An ultrasensitive competitive-type electrochemiluminescence (ECL) immunosensor based on mimotope peptide was constructed for the detection of Zearalenone.
研究领域:
食品科学
·
分析化学
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）