JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yang Sun,Kexin Wei,Fan Yang,Siyuan Sun,Junpu An,Yue Zhang,Haojia Zhong,Conghan Zhang,Meiyi Shan,Hongchen Liu,Yongfeng Li
Nickel-based spinel catalysts for bifunctional industrial overall water splitting still suffer from critical performance limitations. In this study, WO 4 2− doped NiFe 2 O 4 spinel materials with a self-supported structure on Ni foam were synthesized via hydrothermal and calcination processes. The optimized catalyst PW-NiFe 2 O 4 exhibits remarkable hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance, affording overpotentials of 202 mV (HER) and 248 mV (OER) at 100 mA/cm 2 , corresponding to 1.31-fold and 1.12-fold enhancements relative to the pristine NiFe 2 O 4 electrode. Moreover, an activity of 340 mA/cm 2 at 1.85 V was delivered by the material, and stable operation at 100 mA/cm 2 for 120 h was maintained in a simulated anion exchange membrane water electrolysis (AEMWE), outperforming most reported catalysts of the same type. Experimental results reveal that the introduction of high-valent W can elevate the valence state of the Ni species, and it is also verified by theoretical calculations that the O 2p band center is upshifted, indicating an enhancement in the covalent nature of Ni-O bonds. These results confirm the triggering of an efficient lattice oxygen mechanism (LOM) during the OER. Furthermore, the adsorption energies of water and the H* intermediate on Ni sites are effectively modulated by the incorporation of W, which facilitates the intrinsic activity in HER. This study presents a promising strategy for the development of bifunctional spinel-based catalysts specifically designed for use in AEMWE systems.
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DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 8
·1347
·
IF 5.719
Wen Jiang,Lingling Dong,Shuanghui Liu,Shuangshuang Zhao,Kairu Han,Weimin Zhang,Kefeng Pan,Lipeng Zhang
Lithium-sulfur batteries exhibit great potential as one of the most promising energy storage devices due to their high theoretical energy density and specific capacity. However, the shuttle effect of the soluble polysulfide intermediates could lead to a severe self-discharge effect that hinders the development of lithium-sulfur batteries. In this paper, a battery separator has been prepared based on NiFe2O4/Ketjen Black (KB) modification by a simple method to solve the shuttle effect and improve the battery performance. The as-modified separator with the combination of small-size KB and NiFe2O4nanoparticles can effectively use the physical and chemical double-layer adsorption to prevent polysulfide from the shuttle. Moreover, it can give full play to its catalytic effect to improve the conversion efficiency of polysulfide and activate the dead sulfur. The results show that the NiFe2O4/KB-modified separator battery still maintains a discharge capacity of 406.27 mAh/g after 1000 stable cycles at a high current density of 1 C. Furthermore, the coulombic efficiency remains at 99%, and the average capacity attenuation per cycle is only 0.051%. This simple and effective method can significantly improve the application capacity of lithium-sulfur batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xinyi Zhang,Yingjie Gao,Yunhe Li,Yuerong Zhou,Haiyan Ma,Jiangwei Shang,Xiuwen Cheng
As a promising method, coupled advanced oxidation processes (AOPs) based on the photocatalytic and peroxymonosulfate (PMS) activation has attracted extensive attention to degrade organic pollutants . Therefore, heterogeneous photosensitive PMS activators with high activity and excellent stability played a crucial role in this process need to be developed. In this study, magnetic NiFe 2 O 4 /CuS composite powder was successfully synthesized based on a simple solvothermal method combined with co-precipitation method, which was applied in the catalytic degradation process of lomefloxacin (LOM). The mass ratio of ingredients was optimized, while the physical and chemical properties of as-prepared samples were analyzed though a series of characterizations. In addition, under the illumination of simulated sunlight, 88.1% of LOM could be eliminated over 40 min with the addition of 0.8 g L −1 PMS and 0.6 g L −1 NiFe 2 O 4 /CuS (1:5) at pH 5.86 (unadjusted). Radical scavenging experiments and EPR test analysis were carried out to prove the contribution of different active species in the degradation process. Besides, the possible degradation mechanism was proposed. The intermediate products produced during the degradation of LOM were detected by the high-performance liquid chromatography/mass spectrometry (HPLC/MS), and the possible degradation pathways were deduced. Finally, the recyclability of NiFe 2 O 4 /CuS and the stability of the new degradation system were elucidated.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Ying Li,Yanyan Wu,Hongru Hao,Mengke Yuan,Zhe Lv,Lingling Xu,Bo Wei
Oxygen evolution reaction (OER) is a key step for electrochemical water splitting and understanding the surface reconstruction of OER pre-catalysts is of vital importance. Herein, hybrid Ni 5 P 4 @FeP nanosheet arrays were evaluated as promising OER pre-catalysts. The dynamic surface evolution was probed by in situ Raman spectroscopy, which revealed that Ni 5 P 4 @FeP was rapidly reconstructed to NiFe 2 O 4 during the anodic scan. The structural instability of amorphous NiFe 2 O 4 led to partial reconstitution to Ni/FeOOH at high oxidation potentials. As-formed Ni/FeOOH@NiFe 2 O 4 hybrid with high structural reversibility was established as a truly active species, which exhibited excellent alkaline OER performance with a low overpotential of 205 and 242 mV under current densities of 10 and 100 mA cm −2 , respectively. This work provides a facile strategy to in situ construct an amorphous spinel/oxyhydroxide hybrid structure using electrochemical activation that holds strong promise for potential application in electrochemical water splitting and related energy devices.
研究领域:
电化学
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材料科学
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催化
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产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 3
·1668-1678
·
IF 3.361
Dechao Chen,Sai Ma,Xiaofan Zhang,Xuedong Wang,Ming Gao,Jieyi Li,Huili Wang
The reported ionic liquid (IL)-based magnetic effervescent tablets are a result of direct addition of ILs and magnetic nanoparticles (MNPs). In effervescent reaction-enhanced microextraction procedures, the dissociation between ILs and MNPs easily leads to loss of ILs due to aqueous solubility, thereby decreasing the extraction efficiency. Herein, we attached a hydrophilic IL ([BMIM]Br) onto the surface of NiFe2O4@SiO2@polyaniline (NiFe2O4@SiO2@PANI-IL) to prepare novel core–shell-like multi-layer nanocomposites. Magnetic effervescent tablets were composed of Na2CO3 as an alkaline source, tartaric acid as an acidic source and as-synthesized nanocomposites as an extractant. The nanocomposites were used in an effervescent reaction-enhanced magnetic solid-phase extraction (ERMSE) for the extraction of four organophosphorus pesticides (OPPs) in fruit juices prior to HPLC-DAD detection. Under optimized conditions, this method provided low limits of detection (0.06–0.17 μg L−1), high recoveries (80.6–97.3%) and excellent precision (1.1–5.2%) for OPP quantification in five fruit juices. Notably, the three-layer core–shell nanocomposites were efficiently recycled for at least eight extraction cycles with a recovery loss of <10%. The novelty of this study lies in: (1) for the first time, the ILs-based hybrid magnetic nanocomposites were prepared with appropriate pore size/volume and more active sites for OPPs; (2) the combination of the nanocomposites with effervescent tablets realizes rapid dispersion of CO2 bubbles, and convenient magnetic separation/collection into one synchronous step; and (3) due to there being no requirement of electrical power, it is feasible for use in field conditions. Thus, the ERMSE method has excellent potential for conventional monitoring of trace-level OPPs in complex fruit juice matrices.
研究领域:
分析化学
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环境科学
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食品科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jingyu Shi,Feng Gui,Ke Huang,Xuan Zhou,Xue Li,Liwen Yang,Jianyu Huang,Gang Wang,Guobao Xu
Two-dimensional materials (2D Ms) as fillers have been applied in polyethylene oxide (PEO)-based electrolyte to enhance the low ionic conductivity and poor interface compatibility. However, the randomly dispersed fillers in PEO matrix result in anisotropy of Li + transportation and insufficent ionic conductivity. Herein, NiFe 2 O 4 (NFO) nanosheets are firstly introduced in polymer matrix to form vertically aligned NFO-PEO (ANFO-PEO) composite solid-state electrolytes (CSEs) through magnetic field-assisted alignment strategy. The vertically aligned NFO/PEO interface in CSEs can construct oriented Li + transport channels and maximize the utilization of high in-plane conductivity. Meanwhile, the NFO nanosheets with abundant oxygen vacancies could effectively anchor TFSI − to promote the dissociation of Li salts. Furthermore, the optimized Li + transport flux in CSEs enables homogeneous Li deposition and effectively mitigates the growth of dendrites. Owing to the synergistic effects, the ANFO-PEO CSEs exhibit high ionic conductivity (9.16 × 10 −4 S cm −1 at 60 °C) and stable potential window up to 5.0 V vs Li/Li + . Therefore, LiFePO 4 in the full cell and pouch cell with ANFO-PEO CSEs could deliver excellent cycling performance (92.78 % capacity retention after 1000 cycles at 0.5C; 96.88 % capacity retention after 105 cycles at 0.1C).
研究领域:
材料科学
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能源存储
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产品关联
DOI
PubMed
高影响因子
Nano Research
·
2021
·Vol. 15
·期 1
·255-263
·
IF 8.897
Xue Shuqing,Wu Guanhong,Li Mingzhong,Liu Zihan,Deng Yuwei,Han Wenqian,Lv Xuanyu,Wan Siyu,Xi Xiangyun,Yang Dong,Dong Angang
Heterostructures composed of two-dimensional (2D) nanosheets and zero-dimensional (0D) nanoparticles (NPs) have attracted increasing attention because of the synergy arising from the coupling interactions between the two mixed-dimensional components. Despite recent advances, it remains a challenge to fabricate 2D/0D heterostructures with clean and accessible surfaces, which is highly desirable for the diversity of catalytic, sensing, and energy storage applications. Herein, we report a generalized methodology that enables the facile assembly of sandwich-like 0D/2D/0D heterostructures with facilitated mass-transport channels and exposed surface active sites. A ligand-exchange strategy with HBF 4 is employed to strip off the surface-coating ligands of colloidal NPs, rendering them positively charged and dispersible in polar solvents. This allows subsequent electrostatic assembly of NPs with oppositely charged 2D nanosheets to afford sandwich-like 0D/2D/0D heterostructures. The barely covered surfaces and the advantageous architectures of such sandwich-like 0D/2D/0D heterostructures induce the desired synergistic effect, making them particularly suitable for electrochemical energy storage and conversion. We demonstrate this by employing MXene/NiFe 2 O 4 and MXene/Fe 3 O 4 heterostructures for high-performance electrocatalytic oxygen evolution and supercapacitors, respectively.
研究领域:
材料科学
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电化学
·
纳米技术
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jiashuai Zhu,Lele Zhang,Kang Li
In this work, NiO/NiFe 2 O 4 @Zn 0.76 Co 0.24 S nanocages (NCs) with core-shell type double heterostructures were synthesized using a core-shell design scheme. Among them, NiO/NiFe 2 O 4 cubic cores were obtained by calcination of Ni-Fe Prussian blue analogs (PBAs), and Zn-Co-like zeolitic imidazole frameworks (ZIFs) growed in situ around these cubic cores and were sulfided to obtain NiO/NiFe 2 O 4 @Zn 0.76 Co 0.24 S NCs. The composite has a large specific surface area of 249.66 m 2 g -1 due to the inherited structure of the two bimetallic organic frameworks. And there is a core-shell double heterogeneous synergy between the Zn 0.76 Co 0.24 S NCs and p-p heterostructured NiO/NiFe 2 O 4 , which makes the modified electrode exhibit superior electrochemical performance for Bromisoval (BVU). In addition, glutathione (GSH) was explored to significantly enhance the electrochemical activity of BVU by nucleophilic substitution binding of its own -SH with -Br on BVU, which greatly improved the sensitivity. Then, GSH was developed as a new functional monomer, and beta-cyclodextrin (β-CD) was selected as a secondary functional monomer, and molecularly imprinted polymer (MIP) of BVU was prepared by CV electropolymerization to achieve a specific recognition of BVU. An electrochemical sensor based on NiO/NiFe 2 O 4 @Zn 0.76 Co 0.24 S NCs and MIP was constructed to detect BVU by DPV. Under the optimal conditions, the oxidation peak current of BVU was linear over the concentration range of 0.006-3.5 μM, with the limits of detection (LOD) and quantification (LOQ) of 0.28 nm and 0.933 nm, respectively. The sensitivity reached 11.0303 μA·μM -1 ·cm -2 . The method has a wider linear range and lower detection limits compared to other assays for BVU. And the sensor showed excellent reproducibility, repeatability and stability and had been applied to the determination of BVU in human serum and cosmetics with satisfactory results.
研究领域:
材料科学
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分析化学
·
生物医学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Sheng Shen,Yu Fan,Bowen Lu,Cong Luo,Xiaoshan Li,Liqi Zhang
La promotes surface electron transfer in NiFe 2 O 4 to form La-Fe-O precursors. • In-situ LaFeO 3 perovskite scaffold physically confines and anchors active grains. • 20% La doping optimizes the synergy between active site exposure and stability. • Lattice reconstruction enables a high CO 2 conversion of 73% at 700 °C. • Stable CO 2 conversion above 97% over 30 h continuous operation. Catalytic hydrogenation of CO 2 to CO via the reverse water-gas shift (RWGS) reaction provides an attractive route for renewable hydrogen utilization and carbon recycling. NiFe 2 O 4 spinels are promising RWGS catalysts owing to abundant oxygen vacancies and excellent CO 2 activation capability. However, the reconstruction-induced aggregation of Fe-Ni active phases under reaction conditions severely limits durability. Herein, La modification regulates phase reconstruction, surface basicity, and oxygen environments. La-induced electron transfer promotes Ni reduction, modifies Fe-O coordination, and enriches defect-related and adsorbed oxygen species, enhancing CO 2 activation. Meanwhile, LaFeO 3 anchors Fe-Ni nanocrystals and suppresses FeO accumulation and sintering. Consequently, 20La 2 O 3 -NiFe 2 O 4 achieves 73.0% CO 2 conversion at 700 °C, and 2.33 times that of pristine NiFe 2 O 4 , while retaining approximately 97% of its initial conversion after 30 h. This work provides an effective strategy for active-phase stabilization, advancing the development of durable catalysts for efficient CO 2 hydrogenation. Download: Download high-res image (317KB) Download: Download full-size image
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高影响因子
ACS Omega
·
2021
·
IF 3.512
Huixue Yao,Xueer Ning,Hong Zhao,Aize Hao,Muhammad Ismail
In the present research work, gadolinium-doped nickel ferrite (NiFe2–xGdxO4, x = 0–0.1) thin films have been synthesized by a facile sol–gel approach. The structural, optical, and magnetic performances of Gd-doping on nickel ferrite films have been investigated. The X-ray diffraction pattern indicated a cubic spinel ferrite structure and that the lattice parameter increased, while the crystalline size decreased with increasing the Gd concentration. Scanning electron microscopy analysis indicated that Gd-doped thin films were dense and smooth. The optical band gap value of the as-prepared thin films increased with increasing the Gd concentration. It showed that Gd-doping endowed nickel ferrite thin films with much better saturation magnetization (278.53 emu/cc) and remnant magnetization (67.83 emu/cc) at an appropriate 0.05 Gd-doping concentration. In addition, our results also revealed that the saturation magnetization remarkably increased, then sharply decreased with increasing of Gd doping content, which is attributed to effects of Gd-doping, exchange interaction, and redistribution of cations. Moreover, X-ray photoelectron spectroscopy analysis exhibited the effect of Gd-doping substitution on exchange interaction and redistribution of cations at the octahedral site and tetrahedral site.
研究领域:
材料科学
·
磁性与磁性材料
·
薄膜技术
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纳米材料
·
固态化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Caicai Ran,Mang Lu,Linli Hou,Huanggen Yang,Limin Liu
Heterogeneous interface regulation acts a significant role in tailoring the intrinsic physicochemical property for achieving excellent photocatalytic H 2 evolution performance, which still faces a huge challenge. In this work, by comparing H 2 evolution property of various cadmium zinc sulphide (Cd x Zn 1−x S) solid solutions, 1-D Cd 0.9 Zn0 .1 S nanorods possessing the optimum photocatalytic H 2 evolution performance were obtained. Additionally, bimetallic metal organic framework (MOF)-derived NiFe 2 O 4 @C (NFO@C) microspheres with custom-built heterogeneous interface were successfully prepared via a solvothermal/pyrolysis strategy. Moreover, NFO@C microspheres were assembled on Cd 0.9 Zn0 .1 S surface to fabricate a series of NFO@C/Cd 0.9 Zn 0.1 S heterojunction photocatalysts with varied contents of NFO@C. The NFO@C/Cd 0.9 Zn 0.1 S heterojunction with a NFO@C content of 20 wt% (abbreviated as NC20) exhibited the highest H 2 production rate of 96.25 mmol g –1 h −1 , which was 3.8 times that of Cd 0.9 Zn 0.1 S. Under a light wavelength of 420 and 450 nm, the apparent quantum efficiency of NC20 reached 34.8 % and 65.1 %, respectively. The photocatalytic H 2 evolution activity of NC20 remained stable after the 16-h cycle experiment, whereas the severe photocorrosion of Cd 0.9 Zn 0.1 S was encountered. Furthermore, the easy recyclability of NC20 should not be overlooked. The results of a series of material characterization clearly demonstrate that the introduction of NFO@C could efficiently improve light absorption and the photoinduced carrier separation capability of the composite photocatalysts. This study not only opens up a facile and controllable preparation way for the synthesis of heterojunction structures with tailored heterogeneous interfaces, but also offers a new sight to ameliorate the H 2 evolution capability, stability and recyclability of Cd x Zn 1−x S solid solutions.
研究领域:
材料科学
·
光催化
·
氢能
·
纳米材料
·
异质结工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yuchen Li,Zhen Chen,Guoxiong Zhan,Bingling Yuan,Lidong Wang,Junhua Li
Catalytic amine-based solvent regeneration with solid acid is a feasible option for reducing energy consumption of CO 2 capture, but facing crucial challenges on designing material structures and understanding reaction mechanisms. Herein, we cover the nanoscale NiFe 2 O 4 cluster with covalent organic frameworks (COFs), to prepare solid acid catalysts. The pristine chemical bonds of Ni(Fe)-O and Ni(Fe)-Ni(Fe) are substituted by Ni(Fe)-N and Ni(Fe)-N-Ni(Fe) by targeting the anchoring of NiFe 2 O 4 cluster over COFs. The created coordination state stimulates the production of Brønsted acid sites. The obtained nanomaterials achieve a considerable improvement in CO 2 desorption of up to 290.1 mmol/(min·g) at 88 °C for spent monoethanolamine (MEA) solvent, representing a substantial increase of 540% relative to traditional thermal desorption. Consequently, the energy consumption of MEA generation is reduced by approximately 58%. Intermediate species (HCO 3− , CO 3 2− , and RNHCOO − ) and reaction pathways are established by combining operando Raman spectroscopy and ex situ 13 C NMR spectrum measurements. Theoretical calculations are performed to clarify the transformation mechanism of the acid sites around Ni/Fe atoms and its intrinsic role in the adsorption equilibrium of solvent regeneration.
研究领域:
环境科学
·
化学工程
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）