ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Ruyan Xie,Shuzhe Zhang,Yanhua Song,Xiaozhen Zhang,Shihou Sheng,Haifeng Zou
The optical properties of quantum dots are significantly influenced by photoactivation. However, the progress in the development of photoactivation carbon dot (CDs) is still stagnant. Herein, a method for preparing photoactivated CDs/NiFe 2 O 4 by introducing affluent defects onto the surface of CDs through modification with NiFe 2 O 4 , extremely filling the gap of photoactivated CDs is proposed. Interestingly, a fantastic fluorescence detection strategy in a unique “OFF-ON-OFF” mode, combined with Ag + -assisted fluorescence enhancement, to establish a dual-channel regulation mechanism for ultra-sensitive detection of Hg 2+ is first proposed. By increasing surface traps and non-radiative recombination, defect-induced manipulation on the surface of CDs creates favorable conditions for enhancing photoactivation capacity. Unexpectedly, the CDs/NiFe 2 O 4 shows a 25-fold enhancement in fluorescence intensity after exposure to UV-lamp. Compared to CDs/NiFe 2 O 4 , Ag + -assisted photoactivation CDs/NiFe 2 O 4 exhibits superior selectivity and sensitivity for Hg 2+ detection, with low detection limits of 0.7 nM. Moreover, TiO 2 @CDs/NiFe 2 O 4 catalyst is successfully prepared by anchoring CDs/NiFe 2 O 4 onto the surface of TiO 2 , which demonstrates efficient degradation of tetracycline within 90 min under visible light irradiation, with a degradation rate of 98.3%. This work first provides a novel defects modification strategy for developing highly active photoactivated CDs technology that is significant for future environmentally sensitive applications.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
·
IF 14.3
Yuelin Lv,Hui Zhao,Jieyun Zhang,Tong Gao,Qiang Zhuang,Jie Kong,Lixin Chen
Gel-based electromagnetic wave (EMW) absorbing materials demonstrate substantial potential in wearable electronics and soft robotics. However, it remains challenging to simultaneously achieve superior impedance matching and efficient electromagnetic energy dissipation through benefiting potential synergies among multifunctional attributes. In this work, a novel salting-out organohydrogel containing 0.5 wt.% NiFe 2 O 4 /CNTs was successfully synthesized, with a three-dimensional (3D) porous cross-linked structure and multiple heterointerfaces, which dramatically boosts the interfacial effects and improves the polarization loss. Meanwhile, dense polymer networks impose steric hindrance that elevates the energy barrier for molecular reorientation and ionic transport resistance, synergistically amplifying both polarization and ohmic conductive losses. Taking advantage of the features of considerable multiple polarization loss and optimized impedance matching, the as-prepared S-0.5 NiFe 2 O 4 /CNTs organohydrogel has achieved exceptional EMW absorption performance (the minimum reflection loss RL = −48.31 dB and the maximum adequate absorption bandwidth EAB reaches 6.16 GHz). This as-prepared organohydrogel exhibits optimal radar cross-section (RCS) reduction performance with a maximum value of 21.63 dB m 2 . Such excellent electromagnetic characteristics deepen the mechanistic understanding of internal attenuation processes in gel-based EMW absorbers and provide novel design principles for advancing next-generation flexible electronics.
研究领域:
材料科学
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电磁学
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纳米技术
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2025
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IF 17.7
Jiangyu Tang,Xiao Wang,Yunfa Wang,Min Shi,Peng Huo,Jianxiang Wu,Qiaoxia Li,Qunjie Xu
The oxygen evolution reaction (OER) serves as a fundamental half–reaction in the electrolysis of water for hydrogen production, which is restricted by the sluggish OER reaction kinetics and unable to be practically applied. The traditional lattice oxygen oxidation mechanism (LOM) offers an advantageous route by circumventing the formation of M-OOH* in the adsorption evolution mechanism (AEM), thus enhancing the reaction kinetics of the OER but resulting in possible structural destabilization due to the decreased M–O bond order. Fortunately, the asymmetry of tetrahedral and octahedral sites in transition metal spinel oxides permits the existence of non-bonding oxygen, which could be activated by rational band structure design for direct O-O coupling, where the M–O bond maintains its initial bond order. Here, non-bonding oxygen was introduced into NiFe 2 O 4 via annealing in an oxygen-deficient atmosphere. Then, in-situ grown sulfate species on octahedral nickel sites significantly improved the reactivity of the non-bonding oxygen electrons, thereby facilitating the transformation of the redox center from metal to oxygen. LOM based on non-bonding oxygen (LOM NB ) was successfully activated within NiFe 2 O 4 , exhibiting a low overpotential of 206 mV to achieve a current density of 10 mA cm –2 and excellent durability of stable operation for over 150 h. Additionally, catalysts featuring varying band structures were synthesized for comparative analysis, and it was found that the reversible redox processes of non-bonding oxygen and the accumulation of non-bonding oxygen species containing 2 p holes are critical prerequisites for triggering and sustaining the LOM NB pathway in transition metal spinel oxides. These findings may provide valuable insights for the future development of spinel-oxide-based LOM catalysts.
研究领域:
材料科学
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电化学
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催化科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Tianyan Lan,Hongmei Du,Yunwu Li,Konggang Qu,Jinsheng Zhao,Xianxi Zhang,Yunyun Dong,Yan Zhang,Xueyue Zhang,Danyang Zhang
The development of bifunctional electrocatalysts to reduce the polarization loss is essential to enhance the performance of Zn-air batteries. The combination of metal-organic frameworks (MOFs) with metal or metallic compounds provides a way to integrate their merits and effectively improve their electrocatalytic performances. However, previous synthesis of MOFs/metal oxides usually involves high-temperature calcination , which makes it difficult to control their morphologies. In this work, through a ligand-insufficient and high temperature controlled solvothermal reaction, innovative NiFe-MOF/NiFe 2 O 4 hollow nanospheres were one-pot prepared without using any shape-controlled agent or calcination process. The as-obtained NiFe-MOF/NiFe 2 O 4 shows better ORR and OER performance than pure NiFe-MOF and NiFe 2 O 4 , suggesting a synergetic effect between NiFe-MOF and NiFe 2 O 4 . The maximum power density of the liquid Zn-air battery assembled using NiFe-MOF/NiFe 2 O 4 as the air electrode catalyst is 158.4 mW cm −2 at 246.1 mA cm −2 . This work offers fresh thoughts into designing highly efficient MOF-derived electrocatalysts.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yunqi Xu,Kang Wang,Senlin Zhao,Qingshan Xiong,Guanghui Liu,Yan Li,Qunling Fang,Xinglong Gong,Shouhu Xuan
Infectious diseases caused by drug-resistant bacteria bring an increasing threat to public health. Thus, finding an effective approach equipped with a synergistic antibacterial performance becomes a critical challenge. This work reports a NiFe 2 O 4 @Au/Polydopamine core/shell nanosphere with rough surface, which exhibits a photothermal and magnetolytic coupling antibacterial behavior. The Au/Polydopamine (Au/PDA) hybrid layer, covered on the stable magnetic NiFe 2 O 4 nanosphere by a one-step polymerization method, possesses an excellent photothermal effect. Simultaneously, the superparamagnetic characteristic offers the NiFe 2 O 4 @Au/Polydopamine with fantastic magnetolytic force to the biological organism under a rotating external magnetic field. It is found that the NiFe 2 O 4 @Au/PDA core/shell nanospheres show good photothermal antibacterial performance (808 nm laser irradiation) on both Escherichia coli and Staphylococcus aureus . Notably, the photothermal antibacterial performance can be significantly improved under applying the rotating magnetic field. This novel photothermal-magnetolytic coupled antimicrobial method supplies a high performance photothermal bactericidal therapy via a remote conduction and reduces the possible damage to normal tissue caused by overheating. Besides bactericidal therapy, the easily and scalable magnetolytic enhancing method is believed to possess high potential in drug delivery, antitumor, and bioseparation.
研究领域:
生物医学工程
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纳米医学
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感染病学
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2021
·Vol. 104
·期 12
·6696-6708
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IF 3.784
Huaiyang Chen,Xiaoping Shen,Keqiang Xu,Yao Chen,Aihua Yuan,Zhenyuan Ji,Zhitao Wang,Guoxing Zhu
Binary transition-metal oxides with spinel structure have great potential as advanced anode materials for lithium-ion batteries (LIBs). Herein, NiFe-NiFe 2 O 4 / reduced graphene oxide (rGO) composites are obtained via a facile cyanometallic framework precursor strategy to improve the lithium storage performance of NiFe 2 O 4 . In the composites, NiFe-NiFe 2 O 4 nanoparticles with adjustable mass ratios of NiFe 2 O 4 to NiFe alloy are homogeneously deposited on rGO sheets. As anode material for LIBs, the optimized NiFe-NiFe 2 O 4 /rGO composite displays remarkably enhanced lithium storage performance with an initial specific capacity as high as 1362 mAh g −1 at 0.1 A g −1 and a decent capacity retention of ca . 80% after 130 cycles. Besides, the composite delivers a reversible capacity of 550 mAh g −1 at 1 A g −1 after 300 cycles. During the charge–discharge cycles, the aggregation of the NiFe-NiFe 2 O 4 nanoparticles and the structural collapse of the electrode can be well alleviated by rGO sheets. Moreover, the conductivity of the electrode can be significantly improved by the well-conductive NiFe alloy and rGO sheets. All these contribute to the improved lithium storage performance of NiFe-NiFe 2 O 4 /rGO composites.
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
高影响因子
ELECTROCHIMICA ACTA
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2018
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IF 5.116
Peng Zhao,Xingke Ye,Yucan Zhu,Hedong Jiang,Lingling Wang,Ziyu Yue,Zhongquan Wan,Chunyang Jia
Binary metal oxides are considered as promising electrode materials due to the higher electrochemical activity than mono metal oxides. However, the poor conductivity and aggregation of binary metal oxides impede ion and electron transport kinetics, which deteriorates their electrochemical performances. Herein, we design and fabricate three-dimensional ordered macroporous NiFe 2 O 4 on carbon yarn, in which a core of carbon yarn is covered with the sheath of three-dimensional ordered macroporous NiFe 2 O 4 . The three-dimensional ordered macroporous structure is feature with abundant transportation shortcuts for electrolyte ions and excellent structural stability, thus offering great advantages for efficient fibriform supercapacitor . The fibriform supercapacitor is further assembled using two intertwined three-dimensional ordered macroporous NiFe 2 O 4 -carbon yarn electrodes, both of which are solidified in the KOH-polyvinyl alcohol gel electrolyte. The assembled fibriform supercapacitor exhibits high specific capacitance (247 μF cm -1 at scan rate of 10 mV s −1 ) and robust cycling stability (96% capacitance retention after 8000 cycles). Furthermore, the fibriform supercapacitor shows substantial mechanical flexibility with minor capacitance decrease upon continuous bending cycles, and the knitted fibriform supercapacitor exhibits the excellent wearability and integration. Thus, the as-prepared fibriform supercapacitor shows great promise as the energy storage unit for wearable electronics.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Yu Fan,Bowen Lu,Xinyu Zhi,Cong Luo,Liqi Zhang
NiFe 2 O 4 exhibits excellent redox properties and is widely applied in CaO-NiFe 2 O 4 chemical looping processes. However, rapid sintering of Ni-Fe alloy under reaction conditions limited its industrial applications. The CeO 2 -NiFe-CaO were synthesized through a physical mixing method with NiFe 2 O 4 as a precursor, and its CO 2 capture capacity and in-situ hydrogenation performance were conducted on ICCC-RWGS reaction under different conditions. 20CeO 2 -NiFe-CaO exhibited a CO yielding of 9.35 mmol/g at 650 °C. During the carbon capture stage, CO 2 was adsorbed by CaO, leading to the formation of CaCO 3 . In the hydrogenation conversion stage, hydroxyl groups were generated on the surface, combining with CaCO 3 to produce formate species, further generating H 2 O and CO. 15CNF-CaO exhibited superior cyclic ICCC-RWGS reaction performance compared to 15NF-CaO, with a CO yield of 1.88 mmol/g after 40 cycles. CeO 2 inhibited the sintering of catalytic components, preserving a higher specific surface area and smaller particle size. Furthermore, CeO 2 in 15CNF-CaO inhibited carbon deposition and enhanced in-situ hydrogenation performance, exhibiting better CaO regeneration capability and better cyclic stability. These results could provide insight for designing the DFMs for the ICCC-RWGS process.
研究领域:
化学工程
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材料科学
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Shuting Min,Chenxuanzi Wang,Mingxuan Zhong,Yibo Guo,Bo Xiao,Tingting Xu,Xun Wang
In this study, a series of composite oxygen carriers (OCs) of NiFe 2 O 4 /Sr 4 Fe 6 O 13 (xNiySr 4 ) was synthesized by solid-phase synthesis method. The performance evaluation for syngas and hydrogen production was investigated in chemical looping reforming coupled with thermochemical water splitting using ethanol as fuel. The presence of NiFe 2 O 4 enhanced the lattice oxygen activity and intensified the reduction of Sr 4 Fe 6 O 13 . The Ni–Fe alloy was produced in fuel reactor (FR) and then promoted water splitting in steam reactor (SR) for hydrogen production. The presence of Sr 4 Fe 6 O 13 regulated the reactivity of NiFe 2 O 4 , which prevented the ethanol complete oxidation in FR and enhanced the syngas production. Additionally, the introduction of Sr 4 Fe 6 O 13 decreased the content of NiFe 2 O 4 and suppressed carbon deposition, which resulted in a high purity of hydrogen in SR. Moreover, the existence of Sr 4 Fe 6 O 13 mitigated the sintering of NiFe 2 O 4 . The composite oxygen carrier of NiFe 2 O 4 /Sr 4 Fe 6 O 13 exhibited better cyclic stability than the single NiFe 2 O 4 and Sr 4 Fe 6 O 13 oxygen carrier. The 0.4NiFe 2 O 4 /0.6Sr 4 Fe 6 O 13 oxygen carrier, termed as 4Ni6Sr 4 , exhibited a good performance for syngas and hydrogen production performance at 800 °C. A high syngas purity of 74.36% was observed with a yield of 1.05 Nm³/kg ethanol in FR. The hydrogen yield and purity in SR were 6.51 mmol/g OC and 96.60%, respectively.
研究领域:
能源科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhiyuan Yin,Xinran Yin,Yingxuan Feng,Sili Huang,Runzhi Zhang,Xujun Zhang,Xiubing Du,Suqin Yu,Yingying Li,Yiqiang Wu
Recently, there has been growing interest in utilizing wood-based composites for electromagnetic interference (EMI) shielding due to their unique porous and sustainability. This study investigates the potential of using wood as a matrix material to enhance EMI shielding performance by incorporating function materials into its natural channels. Specifically, we developed a novel wood-based composite by in situ incorporation of NiFe 2 O 4 spinel ferrite into the wood’s porous structure, resulting in an innovative EMI shielding material with tailored magnetic and structural properties. A detailed evaluation of the composites’ structural, morphological, magnetic, and electromagnetic characteristic, as well as their thermal stability, was conducted. The wood@NiFe 2 O 4 composite, with a thickness of only 1 mm, demonstrate an excellent EMI shielding effectiveness of 30.4 dB in the X-band. This work not only advances the development of sustainable, biomass-derived EMI shielding materials but also paves the way for reducing reliance on conventional, non-renewable, and costly materials for electromagnetic protection, offering a more enviromentally friendly and cost-effective solution.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Composites Science
·
2025
·Vol. 9
·期 5
·250
·
IF 3.7
Waheed Rehman,Faiq Saeed,Samia Arain,Muhammad Usman,Bushra Maryam,Xianhua Liu
NiFe2O4and TiO2are widely studied for photoelectrochemical (PEC) applications due to their unique properties. Nitrogen-doped graphene (NG) and metal–organic frameworks (MOFs), such as MIL-100(Fe) (where MIL stands for Materials of Lavoisier Institute), are commonly incorporated to enhance PEC performance by offering a high surface area and facilitating efficient charge transport. Composite systems are commonly employed to overcome the limitations of individual PEC catalysts. In this study, a highly efficient NiFe2O4/NG@MIL-100(Fe)/TiO2photoanode was developed to enhance photoelectrochemical water-splitting performance. The composite was synthesized via a hydrothermal method with a two-step heating process. X-ray diffraction confirmed the expected crystal structures, with peak broadening in NiFe2O4indicating reduced crystallite size and increased lattice strain. X-ray photoelectron spectroscopy of the Ni 2p and Fe 2p regions validated the successful integration of NiFe2O4into the composite. Electrochemical analysis demonstrated excellent performance, with linear sweep voltammetry achieving a peak photocurrent density of 3.5 mA cm−2at 1.23 V (vs RHE). Electrochemical impedance spectroscopy revealed a reduced charge-transfer resistance of 50 Ω, indicating improved charge transport. Optical and electronic properties were evaluated using UV-Vis spectroscopy and Tauc plots, revealing a direct bandgap of 2.1 eV. The composite exhibited stable photocurrent under amperometric J-t testing for 2000 s, demonstrating its durability. These findings underscore the potential of NiFe2O4/NG@MIL-100(Fe)/TiO2as a promising material for renewable energy applications, particularly in photoelectrochemical water splitting.
研究领域:
材料科学
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能源科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Ao Ren,Chunbo Liu,Yuanzhi Hong,Weidong Shi,Shuang Lin,Ping Li
The novel NiFe 2 O 4 /Bi 2 O 3 heterostructures with visible-light-driven photocatalytic activity for antibiotic degradation were prepared by a hydrothermal method following by a microwave-assisted synthetic method. The composition and shapes of NiFe 2 O 4 /Bi 2 O 3 heterostructures were discussed based on the results of X-ray diffraction, scanning electron microscopy, transmission electron microscopy , UV–vis diffuse reflection spectroscopy. For the remove of tetracycline in water, the NiFe 2 O 4 /Bi 2 O 3 heterostructures exhibited significantly higher visible light photocatalytic activity than that of a single semiconductor. The effects of mass ratios between NiFe 2 O 4 and Bi 2 O 3 in the heterostructures on photocatalytic activity were also investigated and the optimal percentage of doped NiFe 2 O 4 was 50%. The enhanced photocatalytic performance of the NiFe 2 O 4 /Bi 2 O 3 heterostructures was mainly ascribed to the band potential of which matched suitably followed by efficient charge separation and transfer across the heterostructures interface. Further the heterostructures can be recovered and recycled under a magnetic field along with good stability.
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
危险品化学品经营许可证（带存储）