ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Ye Wang,Zhiguo Nie,Xinyi Li,Rui Wang,Yang Zhao,Huan Wang
Driven by the urgent requirement to monitor the trace amount of heavy metal ions, a novel electrochemical sensing platform is constructed by surface modification of magnetic NiFe2O4 nanoparticles with polypyrrole (PPy). This NiFe2O4/PPy nanocomposite has a unique three-dimensional network architecture. Under the optimized experimental conditions, the fabricated sensor exhibits enhanced sensing performance for selective recognition of trace Pb2+ in the range of 0.1–2.1 μM by square wave anodic stripping voltammetry. The sensitivity of a NiFe2O4/PPy-decorated glassy carbon electrode (GCE) toward Pb2+ is verified to be superior to that of both bare GCE and NiFe2O4-decorated GCE, and an extremely low detection limit of 3.9 nM (S/N = 3) can be achieved. The accurate detection of Pb2+ is also challenged by various aqueous media and satisfactory recoveries varied from 98–107%, endowing it with great prospects in the analysis of real water samples. Moreover, the interferences from coexisting ions such as Cd2+, Fe3+, Zn2+, Ni2+, Cu2+, and Na+ can be ignored to some extent. The present study not only provides a new candidate for the efficient detection of Pb2+ but also sheds light on exploring advanced electrode materials to rationally design sensing interfaces.
研究领域:
材料科学
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环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Dan Chen,Fan Zhang,Weide Wang,Yan Yang,Guangren Qian
As an effective photocatalyst , PANI/NiFe 2 O 4 nanocomposite was prepared by in situ polymerization of aniline. The physicochemical properties of the composite were characterized by TEM, XRD , FT-IR spectra, UV–vis spectroscopy, XPS and Photoelectrochemical Measurements. Compared with NiFe 2 O 4 and PANI , PANI/NiFe 2 O 4 nanocomposite has a better photocatalytic activity, which exhibited the remarkable property of hydrogen production under visible light. The photocatalytic mechanism was also discussed. The heterojunction of PANI and NiFe 2 O 4 promoted the separation of photogenerated e − and h + on the surface of PANI/NiFe 2 O 4 . Besides, the structure of PANI/NiFe 2 O 4 in the polymerization was detected by FT-IR. NiFe 2 O 4 was proved that in favor of the formation of nucleate phenazine-like structure in the progress of in situ polymerization. Then the chain structure of conductive PANI was formed, which leading to the promotion of photocatalytic activity .
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Sustainable Materials and Technologies
·
2022
·
IF 10.681
Boshu Jiang,Qiming Sun,Bachirou Guene Lougou,Hao Zhang,Xian Li,Zhibin Qu,Yong Shuai,Chi-Hwa Wang
The solar-driven thermochemical CO 2 conversion is an effective way to achieve the mission of carbon peaking and carbon neutrality . However, finding a material with excellent thermal stability, oxygen exchange capacity, and CO selectivity is one of the most important challenges in the thermochemical CO 2 conversion approach. This study investigated the solar thermochemical CO 2 -splitting characteristics through the synergistic thermal catalytic activity of CuO and NiFe 2 O 4 and the effect of SiC photothermal properties. The thermochemical redox cycling performance of CO 2 conversion through thermally activated catalysts was experimentally investigated via thermogravimetric combined quantum chemical calculations to provide comprehensive insights into the physicochemical principles underlying the thermochemical catalytic CO 2 -splitting. The X-ray diffraction, scanning electron microscopy, and energy spectrum detector technics were developed to gain detail on the crystal structure, surface morphology , and chemical composition changes in the reacting media. The newly synthesized composite material consisting of 25%CuO and 75%NiFe 2 O 4 (CNF-13) coated SiC porous skeleton resulted in higher CO 2 -splitting catalytic activity with an instantaneous CO production of 10.98mL ⋅ min ‐1 g CNF‐13 −1 and direct CO 2 -to-CO conversion rate of 33.9% at 1000–1200 K reaction temperature. The thermochemical CO 2 -splitting activity and redox stability of CNF-13@SiC was promoted by the photothermal properties of SiC support and the formation of Cu 2 O and Fe 3 O 4 new active material phases easing CO 2 reduction at low energy. This study provided experimental and theoretical findings that can be used as guidance for the fundamental research and application of CO 2 catalytic conversion into fuels through a solar thermochemical driven strategy.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
·
2022
·
IF 11.446
Boshu Jiang,Bachirou Guene Lougou,Hao Zhang,Boxi Geng,Lianxuan Wu,Yong Shuai
The solar-driven thermochemical CO 2 -to-CO conversion is an effective way to achieve the mission of carbon peaking and carbon neutrality. However, synthesizing porous reacting materials with excellent thermal stability, hardness and long-term cyclic stability, oxygen exchange capacity, and higher CO 2 -to-CO conversion are the most important challenges associated with the thermochemical CO 2 -splitting approach and technological upscaling to large-scale applications. This study presented the development of NiFe 2 O 4 oxygen carriers, the synthesis method of SiC and Si 3 N 4 supports, and solar-to-fuel processing of the newly prepared materials through CO 2 -splitting under a highly concentrated solar radiative heat flux. The newly synthesized NiFe 2 O 4 @SiC porous redox material resulted in higher solar energy absorption and CO 2 conversion capability with an instantaneous CO production of 410 μmol/g and direct CO 2 -to-CO conversion rate of 18.1 % at 1073–1273 K reaction temperature. The media composite of NiFe 2 O 4 @SiC exhibited high-temperature thermal changes, good thermochemical reaction stability, and a higher CO production rate through six redox cycles compared to NiFe 2 O 4 @Si 3 N 4 porous reacting material. The high oxidation potential and remarkably solar radiative heat flux absorption and thermochemical CO 2 -splitting capacities of the newly developed materials were demonstrated through experimental analysis. The synergistic effect of the oxygen carriers (NiFe 2 O 4 ) and substrate materials including SiC and Si 3 N 4 skeletons for CO 2 -splitting is highlighted. This study provided comprehensive and novel experimental insights that can be used as guidance for theoretical research and application in CO 2 conversion into high-value-added energy products.
研究领域:
材料科学
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可再生能源
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 4
·2758-2765
·
IF 1.354
Dong Tao,Liu Yunshi,Liu Debao,Yang Ping
One dimensional (1D) NiFe2O4 nanofibers have been successfully fabricated using single-nozzle electrospinning technique and subsequent calcination process through adjusting heat-treatment parameters. The calcination procedure plays a key role for the formation
of nanofibers with different morphologies. The lithium storage properties of NiFe2O4 nanofibers were evaluated by galvanostatic cycling studies in half-cell configuration. Furthermore, their photocatalytic property under vis-light irradiation with H2O2
addition is investigated at room temperature. As-synthesized nanofibers with regular 1D nanostructure with large surface area and high crystallinity calcined at 600 °C exhibited fine lithium storage with excellent cycling and rate performance, as well as excellent photocatalytic performance
with 97% degradation proportion of methylene blue after 30 min. This is ascribed to NiFe2O4 absorbed the photon energy and generated electron–hole pairs under vis-light irradiation.
研究领域:
材料科学
·
能源存储
·
环境科学
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2019
·Vol. 14
·期 16
·2796-2801
·
IF 3.698
Fengchi Wu,Gang Ou,Ye Wang,Haizhe Zhong,Lifu Zhang,Henan Li,Yumeng Shi
Urea is an important organic pollutants in sewage and needs to be removed for environmental protection. Here, we report defective NiFe 2 O 4 (NFO) nanoparticles with excellent performance for urea electro-oxidation. The results show that defects can be effectively implanted at the surface of NFO nanoparticles by a facile and versatile lithium reduction method without affecting its main crystal structure and grain size. The defective NFO-5Li nanoparticles displayed a significantly improved urea electro-oxidation performance compared with NFO-Pristine nanoparticles. Particularly, the NFO-Pristine and NFO-5Li show a potential of 1.398 and 1.361 V at the current density of 10 mA cm −2 and Tafel slope of 37.3 and 31.4 mV dec −1 , respectively. In addition, the NFO-5Li nanoparticles also revealed outstanding electrocatalytic stability. The superior performance can be attributed to the designed tunable surface defect engineering. Furthermore, the defect engineering strategy as well as the defective NFO nanoparticles hold great potential for applications in other materials and areas.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Riguang Cheng,Lixian Sun,Fen Xu,Yumei Luo,Chenchen Zhang,Yongpeng Xia,Sheng Wei,Yanxun Guan,Mengmeng Zhao,Qi Lin,Hao Li
Lithium–sulfur batteries are promising as next-generation rechargeable energy-storage devices because of their high energy density, low cost, and environmental friendliness. However, sulfur cathodes suffer from low specific capacity caused by the poor electrical conductivities of the active materials and fast capacity decay resulting from polysulfide dissolution/shuttling. Herein, we report a facile and low-cost method to solve these problems using an activated carbon (AC)–NiFe 2 O 4 /S hybrid material in which NiFe 2 O 4 is uniformly distributed on AC through a simple wet impregnation method. The AC–NiFe 2 O 4 /S material not only has a strong catalytic effect on sulfur reduction, but also provides strong binding sites to trap polysulfide intermediates. An AC–NiFe 2 O 4 /S electrode shows favorable electrochemical properties including stable reversible capacity (0.24% capacity decay per cycle at 0.1 C, retaining a capacity of 602.7 mAh g −1 after 170 cycles; stable cycling at 0.5 C, retaining a capacity of 501.9 mAh g −1 after 100 cycles), excellent rate performance, and fast electrochemical reaction kinetics compared with those of a reference AC/S electrode, which are attributed to the synergistic effects between NiFe2O4 and AC.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Gengen Peng,Zehao Zhang,Haibo Li
In this work, the nanoneedle-like NiFe 2 O 4 (NFO) has been prepared by a template method and post annealing process for capacitive deionization (CDI) with enhanced performance. Owing to the unique structure, the nanoneedle-like NFO provides large accessible surface area, which benefits to offer abundant electroactive sites for electrosorption. Meanwhile, the salty ions diffusion and electron exchange are promoted by needle-like structure. Further, it is found that the NFO annealed at 450 °C (NFO-450) demonstrate the high crystallinity, rich mesopores and exceptional electrochemical properties. As electrode for CDI, the NFO-450 has manifested the high desalting capacity of 1.62 mmol/g when the effective loading mass of both electrodes is 23.6 mg. Interestingly, the desalting capacity realizes the linear correlation with the mass of NFO electrode ranging from 23.6 to 45.8 mg. The mechanism analysis stands out that the Na + are captured by NFO, accompanied by the reduction of Ni 3+ to Ni 2+ in the 1 st cycle. Afterwards, the Na + can be electrostatically removed by the NFO//AC system.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2020
·Vol. 29
·期 12
·7971-7980
·
IF 1.652
Wang Bin,Du Jinjing,Gao Shoukun,Zhou Meng,Li Erhu,Li Linbo
NiFe 2 O 4 /nano-TiN ceramics were synthesized by a two-step cold-pressing sintering process. Sintering behavior, fracture morphology, mechanical performance and high-temperature conductivity were investigated. The results indicated that besides NiO and NiFe 2 O 4 , new Ni 3 TiO 5 and metallic phases (iron and nickel) formed in the sintered samples. TiN accelerated the grain growth along with considerable quantity of micro-pores in the sintered samples. Compared to the un-doped samples, the temperature for the onset of sintering of the NiO-Fe 2 O 3 -2.0 wt.% TiN system decreased from 1093 to 985 °C. TiN addition changed the sintering mechanism of the NiO-Fe 2 O 3 from grain boundary diffusion to volume diffusion. TiN additions reduce the apparent sintering activation energy and porosities and improve the density, bending strength, and pyroconductivity. Three-dimensional fracture morphology of the composite ceramics synthesized under argon atmosphere, exhibits self-similarity characteristics and the fractal dimension for NiFe 2 O 4 -1.0 wt.% TiN ceramics is 2.0813.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
·
2015
·
IF 1.644
Qiufang Yao,Chunde Jin,Huanhuan Zheng,Zhongqing Ma,Qingfeng Sun
Magnetic NiFe2O4 nanoparticles were successfully deposited on the wood surface via a hydrothermal process at 70°C. The surface of the as-prepared magnetic NiFe2O4/wood hybrids (MWHs) was covered by spherical-like NiFe2O4 particles with an average size of 50 nm. MWH exhibited the thermostability, microwave absorbability, and superparamagnetism with saturation magnetization () of 1.79 emu·g−1. With further modification by 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (FAS-17), MWH expressed superhydrophobic performances with a water contact angle of 158°. Its superparamagnetism stably remained under harsh conditions after chemical solutions corrosion and physical frozen test.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 8
·6000-6007
·
IF 2.22
Jia Chaowei,Zhang Yanlin,Kong Quan,Wang Qiuyue,Chen Gang,Guam HongTao,Dong Chengjun
The fabrication of mesoporous structures has emerged as an effective strategy to greatly improve the performance of gas sensor. In this study, mesoporous NiFe 2 O 4 was prepared by a facile ligand-assisted self-assembly approach using P123 as a soft template combined with carboxylic ligand. The gas sensor based on the as-fabricated NiFe 2 O 4 exhibits a higher response of 57 to 200 ppm acetone with fast response (44 s) and recovery (24 s) time at 210 °C. More importantly, the sensor also presents excellent selectivity and long-term stability. The enhanced gas sensing behavior could be attributed to the unique mesoporous NiFe 2 O 4 with high surface area (91.4 m 2 /g) to provide abundant reactive sites and mesopores to promote gas molecular diffusion.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2017
·Vol. 4
·期 9
·095501
·
IF 1.068
Zuming He,Yongmei Xia,Bin Tang,Jiangbin Su
Magnetically separable NiFe2O4/Cu2O composites were successfully synthesized by a two-step method. The samples were characterized by XRD, XPS, SEM and VSM as well as their PL spectra and UV–vis adsorption spectra. The results showed that the NiFe2O4/Cu2O composites were composed of cubic-structured Cu2O and spinel-structured NiFe2O4, were able to absorb a large amount of visible light, exhibited excellent photocatalytic activity under simulated solar light irradiation and could be easily separated by an external magnetic field. The NiFe2O4/Cu2O composites exhibited higher photocatalytic performance than that of a single semiconductor. It was found that the prominently enhanced photocatalytic performance of NiFe2O4/Cu2O composites was ascribed to the effective separation of photo-generated electron–hole pairs and the effective generation of the hydroxyl radical •OH.
研究领域:
材料科学
·
环境科学
✓ 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）