Journal of Cleaner Production
·
2024
·
IF 9.7
Chun Wang,Bai-Hang Zhao,Bao-Yu Zhang,Yi-Hao Zhu,Ye Li
The presence of antibiotics in wastewater threatens the human living environment. Activated peroxymonosulfate (PMS) method is often used for catalytic degradation of antibiotics. However, how to reduce catalyst cost and ensure efficient degradation of antibiotics at the same time is a sticky issue for the activated PMS method. Two-dimensional vermiculite flakes (2D-VMT) is cost-effective and can be used as catalyst carriers for PMS activation. Hence, we exfoliated 2D-VMT from natural vermiculite and prepared NiCo 2 O 4 loaded 2D-VMT (NiCo 2 O 4 /2D-VMT) catalyst. Levofloxacin (LVX), as a normal antibiotic , was used to evaluate the catalytic capacity of NiCo 2 O 4 /2D-VMT in PMS systems. Also, LVX degradation mechanism through NiCo 2 O 4 /2D-VMT activated PMS were explored here. XRD , EDS, TEM, and HRTEM analysis all demonstrated NiCo 2 O 4 nanoparticles were successfully anchored on 2D-VMT. NiCo 2 O 4 /2D-VMT had a high specific surface area and abundant active sites. The NiCo 2 O 4 /2D-VMT/PMS system, with a 15% mass ratio of NiCo 2 O 4 to 2D-VMT (15%-CN/2D-VMT), achieved LVX removal efficiency of 87% and LVX removal rate of 0.034 min −1 . 1 O 2 and SO 4 · - were the major ROS for LVX degradation. The reversible redox cycle between Co(III)/Co(II) and Ni(III)/Ni(II) played a crucial role in activating PMS to generate ROS for LVX degradation process. Also, based on intermediates identification by LC-MS, possible degradation pathways of LVX were proposed and their ecotoxicological evolution was assessed by using the ECOSAR software. 15%-CN/2D-VMT may be a worth recommended loaded catalyst for antibiotics removal in environmental remediation, owing to its high reusability and excellent renewability.
研究领域:
环境科学
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催化材料
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污染治理
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Jingjing Xie,Wei Jiang,Fei Tang,Ying Gao,Hongyu Li,Jiyang Li,Deyang Zhao,Zhiqiang Lv,Zhenglong Yang,Yanbin Xu
La 2 O 3 doped hollow porous Ni/NiCo 2 O 4 /C microspheres (NCO-La) are prepared by solvothermal method. The doping of porous La 2 O 3 nanoparticles is crucial to reduce the crystalline grain size of NiCo 2 O 4 and the internal resistance of the electrode, which facilitates ionic and electronic transportation efficiency. Hollow porous NCO-La microspheres with carbon networks have good mechanical strength and can effectively suppress volume expansion and aggregation. The combination of high-conductivity carbon and metallic nickel improves electronic conductivity. The nanostructure in the composite microspheres brings abundant active sites, which facilitates rapid redox of metal ions and allows rapid insertion and removal of Li + , consequently effectively improving the specific capacity. Benefiting from the synergy of well-designed nanostructure, the material shows high Li + storage performance and good stability. At 0.2 A g −1 after 250 cycles, the discharge specific capacity of NCO-La0.1 (1596.2 mAh g −1 ) is far better than NiCo 2 O 4 (655.6 mAh g −1 ) without La 2 O 3 doping. Such design concept of nanostructures provides a promising way to develop high-performance anode materials for LIBs.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Tao Cong,Xiaoyu Wang,Xifeng Ding
Metal–air batteries, with high energy density and eco-friendliness, are crucial for sustainable energy. Although abundant and low-cost, spinel oxides, ideal for metal–air batteries, suffer from low conductivity, hindering electron transport and slowing electrocatalytic kinetics. In this work, NiCo2O4 (NCO) was embedded on carbon nanotubes (CNTs) via a hydrothermal method to form a composite catalyst (NCO-1CNTs), and subsequent annealing in nitrogen enhanced oxygen vacancy concentration in the spinel structure. In 0.1 M KOH, NCO-1CNTs achieves outstanding oxygen evolution reaction (OER) performance (η10 = 427 mV) and oxygen reduction reaction (ORR) performance (jL = 5.1 mA cm–2), surpassing NCO by 16.6% and 82.1%. The enhanced catalytic activity is attributed to the high conductivity of carbon nanotubes, which accelerates electron transfer. Additionally, carbon nanotubes prevent spinel oxide aggregation, increase active sites, and form a porous structure, enhancing oxygen species transport. Moreover, annealing NCO-1CNTs in a nitrogen atmosphere induces the spinel component to generate more oxygen vacancies, boosting catalytic performance. The resulting zinc–air battery delivers a power density of 68 mW cm–2 and exhibits stable performance over 100 h of charge–discharge cycling. This study delivers a low-cost, high-activity, stable bifunctional cathode catalyst, signaling great promise for commercial rechargeable zinc–air batteries.
研究领域:
材料科学
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电化学
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能源技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Peng-jie Zhu,Fang-yuan Su,Li-jing Xie,Xiao-Ming Li,Yong-feng Li,Cheng-Meng Chen
Research into environmentally friendly energy storage devices is a vital strategy to address the energy crisis and environmental pollution challenges. In this paper, oxygen-rich vacancy Co 3 O 4 /NiCo 2 O 4 heterojunction hollow nanocage electrodes were synthesized by a two-step hydrothermal and calcination method. Taking advantage of its unique structure, oxygen vacancies, and the synergistic effect of multi-element transition metal oxides, the electrode has good conductivity, high specific surface area, and abundant active sites. As a result, the Co 3 O 4 /NiCo 2 O 4 HHNCs electrode exhibits an ultra-high specific capacitance of 1788F g −1 at 1Ag -1 , and the assembled hybrid supercapacitor has an energy density of up to 43.9 Wh kg −1 , which is promising for applications in energy storage materials.
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
Journal of Zhejiang University-SCIENCE A
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2020
·Vol. 21
·期 1
·74-84
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IF 1.49
Fang Yang-yang,Wang Xiao-zhong,Chen Ying-qi,Dai Li-yan
The Knoevenagel condensation reaction has wide applications ranging from the manufacture of basic chemicals to pharmaceutical intermediates. In this study, we developed an efficient and magnetic bimetallic NiCo 2 O 4 nanocatalyst by co-precipitation. When used in the Knoevenagel condensation between various benzaldehydes and malononitrile, the catalyst exhibited excellent catalytic performance with 99% conversion and 99% selectivity under mild conditions. It can be easily recovered with a magnet and recycled for 20 runs without significant loss of activity. We expect that the catalyst will find large-scale industrial applications.
研究领域:
催化化学
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纳米材料科学
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有机合成方法学
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绿色化学
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工业催化
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Zhouling Wu,Zhixuan Zhang,Zhiqi Liang,Li Cheng,Shuang Yang,Zhengxing Jiang,Yurong Qi,Zufei Hu,Yang Yang
Crystal plane engineering is an emerging strategy for enhancing the surface activity of catalysts, but there is little research on how crystal planes affect electrochemical non-enzymatic H 2 O 2 sensors. We synthesize four distinct NiCo 2 O 4 nanocrystals with different crystal planes and investigate their impact on electrochemical non-enzymatic H 2 O 2 sensing through a systematic combination of experimental and theoretical approaches. NiCo 2 O 4 nanosheets exposing the {3 1 1} crystal plane (311-NS) demonstrate the highest electrocatalytic activity for H 2 O 2 oxidation, with excellent selectivity, repeatability, reproducibility, and long-term stability. The H 2 O 2 detection performance of NiCo 2 O 4 with is consistent with the total amount of surface Co 3+ and Ni 3+ , indicating that the Co 3+ and Ni 3+ exhibit higher activity for H 2 O 2 oxidation. Our density functional theory calculations attribute the superior sensing performance of 311-NS primarily to its high dangling bond density of Co(III) and Ni(III) and its increased surface energy, both facilitate the oxidation of H 2 O 2 . We additionally construct a 311-NS/rotating disk electrode sensor that detects H 2 O 2 in real samples with accuracy comparable to that of high-performance liquid chromatography, highlighting its potential for applications in environmental monitoring and food safety. This study not only broadens our understanding but also demonstrates that selective exposure of specific crystal planes enhances electrochemical non-enzymatic H 2 O 2 sensing performance, an insight to guide development of future peroxide sensors.
研究领域:
材料科学
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电化学
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传感器技术
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产品关联
DOI
高影响因子
Journal of Nanoelectronics and Optoelectronics
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2021
·Vol. 16
·期 6
·926-932
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IF 0.961
Peng Liwen,Wang Haiwang,Lv Mengge
In this paper, a Mn/NiCo2O4 catalyst was prepared for the complete oxidation of low-concentration methane. When the ratio of Mn: Co is 1:4, the catalyst has the best catalytic activity, and the best methane conversion temperature Feis 400 °C. In addition, the
catalytic activity remains stable during the long-term reaction, showing adequate thermal stability. The catalyst is grown on FeCrAl alloy by hydrothermal method to complete the catalytic oxidation of methane. In the catalysis process, the Mn/NiCo2O4-FeCrAl catalyst is
energized and the current is directly passed through the alloy substrate to generate Joule heat, reaching the optimal catalytic temperature for complete oxidation of methane.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Zhixiong Yang,Bo Hu,Xiaotian Wang,Dmitry Selishchev,Gaoke Zhang
The development of high-performance photocatalysts is crucial for enabling efficient CO2 conversion in photocatalytic systems. Here, we developed a novel heterojunction (N-BON) composed of Ni-doped Bi4O5Br2 and NiCo2O4 for CO2 photoreduction with the help of simulated sunlight. The optimized 21N-BON composite exhibited the highest activity, producing 18.66 μmol·g–1·h–1 of CO with a selectivity of 95.7%, which represents a remarkable 2.15-fold and 4.75-fold increase in CO yield compared to the Bi4O5Br2/NiCo2O4 heterojunction and Ni-doped Bi4O5Br2, respectively. Photoelectrochemical testing, photoluminescence analysis, and theoretical calculations demonstrated that the enhanced performance of the 21N-BON composite is attributed to improved photogenerated carrier separation, driven by the synergistic effects of Ni-doping-induced spin polarization and the built-in electric field from heterojunction construction. Additionally, theoretical calculations and in situ DRIFTS analyses was used to clarify the CO2 reaction mechanisms on the photocatalyst surface, showing that Ni doping improved CO2 adsorption and promoted the formation of key reaction intermediates. This study offers important guidance for developing advanced photocatalysts for solar-driven CO2 reduction, contributing to sustainable energy solutions.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
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IF 5.532
Xiao-Fei Zhang,Xiao-Hua Zuo,Wen-Jun Zhu,Pei-Lin Che,Da-Wei Shi,Shun-Sheng Chen
Nano-sized NiCo 2 O 4 powders were prepared by a facile hydrothermal method . The phase structure, particle morphology , specific surface area and pore size distribution of the powders were examined as a function of their calcination temperature. In view of utilization in supercapacitors , the electrochemical properties of the electrodes prepared from the powders were investigated by means of cyclic voltammetry , galvanostatic charge-discharge and electrochemical impedance spectroscopy techniques. In addition, the electrochemical properties of the electrodes were tentatively interpreted with respect to the kinetics parameters of electrons and ions involved in the electrode reaction. The NiCo 2 O 4 powder calcined at 350 °C displayed nanorod morphology (30–50 nm in diameter and 200–400 nm in length) and optimal electrochemical properties among the investigated specimens. The electrode prepared from the powder displayed an outer voltammetric charge of 113 C/g and a charge transfer resistance of 0.39 Ω together with a specific capacitance of 343 C/g under current density of 1 A/g and a capacitance retention of 108% after 5000 charge/discharge cycles measured at 20 A/g.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Fanwei Meng,Chao Qu,Lanyang Wang,Decai Yang,Zezhong Zhao,Qing Ye
Photocatalytic CO 2 reduction technology plays a significant role in the energy and environmental sectors, highlighting the necessity for developing high-efficiency and stable catalysts. In this study, a novel photocatalyst, x NiCo 2 O 4 /CN ( x = 1, 3, and 5 wt%), was synthesized by depositing zeolitic imidazolate framework-67 (ZIF-67)-derived nickel cobaltate (NiCo 2 O 4 ) hollow nanocages onto porous graphitic carbon nitride ( g -C 3 N 4 , CN) nanosheets for photocatalytic CO 2 reduction. Under visible light irradiation, the resulting 3NiCo 2 O 4 /CN photocatalyst demonstrated exceptional CO yields of up to 2879.5 μmol g −1 h −1 , surpassing those of NiCo 2 O 4 and CN alone by factors of 3.3 and 11.6, respectively. The introduction of hollow NiCo 2 O 4 nanocages increased the specific surface area of the material and enhanced the number of active sites, while strengthening visible light absorption. The creation of a built-in electric field, induced by the Fermi level difference between the two materials, was confirmed through ultraviolet photoelectron spectroscopy (UPS) characterization. This resulted in the formation of a Z-scheme heterojunction, significantly enhancing the separation and migration of photogenerated charge carriers. Notably, 3NiCo 2 O 4 /CN exhibits excellent stability during long-term photocatalytic reactions, ensuring reliable performance for practical applications. This study offers novel insights and methodologies for developing efficient photocatalytic CO 2 reduction catalysts.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2024
·
IF 15.7
Yan Duan,Mifeng Xue,Bin Liu,Man Zhang,Yuchen Wang,Baojun Wang,Riguang Zhang,Kai Yan
Electrocatalytic refinery of low-value biomass-based glycerol into value-added chemicals formic acid (FA) is an attractive alternative to traditional thermochemical refineries. However, constructing non-precious catalysts with abundant active hydroxyl (OH*) is the main obstacle to the electrocatalytic glycerol oxidation reaction (EGOR). Herein, we combine density functional theory (DFT) and experiments to investigate EGOR over the finely constructed NiCo 2 O 4 nanosheets. DFT results firstly indicate that the NiCo 2 O 4 nanosheets exhibit the highly hydroxylated (311)-OH* surface with the lowest Gibbs free energy, which significantly improves the electrochemical reaction kinetics and can achieve desirable FA yield by adjusting the adsorption energy of the adsorption intermediate. Following the theoretical prediction, ultrathin NiCo 2 O 4 nanosheets (~1.70 nm) are fabricated by a facile electrodeposition method with sufficient OH* on the surface. The charge-transfer resistance of NiCo 2 O 4 nanosheets in EGOR is only 0.94 Ω and the anode power consumption can be reduced by up to 320 mV at 10 mA cm −2 , keeping the high glycerol conversion (89%) and FA selectivity (70%) during the 120-h stability test. DFT calculations and experimental tools (e.g., multi-potential step experiments, operational electrochemical impedance spectroscopy) confirm that OH* in-situ generated on the thin nanosheets structure is essential in facilitating charge transfer between catalysts and adsorbed molecules to enhance C–C bond cleavage. This work offers a guideline for the rational design of robust catalysts for the selective upgrading of biomass-derived chemicals.
研究领域:
电化学
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催化材料
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理论计算
·
生物质转化
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Long Cheng,Linzhi Zuo,Chengping Li,Jiubing Shen,Liang Wang,Yang Li,Dmitrii Dukashin,Petr Senin,Shitan Yan,Ting Bian
Solar-driven interfacial evaporation is a kind of sustainable and eco-friendly method of water treatment to alleviate the global water crisis. Here we demonstrate a novel sandwiched solar interfacial evaporator integrating phase change material (PCM), sodium alginate hydrogel (SA), and NiCo 2 O 4 nanoflower featuring superb evaporation and glorious thermal energy management to achieve efficient energy utilization and long-term evaporation stability. After being combined with filter paper, NiCo 2 O 4 nanoflower composites are adopted as the light absorber on the top layer, which can achieve an absorption of about 96.5 % in the full spectral range. SA hydrogel has been used as an intermediate layer for rapid water supply to the evaporation interface and to prevent salt deposition. Under one sun irradiation (1 kW m −2 ), the evaporator exhibits a high evaporation rate (1.94 kg m -2 h −1 ) and excellent endurance in the treatment of high salt-concentration water. In particular, benefiting from the rational combination of PCM, the water production reached up to 12.13 kg m −2 , which is 2.23 kg m -2 higher than that of the evaporator without PCM under natural solar irradiation for 9 h. This work presents a promising concept for maximally utilizing intermittent solar irradiation energy and prolonged salt-free deposition desalination.
研究领域:
材料科学
·
能源工程
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环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）