CATALYSIS LETTERS
·
2025
·Vol. 155
·期 9
·1-16
·
IF 2.4
Hu Rui,Wang Haiyin,Luo Jiahui,Song Jianjun,Jia Haiyuan
Peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs) have been proven to be an effective method for the removal of tetracycline in water. In this study, the Co 3 O 4 /molecular sieve catalyst synthesized by the incipient wetness impregnation method was used for PMS activation. The effect of specific surface area on the catalytic performance of Co 3 O 4 /molecular sieve catalyst was investigated and analyzed in detail by characterization techniques. In the Tetracycline hydrochloride (TCH) degradation experiment, the Co 3 O 4 /13X catalyst exhibited the highest specific surface area (490.584 m 2 /g) and provide abundant active sites, enabling 98.0% TCH degradation within 30 min under optimal conditions (1.5 g catalyst, 0.3 mM PMS, pH 8.0, 25℃), with a reaction rate constant (k obs ) of 0.0977 min -1 . In addition, the degradation mechanism of TCH was explored using electron paramagnetic resonance (EPR) spectroscopy and quenching experiments. It was confirmed that free radicals (SO 4 •− , •OH, O 2 •− ) and non-free radical species ( 1 O 2 ) generated during the reaction play a crucial role in the degradation process of TCH. In summary, the Co 3 O 4 /13X catalyst, when activating PMS, exhibits a remarkable synergistic effect on the degradation of TCH, and shows good repeatability and environmental adaptability. This study provides valuable insights into the design and optimization of catalysts for degrading antibiotic pollutants in water treatment processes. Graphical
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Scientific Reports
·
2018
·Vol. 8
·期 1
·1-11
·
IF 4.122
Abdalla Ibrahim,Shen Jiali,Yu Jianyong,Li Zhaoling,Ding Bin
Electromagnetic (EM) wave absorbing materials have been fabricated from diverse materials such as conductive polymers, carbon based nanostructures and magnetic metal oxides. Nevertheless, it has remained a great challenge to develop lightweight and high-efficiency EM wave absorbing materials with a broad frequency range. Herein, we report a scalable strategy to create Co 3 O 4 /carbon composite nanofibrous membrane by electrospinning technique followed by stabilization and carbonization processes. An optimal reflection loss (R L ) value of 36.27 dB is reached at 13.76 GHz for a layer of 2 mm thickness. RL exceeding −20 dB can be realized in any interval within the 4.5–14.4 GHz range by selecting a proper thickness of the absorbing layer between 1 and 5 mm. The Co 3 O 4 /carbon composite nanofibrous membrane could be well served as promising and attractive candidates for lightweight and enhanced EM wave absorbing materials. This presented research provides an innovative and effective approach to design the novel EM wave absorbing material in a broad frequency range for practical applications.
研究领域:
材料科学
·
电磁学
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ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Juan Wen,Huhu Chang,Ting Huang,Masud Hossain,Zaichun Liu,Haodong Sun,Yusong Zhu,Yuhui Chen,Qinghong Huang,Yuping Wu
The synthesis of ammonia in industrial-scale mainly depends on Haber-Bosch process, which entails huge energy consumption and massive CO 2 emission. Electrocatalytic nitrogen-to-ammonia is a promising alternative, which could be powered by renewable energy source. However, the development of proper catalysts with good yield, superior stability, and excellent selectivity is one of the most challenges for electrochemical reduction of nitrogen. Here, a cost-efficient electrocatalytic material, Co 3 O 4 coated on CNT, was reported as an electrocatalytic nitrogen reduction reaction catalyst to generate NH 3 . Applying CNT as an excellent substrate for growing Co 3 O 4 could effectively improve the electronic conduction properties and boost N 2 adsorption. This catalyst attains a favorable NH 3 yield as 27. 16 ± 2.22 µg h −1 mg cat. −1 at −0.49 V vs. RHE in 0.1 M Na 2 SO 4 solution under ambient conditions. It also shows strong electrochemical durability and excellent selectivity.
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COMBUSTION AND FLAME
·
2024
·
IF 5.8
Yuxiang Li,Kejuan Meng,Momang Tian,Lei Zhang,Xiaoxia Ma,Kaili Zhang
Metastable intermolecular composites (MICs) typically use Al as fuel and transition metal oxides as oxidizers , while their reactivities are hindered by the inert Al 2 O 3 passivation layer on the surface of Al particles . Recently, transition metal fluorides have emerged as novel fluorine-containing oxidizers for promoting the reactivity of metal fuels through interfacial fluorination of oxide layer . In this work, nanosized CoF 2 and Co 3 O 4 were prepared through pyrolysis of CoF 2 ·4H 2 O precursor using different calcination conditions. To investigate the function of CoF 2 in reaction and the influence of CoF 2 content on reactive performances, a series of MICs composed of n-Al, Co 3 O 4 , and CoF 2 were prepared through ultrasonic dispersion method. Thermal analysis indicated that Al/CoF 2 composite had significantly higher specific heat release (2.30 kJ/g) than that of Al/Co 3 O 4 composite (1.45 kJ/g), and CoF 2 facilitated the occurrence of exothermic reaction at a relatively lower temperature. AlF 3 was found as main reaction products of Al/CoF 2 at 650 °C, and AlF 3 sublimes at the temperature above 850 °C. Although the pressure output and flame intensity of Al/CoF 2 composite is lower than that of Al/Co 3 O 4 composite, hybrid Al/Co 3 O 4 /CoF 2 composites with 20 %–35 % CoF 2 showed significantly enhanced energetic performances compared with sole Al/Co 3 O 4 , suggesting that CoF 2 can function as an effective reaction modifier.
研究领域:
材料科学
·
含能材料
·
燃烧化学
·
纳米材料
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LANGMUIR
·
2026
·
IF 4.4
Dang Chunlei,Jiang Jing,Zhao Lin,Zhang Yagang
The
anthropogenic acceleration of the nitrogen cycle has exacerbated
nitrate contamination in water bodies, posing threats to both ecological
balance and public health. Conventional physicochemical separation
and biological denitrification technologies suffer from high costs,
secondary pollution, or resource wastage. The electrochemical nitrate
reduction reaction (NO 3 RR) offers a promising route to
convert nitrate into value-added ammonia, combining environmental
remediation with resource recovery. However, its application is hindered
by sluggish multielectron transfer kinetics and competition from the
hydrogen evolution reaction (HER). The purpose of this study is to
develop a high-performance NO 3 RR electrocatalyst with precise
regulation of metal ion distribution by EA, to promote the metal-polyphenol
self-assembly system from the perspective of ligand engineering, and
to provide new insights for the rational design of advanced heterogeneous
electrocatalysts. Building on the demonstration that the metal-polyphenol
assembly strategy enhances the catalytic performance of Co 3 O 4 , we further introduced ellagic acid (EA), a small-molecule
polyphenol, to coordinate and self-assemble with transition metal
ions of different valence states (Fe 3+ , Ni 2+ , Cu 2+ ). A series of EA-M/Co 3 O 4 (M
= Fe, Ni, Cu) catalysts was constructed to investigate the effects
of polyphenol molecular structure and metal substitution mode on the
structure and performance of Co 3 O 4 . The results
show that the system exhibits excellent catalytic activity: EA-Cu/Co 3 O 4 achieves a Faradaic efficiency of 96.83% at
−0.3 V vs RHE and an NH 3 yield of 279.43 μmol
h –1 cm –2 at −0.5 V vs RHE.
Furthermore, density functional theory (DFT) calculations elucidate
the NO 3 RR mechanism on EA-Cu/Co 3 O 4 . Cu 2+ doping modulated the electronic structure, enhanced
the adsorption of reactants, and thereby promoted the NO 3 RR process.
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Nature Communications
·
2026
·Vol. 17
·期 1
·6080
·
IF 18.1
Zhangsun Hui,Hu Rui,Xu Liguang,Xu Chuanlai,Kuang Hua,Hao Changlong
Herein, we report D -/ L -penicillamine-mediated magnesium oxide-doped cobalt oxide nanoparticles that exhibit strong mirror-image circular dichroism signals ( ~ 102 mdeg at ~800 nm) and function as effective near-infrared-driven photocatalysts for the enantioselective hydroxylation of tyrosine to dihydroxyphenylalanine. The D -nanoparticles demonstrated pronounced enantioselectivity, consuming 92.48% of L -tyrosine versus only 53.85% of D -tyrosine. Magnesium incorporation proves essential, increasing catalytic activity by 22.78 percentage points relative to undoped cobalt oxide nanoparticles. Mechanistically, Mg incorporation modulates the electronic structure to induce surface oxygen vacancies, which act as electron bridges to facilitate oxygen activation, significantly lowering the reaction barrier. Molecular dynamics simulations further unveil an inverse affinity-activity relationship, where heterochiral pairs enable efficient catalytic turnover through weaker, transient single hydrogen bonds, whereas high-affinity homochiral pairs are sequestered in non-productive states via rigid dual hydrogen bonds. This work establishes a distinct paradigm for rational catalyst design, balancing binding affinity with catalytic mobility.
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PubMed
高影响因子
ACS ES&T Engineering
·
2026
·
IF 6.3
Minghui Chen,Yanxia Gao,Haiqiang Wang,Zhongbiao Wu,Xuanhao Wu
Abstract Photothermal catalysis offers a light-driven route for N2O abatement by coupling broadband light harvesting with catalytic surface reactions. Here, spinel Co3O4 catalysts were prepared by calcining at 400, 500, and 600 °C (denoted as Co3O4-400, Co3O4-500, and Co3O4-600, respectively). This temperature-controlled synthesis preserved the spinel framework while modulating the local bonding environment surrounding the Co centers. Among the three catalysts, Co3O4-500 exhibited a relatively less-coordinated octahedral Co–O–Co environment, accompanied by modest surface Co2+ enrichment. Light-assisted N2O temperature-programmed desorption showed that Co3O4-500 retained a larger population of thermally stable N2O-related species, while in situ infrared spectroscopy revealed more rapid attenuation of the bands assigned to N–N- and N–O-related vibrations under illumination. Temperature-matched controls further showed that its enhanced activity could not be explained by macroscopic catalyst-bed heating alone. Accordingly, Co3O4-500 achieved 93.5% single-pass N2O conversion and a decomposition rate of 40.82 mmol g–1 h–1 at 1.81 W cm–2 under broadband irradiation. These results associate the photothermal activity of Co3O4 with its local Co–O coordination environment and identify coordination regulation through controlled thermal treatment as a strategy for designing non-noble-metal catalysts for N2O abatement.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yongfeng Li,Xiangru Zhu,Xiaowen Zhang,Jinhua Zhang,Yanzhen Liu
The increasing demand for high-energy–density, customizable Micro-Supercapacitors (MSCs) is driven by the rapid miniaturization, integration, and smart functionalities of electronic devices. The use of 3D printing technology in fabricating high-performance energy storage electrodes opens up novel opportunities for portable and micro-device applications. Through a simple solution reduction method, NaBH 4 is used to adjust the electronic structure of Co 3 O 4 , producing defects rich in oxygen vacancies (Ovs), increasing electroactive sites, reducing resistance, and thus improving the performance of supercapacitors. By mixing with graphene oxide in a certain proportion to prepare 3D printing ink, a three-dimensional conductive network is formed. In this work, the Micro-Supercapacitor (MSC) fabricated via 3D printing technology demonstrates excellent electrochemical performance. It achieves a high areal specific capacity of 715.6 mF cm −2 at a current density of 1 mA cm −2 . After 10,000 cycles at a high current density of 9 mA cm −2 , it retains 92.5 % of its initial capacity. Additionally, it delivers an impressive energy density of 254.4 µWh cm −2 at a power density of 800 µW cm −2 . Mesenchymal stem cells fabricated via 3D printing offer a transformative approach for developing next-generation wearable electronics.
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CHINESE JOURNAL OF CHEMISTRY
·
2016
·Vol. 35
·期 1
·35-40
·
IF 1.872
Xuan Shao,Tao Zhang,Zhaoyin Wen
Conventional binders in the cathode of Li-O 2 batteries are insulated, and integrate with the catalyst and the conducting carbon-support by physical mixing. This limits the transfer of electrons, degrades the cathode structure due to swelling, and finally leads to capacity fading and is deleterious to cycleability. In this study, we realized, for the first time, a one-step fabricated Co 3 O 4 -PPy cathode characterized by an in-situ formed conductive polymer binder. The functional binder, polypyrrole (PPy), was synthesized through electrical method, which acted as both the binder and supporting material in the Li-O 2 battery. Based on the conductive property of PPy, we obtained the Co 3 O 4 -PPy@Ni electrode via the process of CV electro-deposition. This method results in uniform distribution of Co 3 O 4 nanoparticles and can simplify the preparation process of the air cathodes. The Li-O 2 battery with the Co 3 O 4 -PPy@Ni cathode can discharge/charge for over 30 cycles under the limited specific capacity of 1000 mAh/g. The cycleability and impedance spectra of the Li-O 2 battery with the functional binder of PPy are superior to the battery with conventional binders.
研究领域:
材料科学
·
电化学
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Junyu Xiao,Zhengxiang Zhu,Guoqiang Zhang,Haoyu Li,Yongliang Li,Xiangzhong Ren,Peixin Zhang,Hongwei Mi
To solve the low conductivity and huge volume change of cobalt-based anode, the tuneable Co 3 O 4 structure is constructed through a template-free hydrothermal strategy and calcination under different atmosphere. Multi-shelled Co 3 O 4 (MS-Co 3 O 4 ) and pomegranate-like Co 3 O 4 encapsulated in carbon (CS-Co 3 O 4 @C) are fabricated from the same micron-sized cobalt-based polymeric precursor. MS-Co 3 O 4 manifests a capacity of 1195 mAh·g −1 at a current density of 200 mA·g −1 and delivers an initial coulombic efficiency (ICE) of 80.3%. In addition, CS-Co 3 O 4 @C delivers a reversible capacity as high as 676 mAh·g −1 at 2000 mA·g −1 after 500 cycles. Such high capacity, remarkable cycling and rate performances are attributed to hollow multi-shelled structure and carbon network skeleton, which promote the initial coulombic efficiency, relieve volume change and facilitate the migration of Li-ion.
研究领域:
材料科学
·
能源存储
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Beiyang Guo,Jianfeng Ma,Yichao Shi,Kewen Zheng,Minghong Wu,Guofa Ren,Sridhar Komarneni
Here in, a system of Co 3 O 4 /CoO catalyst activated with the aid of bisulfite (NaHSO 3 ) was established for the decomposition of methylene blue (MB). The Co 3 O 4 /CoO material was designed by a two-step uniform precipitation and calcination method and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) spectroscopy to detect the crystallinity, morphology, magnetic ability, element valence and the different types of free radicals, respectively. The efficient degradation of MB relies on the synergistic effect between the Co 3 O 4 /CoO catalyst and bisulfite (NaHSO 3 ) to generate some strongly oxidizing radicals, which could achieve a MB degradation rate of 90.7% within 40 min using this novel system. Additionally, the ferromagnetic property of Co 3 O 4 /CoO catalyst is expected to supply an excellent magnetic separation ability to help separate the solid catalyst from the aqueous solution. The novel catalyst system of Co 3 O 4 /CoO/NaHSO 3 may serve as a promising new system for wastewater treatment.
研究领域:
环境科学
·
催化化学
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JOURNAL OF MOLECULAR RECOGNITION
·
2019
·Vol. 33
·期 3
·e2820
·
IF 1.919
Jiajia Han,Longfei Miao,Yonghai Song
Co-Co 3 O 4 /carbon nanotube/carbon foam (Co-Co 3 O 4 /CNT/CF) nanocomposites were prepared by soaking melamine foam into a solution of Co(NO 3 ) 2 ·6H 2 O, followed by calcination in N 2 and air in sequence. The obtained Co-Co 3 O 4 /CNT/CF nanocomposites were characterized with scanning electron microscopy and cyclic voltammetry. It was found that Co 3 O 4 nanoparticles were grown on the external of CF successfully, while CNTs were grown on the surfaces of CF in a large amount, which further improved the electrical conductivity of the. The prepared Co-Co 3 O 4 /CNT/CF nanocomposites were then used to construct nonenzymatic sensor to detect glucose in alkaline solution. The sensor showed detection range from 1.2 μM to 2.29 mM with a detection limit of 0.4 μM (S/ N =3) and a high sensitivity of 637.5 μA −1 cm −2 . The developed sensor also showed an instant response, favorable reproducibility, and high selectivity. The results attest that Co-Co 3 O 4 /CNT/CF composites have great potential in the development of nonenzymatic sensors for glucose.
研究领域:
材料科学
·
电化学
·
传感器与生物传感器
·
纳米技术
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高影响因子
危险品化学品经营许可证（带存储）