RSC Advances
·
2016
·Vol. 6
·期 94
·91791-91797
·
IF 3.289
Jia-yi Pu,Jin-quan Wan,Yan Wang,Yong-wen Ma
In this study, Co-based MOF with a 2D structure, 3D microrod structure and 3D nano-dodecahedral structure was synthesized by the coordination of cobalt ions and different organic ligands. Then, Co3O4, which was derived from these Co-based MOFs, was used to activate oxone for RhB degradation. It was found that the morphology and structure of the templates can significantly influence the formation of the nano Co3O4 products, which has an indirect effect on the catalytic ability of the resulting Co3O4 for oxone to degrade RhB. Among the products, nano-sphere Co3O4, which was derived from a template with a 3D nano-dodecahedral structure (ZIF-67) can effectively activate oxone to degrade RhB. Under neutral conditions, the rate constant of the degradation of RhB (0.1 mM) was 0.0509 min−1 with 50 mg L−1 catalyst and 1.0 mM oxone based on first-order kinetics. In addition, the influence of a series of parameter factors (pH, the dosage of catalyst and oxone) on the catalyst was also studied. Low cobalt ion dissolution (0.04 mg L−1 at pH = 3, <0.01 mg L−1 at pH = 7) and good recyclability (degradation rate of RhB after 5 cycles: close to 96%, 89% at pH = 7, pH = 3) further proved that the as-prepared Co3O4 can be used as a promising catalyst.
✓ 已验证
DOI
高影响因子
Nano Research
·
2017
·Vol. 10
·期 10
·3457-3467
·
IF 7.354
Sun Yan,Huang Fangzhi,Li Shikuo,Shen Yuhua,Xie Anjian
A Co-based metal-organic framework (Co-MOF) with a unique three-dimensional starfish-like nanostructure was successfully synthesized using a simple ultrasonic method. After subsequent carbonization and oxidation, a nanocomposite of nitrogen-doped carbon with a Co 3 O 4 coating (Co 3 O 4 @N-C) with a porous starfish-like nanostructure was obtained. The final hybrid exhibited excellent lithium storage performance when evaluated as an anode material in a lithiumion battery. A remarkable and stable discharge capacity of 795 mAh·g −1 was maintained at 0.5 A·g −1 after 300 cycles. Excellent rate capability was also obtained. In addition, a full Co 3 O 4 @N-C/LiFePO 4 battery displayed stable capacity retention of 95% after 100 cycles. This excellent lithium storage performance is attributed to the unique porous starfish-like structure, which effectively buffers the volume expansion that occurs during Li + insertion/deinsertion. Meanwhile, the nitrogendoped carbon coating enhances the electrical conductivity and provides a buffer layer to accommodate the volume change and accelerate the formation of a stable solid electrolyte interface layer.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Fengdong Qu,Tiju Thomas,Bingxue Zhang,Xinxin Zhou,Shendan Zhang,Shengping Ruan,Minghui Yang
Hollow nanostructures derived from metal-organic frameworks have attracted considerable interest for prospective applications in gas separation/storage, drug delivery, catalysis device and gas sensors. Herein, porous hollow nanostructures, namely Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures, are prepared through a self-sacrificing template method. The method includes the synthesis of zeolite imidazolate frameworks-67 self-sacrificing template and then transformation into Co/Zn-ZIF@Co-Zn layered double hydroxides precursor. Finally, the Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures are obtained through thermal annealing of Co/Zn-ZIF@Co-Zn LDH precursor in air. The gas sensing investigations revealed that the Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures-based gas sensor exhibited high response (16.3–100 ppm) and selectivity towards acetone. Besides, enhanced gas sensing properties of Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures are observed when compared with Co 3 O 4 and ZnCo 2 O 4 hollow nanostructures. The excellent gas sensing characteristics of Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures might be attributed to their high porosity, large specific surface area, and heterostructure between Co 3 O 4 and ZnCo 2 O 4 .
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Zhijia Liao,Zhenyu Yuan,Hongliang Gao,Fanli Meng
In this study, porous sheet-like nanostructured Co 3 O 4 -CuO-CuOHF composites with great n-butanol sensing properties were synthesized by the biotemplate method and hydrothermal method . The effect of various contents of Co 3 O 4 -CuO-CuOHF sensor performance was systematically investigated, in which the best performance was achieved for the composite with 0.03 g Co 3 O 4 addition. The response of the best content Co 3 O 4 -CuO-CuOHF composite sensor to 100 ppm n-butanol at 180 ℃ is 120, which is 8 times higher than that of the CuO-CuOHF sensor. The composite sensor has excellent selectivity for n-butanol and responds 3.75–25 times higher to n-butanol than other target gases. It is detectable up to 500 ppb n-butanol and has potential promise for low concentration detection. Furthermore, it has outstanding stability and resistance to humidity. The gas sensing mechanism was analyzed by UV–visible diffuse reflectance spectroscopy, EPR oxygen vacancies and X-ray photoelectron spectroscopy, which indicated that the abundant oxygen vacancies , the physical adsorption of polar hydroxyl bonds, the electronegative fluorine substitution and the special microstructure of the composite contributed to its gas-sensitive performance.
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2014
·
IF 1.968
Zhili Chen,Shihua Chen,Yonghe Li,Xiaolei Si,Jun Huang,Sylvain Massey,Guangliang Chen
In this paper, we reported a recyclable and highly active porous catalyst of titanate nanowires (TNWs) coated with well-distributed Co 3 O 4 nanoparticles (NPs) (Co 3 O 4 /TNWs). Sodium ions of TNWs were exchanged with hydrogen ions in the dilute nitric acid, and this protocol was very suitable for capturing cobalt ions. X-ray diffraction (XRD) demonstrated the existence of Co 3 O 4 phase with unique lattice planes, such as (2 2 0), (3 1 1) and (5 1 1). Electron microscopes (FE-SEM and TEM) indicated that the Co 3 O 4 NPs with an average diameter of 22 ± 3 nm were coated uniformly on TNWs surface (average diameter: 37 ± 5.5 nm), and the Co 3 O 4 NPs mainly exposed their (2 2 0) and (2 2 2) active planes. XPS analysis confirms the formation of Co 3 O 4 phase by the presence of Co 2p peaks at 780.1 eV (2p 3/2) and 795.5 eV (2p 1/2). Methylene blue (MB) and other organic dyes (rhodamine B (RhB) and methyl orange (MO)) were chosen as target compounds for catalytic degradation under indoor scattering light. Compared to the original Co 3 O 4 /TNWs catalyst, the catalytic efficiency of nanoscaled catalyst with oxone for MB was about 15 times higher, and the MB solution (10 mg L −1 ) was completely degraded within 8 min. The catalytic activity of recycled catalyst used in the sixth run still remained very active, and the degradation time for MB was only 16 min. The nanosized catalyst also had a high activity for dyes of RhB (10 mg L −1 ) and MO (10 mg L −1 ), as the degradation efficiencies of RhB and MO after 10 min of contact time were about 90.2% and 92.6%, respectively.
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 30
·1902280
·
IF 10.856
Xijun Wei,Wanping Hu,Huarong Peng,Yuli Xiong,Peng Xiao,Yunhuai Zhang,Guozhong Cao
High energy and efficient solar charging stations using electrochemical capacitors (ECs) are a promising portable power source for the future. In this work, two kinds of metal-organic framework (MOF) derivatives, NiO/Co 3 O 4 microcubes and Fe 2 O 3 microleaves, are prepared via thermal treatment and assembled into electrochemical capacitors, which deliver a relatively high specific energy density of 46 Wh kg −1 at 690 W kg −1 . In addition, a solar-charging power system consisting of the electrochemical capacitors and monocrystalline silicon plates is fabricated and a motor fan or 25 LEDs for 5 and 30 min, respectively, is powered. This work not only adds two novel materials to the growing categories of MOF-derived advanced materials, but also successfully achieves an efficient solar-ECs system for the first time based on all MOF derivatives, which has a certain reference for developing efficient solar-charge systems.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
可再生能源
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Baoli Wang,Yuhang Zhang,Yijun Zhang,Yan Deng,Feng Yang
Uniform Co 3 O 4 nanoparticles with abundant active sites loaded on the N-doped graphite carbon was prepared. • Co 3 O 4 /NC based electrochemical sensor was fabricated to detect chloramphenicol in environmental samples. • The proposed sensor presents wider linear ranges and lower detection limit. Chloramphenicol (CAP), a typical broad-spectrum antibiotic, poses considerable threats to human health due to its residues transferring through the food chain. Thus, the development of fast and highly sensitive detection technologies for CAP is of great practical importance. Herein, a Co 3 O 4 @NC nanocomposite was prepared via a controllable thermal decomposition-oxidation approach. This composite was further employed as an electrode modification material to construct a novel electrochemical platform, which was designed for the quantitative detection of CAP. Characterizations revealed that Co 3 O 4 nanoparticles were wrapped in the carbon sheet in the prepared Co 3 O 4 @NC nanocomposite with a specific surface area of 285.5 m 2 /g, along with affluent oxygen vacancy active sites. Electrochemical performance measurements indicated that Co₃O₄@NC exhibits excellent electrocatalytic reduction activity toward CAP. Under optimized experimental conditions, differential pulse voltammetry (DPV) was employed to detect CAP, and the sensor emerged a linear detection range of 0.1–500 μmol/L with a low detection limit of 12.4 nmol/L, outperforming most electrochemical sensors for CAP reported in previous papers. Additionally, it owned good selectivity, as the relative standard deviation (RSD) of the CAP detection signal was less than 5% even as the other familiar interfering species were concomitant. It also demonstrated remarkable stability, repeatability, and anti-interference ability. When applied to the actual determination of CAP residues in environmental samples, the sensor yielded recovery rates of 97.02%–104.23% for marine sediment samples and 99.77%–104.06% for seawater samples, with all RSD values below 5.1%. This study realizes the structural and performance regulation of Co₃O₄ materials through a simple and feasible strategy, providing a new sensing platform for the rapid detection of trace CAP and offering novel insights into the application of metal oxides in electrochemical sensing fields. Download: Download high-res image (126KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.5
Qiaochu Zhou,Yiyang Wang,Zhe Zhang,Chi Zhang,Fang Li,Qiming Li
Hydrogen production from NaBH 4 hydrolysis is a promising approach to on-site H₂ supply, but its practical use is constrained by insufficient catalytic activity and stability of current catalysts. Here Co 3 O 4 catalysts doped with different transition metal ions (W, Ni, Cu and Mo) were prepared via a combined citric-EDTA acid complexation and applied for H 2 generation via NaBH 4 hydrolysis. Effects of various transition metal ions on crystal structure, surface morphologies, and catalytic performance of Co 3 O 4 catalysts were systematically investigated. It can be found that minor doping of transition metal ions does not change the bulk spinel structure of Co 3 O 4 catalysts but can obviously impact its crystallinity and surface morphologies. Moreover, Co 3 O 4 catalysts exhibit distinct induction periods before reaching maximum catalytic activity, with the duration dependent on the type of metal dopants. Notably, Ni-doped Co 3 O 4 catalysts exhibit the highest catalytic activity of 2320 mL·min -1 ·g -1 and a relatively low activation energy of about 25.27 kJ·mol -1 . By contrast, Cu doping exerts a negative effect on the stability of pristine Co 3 O 4 . The catalytic performance follows the order Ni > Mo > W > Cu, with Cu‑doped Co 3 O 4 showing a significantly degraded activity of only 1380.4 mL·min -1 ·g -1 . Meanwhile, an excessively high doping content results in decreased catalytic activity for all samples. This work clarifies the correlation between transition metal doping and Co 3 O 4 optimization, offering theoretical guidance for rational design of high-performance NaBH 4 hydrolysis catalysts.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Jingjing Liu,Xiaoxin Yang,Jingcui Huang,Li Li,Yaping Ding,Minmin Liu,Xiao Wang
A novel NiMoO 4 /Co 3 O 4 /NF was synthesized via two-step hydrothermal and calcination methods. • The interfaces in Co 3 O 4 /NiMoO 4 core@shell heterostructure facilitates charge transfer and exposes substantial active sites for HER/OER. • The catalyst achieves impressive HER ( η 10 = 121 mV), OER ( η 100 = 202 mV) performance, couple with prolong stability (>120 h) in overall water splitting. • DFT calculations illustrate oxygen vacancies and interfaces activate spin-selective charge transfer, downshift d-band center and optimize adsorption ability of critical intermediates in OER. The synthesis of highly actively bifunctional electrocatalysts with robust durability for hydrogen production by overall water splitting remains constrained by sluggish oxygen evolution reaction/hydrogen evolution reaction (OER/HER) intrinsic kinetics and incompatible reaction environments. Herein, an oxygen vacancy-enriched NiMoO 4 /Co 3 O 4 /NF heterostructure catalyst with abundant tailored interfaces was fabricated via a two-step hydrothermal-calcination strategy through in situ growing NiMoO 4 nanosheets on Co 3 O 4 nanowires-coated nickel foam. The as-prepared catalyst delivers exceptional bifunctional activities in alkaline media (OER: η 100 = 202 mV, HER: η 10 = 121 mV). In the overall water-splitting system, it requires applied voltages of 1.51 V (@ 10 mA cm⁻ 2 ) and 1.73 V (@ 100 mA cm⁻ 2 ), and exhibits prolonged stability (120 h) by addressing Mo leaching. DFT calculations reveal a spin-selective charge transfer driven by the spin-state mismatch between low-spin Co 3+ and high-spin Ni 2+ at the interface. This mismatch along with oxygen defect promotes electron transfer from Co to Ni, filling the antibonding e g orbitals of Ni sites to reduce Ni coordination, downshifting the d -band center and optimizing the intermediates adsorption ability in OER. This study furnishes advanced perspectives on interfacial synergistic effects and oxygen vacancies in catalytic reactions, thus establishing a significant foundation in renewable energy conversion. A novel oxygen vacancy-rich NiMoO 4 /Co 3 O 4 /NF heterostructure with tailored interfacial architecture was fabricated via a two-step hydrothermal-calcination approach. The catalyst exhibits impressive OER ( η 100 = 202 mV) and HER ( η 10 = 121 mV) performance with prolonged stability (>120 h) in overall water splitting. DFT calculations reveal that oxygen vacancy-assisted interfacial spin configuration collaboratively regulates electron redistribution and d -band center, thus reducing kinetic barriers for OER. Download: Download high-res image (157KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xinyu Liu,Yimeng Wang,Jinqi Wu,Donggang Li,Mingyu Yao,Jindou Huang,Bowen Ren
Ce-doped Co 3 O 4 nanowire arrays with interfacial RuO 2 were constructed on Ti mesh. • The optimized 5-Ru-CoCe/Ti shows 198 ± 15 mV at 10 mA cm −2 for acidic OER. • The self-supported electrode delivers stable operation for over 200 h in 0.5 M H 2 SO 4 . • Ce doping and RuO 2 coupling tune the electronic structure and accelerate OER kinetics. Co-based catalysts have emerged as highly promising electrocatalysts for the acidic oxygen evolution reaction (OER). However, their elevated surface energies lead to instability and inefficacy, particularly at high current densities, impeding their utility in large-scale application. Herein, we report a self-supported electrode composed of interfacial RuO 2 -decorated Ce-doped Co 3 O 4 nanowire arrays on Ti mesh, fabricated through hydrothermal growth, annealing, and cyclic impregnation-calcination. The optimized 5-Ru-CoCe/Ti catalyst delivers an overpotential of only 198 ± 15 mV at 10 mA cm −2 , a Tafel slope of 103.2 mV dec −1 , and stable operation for over 200 h in 0.5 M H 2 SO 4 . Experimental characterizations and density functional theory calculations reveal that Ce doping and RuO 2 /Co 3 O 4 interfacial coupling modulate the local electronic structure and promote interfacial electron redistribution. This electronic modulation enhances –OH adsorption and accelerates OER kinetics, thus lowering the energy barrier for the *O to *OOH conversion. These findings demonstrate that interfacial electronic structure engineering is an effective strategy for designing low-noble-metal electrocatalysts with high activity and durability for acidic water oxidation. Download: Download high-res image (123KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Xiaoli Liu,Jianbei Zhang,Yan Cheng,Jiangning Shi,Jianjun Li,Yongjun Liu
Co 3 O 4 /CeO 2 catalyst with rich oxygen vacancies was fabricated. • Co 3 O 4 /CeO 2 catalyst achieves 100% NO x conversion within 225 −400 °C under oxygen-enriched conditions. • The heterostructure interface induces a strong Ce(4 f)–O(2p)–Co(3d) orbital coupling and triggers electron redistribution. • The heterostructure and oxygen vacancies ensured the pathway less affected by O 2 . The development of efficient and low-cost catalysts for the selective catalytic reduction of NO by CO (CO-SCR) under aerobic conditions remains a critical challenge. Heterostructure catalysts, particularly those engineered at the interface between rare earth and transition metal oxides, represent a promising frontier for the CO-SCR reaction. However, a deep understanding of their catalytic mechanism and active sites remains limited. In this work, the Co 3 O 4 /CeO 2 heterostructure catalyst with dispersed Co 3 O 4 nanoparticles on CeO 2 is designed and synthesized via a two-step precipitation method, serving as a model system. The optimized catalyst exhibits superior performance with 100% NO conversion across a wide temperature window (225–400 °C) and robust thermal stability, outperforming pure CeO 2 . Advanced spectral characterization and density functional theory calculations reveal that the heterostructure interface induces a strong Ce(4 f)-O(2p)-Co(3d) orbital coupling, which triggers electron redistribution. This unique interface environment optimizes the adsorption and activation of NO molecules and lowers the N-O bond cleavage energy, thereby enabling the high catalytic performance. This work offers a facile synthesis strategy for designing high-performance heterostructure catalysts and provides fundamental insight into the interface-driven mechanism for CO-SCR applications. Download: Download high-res image (215KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Yang Liu,Meng Yang,Zhanhong Ma,Miaomiao Li,Fanli Meng
Precise detection of trace acetone is crucial for industrial production safety, early disease screening, and other fields. However, semiconductor sensors face challenges in meeting the growing demand for high sensitivity and low detection limits for acetone gas due to poor detection capabilities for weak currents and low sensing activity at reaction sites. In this work, we regulate the formation rate of ZIF-67 and induce its transformation into α-Co(OH) 2 through ion exchange and etching processes on its surface, resulting in the topological formation of Co 3 O 4 porous ultrathin hierarchical nanosheets. The ultrathin nanosheets enable efficient carrier transport along the two-dimensional plane. Owing to a thickness of approximately 5 nm, the hole accumulation layers are able to merge entirely, resulting in electrical characteristics dominated by surface effects. In addition, abundant oxygen vacancies markedly enhance the chemical adsorption ability toward acetone, while the surface-rich Co 2 + configuration significantly promotes the catalytic activity of the Co 3 O 4 surface. Furthermore, the interconnected porous architecture combined with a high specific surface area (107.2 m 2 ·g −1 ) facilitates rapid gas transport and enhances adsorption efficiency. Consequently, the Co 3 O 4 porous ultrathin nanosheet-based sensor exhibits excellent sensing performance for acetone detection, achieving a response of 80.3 at 100 ppm, along with remarkable selectivity, repeatability, long-term stability, and a practical detection threshold down to 30 ppb (response of 1.12). This study proposes an effective approach for constructing Co 3 O 4 porous ultrathin hierarchical nanosheets and modulating gas-solid interface interactions through defect engineering and surface engineering, offering valuable insights for the development of high-performance acetone sensors.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）