SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Ge Song,Zibin Lin,Jiayi He,Wenping Shu,Shikun Wei,Minghua Zhou
Electrocatalytic dehalogenation provides an efficient and sustainable strategy for cleaving carbon-halogen bonds, yet its practical efficiency is often limited by insufficient catalytic activity alongside inherent mass transfer constraints. To address this challenge, this study focused on both the catalyst and reactor levels. Herein, a non-noble metal catalyst, oxygen vacancy-rich Co 3 O 4 /g-C 3 N 4 (O v -CoCN), was developed and integrated into a flow-through reactor for efficient electrocatalytic reductive dehalogenation, which significantly enhanced mass transfer and reaction kinetics. Using the halogenated antibiotic thiamphenicol (TAP) as the target pollutant, the system demonstrated outstanding degradation efficiency under continuous-flow operation. Under optimal conditions with a catalyst loading of 7.1 mg/cm 2 , pH 5, a flow rate of 2 mL/min, and a current density of 7 mA/cm 2 , nearly complete removal of 10 mg/L TAP was achieved. The introduced oxygen vacancies, engineered to modulate the electronic structure of CoCN, played a critical role in facilitating electron transfer and promoting the generation of the key reactive species, atomic hydrogen (H*). The catalyst exhibited excellent application potential, maintaining high removal efficiency across a broad pH range (3−11) and pollutant concentrations (1–50 mg/L), and showed remarkable stability over a 12-h continuous operation. This work provides new insights into the design of both reactors and catalysts for efficient electrocatalytic dechlorination.
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高影响因子
APPLIED SURFACE SCIENCE
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2019
·
IF 5.155
Youcai Ding,Yuqi Peng,Shuanghong Chen,Zhaoqian Li,Xianxi Zhang,Polycarpos Falaras,Linhua Hu
2D nanosheets are attractive for energy conversion and storage because of their scale-dependent physical and chemical properties. However, nanosheets synthesized by liquid-phase method are easy to stack and it is difficult to obtain nanosheets with uniform dispersion and thickness. Here, a new strategy was developed to obtain uniformly dispersed 2D nanosheets. The regular dodecahedron structured ZIF-67 was employed as templates and NH 4 F was adopted as competitive units. 2D nanosheets of coordination polymers were induced vertically grow from the surface of ZIF-67, which effectively avoiding the stack of nanosheets. After carbonization , the obtained composites of Co 3 O 4 @carbon retained their original structure. The composites show excellent characteristics as the electrode of a supercapacitor . The capacitance of the NS-Co 3 O 4 @PC electrode is 940 F g −1 at a current density of 1 A g −1 , which is about 7 times than that of composite which derived from ZIF-67 under the same conditions. The most important is that the rate performance and cycling life were also improved as the result of hierarchical porous structure and good structure robustness. The method developed here may open up a novel and innovative approach to manipulate the structure of classical MOFs to obtain 2D nanosheets for a wealth of breakthrough applications.
研究领域:
材料科学
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能量存储
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纳米技术
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电化学
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超级电容器
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高影响因子
ACS Applied Energy Materials
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2018
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IF 0
Lin Long,Zhenzhong Lan,Zhixiong Han,Yunfeng Qiu,Weixing Zhou
Endothermic hydrocarbon fuel has many advantages as a cooling medium in hypersonic aircraft; however substantial application has been greatly hindered due to easy coking, uncontrollable gas products, and low heat sink issues. Catalytic cracking of hydrocarbon fuel has been regarded as one of the most effective ways to improve the heat sink via modulating the cracking pathway. The incipient-wetness impregnation method was selected to load Co salts in commercial ZSM-5 in a large-scale manner; subsequent calcination in Ar gas resulted in Co3O4 nanosheet wrapped HZSM-5 composites. Salinization treatment was adopted to facilitate the dispersion of catalyst in a nonpolar solvent. The ratio of Brönsted/Lewis acidity decreased from 8.00 to 2.79 after modification by Co3O4 nanosheets. The synergistically catalytic effect between Co3O4 nanosheets and ZSM-5 was beneficial to the generation of a larger gas production rate with higher content of alkene, and thus resulting in a higher heat sink than benchmarked fuels. Catalytic cracking of n-decane (C10) in the presence of 0.1 wt % Co3O4 nanosheets@ZSM-5 could yield a heat sink as high as 4.64 MJ/kg at 758 °C, much higher than those of bare ZSM-5 (2.99 MJ/kg at 687 °C) and thermal cracking of C10 (3.77 MJ/kg at 728 °C). Meanwhile, the smart combination of Co3O4 nanosheets and commercial ZSM-5 could effectively suppress the coke deposition on the external surface of composites, thus resulting in efficient catalytic cracking at elevated temperatures for obtaining a higher heat sink.
研究领域:
催化化学
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能源材料
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化学工程
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石油炼制
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航空航天推进
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LANGMUIR
·
2025
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IF 3.9
Jun Yu,Yi Liu,Mengqi Wang,Xiaoxin Guo,Xingyu Zhang,Yihang Dong,Jiawei Yan,Keqin Zhang,Yuqing Liu
Hydrophilic modification of materials is crucial for optimizing the performance of flexible supercapacitors, which are promising energy-storage devices for flexible and wearable electronics. However, enhancing the wettability of coaxial electrospun membranes to facilitate the uniform growth of active materials and improve electrochemical performance remains a key challenge. Herein, we propose a hydrophilic modification strategy using ethanolamine (MEA) heat treatment, which significantly enhances the wettability of coaxial electrospun CNT/MOF-5/PAN/PVDF (C-MNF) membranes and promotes the uniform in situ growth of Co3O4 nanoneedles. Characterization results reveal that hydrophilic modification improves the penetration and diffusion of Co2+ ions within the substrate, optimizing the nucleation and growth environment for Co3O4 crystals. By integrating multiple mechanisms such as Zn2+/Co2+ ion exchange, Fe3+-induced oxidation, and spontaneous crystal transformation, the material’s interface structure and electrochemical performance were synergistically enhanced. The resulting Co3O4@C-MNF composite electrode achieved a mass-specific capacitance of 310 F g–1 at 0.5 A g–1, with good rate performance (250 F g–1 at 10 A g–1) and low interfacial resistance (∼51 Ω). A symmetric supercapacitor device constructed with the modified material exhibited a maximum energy density of 4.94 Wh kg–1, high cycling stability (94.2% capacity retention after 8000 cycles), and stable output in various bending states. These results highlight the potential of the device for flexible, wearable energy storage applications and provide an approach and material system for the design of high-performance flexible supercapacitors.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122268
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IF 7.5
Mengxiao Liu,Li Zeng,Hanbin Wu,Yiyang Xu,Yang Yu
The widespread occurrence of antibiotic resistance genes (ARGs) in water has posed severe risks to human health and the ecosystem. In this study, Co 3 O 4 @BTO was synthesized and employed as a particular electrode in a three-dimensional (3D) electro-activation of peroxymonosulfate (PMS) process. The proposed system showed an obvious synergistic effect in ARGs elimination with lower energy consumption in comparison to the individual application of PMS, Co 3 O 4 @BTO or the electrochemical process. Approximately a 4.1-log reduction in ARGs can be achieved under the optimal operation conditions of 0.1 g/L Co 3 O 4 @BTO, 0.3 mM PMS and a current density of 9 mA/cm 2 . Due to the electrochemical activation and heterogeneous catalysis of Co 3 O 4 @BTO, the enhanced PMS activation efficiency was responsible for the effective elimination of ARGs. Based on quenching tests and electron paramagnetic resonance (EPR) analysis, the superoxide radical (· O 2 − ) played the dominant role in the elimination of ARGs, while other reactive oxygen species (ROS) such as S O 4 · − , · OH , and 1 O 2 were also involved. The system demonstrated a good practical application potential in ARG-contaminated water, providing an alternative approach for the control of ARGs dissemination.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Jiqiu Zhang,Wei Liu,Wenkai Teng,He Li,Honghui Ou,Guidong Yang
A high-aspect-ratio Ag/Co 3 O 4 nanowire array catalyst is fabricated via in-situ growth and interfacial engineering, forming a tandem catalytic system with synergistic Ag and Co active sites. • Ag loading promotes interface electron transfer and increases the proportion of Co 3+ to optimize the reaction pathway and suppress hydrogen evolution reaction. • The tailored interface provides abundant active sites and fast kinetics, leading to a record 94.2% FE at 800 mA·cm -2 . • Maintains >90% FE at 1 A·cm -2 , showcasing unmatched stability for scalable application. Electrocatalytic conversion of nitrate (NO 3 - ) to ammonia (NH 3 ) offers an beneficial route for green NH 3 synthesis, yet challenges such as complex reaction pathways and uncoordinated adsorption and conversion of reactive species hinder the enhancement of reaction kinetics. In this study, a high-aspect-ratio Ag/Co 3 O 4 nanowire array catalyst was successfully fabricated on cobalt foam via an in-situ growth combined with an interfacial engineering strategy, constructing a tandem catalytic system with synergistic Ag and Co active sites. The results demonstrate that Ag loading promotes interface electron transfer and increases proportion of Co 3+ , which can promote yield improvement. Electrochemical tests show that in an H-cell, Ag/Co 3 O 4 achieves a Faradaic efficiency (FE) of 91.4% and NH 3 rate of 70.2 mg·h -1 ·cm -2 at −0.4 V vs . RHE. In a membrane electrode assembly (MEA) system, Ag/Co 3 O 4 exhibits a high FE of 94.2% at large-scale applicable current density of 800 mA·cm -2 and maintains over 90% FE even at 1000 mA·cm -2 , along with excellent stability. This work elucidates the core mechanism involving tandem catalysis and the synergistic enhancement via interfacial electron transfer regulating Co 3+ active center, providing a novel strategy for designing high-performance and robust catalysts for the electrochemical nitrate reduction reaction (NO 3 RR) and advancing this technology toward industrial application. Download: Download high-res image (518KB) Download: Download full-size image
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Heming Sun,Xiaonian Tang,Shuo Li,Ye Yao,Li Liu
The construction of the materials with one-dimensional (1D) hollow structure using Metal-organic frameworks (MOFs) as the templates has attracted much attention for applied in various fields. Herein, MOF-derived 1D Ru/Mo co-doped Co 3 O 4 hollow microtubes have been obtained via a simple solvothermal method . The as-synthesized samples are characterized by using XRD, FESEM , TEM , XPS, PL and BET. The sensing measurement reveals that when doping amount of Mo and Ru is 1% and 0.3%, the Co 3 O 4 sample exhibits the best sensing performance. Specially, 0.3% Ru/Mo-Co 3 O 4 sample exhibits high responses of 126–100 ppm TEA at a low operating temperature of 160 °C, which are about 18.5 times than that of pure Co 3 O 4 . Furthermore, it shows rapid response/ recovery speed (5 s/7 s), good selectivity and repeatability as well as excellent long-term stability. The good TEA sensing performance is attributed to the construction of 1D hollow architecture and synergistic effect of Ru/Mo co-doping. Thus, it is expected to be a promising sensing material for high-performance detection of TEA gas. In addition, this work provides an useful inspiration for preparation of MOF-derived materials with 1D hollow architecture for achieving excellent performance in various fields.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Jie Xu,Xiaowei Liu,Rui Li,Boxiong Shen,Zijian Zhou,Lidan Deng,Lei Liu,Xinbo Zhu
Converting CO 2 into renewable fuel via photocatalysis is of significance to solving the energy crisis and climate change. However, the limited electron transfer in single catalysts always limits the reduction reaction. In this work, a p-n heterojunction was constructed between Cr doped MgAl–LDH (abbreviated as LDH) and Co 3 O 4 for visible-light-driven fuel production. Since LDH and Co 3 O 4 both have the sufficient potentials to drive CO 2 photoreduction, the constructed type-II heterojunction is more favorable for electron utilization efficiency. The optimal Co 3 O 4 /LDH heterojunction exhibited the highest CO evolution rate of 7.42 μmol•g −1 •h −1 and a CO selectivity of 90.5% with TEOA as sacrificial agent . The further characterizations highlight that the addition of Co 3 O 4 greatly improves the light absorption and the heterojunction effectively promotes the reverse migration of electrons and holes. This work investigates and verifies the designed type-II heterojunction based on MgAl–LDH, which has the guidance for the design of heterojunction catalysts and promotes the practical application of MgAl–LDH in photocatalytic region.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Baoli Wang,Shuchang Luo,Yijing Ai,Yucen Yao,Siyue Zhang,Yuhao Huang,Xiaoping Zhang,Wei Sun
To enhance the catalytic activity of oxygen evolution reaction (OER), tremendous efforts have been contributed to tune the morphology, structure and component of the commonly used transition metal oxides electrocatalysts . Herein, hollow Co 3 O 4 nanocapsules/N-doped carbon (Co 3 O 4 /NC) composite was synthesized via combining a carbonization process and an oxidation route by employing biomass as carbon source. The obtained composite presents a porous hierarchical construction, in which hollow Co 3 O 4 nanocapsules with an average diameter of 60 nm are uniformly dispersed and anchored on the carbon carrier. Electrochemical measurements reveal that the resulted Co 3 O 4 /NC presents outstanding catalytic performance towards OER with only 328 mV to obtain the current density of 10 mA cm −2 along with a Tafel slope of 84 mV dec −1 , which are superior than those of benchmark catalyst RuO 2 . Besides, the influences of the loading amount of Co 3 O 4 and sintering temperature on OER performance are studied in detail. The outstanding catalytic activity can be ascribed to the typical hollow nanocapsules structure and abundant oxygen deficiency, which can afford a mass of catalytic active sites. Therefore, this work puts forward valuable reference for the design of high-efficiency biomass derived catalysts in the field of OER.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Haochang Chen,Shunzhe Zhang,Hao Liu,Kaifeng Wang,Yujie Chen,Hua Li,Xiaobiao Zuo,Hezhou Liu
Cobalt tetraoxide (Co 3 O 4 ) is regarded as a promising anode material for Li-ion batteries owing to its high theoretical capacity (890 mAh g −1 ), simple preparation, and controllable morphology. Nanoengineering has been proven to be an effective method for producing high-performance electrode materials . However, systematic research on the influence of material dimensionality on battery performance is lacking. Herein, we prepared Co 3 O 4 with various dimensionalities (one-dimensional (1D) Co 3 O 4 nanorod (NR), two-dimensional (2D) Co 3 O 4 nanosheet (NS), three-dimensional (3D) Co 3 O 4 nanocluster (NC), and 3D Co 3 O 4 nanoflower (NF)) using a simple solvothermal heat treatment method, and their morphologies were controlled by varying the precipitator type and solvent composition . The 1D Co 3 O 4 NR and 3D samples (3D Co 3 O 4 NC and 3D Co 3 O 4 NF) exhibited poor cyclic and rate performances, respectively, while the 2D Co 3 O 4 NS exhibited the best electrochemical performance . The mechanism analysis revealed that the cyclic stability and rate performance of the Co 3 O 4 nanostructures are closely related to their intrinsic stability and interfacial contact performance, respectively, and the 2D thin-sheet structure can achieve an optimal balance between the two, resulting in the best performance. This work presents a comprehensive study on the effect of dimensionality on the electrochemical performance of Co 3 O 4 anodes, providing a new concept for the nanostructure design of conversion-type materials.
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PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 23
·8572
·
IF 4.927
Wanning Xiong,Jie Ouyang,Xiaoman Wang,Ziheng Hua,Linlin Zhao,Mengyao Li,Yuxin Lu,Wei Yin,Gonggang Liu,Cui Zhou,Yongfeng Luo,Binghui Xu
Transition metal oxides (TMOs) can provide high theoretical capacitance due to the change of multiple valence states of transition metals. However, their intrinsic drawbacks, including poor electrical conductivity, lower energy density, and huge volume expansion, will result in the pulverization of electrode materials and restricted electrochemical kinetics, thus leading to poor rate capability and rapid capacity fading. Composite electrodes based on transition metal oxides and carbon-based materials are considered to be promising candidates for overcoming these limitations. Herein, we reported a preparation method of hybrid ZIFs derived Zn-doped Co3O4/carbon (Zn-Co3O4/C-230) particles semi-embedded in wood-derived carbon skeleton for integrated electrodes. A large specific surface area, excellent conductivity, and electrochemical stability provide a larger electrochemical activity and potential window for the electrode. Prepared Zn-Co3O4@CW-230 electrode (0.6 mm thick) displays ultrahigh area specific capacitances of 7.83 and 6.46 F cm−2at the current densities of 5 and 30 mA cm−2, respectively. Moreover, a symmetric supercapacitor assembled by two identical Zn-Co3O4@CW-230 electrodes delivers a superior area-specific capacitance of 2.61 F cm−2at the current densities of 5 mA cm−2and great energy densities of 0.36 mWh cm−2(6.0 mWh cm−3) at 2.5 mW cm−2, while maintaining 97.3% of initial capacitance over 10,000 cycles. It notably outperforms those of most carbon-based metal oxides, endowing the Zn-Co3O4@CW-230 with extensive prospects for practical application.Keywords:semi-embedding;transition metal oxides;hybrid ZIFs;wood-derived carbon;supercapacitors
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 29
·期 13
·e202203097
·
IF 5.02
Ruixia Yang,Qiaohong Peng,Adeel Ahmed,Fengyuan Gao,Bing Yu,Youqing Shen,Hailin Cong
Graphical MB and PMS are absorbed by the Fe 3 O 4 /C shell and subsequently diffuse into the interior cavity of the yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites. PMS enter the catalyst and interact with active sites on the shell and in the core. Co 2+ and Fe 2+ in the catalyst can activate PMS to generate SO 4 ⋅ − . Meanwhile, OH − /H 2 O will be oxidized by SO 4 ⋅ − to ⋅OH, generating H + while consuming OH − . SO 4 ⋅ − , ⋅OH and , resulting from a typical chain reaction, will interact with MB and breakdown it to intermediates CO 2 and H 2 O. The yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites with Co 3 O 4 as the core, Fe 3 O 4 /C as the shell, and a cavity structure were synthesized by the hard template method. The physical and chemical properties of the composites were characterized by SEM, TEM, XRD, TGA, XPS, BET, and VSM. The specific surface area of yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites is 175.9 m 2 g −1 , showing superparamagnetic properties. The yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites were used as heterogeneous Fenton catalysts to activate peroxymonosulfate (PMS) to degrade MB, which showed high catalytic degradation performance. The degradation rate of MB reached 100 % within 30 min under the circumstances of the yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites dosage of 0.1 g L −1 , the PMS dosage of 1.0 g L −1 , the initial MB concentration of 100 mg L −1 , an initial pH of 5.5, and a temperature of 30±2 °C. The enhanced catalytic performance of the yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites can be attributed to the synergistic effect of the two catalytically active materials and the middle cavity. The effects of different operating parameters and co-existing anion species on MB degradation were also investigated. Electron paramagnetic resonance (EPR) analysis and quenching experiments confirmed that the formation of SO 4 ⋅ − in the yolk-shell Co 3 O 4 @Fe 3 O 4 /C/PMS system contributes to MB degradation. In addition, yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites can be easily separated from the pollutant solution under the action of an external magnetic field, and the degradation rate of MB can still reach 98 % after five cycles, indicating that it has good stability and reusability and has broad application prospects in the field of water purification.
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高影响因子
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