JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 10.6
Yiran Hu,Chunmei Wang,Xiaomin Dou,Jun Liu
A Co 3 O 4 /g-C 3 N 4 p-n heterojunction photocatalyst was fabricated by coupling ZIF-67-derived 3D porous Co/Co 3 O 4 /CN (N-doped carbon) composites with crystalline g-C 3 N 4 nanosheets for activating peroxymonosulfate (PMS) towards tylosin (TYL) degradation. The catalyst was synthesized via a carbonization-oxidation strategy, which retained the dodecahedral framework of ZIF-67 and simultaneously formed intimate interfacial contact with g-C 3 N 4 , thereby facilitating efficient interfacial charge transfer. The constructed p-n heterojunction generated an internal electric field that promoted migration of photogenerated electrons and holes and suppressed charge recombination, thereby improving photocatalytic performance. Moreover, the localized surface plasmon resonance (LSPR) effect of metallic Co induced the generation of energetic hot electrons and hot holes under visible light, accelerating PMS activation and enhancing the Co(II)/Co(III) redox cycle. The synergistic interaction between photogenerated charge carriers and LSPR-induced hot carriers significantly promoted PMS activation, driving the generation of primary reactive oxygen species (·O 2 - and 1 O 2 ) and achieving 95.4% TYL degradation within 16 min. Toxicity and molecular docking analyses confirmed reduced antibacterial activity of degradation products. This study highlights the dual contributions of heterojunction-driven charge separation and LSPR-induced generation of hot carrier with subsequent interfacial transfer in achieving efficient, sustainable antibiotic degradation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Mengxin Liu,Pu Zhang,Boran Chen,Zhenyu Yang,Huinan Che,Yanhui Ao
Singlet oxygen ( 1 O 2 ) is promising for volatile organic compounds (VOC) removal in solar-driven interfacial evaporation (SDIE) systems, owing to its selectivity for electron-rich organic compounds and anti-interference capability. The radical precursor ·SO 5 − from peroxymonosulfate (PMS) is often strongly adsorbed and quenched on catalyst surfaces, impeding efficient 1 O 2 generation. To address this, we developed a bifunctional Co 3 O 4 /polyacrylamide hybrid hydrogel (Co 3 O 4 /PAMHH) evaporator, embedding Co 3 O 4 catalyst in a hydrophilic, hydrogen-bonding PAMHH network. This design precisely lowers the adsorption energy of ·SO 5 − on Co 3 O 4 surface to facilitate its desorption and enrichment within PAMHH pores, thereby establishing an optimal microenvironment for 1 O 2 formation. Scavenging experiments and ESR spectroscopy verified the directional production of 1 O 2 . With this design, Co 3 O 4 –0.2/PAMHH achieves stable phenol (PE) degradation across diverse pH and ionic conditions, achieving 90.4% PE removal in bulk water and 99.3% in condensed water with 2 mM PMS. Leveraging Co 3 O 4 's photothermal properties, an impressive evaporation rate of 3.40 kg m −2 h −1 was achieved under one sun irradiation. This work presents a novel microenvironment-regulated strategy that selectively directs PMS activation toward 1 O 2 , enabling simultaneous high-rate solar interfacial evaporation and efficient VOC removal. It establishes a new paradigm for precise control of reaction pathways in bifunctional solar-driven systems and offers a sustainable solution for integrated water purification and pollutant remediation.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Siyuan Li,Yang Yu,Haojie Duan,Dong Yue,Yu Feng
Bi-free ZnO-SrCO 3 -Cr 2 O 3 -Co 3 O 4 based varistor ceramics with the composition (97.4- x ) mol% ZnO-2 mol% SrCO 3 -0.1 mol% Cr 2 O 3 -0.5 mol% Co 3 O 4 - x mol% MnO 2 ( x = 0–0.7) were prepared by a conventional solid-state reaction method. The effects of MnO 2 on the microstructure, grain-boundary barriers and nonlinear electrical properties were systematically investigated. MnO 2 addition induced a non-monotonic change in ZnO grain size, altered the morphology and distribution of the Sr rich intergranular phases, and promoted the formation of crystalline Sr 2 Mn 2 O 5 at x ≥ 0.5 mol%. The sample with x = 0.5 mol% exhibited the best initial nonlinear electrical characteristics among the compositions investigated, with E 1 mA = 614 ± 18 V/mm, α = 33.2 ± 1.7, J L = 3.66 ± 0.37 μA/cm 2 , and ϕ b = 0.866 ± 0.022 eV. Further increasing the MnO 2 content increased the Sr 2 Mn 2 O 5 phase fraction and refined the ZnO grains but reduced the nonlinear coefficient, indicating that the electrical response depended on the combined effects of phase composition, Sr-rich intergranular morphology, grain size, and grain-boundary-related electrical characteristics rather than on the amount of Sr 2 Mn 2 O 5 alone. These results demonstrate that appropriate MnO 2 addition can effectively regulate the microstructure and grain boundary related electrical response of Sr-Cr-based varistor ceramics.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Aiying Song,Qianyu Zhou,Yuanxi Zhang,Shanye Wu,Lin Xie,Chao Cai,Heng Chen,Yian Wang,Yuanmin Zhu
(RuPdIrNiMn) x Co 3-x O 4 exhibits superior OER activity with a low overpotential and small Tafel slope, along with robust long-term stability. • STEM observations and calculations confirm that the doping single-atoms preferentially occupy Co octahedral sites. • Tunable Co 2+ /Co 3+ ratio induces oxygen vacancies and surface defects, revealing the intrinsic role of doping-engineered defects. Electrochemical water splitting represents a critical technology for clean energy conversion. The development of efficient, cost-effective electrocatalysts based on noble-metal-atom doping in non-noble metal oxides holds significant research potential. A series of Ru-, Pd-, Ir-, Ni-, and Mn-doped Co 3 O 4 nanosheet catalysts were synthesized from ZIF-67 via a cooperative doping-coordination strategy. This study presents a synergistic regulation strategy that integrates single-atom metal anchoring with non-stoichiometric, multi-element, high-entropy-like doping to precisely modulate active sites. Comprehensive structural characterizations confirm the successful incorporation of compositionally complex single-atom dopants which preferentially occupy octahedral Co sites in the spinel lattice. This dual-optimization regulatory mechanism significantly enhances the tunability of the Co 2+ /Co 3+ redox couple and improves interfacial charge-transfer efficiency. The resulting catalyst delivers outstanding alkaline OER performance, achieving an overpotential of 269 mV at 10 mA cm −2 and a Tafel slope of 59.1 mV dec −1 . DFT calculations also confirm the site-specific occupancy at the octahedral Co sites in the spinel framework. Thermodynamic analysis of the reaction barriers validates the dominance of the AEM pathway during the OER. The synergistic effect of multi-metal doping triggers local charge redistribution, which serves as the fundamental mechanism for reducing the reaction overpotentials. The development of efficient, cost-effective electrocatalysts based on noble-metal-atom doping in non-noble metal oxides holds significant research potential. A series of Ru-, Pd-, Ir-, Ni-, and Mn-doped Co 3 O 4 nanosheet catalysts were synthesized from ZIF-67 via a cooperative doping-coordination strategy. This study presents a synergistic regulation strategy that integrates single-atom noble metal anchoring with non-stoichiometric, multi-element, high-entropy-like doping to precisely modulate active sites and the local electronic structure. Comprehensive structural characterizations confirm the successful incorporation of compositionally complex single-atom dopants which preferentially occupy octahedral Co sites in the spinel lattice. This dual-optimization regulatory mechanism significantly enhances the tunability of the Co 2+ /Co 3+ redox couple and improves interfacial charge-transfer efficiency. The resulting catalyst delivers outstanding alkaline OER performance, achieving an overpotential of 269 mV at 10 mA cm −2 and a Tafel slope of 59.1 mV dec −1 . Theoretical calculations confirm the site-specific occupancy at the octahedral Co sites of the spinel framework. The synergistic effect of multi-metal doping triggers local charge redistribution, which serves as the fundamental mechanism for reducing the reaction overpotentials. Download: Download high-res image (122KB) Download: Download full-size image
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
·Vol. 49
·期 43
·19050-19061
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IF 2.5
Yuan Liu,Ming Li,Qingqing Song,Yuancheng Hou,Yingjia Wang
Co3O4, with a high theoretical capacitance, is a promising electrode material for energy storage devices. However, the poor conductivity, low reaction activity and sluggish reaction kinetics of Co3O4 constrain its performance. Herein, light irradiation is employed to improve the electrochemical performance of Co3O4 as a cathode material in zinc ion hybrid capacitors (ZIHCs). To strengthen the favorable effect of light irradiation, Cu2O is coupled with Co3O4 to construct a heterojunction, which enhances the separation and transfer of photo-induced charge carriers, thereby improving the conductivity, reactivity and reaction kinetics of materials. Two different heterojunction structures are constructed, and their photoelectric properties and photo-assisted charging performance are investigated. The optimal Co3O4/Cu2O electrode (OC2) shows a specific capacitance of 793.0 F g−1 at a current density of 4 A g−1 under illumination, which is 77.2% higher than that in the dark and is 3.7 and 10.2 times the capacitance of pristine Co3O4 and Cu2O, respectively. The mechanism analysis provides theoretical support for the photo-enhanced electrochemical performance of OC electrodes. The constructed OC2//Zn capacitor exhibits a high energy density of 255.3 Wh kg−1 and an excellent power density of 15.9 kW kg−1 under illumination. The device also demonstrates long-term stability with a capacity retention of 93.6% after 1000 cycles.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 48
·期 5
·6549-6555
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IF 4.527
Deshuang Hu,Ruyue Wang,Peng Du,Gang Li,Yonggang Wang,Dongyu Fan,Xuchao Pan
Enhancing the catalytic activity for oxygen evolution and oxygen reduction reactions is critical for rechargeable metal-air batteries. Herein, coral-like Ru-doped cobalt oxide nanofibers are prepared by electrospinning and subsequent heat treatment, which reduce the charge transfer resistance of cobalt oxide and optimize its active sites. Moreover, the large specific surface area and rich porosity of the one-dimensional nanomaterials prepared by the electrospinning method markedly improved the catalytic activity. Under the same catalyst load, Ru-doped cobalt oxide nanofibers have an overpotential of 300 mV, which is smaller than that of ruthenium oxide. In the oxygen reduction reaction, the positive half-wave potential of Ru-doped cobalt oxide nanofibers and Pt/C is the same (0.81 V). This work combines the strategies of doping and the advantages of electrospinning nanofibers to make a breakthrough in the catalytic activity of doped cobalt oxide nanofibers, and provides a new basis for the design of one-dimensional nanofiber bifunctional catalysts.
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高影响因子
ACS Applied Energy Materials
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2019
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IF 0
Chengxing Li,Daobin Liu,Yukun Xiao,Zixuan Liu,Li Song,Zhipan Zhang
Lithium–air batteries (LABs) are considered as one of the most promising next-generation energy storage devices due to their high theoretic specific energy. However, the commercialization of current LABs is considerably limited by the high overpotential in charging/discharging, low energy efficiency, and poor cyclability. To solve these problems, mesoporous Co3O4-rods-entangled carbonized polyaniline nanotubes (Co3O4-e-cPANI) have been facilely prepared through a facile hydrothermal method, and their unique hierarchical architectures fully exploit synergistic effects from the catalytically active Co3O4 and the conductive cPANI, simultaneously facilitating the rapid oxygen diffusion and electrolyte penetration as well as unimpeded electron transportation. As a result, the LAB with the Co3O4-e-cPANI cathode shows an excellent cycling stability of 430 cycles under a reversible capacity of 500 mAh g–1 and 226 cycles under a higher capacity of 1000 mAh g–1. The current results demonstrate that optimizing the air cathode structure such as constructing Co3O4-e-cPANI architecture is an important route to further improve the stability of LABs toward practical applications.
研究领域:
储能
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材料科学
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电化学
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纳米材料
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ENVIRONMENTAL RESEARCH
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2026
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IF 8.2
Shihan Wang,Weike Zheng,Haifeng Shi,Yigang Chen
In peroxymonosulfate (PMS) activation processes, the relatively slow redox kinetics of metal ions have been a key factor limiting both PMS activation efficiency and photocatalytic performance. In this study, a Co 3 O 4 /PTFE composite with integrated piezoelectric and photothermal properties was successfully constructed, which significantly enhanced the Co 3+ /Co 2+ cycle and thereby promoted PMS activation for efficient tetracycline (TC) degradation. Under the dual stimulation of mechanical agitation and visible light irradiation, the Co 3 O 4 /PTFE composite exhibited enhanced photothermal conversion and piezoelectric performance, which significantly promoted the generation of reactive species such as SO 4 •- and •OH. Compared with pristine Co 3 O 4 , CoP-2 demonstrated a superior TC degradation efficiency of up to 83% in the PMS system. X-ray photoelectron spectroscopy (XPS) analysis revealed that the introduction of polytetrafluoroethylene (PTFE) induced interfacial strain, modulated the valence state of cobalt species, and optimized the surface electronic structure, thereby facilitating the formation of active sites and enhancing electron transfer processes. Free radical trapping experiments further identified the dominant reactive species and revealed the underlying synergistic catalytic mechanism. Moreover, CoP-2 maintained excellent stability after multiple degradation cycles. This study provides a novel strategy for the design of multifunctional synergistic catalysts and expands the application potential of piezo-photothermal/PMS systems in environmental purification.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
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IF 6.7
Mutian Zhang,Ziying Ji,Xing Wang,Yulin Ouyang,Zening Yang,Siyuan Zhou,Miao Zeng,Wei Zheng,Jiajia Wang,Guobing Ying
Understanding the catalytic mechanisms of the alkaline hydrogen evolution reaction (HER) is essential for the rational design of efficient catalysts. In this work, Fe/Ni-doped Co 3 O 4 systems were investigated by combining DFT+U calculations with experimental validation. Theoretical simulations reveal that both dopants induce spin-state transitions in Co 3+ , tune orbital hybridization, and redistribute reaction energy barriers across elementary steps rather than uniformly lowering them on the Co 3 O 4 (110) surface. Hydrothermally synthesized Fe-Co 3 O 4 and Ni-Co 3 O 4 microflower spheres confirm these predictions: Ni doping lowers the overall reaction barrier by optimizing the electronic structure and adsorption energetics associated with high-spin Co 3+ , leading to a reduced onset overpotential, whereas Fe doping facilitates water dissociation via enhanced spin polarization, thereby lowering the rate-determining barrier and improving kinetics at high current densities. Further analyses identify reliable descriptors for different catalytic advantages: the overall reaction barrier, d -band center, and covalent bonding degree of water adsorption serve as indicators of thermodynamically favorable catalysts with low overpotential, whereas the rate-determining step barrier and d-p coupling are key descriptors of kinetically favorable catalysts with enhanced current-density performance. This study clarifies the step-specific roles of spin-state modulation and provides a framework for catalyst design based on energy barrier redistribution.
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高影响因子
LANGMUIR
·
2026
·
IF 4.4
Xinru Nie,Qinghai Cai,Yajing Wang
Designing advanced cobalt-based catalysts capable of selectively generating singlet oxygen (1O2) is crucial for suppressing interference from coexisting reactive oxygen species in peroxymonosulfate (PMS) activation and achieving efficient degradation of organic pollutants. In this work, an interface engineering strategy was employed to fabricate Co-CoO-Co3O4/CN featuring abundant oxygen vacancies and Co active sites. The constructed Co-CoO-Co3O4/CN + PMS system achieves nearly complete degradation of 50 mg·L–1 RhB within 20 min, and its catalytic activity outperforms most reported cobalt-based catalysts, with a specific rate constant value as high as 11.23 L2·min–1·g–2. In addition, the Co-CoO-Co3O4/CN + PMS system exhibits excellent broad-spectrum applicability, outstanding environmental tolerance, and stability. It enables continuous treatment of 49.8 L of RhB solution, with the degradation efficiency consistently maintained above 99%. Systematic investigations demonstrate that Co-CoO-Co3O4/CN exhibits a strong interaction with PMS, and this enhanced interaction can drive the efficient conversion of PMS into superoxide anion radicals (O2•–), which are further transformed into 1O2. This work provides new insights into the rational design of high-performance cobalt-based catalysts, and paves the way for efficient PMS activation and selective 1O2 generation.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2026
·
IF 2.8
Li Wenting,Wang Xinting,Liu Sanmei
Co 3 O 4 is a promising electro-oxidation catalyst, which is applicable to the oxygen evolution reaction (OER) and glucose oxidation reaction (GOR). However, its insufficient active sites and poor conductivity severely restrict its practical application. Herein, a Co 3 O 4 /CN electrocatalyst derived from zeolitic imidazolate framework (ZIF)-67/CN was successfully synthesized via a solvent-free strategy for efficient OER and GOR. In electrocatalytic OER, Co 3 O 4 /CN demonstrated superior performance on a glassy carbon (GC) electrode, achieving an overpotential ( η ) of 306 mV at a current density ( j ) of 10 mA cm −2 , which outperformed Co 3 O 4 -ZIF (Co 3 O 4 /CN derived from ZIF-67). Furthermore, the Co 3 O 4 /CN electrocatalyst also exhibited good GOR ability, with high sensitivity of 1021.9 μA mM −1 cm −2 , a low detection limit of 1.8 μM ( S / N = 3), a broad linear range from 2 μM to 2.1 mM, excellent repeatability and reproducibility (relative standard deviation [RSD] < 6%), and long-term stability up to 3 weeks. The enhanced activity may be ascribed to the rich active sites, porous structure, and improved electrical conductivity of Co 3 O 4 /CN. This work provides a feasible strategy for enhancing electrocatalytic activity toward OER and GOR using metal–organic framework (MOF)/CN-based materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Zhenlong Liu,Yu Liu,Jiayuan Zhang,Ruiyan Zheng,Fangfang Xing,Zunyuan Xie,Guofang Zhang
Nano-sized Co 3 O 4 was stepwise confined into N-doped hollow carbon nanospheres. • Yolk-shell Co 3 O 4 @NHCs exhibits the best catalytic activity for AP pyrolysis. • In situ formed Co 3 O 4 -graphene composite accelerates the deep oxidation of ammonia. • A possible catalytic mechanism for AP combustion was systematically proposed. Transition metal oxides are widely used to catalyze the decomposition of ammonium perchlorate (AP) because of their reversible multivalent redox behavior. However, their catalytic performance is often constrained by particle aggregation and insufficient exposure of active sites. We encapsulate the precursors within nitrogen-rich hollow carbon nanospheres (NHCs) to synthesize core–shell MCo 2 O 4 @NHCs (M = Fe, Co, Ni, Cu, Zn, V, Cr, Mn) composites via our previously reported stepwise confined strategy. Among these, 5 wt% Co 3 O 4 @NHCs + AP exhibits the best catalytic activity, lowering the high-temperature decomposition peak of AP by 151 °C and increasing heat release by 2.13 times compared to pure AP. Kinetic analysis shows that Co 3 O 4 @NHCs significantly reduces the activation energy under the A2 model. Electrochemical tests confirm its superior electron-transfer capability, which facilitates AP decomposition. TG-FTIR-MS/GC reveals that Co 3 O 4 @NHCs accelerates NH 3 oxidation. DFT calculations indicate that the Co 3 O 4 @NHCs surface exhibits the strongest adsorption for both NH 3 and O 2 , promoting NH 3 oxidation by surface active oxygen species to generate NO x . Based on these results, a rational catalytic pathway for AP decomposition is proposed. This work validates the “spatial confinement + interface regulation” strategy and offers new insights into the design of efficient burning rate catalysts. Download: Download high-res image (173KB) Download: Download full-size image
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