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We reported the morphology-directed synthesis of Co(3)O(4) nanotubes via interfacial reaction of NaOH with pre-fabricated CoC(2)O(4)·2H(2)O nanorods based on modified Kirkendall effect. The as-obtained Co(3)O(4) nanotubes showed excellent activity and durability in catalytic combustion of CH(4).
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http://dx.doi.org/10.1039/c1cc15976c | DOI Listing |
ACS Nano
August 2025
Key Laboratory of Material Physics of Ministry of Education, School of Physics, Zhengzhou University, Zhengzhou 450052, China.
Rechargeable aqueous Zn-ion batteries hold significant promise for wearable electronics due to their intrinsic safety and eco-friendliness, yet cobalt-based cathodes remain constrained by poor conductivity and sluggish kinetics. Addressing these limitations, we developed 3D-printed (3DP) hierarchically porous MOF-derived cathodes for aqueous zinc-cobalt (Zn-Co) batteries via three synergistic innovation technology pathways: (i) ZIF-67-derived nitrogen-doped carbon-coated CoO nanoparticles (CoO-NC NPs) were synthesized using a scalable hydrothermal method and subsequent annealing process; (ii) a dual-ion (Zn/Mn)-optimized hybrid electrolyte system, that is, the dual-ion synergy from Mn additive enhanced Zn desolvation kinetics while suppressing dendrite formation; and (iii) 3D printing hierarchically porous microlattice architecture integrating reduced graphene oxide/carbon nanotubes-based (rGO/CNTs-based) to establish bicontinuous ion/electron transport networks. The 3DP button Zn-Co cells (thickness: 0.
View Article and Find Full Text PDFRSC Adv
July 2025
Biosensors Research Lab, Zewail City of Science and Technology 6th October City Giza 12578 Egypt
Fast and accurate determination of toxic and explosives compounds are necessary. Thus, a portable-electrochemical sensing system was developed for the rapid and sensitive detection of 2,4,6-trinitrotoluene (TNT) using a screen-printed electrode (SPE) modified with a CoO/MnO@MWCNTs nanocomposite. This nanocomposite combines the electrocatalytic activity of the hybrid metal oxides (CoO and MnO) with the high conductivity and surface area of multi-walled carbon nanotubes (MWCNTs), resulting in enhanced sensor performance.
View Article and Find Full Text PDFInt J Biol Macromol
August 2025
School of Energy and Chemical Engineering, Xiamen University Malaysia, 43900 Sepang, Selangor Darul Ehsan, Malaysia; Centre of Excellence for Industrial Research and Climate Action (CIRCLE), Xiamen University Malaysia, Selangor Darul Ehsan, Malaysia; College of Chemistry and Chemical Engineering, Xi
Flexible supercapacitors are promising energy storage devices for wearable electronics; however, their practical application is limited by the low energy storage capacity of electrode materials. Nanocellulose, a naturally abundant and biodegradable material with high mechanical strength and low weight, offers potential as a sustainable platform for electrode design. In this study, flexible, free-standing electrode films were fabricated by vacuum filtration of cellulose nanofibers (CNF), carbon nanotubes (CNT), and cobalt oxide (CoO) at varying mass ratios.
View Article and Find Full Text PDFNanoscale Adv
August 2025
GreenCat Laboratory, Department of Chemical Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad 826004 India
The present study reports the synthesis of a series of nanocatalysts (NCs) comprising iron (Fe), cobalt (Co), and zinc (Zn) supported on γ-AlO nanopowder (Fe5-Co-Zn/γ-AlO) by tuning the metals stoichiometric ratio using a facile co-precipitation approach. The powder X-ray diffraction patterns and Raman spectra revealed that the freshly synthesized Fe5-Co-Zn/γ-AlO is composed of hexagonal FeO, cubic CoO, and hexagonal ZnO phases. The NCs exhibited efficient performance in CH decomposition, yielding turquoise hydrogen (H) and carbon nanotubes (CNTs) as solid carbon by-products.
View Article and Find Full Text PDFSci Rep
July 2025
School of Physics and Materials, Nanchang University, Nanchang, 330031, People's Republic of China.
Transition metal oxides (TMOs), especially spinel-type iron oxides, are widely used as electrode materials for supercapacitors due to their high specific capacitance. However, as a kind of pseudocapacitive electrode material, transition metal oxide undergoes volume changes during the charge-discharge process, leading to a decrease in its cycling stability. Carbon nanotubes (CNTs), as a common carbon-based material, exhibit excellent cycling stability.
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