Journal ArticleDOI
Highly photo-catalytically active hierarchical 3D porous/urchin nanostructured Co3O4 coating synthesized by Pulsed Laser Deposition
Raju Edla,Nainesh Patel,Nainesh Patel,Michele Orlandi,Nicola Bazzanella,Valentina Bello,Chiara Maurizio,Giovanni Mattei,Paolo Mazzoldi,Antonio Miotello +9 more
TLDR
In this paper, a porous coating assembled with hierarchical 3D Co3O4 urchin-like particles was synthesized by Pulsed Laser Deposition (PLD) and thermal oxidation.Abstract:
A porous coating assembled with hierarchical 3D Co3O4 urchin-like particles was synthesized by Pulsed Laser Deposition (PLD) and thermal oxidation. Laser ablation of Co B powder, used as the target material, in oxygen atmosphere formed core–shell particles on the coating surface with mainly a metallic Co core and a mixture of Co, B and O accommodating the shell. The thermal oxidation of these core–shell particles in air at 600 °C induces the morphological transformation to urchin-like particles consisting of nanowires (NWs) (diameter: 30–60 nm and length 1–3 μm) grown radially from the core surface. The extrusion marks on the surface of NWs indicate that the stress induced growth process is caused by difference in the thermal expansion coefficient. XRD, Raman, EXAFS and HRTEM analysis confirmed that the NWs are polycrystalline consisting of pure Co3O4 phase. A wet-chemistry hydrothermal procedure was also employed to synthesize nanostructured urchin-like particles which are hollow and the structure is held together by the radially oriented nanorods (diameter: 40–150 nm). During photocatalysis, urchin-like particles synthesized by PLD displayed significantly higher (∼5 times) degradation rates when compared to chemical urchins for degradation of methylene blue dye via a photo-Fenton reaction in presence of H2O2 and visible light. This is mainly attributed to poor stability of the nanorods in the chemical urchin structure. Features such as high surface area, enhanced stability against agglomeration, polycrystalline nature of the NWs, porous surface and superior adhesion, are responsible for the enhanced photocatalytic activity of Co3O4 urchin-like particles assembled in a porous coating synthesized by PLD and thermal oxidation. Reusability tests also demonstrate the robust nature of the catalyst coating.read more
Citations
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Journal ArticleDOI
Rational design on 3D hierarchical bismuth oxyiodides via in situ self-template phase transformation and phase-junction construction for optimizing photocatalysis against diverse contaminants
TL;DR: In this article, a series of 3D hierarchical bismuth oxyiodides via in situ phase transformation and phase-junction construction utilizing BiOI microspheres as self-sacrificed template through a facile calcination strategy were obtained at different temperatures.
Journal ArticleDOI
Polyaniline/Carbon Nitride Nanosheets Composite Hydrogel: A Separation-Free and High-Efficient Photocatalyst with 3D Hierarchical Structure.
TL;DR: A new idea of the construction of 3D hierarchical photocatalysts is presented, which can be applied in the sustainability field and is highly excellent in removing organic pollutant for PANI/CNNS composite hydrogel.
Journal ArticleDOI
Enhancement of catalytic activity and oxidative ability for graphitic carbon nitride
TL;DR: In this paper, a review summarizes the recent progress of graphitic carbon nitride (g-C 3 N 4 ) based materials regarding the catalytic activity improvement and oxidative ability enhancement.
Journal ArticleDOI
A facile mechanochemical preparation of Co3O4@g-C3N4 for application in supercapacitors and degradation of pollutants in water.
TL;DR: The Co3O4@g-C3N4 hybrid catalyst exhibited excellent reusability and stability and appears to be a highly efficient, cost-effective, eco-friendly, and reusable catalyst; the g-C 3N4 present with the Co3 O4 acted as a conductive nano-network, leading to a higher capacitive and photocatalytic performance.
Journal ArticleDOI
Co3O4 nanorod-supported Pt with enhanced performance for catalytic HCHO oxidation at room temperature
TL;DR: In this paper, the Pt/Co3O4 catalyst exhibited a superior catalytic performance for HCHO oxidation at room temperature compared to Pt supported on commercial Co 3O4 (Pt/Co 3 o4-c) and Pt supported over commercial TiO2 (Pit/TiO2), which is mainly due to its distinct nanorod morphology, strong metal-support interaction between Pt and Co 3 o 4, and the intrinsic redox nature of the Co3 o4 support.
References
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Journal ArticleDOI
Correction: Corrigendum: Fetal Radiofrequency Radiation Exposure From 800-1900 Mhz-Rated Cellular Telephones Affects Neurodevelopment and Behavior in Mice
TL;DR: It is demonstrated that in-utero radiofrequency exposure from cellular telephones does affect adult behavior and the first experimental evidence of neuropathology due to in-UTero cellular telephone radiation is presented.