Structure changes in the sol–gel systems of hydrated oxides

Sols of hydrated aluminium oxide, hydrated zirconium oxide and their mixtures were investigated during the xerogel–amorphous-product–crystalline-product transition by SAXS using synchrotron radiation. In the different temperature regions certain changes in structure and morphology were observed. Some correlation between the characteristics of the initial sols and their mixtures (the size and shape of the pores) was observed. In the temperature region 298–1173 K the characteristics of the mixed sol are defined by the characteristics of the initial sols.

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Li0.95Na0.05Ti2(PO4)3/C with Good Performance as Anode Material for Aqueous Rechargeable Lithium Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.989-994.316 ◽

2014 ◽

Vol 989-994 ◽

pp. 316-319 ◽

Cited By ~ 2

Author(s):

Jing Zhu ◽

Yong Guang Liu ◽

Qing Qing Tian ◽

Ling Wang ◽

Ji Lin Cao

Keyword(s):

Cyclic Voltammetry ◽

Electrochemical Performance ◽

Anode Material ◽

Lithium Batteries ◽

Sol Gel ◽

Nasicon Structure ◽

Galvanostatic Charge ◽

Rechargeable Lithium Batteries ◽

Structure And Morphology ◽

Charge Discharge

Li0.95Na0.05Ti2(PO4)3/C nanocomposite was prepared by sol-gel method.The structure and morphology of the samples were characterized by XRD, SEM which showed the particles had typical NASICON structure and diameter range from 400~500nm. The electrochemical performance were tested by cyclic voltammetry and galvanostatic charge–discharge. Results show Li0.95Na0.05Ti2(PO4)3/C nanocomposite exhibitsmuch better electrochemical performance than bare Li0.95Na0.05Ti2(PO4)3.

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As(III) and As(V) adsorption on nanocomposite of hydrated zirconium oxide coated carbon nanotubes

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2017.10.004 ◽

2018 ◽

Vol 511 ◽

pp. 277-284 ◽

Cited By ~ 28

Author(s):

Dengchao Liu ◽

Shubo Deng ◽

Ayiguli Maimaiti ◽

Bin Wang ◽

Jun Huang ◽

...

Keyword(s):

Carbon Nanotubes ◽

Zirconium Oxide ◽

Hydrated Zirconium ◽

Coated Carbon

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Microstructure Evolution of Ag/TiO2 Thin Film

Magnetochemistry ◽

10.3390/magnetochemistry7010014 ◽

2021 ◽

Vol 7 (1) ◽

pp. 14

Author(s):

Dewi Suriyani Che Halin ◽

Kamrosni Abdul Razak ◽

Mohd Arif Anuar Mohd Salleh ◽

Mohd Izrul Izwan Ramli ◽

Mohd Mustafa Al Bakri Abdullah ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Growth Rate ◽

Synchrotron Radiation ◽

Tio2 Thin Film ◽

Sol Gel ◽

Tio2 Thin Films ◽

Contact Mode ◽

X Ray ◽

Radiation Imaging

Ag/TiO2 thin films were prepared using the sol-gel spin coating method. The microstructural growth behaviors of the prepared Ag/TiO2 thin films were elucidated using real-time synchrotron radiation imaging, its structure was determined using grazing incidence X-ray diffraction (GIXRD), its morphology was imaged using the field emission scanning electron microscopy (FESEM), and its surface topography was examined using the atomic force microscope (AFM) in contact mode. The cubical shape was detected and identified as Ag, while the anatase, TiO2 thin film resembled a porous ring-like structure. It was found that each ring that coalesced and formed channels occurred at a low annealing temperature of 280 °C. The energy dispersive X-ray (EDX) result revealed a small amount of Ag presence in the Ag/TiO2 thin films. From the in-situ synchrotron radiation imaging, it was observed that as the annealing time increased, the growth of Ag/TiO2 also increased in terms of area and the number of junctions. The growth rate of Ag/TiO2 at 600 s was 47.26 µm2/s, and after 1200 s it decreased to 11.50 µm2/s and 11.55 µm2/s at 1800 s. Prolonged annealing will further decrease the growth rate to 5.94 µm2/s, 4.12 µm2/s and 4.86 µm2/s at 2400 s, 3000 s and 3600 s, respectively.

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ZIRCONIA FIBERS AS A COMPONENT OF HIGH TEMPERATURE THERMAL INSULATION (review)

Proceedings of VIAM ◽

10.18577/2307-6046-2021-0-10-79-86 ◽

2021 ◽

pp. 79-86

Author(s):

V.G. Babashov ◽

◽

N.M. Varrik ◽

Keyword(s):

High Temperature ◽

Thermal Insulation ◽

Zirconium Oxide ◽

Thermal Protection ◽

Sol Gel ◽

Precursor Solution ◽

Technical Literature ◽

Thermal Protection Systems ◽

Insulation Materials ◽

Protection Systems

Based on the analysis of recent publications of scientific and technical literature, data on the production of zirconium oxide fibers used for the manufacture of high-temperature thermal insulation materials are presented. Information is provided on various methods of obtaining zirconium oxide fibers (methods of impregnation of the template and molding of the mixture, sol-gel method of spinning a fiber-forming precursor solution), as well as on the technique of fiber molding (manual pulling, dry and wet spinning, blowing and electrospinning). The use of such fibers for the production of thermal insulation materials (felts, cords and blocks) instead of currently existing materials made of aluminum oxide-based fibers can significantly increase the operating temperatures of the thermal protection systems.

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Enhanced Magnetic Properties of BiFeO3 Thin Films by Doping: Analysis of Structure and Morphology

Nanomaterials ◽

10.3390/nano8090711 ◽

2018 ◽

Vol 8 (9) ◽

pp. 711 ◽

Cited By ~ 32

Author(s):

Yilin Zhang ◽

Yuhan Wang ◽

Ji Qi ◽

Yu Tian ◽

Mingjie Sun ◽

...

Keyword(s):

Thin Films ◽

Magnetic Properties ◽

Sol Gel ◽

Exchange Interactions ◽

Ferromagnetic Behavior ◽

Ferromagnetic Properties ◽

Structure And Morphology ◽

Related Diversification ◽

Lattice Distortions ◽

Mn Doped

The improvement of ferromagnetic properties is critical for the practical application of multiferroic materials, to be exact, BiFeO3 (BFO). Herein, we have investigated the evolution in the structure and morphology of Ho or/and Mn-doped thin films and the related diversification in ferromagnetic behavior. BFO, Bi0.95Ho0.05FeO3 (BHFO), BiFe0.95Mn0.05O3 (BFMO) and Bi0.95Ho0.05Fe0.95Mn0.05O3 (BHFMO) thin films are synthesized via the conventional sol-gel method. Density, size and phase structure are crucial to optimize the ferromagnetic properties. Specifically, under the applied magnetic field of 10 kOe, BHFO and BFMO thin films can produce obvious magnetic properties during magnetization and, additionally, doping with Ho and Mn (BHFMO) can achieve better magnetic properties. This enhancement is attributed to the lattice distortions caused by the ionic sizes difference between the doping agent and the host, the generation of the new exchange interactions and the inhibition of the antiferromagnetic spiral modulated spin structure. This study provides key insights of understanding the tunable ferromagnetic properties of co-doped BFO.

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Mo-doped BiVO4 thin films – high photoelectrochemical water splitting performance achieved by a tailored structure and morphology

Sustainable Energy & Fuels ◽

10.1039/c7se00301c ◽

2017 ◽

Vol 1 (8) ◽

pp. 1830-1846 ◽

Cited By ~ 32

Author(s):

Martin Rohloff ◽

Björn Anke ◽

Siyuan Zhang ◽

Ulrich Gernert ◽

Christina Scheu ◽

...

Keyword(s):

Thin Films ◽

Water Splitting ◽

Sol Gel ◽

Surface Recombination ◽

Photoelectrochemical Water Splitting ◽

Transfer Efficiency ◽

Hole Transfer ◽

Structure And Morphology ◽

Sol Gel Synthesis ◽

Reduced Surface

Facile sol–gel synthesis of Mo:BiVO4 thin films with optimized morphology results in reduced surface recombination and enhanced hole transfer efficiency.

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