Silica-Supported Titania–Zirconia Nanocomposites: Structural and Morphological Characteristics in Different Media

Sulym, Iryna; Goncharuk, E.V.; Sternik, Dariusz; Skwarek, Ewa; Deryło–Marczewska, Anna; Janusz, W.; Gun’ko, Vladimir M.

doi:10.1186/s11671-016-1304-1

Cited by 27 publications

(15 citation statements)

References 35 publications

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“…To control the morphology and other characteristics of nanoparticles, the synthesis of certain phases (deposits) could be carried out at a surface of nanocarriers with a high-specific surface area [13][14][15][16][17]. Fumed silica is one of the most widely used carriers with a large-specific surface area, high-thermal stability and chemical resistance [14].…”

Section: Introductionmentioning

confidence: 99%

“…The use of fumed silica as a carrier provides the simplicity of the modification methods with easy control of the dispersity of both a deposited phase and whole material as well the structure and surface properties. Some silica-supported nanocomposites with CeO, ZrO and TiO 2 were synthesized by sol-gel or chemical vapour depositions of these oxides on a surface of highly dispersed fumed silica [15][16][17]. Such nanosized oxide deposits as Mn x O y , Ni x O y and Zn x O y are promising for the synthesis of highly disperse oxides with improved surface properties, e.g., as catalysts [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Silica-supported $$\hbox {Ni}_{{x}}\hbox {O}_{{y}}$$, $$\hbox {Zn}_{{x}}\hbox {O}_{{y}}$$ and $$\hbox {Mn}_{{x}}\hbox {O}_{{y}}$$ nanocomposites: physicochemical characteristics and interactions with water and n-decane

et al. 2019

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A series of M x O y /SiO 2 (where M = Ni, Zn and Mn) nanocomposites were synthesized at different M x O y contents (0.2, 1 and 3 mmol per 1 g SiO 2) using a deposition method. The samples were characterized using nitrogen adsorption-desorption, X-ray diffraction, Fourier transform infrared spectroscopy, high resolution transmission electron microscopy and photon correlation spectroscopy. The heat of immersion in water (Q w) and n-decane (Q d) were measured using a microcalorimetry method, and the corresponding values of the hydrophilicity index K h = Q w /Q d were analysed. The formation of M x O y on a silica surface leads to diminishing of the Q w and Q d values (calculated per 1 g of nanocomposites) because of the specific surface area reduction. However, the Q w values calculated per 1 m 2 increase for Zn x O y /SiO 2 and Mn x O y /SiO 2 in comparison with the unmodified silica, and it remains unchanged for Ni x O y /SiO 2. Silica modification with M x O y significantly changes the pH dependence of zeta potential and affects the surface charge density. A shift of the isoelectric point (pH IEP) and a character of the zeta potential ζ (pH) curve are affected by the M x O y phase, and pH IEP shifts toward higher values as follows Mn < Zn < Ni. Keywords. Oxide nanocomposites; Zn x O y /SiO 2 ; Ni x O y /SiO 2 ; Mn x O y /SiO 2 ; physicochemical properties; heats of immersion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silica-supported $$\hbox {Ni}_{{x}}\hbox {O}_{{y}}$$, $$\hbox {Zn}_{{x}}\hbox {O}_{{y}}$$ and $$\hbox {Mn}_{{x}}\hbox {O}_{{y}}$$ nanocomposites: physicochemical characteristics and interactions with water and n-decane

et al. 2019

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“…%) and TiO 2 -ZrO 2 /SiO 2 (10 : 10 : 80 wt. %) were synthesized using a liquid-phase method and fumed silica A-300 as a substrate that results in the formation of ZrCeO x /SiO 2 and ZrTiO x /SiO 2 heated at 550 °C (XRD-amorphous phase, but HRTEM images show the presence of crystallites) and 1100 °C (including XRDcrystalline phase) [26][27][28]. Two natural materials: "black clay" (Carpathian region including crystalline quartz, CaCO 3 , smectite with amorphous carbon (coal) and other components) and kaolin clay (Azov region, mainly kaolinite and small admixtures with quartz and clays, e.g.…”

Section: Methodsmentioning

confidence: 99%

Particulate morphology of nanostructured materials

Gun’ko¹,

Oranska²,

Paientko³

et al. 2020

Him. Fiz. Tehnol. Poverhni

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The aim of this study was to develop a technique to analyze the crystalline and particulate morphology of highly disperse complex metal and metalloid oxides, which include both crystalline and amorphous phases, using X-ray diffraction (XRD) data to compute crystallite size distributions (CSD) compared to the particles size distribution functions estimated from high-resolution transmission electron microscopy (TEM) images treated with specific software. Two versions of the XRD treatment methods were used: (i) full profile analysis (FPA) of whole XRD patterns with a self-consistent regularization (SCR) procedure using models for spherical and lamellar crystallites that allows us to estimate relative contributions of crystallites of different shapes; and (ii) analysis of main pure XRD lines with consideration of corrections on an instrumental line profile and background using a regularization procedure with models of spherical or lamellar crystallites. The XRD and TEM based approaches were tested to analyze the crystalline and particulate morphology of various disperse materials: complex (binary and ternary) fumed oxides with silica/alumina, silica/titania, and alumina/silica/titania including crystalline alumina and titania and amorphous silica; nanocomposites CeO 2-ZrO 2 /SiO 2 (10 : 10 : 80 wt.%) and TiO 2-ZrO 2 /SiO 2 (10 : 10 : 80 wt.%) including crystalline and amorphous phases and synthesized using a liquid-phase method and fumed silica A-300 as a substrate; and natural clays of complex composition including several crystalline phases. Obtained results show that the developed approaches to analyze the XRD patterns could be effectively used to compute the CSD in parallel with TEM image treatments, using specific software, for a deeper insight into crystalline and particulate morphology of various disperse materials.

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“…5c, d) corresponding to the binding energy of 458.4 and 182 eV represent Ti 4+ and Zr 4+ ions, respectively [25]. Shifting of Ti 2p 3/2 towards lower energy region was observed for TZ85:15 coating compared to pure titania [28] coating due to the formation of Ti-O-Zr bond. Further, after deconvolution of O 1 s (Fig.…”

Section: Xps Analysismentioning

confidence: 96%

ZrO2 incorporated TiO2 based solar reflective nanocomposite coatings on glass to be used as energy saving building components

2019

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Single layer design ZrO 2 incorporated TiO 2 based transparent hard reflecting nanocomposite coatings on glass substrates were developed by sol-gel dip-coating technique using zirconium (IV) n-propoxide (ZP) and titanium (IV) isopropoxide (TTIP) followed by heat treatment at 500 °C for 1 h. The above nanocomposite based TiO 2-ZrO 2 coated glass could be used as component for efficient energy saving building materials with esthetic beauty. The TZ85:15 coated glasses (dimension: 200 × 200 mm 2) with coating thickness 90 ± 10 nm having refractive index value of 1.985 ± 0.002 were found to be flawless with good hardness ~ 5H and adhesion properties. GIXRD and Raman analysis of specimens revealed the crystalline nature of the heat-treated coatings, whereas the formation of Ti-O-Zr network was observed by XPS and FTIR. Coated glass showed > 28% of average reflection (within wavelength range of 350-2500 nm) and ~ 31% (within wavelength range of 400-800 nm). It also revealed the golden yellow reflected color under tube-light exhibiting enhanced aesthetic beauty making suitable candidate for heat reflecting component.

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Silica-Supported Titania–Zirconia Nanocomposites: Structural and Morphological Characteristics in Different Media

Cited by 27 publications

References 35 publications

Silica-supported $$\hbox {Ni}_{{x}}\hbox {O}_{{y}}$$, $$\hbox {Zn}_{{x}}\hbox {O}_{{y}}$$ and $$\hbox {Mn}_{{x}}\hbox {O}_{{y}}$$ nanocomposites: physicochemical characteristics and interactions with water and n-decane

Silica-supported $$\hbox {Ni}_{{x}}\hbox {O}_{{y}}$$, $$\hbox {Zn}_{{x}}\hbox {O}_{{y}}$$ and $$\hbox {Mn}_{{x}}\hbox {O}_{{y}}$$ nanocomposites: physicochemical characteristics and interactions with water and n-decane

Particulate morphology of nanostructured materials

ZrO2 incorporated TiO2 based solar reflective nanocomposite coatings on glass to be used as energy saving building components

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