Synthesis and characterization of Fe2O3/SiO2 nanocomposites

Богатырев, В. М.; Gun’ko, Vladimir M.; Galaburda, M.V.; Borysenko, M.V.; Pokrovskiy, V. A.; Oranska, O.I.; Polshin, Ernest V.; Korduban, A. M.; Лебода, Р.; Skubiszewska–Zięba, J.

doi:10.1016/j.jcis.2009.06.044

Cited by 39 publications

(11 citation statements)

References 28 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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“…This method has been used to synthesize nanoparticles of II-VI compounds (e.g., CdS, PbS), 10,11 III-V compounds (GaAs) 12 and a wide range of metal oxides including TiO 2 , 13 ZnO, 14 Fe 2 O 3 , 15 and PbO, 16 Fe 3 O 4 . The major templates used for the preparation of hybrid materials can be produced at present with monodispersed colloid particles or controlled morphology (such as membrane pore structure).…”

Section: Introductionmentioning

confidence: 99%

Raspberry-like morphology of polyvinyl chloride/zinc oxide nanoparticles induced by surface interaction and formation of nanoporous foam

et al. 2015

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This work presents a facile approach to synthesize P(VC-co-AAEM) (vinyl chloride copolymerized acetoacetoxyethyl methacrylate)/zinc oxide (ZnO) nanocomposite particles with raspberry-like shape by a nano-coating technique. It is proved that the interactions between the b-diketone groups embedded in AAEM and ZnO precursors are crucial to forming the raspberry-like morphology, as such, the content of AAEM has a significant effect on the nucleation and growth of ZnO nanocrystals on the P(VC-co-AAEM) beads. SEM analysis demonstrated that ZnO nanocrystals were deposited on the surface of template nanoparticles as small clusters with different sizes and quantity, depending on the reaction parameters. X-ray diffraction of the P(VC-co-AAEM)/ZnO nanocomposite particles revealed that the addition of functionalized PVC beads lowered the formation of ZnO nanocrystals due to the constraining effect of the ZnO-AAEM interaction on the mobility of ZnO precursors. Additionally, such PVC/ZnO composite particles were found to have excellent foamability of nanometer-sized pores, which could have various potential applications in sound insulation and thermal insulation. Scheme 1 Schematic representation of the steps involved in the fabrication of P(VC-co-AAEM)/ZnO composite particles and foaming: (a) preparing functionalized P(VC-co-AAEM) particles, (b) fabrication of P(VC-co-AAEM)/ZnO nanocomposite particles, (c) absorbing ADC, (d) foaming in mould. 36846 | RSC Adv., 2015, 5, 36845-36857 This journal is

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“…Composites with different oxide/silica ratios and forms have synthesized with various methods for diverse applications, including via a formamide modified sol-gel process [11], Fe 2 O 3 /SiO 2 hollow spheres [12], iron oxidesilica nanocomposite films by spin coating as humidity sensors [13], mesoporous iron oxide-silica aerogels as catalysts for oxidation of NH 3 and reduction of NO [14], Fe-Si mixed oxide nanocomposites that contain iron oxide as the major phase [15], nanocluster iron oxide-silica aerogel catalysts for methanol partial oxidation [16], Fe 2 O 3 -SiO 2 composites, nanosized c-Fe 2 O 3 particles and study on the influence of the iron salts concentration [17], iron oxide-silica nanocomposites with wet impregnation [18], magnetic susceptibility studies of Fe 2 O 3 -SiO 2 [19], Fe 2 O 3 /SiO 2 nanocomposites based on fumed silica (S BET = 265-337 m 2 /g) [20], study of the magnetic properties of the iron oxide particles hosted in silica aerogels pores [21], silica aerogel-iron oxide nanocomposites as catalysts in conjugate additions and in the Biginelli reaction [22]. In spite of these studies, to the best of our knowledge, there is no report on the oxidation of alcohols by silica-iron oxide nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Silica aerogel–iron oxide nanocomposites: recoverable catalysts for the oxidation of alcohols with hydrogen peroxide

Masoudian

Hosseini‐Monfared

Aghaei

2011

Transition Met Chem

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Synthesis and characterization of Fe2O3/SiO2 nanocomposites

Cited by 39 publications

References 28 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

Raspberry-like morphology of polyvinyl chloride/zinc oxide nanoparticles induced by surface interaction and formation of nanoporous foam

Silica aerogel–iron oxide nanocomposites: recoverable catalysts for the oxidation of alcohols with hydrogen peroxide

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