Synthesis and optical limiting effects in ZrO2 and ZrO2@SiO2 core–shell nanostructures

Rahulan, K. Mani; Vinitha, G.; Stephen, L. Devaraj; Kanakam, Charles Christopher

doi:10.1016/j.ceramint.2012.12.029

Cited by 32 publications

(14 citation statements)

References 9 publications

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“…As shown, the pure Fe3O4 has excellent thermal stability, which indicated by no decrease in mass during the heating process. Unlike Fe3O4, the pure ZrO2 and 0.5Fe3O4/ZrO2 show weight loss due to evaporation of water molecules at a temperature below 100 °C and the weight loss over 100 °C is related to removal of structurally bound water [14]. Figure 3a shows that all prepared samples could degrade under UV light, ultrasound irradiation or by both irradiations, which catalytic activity follows the order: sonophotocatalytic > sonocatalytic > photocatalytic.…”

Section: Resultsmentioning

confidence: 99%

Photo-, sono- and sonophotocatalytic degradation of methylene blue using Fe3O4/ZrO2 composites catalysts

Kristianto¹,

Taufik²,

Saleh³

2017

AIP Conference Proceedings

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Section: Resultsmentioning

confidence: 99%

Photo-, sono- and sonophotocatalytic degradation of methylene blue using Fe3O4/ZrO2 composites catalysts

Kristianto¹,

Taufik²,

Saleh³

2017

AIP Conference Proceedings

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“…Finally for SiO 2 coated ZrO 2 /ZnO, the peaks at 1,000-1,250 cm -1 corresponds to the asymmetric vibration of Si-O-Si. The band at around 968 cm -1 is assigned to the stretching vibration modes of Zr-O-Si group [24]. Also, after SiO 2 has been coated, the Zn-O bond has been suppressed completely thus describes that the dense SiO 2 layer was covered on the surface of ZrO 2 /ZnO core-shell nanoparticles.…”

Section: Ft-ir Spectramentioning

confidence: 97%

“…The formation of metal oxides as well as silica coating layers on ZrO 2 is important in a broader range of applications [22,23]. The uniformly coated shell provides enhancement to the core along with passivation and extra functionalities [24]. In this study we have chosen ZnO as the first shell particularly since it is a popular wide band gap semiconductor and has several favorable properties: good transparency, high electron mobility, wide band gap, strong room-temperature luminescence and magnetic properties etc.…”

Section: Introductionmentioning

confidence: 99%

Interfacial effect: magnetism in pure ZrO2, ZnO and SiO2 coated core/shell/shell hybrid nanoparticles

Selvi

Lee

Dinakaran

2014

J Mater Sci: Mater Electron

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We report the room temperature magnetic behavior of pure and dual shells ZnO as well as SiO 2 coated ZrO 2 core-shell nanoparticles. All the samples, viz., ZrO 2 , ZrO 2 /ZnO and ZrO 2 /ZnO/SiO 2 nanocrystallites have been successfully synthesized by chemical precipitation method. The XRD studies confirm the tetragonal structure for pure Zirconia and hexagonal wurtzite structure for ZnO coated ZrO 2 samples. Average size of nanocrystallites has been observed to increase due to the incorporation of the shells over ZrO 2 . Studies of SEM, TEM and EDAX were used to determine the morphology, size and presence of elements in the ZrO 2 nanocrystallites. The existence of SiO 2 on ZrO 2 @ZnO was characterized by FT-IR measurement. The VSM studies have shown that the dual shells ZnO as well as SiO 2 coated ZrO 2 samples exhibit S-shaped paramagnetic behavior of the samples with little variations. The paramagnetic ordering of this core-shell nanostructure was mainly attributed to oxygen vacancies and also to the minor impurity phases in Zirconia and ZnO lattices.

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“…It carries certain advantages to environmental applications for example enhancing high oxidation power and long durability against photo-and chemical corrosion (Lin et al 2010). Zirconia (ZrO 2 ) nanoparticles are interesting due to their enhanced optical and electrical properties (Manirahulan et al 2013). ZrO 2 is an n-type semiconductor having similar physicochemical properties with that of TiO 2 (Vishwanathan et al 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Manirahulan et al(2013) synthesized shell type ZrO 2 @SiO 2 nanoparticles through the combination of chemical precipitation and seeded polymerization. Lucky et al (2010) synthesized ZrO 2 /TiO 2 nanoparticles and studied their solvent effects on the crystal growth.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of TiO2 and ZrO2/TiO2 Composite Microspheres and Their Photo‐Catalytic Degradation of Methylene Blue

Vai̇zoğullar¹,

Balcı²,

Uğurlu³

et al. 2016

AKU-J. Sci. Eng.

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KeywordsSemiconductors, Sol-Gel Chemistry, X-ray Diffraction, Transmission Electron Microscopy (TEM), Catalytic Properties TiO 2 and ZrO 2 /TiO 2 composite microsphere particles were synthesized using the sol-gel method. Photoactivity of TiO 2 and ZrO 2 /TiO 2 were compared. Particles were characterized using X-ray diffraction (XRD), infrared spectroscopy (FTIR), scanning electron microscopy (SEM) of X-ray (EDAX), and transmission electron microscopy (TEM). The study revealed that TiO 2 particles were microspheres. The decorating of ZrO 2 particles on TiO 2 surface was successfully carried out that was proved by SEM and TEM analyzes. The photo-catalytic activity of TiO 2 and ZrO 2 /TiO 2 composite microsphere particles was examined using methylene blue (MB) as reference material under UV lamp. Our findings showed that ZrO 2 /TiO 2 was more active than TiO 2 . These findings suggest a new TiO 2 -based catalyst structure to synthesize and to emphasize the importance of the shape of the catalyst.

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Synthesis and optical limiting effects in ZrO2 and ZrO2@SiO2 core–shell nanostructures

Cited by 32 publications

References 9 publications

Photo-, sono- and sonophotocatalytic degradation of methylene blue using Fe3O4/ZrO2 composites catalysts

Photo-, sono- and sonophotocatalytic degradation of methylene blue using Fe3O4/ZrO2 composites catalysts

Interfacial effect: magnetism in pure ZrO2, ZnO and SiO2 coated core/shell/shell hybrid nanoparticles

Synthesis of TiO2 and ZrO2/TiO2 Composite Microspheres and Their Photo‐Catalytic Degradation of Methylene Blue

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