Photoluminescence quenching of Zirconia nanoparticle by surface modification

Sidhu, Gaganpreet; Kaushik, Ajeet; Rana, Shilpa; Bhansali, Shekhar; Kumar, Rajesh

doi:10.1016/j.apsusc.2014.10.036

Cited by 55 publications

(16 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ZrO 2 tetragonal-phase peaks are at 2Θ = 31.63, 50.31, 54.25. The NiO phase peak is at 2Θ = 44, and this interpretation agrees with the results of results of Sidh et al [18]. As previously mentioned (cf.…”

Section: Xrd Analysissupporting

confidence: 93%

Influence of Spark plasma sintering on the tetragonal phase of ZrO ₂ ‐NiO nanosized powders synthesised via oxidation of quenched melted Ni ₄₀ ‐Zr ₆₀ alloy

Messaoudene

Saïdi

Boutarek-Zaourar

et al. 2018

Micro & Nano Letters

View full text Add to dashboard Cite

Composite ZrO 2-NiO powders synthesised, via the oxidation of Ni 40-Zr 60 alloy, and ball milled to sizes below 90 nm were spark plasma sintered. The isotherm levels, above the monoclinic-tetragonal (m-t) transition temperature in ZrO 2 (1170°C), were in the range 1200 and 1300°C. Microstructures with grain sizes between 100 and 900 nm were achieved. The X-ray diffraction patterns of the sintered samples revealed that the m-t transformation in ZrO 2 was preserved. The fraction of tetragonal phase, between 25 and 45%, increases with the isotherm level. Such partial stabilisation of the tetragonal phase is attributed to the presence NiO in ZrO 2 .

show abstract

Section: Xrd Analysissupporting

confidence: 93%

Influence of Spark plasma sintering on the tetragonal phase of ZrO ₂ ‐NiO nanosized powders synthesised via oxidation of quenched melted Ni ₄₀ ‐Zr ₆₀ alloy

Messaoudene

Saïdi

Boutarek-Zaourar

et al. 2018

Micro & Nano Letters

View full text Add to dashboard Cite

show abstract

“…Joy et al [22] have studied the effect of annealing temperature on photoluminescence properties of ZrO 2 thin films and shown λ ex changes with coating. Sidhu et al [23] have shown that PL intensity depends on annealing temperature due to change in crystallinity and surface defects. However, there are no detailed reports on the effect of calcination and phase transformation on life time of carriers and photoluminescence.…”

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of zirconium oxide (ZrO₂) nanoparticles: effect of calcination temperature

Horti¹,

Kamatagi²,

Nataraj³

et al. 2020

Nano Ex.

126

View full text Add to dashboard Cite

In this article, we report the structural and optical properties of zirconium oxide (ZrO 2 ) nanoparticles synthesized via chemical co-precipitation method. The effect of calcination temperature on structural and optical properties of ZrO 2 nanoparticles is investigated through XRD, FESEM, EDX, FTIR, UV-Vis absorption, fluorescence emission and life time measurements. XRD spectrum reveals the tetragonal phase at calcination temperature 600°C and crystallinity of samples increases with calcination temperature. At 800°C the phase transition from tetragonal to tetragonal-monoclinic mixed phase is noticed. The FESEM images show the particles are of irregular shape and highly agglomerated. FTIR spectra also confirm the formation of ZrO 2 in crystalline phase. From UV-vis absorption spectra it is found a strong quantization and varying band gap with calcination temperature. The change in emission wavelength and intensity with phase change is observed form fluorescence emission spectra. At higher calcination temperature emission intensity is decreased which may be due to the phase change and the formation of surface defects. The life time measurements also reveal the different trap states and life time with calcination temperature.

show abstract

“…Also, as shown in Figure 1a, the strong absorption bands at 751 and 507 cm ¹1 have been assigned to the stretching vibrations of the Zr O group in ZrO 2 NPs. 36 In the case of the functionalized ZrO 2 NPs by epichlorohydrin (Figure 1b), the characteristic absorption bands at 2943 and 2877 cm ¹1 can be observed, which correspond to the stretching vibration of CH 2 groups. 42 From the presence of these bands it can be inferred that the ZrO 2 NPs were modified by epoxy groups successfully.…”

Section: Resultsmentioning

confidence: 95%

Green and Efficient Procedure for Suzuki–Miyaura and Mizoroki–Heck Coupling Reactions Using Palladium Catalyst Supported on Phosphine Functionalized ZrO2 NPs (ZrO2@ECP-Pd) as a New Reusable Nanocatalyst

Zarghani¹,

Akhlaghinia²

2016

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

In this article, palladium supported on phosphine functionalized ZrO 2 NPs (ZrO 2 @ECP-Pd) has been introduced as a novel and efficient nanocatalyst for SuzukiMiyaura and MizorokiHeck reactions. This new catalyst was prepared from the reaction of Pd(OAc) 2 and PPh 2 -functionalized ZrO 2 NPs, and then characterized using FT-IR, XRD, SEM, TEM, TGA and ICP techniques. The above experimental results showed that the synthesized catalyst existed as spheres with a mean size range of 1040 nm. The prepared ZrO 2 @ECP-Pd nanocatalyst was shown to be highly efficient in the Suzuki Miyaura and MizorokiHeck cross-coupling reactions of a wide range of aryl halides including electron-rich and electronpoor aryl iodides/bromides, and heteroaryl iodides, affording the corresponding products in good to excellent yields in short reaction times. The notable feature of the present protocol is the use of water and [bmim]PF 6 as environmentally benign solvents, which eliminate the need of toxic solvent. In addition to the aforementioned favorable properties, the nanocatalyst can be recovered and reused for the subsequent reactions (at least six times) without any appreciable loss of efficiency.

show abstract

Photoluminescence quenching of Zirconia nanoparticle by surface modification

Cited by 55 publications

References 32 publications

Influence of Spark plasma sintering on the tetragonal phase of ZrO ₂ ‐NiO nanosized powders synthesised via oxidation of quenched melted Ni ₄₀ ‐Zr ₆₀ alloy

Influence of Spark plasma sintering on the tetragonal phase of ZrO ₂ ‐NiO nanosized powders synthesised via oxidation of quenched melted Ni ₄₀ ‐Zr ₆₀ alloy

Structural and optical properties of zirconium oxide (ZrO₂) nanoparticles: effect of calcination temperature

Green and Efficient Procedure for Suzuki–Miyaura and Mizoroki–Heck Coupling Reactions Using Palladium Catalyst Supported on Phosphine Functionalized ZrO2 NPs (ZrO2@ECP-Pd) as a New Reusable Nanocatalyst

Contact Info

Product

Resources

About

Photoluminescence quenching of Zirconia nanoparticle by surface modification

Cited by 55 publications

References 32 publications

Influence of Spark plasma sintering on the tetragonal phase of ZrO 2 ‐NiO nanosized powders synthesised via oxidation of quenched melted Ni 40 ‐Zr 60 alloy

Influence of Spark plasma sintering on the tetragonal phase of ZrO 2 ‐NiO nanosized powders synthesised via oxidation of quenched melted Ni 40 ‐Zr 60 alloy

Structural and optical properties of zirconium oxide (ZrO2) nanoparticles: effect of calcination temperature

Green and Efficient Procedure for Suzuki–Miyaura and Mizoroki–Heck Coupling Reactions Using Palladium Catalyst Supported on Phosphine Functionalized ZrO2 NPs (ZrO2@ECP-Pd) as a New Reusable Nanocatalyst

Contact Info

Product

Resources

About

Influence of Spark plasma sintering on the tetragonal phase of ZrO ₂ ‐NiO nanosized powders synthesised via oxidation of quenched melted Ni ₄₀ ‐Zr ₆₀ alloy

Influence of Spark plasma sintering on the tetragonal phase of ZrO ₂ ‐NiO nanosized powders synthesised via oxidation of quenched melted Ni ₄₀ ‐Zr ₆₀ alloy

Structural and optical properties of zirconium oxide (ZrO₂) nanoparticles: effect of calcination temperature