Preparation and characterization of Ce0.95Zr0.05O2 nanopowders obtained by sol–gel and template methods

“…Since catalytic activity, reducibility and ionic‐electronic conductivity govern the performance of these materials in their different applications, many synthesis approaches have been explored to prepare CeO 2 ‐ZrO 2 mixed oxides (i.e. solid‐state reaction, coprecipitation, nitrate‐glycine combustion or sol‐gel methods) in order to get better control of the crystallite size, pore‐volume, specific surface area, and composition homogeneity.…”

Section: Introductionmentioning

confidence: 99%

Ce_0.9Zr_0.1O₂Mixed Oxide Prepared by the Citrate Route: Impact of Synthesis Conditions on Physicochemical and Redox Properties

2020

View full text Add to dashboard Cite

The aim of this work is to study the effect of the citric acid to metal molar ratio (CA/M) used in the citrate synthesis route on the structural, morphological and redox properties of CeO 2 -ZrO 2 mixed oxides. The CA/M ratio strongly affects reducibility, crystallite size and texture. The increase in calcination temperature promotes sample crystallinity while nanometric sizes remain up to 1000°C. H 2 -TPR, in situ dispersive X-ray absorption (DXAS) and Raman experiments show that samples [a] R.

show abstract

“…Polystyrene (PS) are widely used in the preparation of inverse opal materials due to the low preparation cost, mild processing condition method and has the advantage that raw materials can be easily obtained [13,14]. Zirconia as an important strategic material with a large dielectric constant, good chemical and photo-chemical stability and high optical transparency holds considerable potential for realizing a wide photonic band gap and is an important material for constructing inverse opal materials [15,16] Building on advances that demonstrated the benefit of including carbon within the opal structure, in this study, we employed the samples sintered in nitrogen atmosphere with flow rate of 0.8 L min -1 to produce in situ carbon which could modify the inverse opal zirconia pigment and improve the color saturation, making it have a broader application prospect.…”

Section: Introductionmentioning

confidence: 99%

Preparation and modification of inverse opal zirconia pigment

Liu

Wang

et al. 2020

SCI SINTER

View full text Add to dashboard Cite

Inverse opal zirconia pigment prepared by traditional process has the disadvantages of low color saturation and variegated color which restrict its further application. In this work, the inverse opal zirconia pigment was prepared by colloidal crystal template fabricated using polystyrene microspheres with particle size of 340 ? 10 nm as raw material and further modified by sintering at 600 ?C for 2 h with heating rate of 2 ?C/min in an atmosphere tube of 0.8 L min-1 nitrogen flow. The morphology, phase crystallinity and color performance of the inverse opal zirconia pigment before and after modification were characterized in detail and the modified mechanism was investigated. The results showed that morphology of the inverse opal zirconia pigment before modification was basically a highly ordered porous structure, the phase was relatively pure, and the overall appearance was variegated color. Some parts of the samples exhibited low color saturation and different areas showed various colors, indicating that the samples had certain angle dependence. After modification, the samples showed bigger-area single blue-green color, suggesting that the color saturation was significantly improved and the angle dependence was reduced evidently. The mechanism for modification was that the zirconia precursor and polystyrene templates were carbonized when sintered in nitrogen atmosphere. The generated in-situ carbon remained in the samples and absorbed the tray background light, which significantly suppressed the multiple scattering of structural defects.

show abstract

Preparation and characterization of Ce0.95Zr0.05O2 nanopowders obtained by sol–gel and template methods

Cited by 9 publications

References 48 publications

Structural and cathodoluminiscent properties of Zr0.95Ce0.05O2 nanopowders prepared by sol–gel and template methods

Structural and cathodoluminiscent properties of Zr0.95Ce0.05O2 nanopowders prepared by sol–gel and template methods

Ce_0.9Zr_0.1O₂Mixed Oxide Prepared by the Citrate Route: Impact of Synthesis Conditions on Physicochemical and Redox Properties

Preparation and modification of inverse opal zirconia pigment

Contact Info

Product

Resources

About

Preparation and characterization of Ce0.95Zr0.05O2 nanopowders obtained by sol–gel and template methods

Cited by 9 publications

References 48 publications

Structural and cathodoluminiscent properties of Zr0.95Ce0.05O2 nanopowders prepared by sol–gel and template methods

Structural and cathodoluminiscent properties of Zr0.95Ce0.05O2 nanopowders prepared by sol–gel and template methods

Ce0.9Zr0.1O2Mixed Oxide Prepared by the Citrate Route: Impact of Synthesis Conditions on Physicochemical and Redox Properties

Preparation and modification of inverse opal zirconia pigment

Contact Info

Product

Resources

About

Ce_0.9Zr_0.1O₂Mixed Oxide Prepared by the Citrate Route: Impact of Synthesis Conditions on Physicochemical and Redox Properties