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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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Nano-sized mesoporous phosphated tin oxide as an efficient solid acid catalyst.

S M Hassan1, M A Mannaa1,2, Amr Awad Ibrahim1,3

  • 1Chemistry Department, Faculty of Science, Mansoura University Mansoura Egypt amr_awad@mans.edu.eg.

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|May 6, 2022
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Summary
This summary is machine-generated.

This study developed a novel mesoporous tin oxide catalyst activated with phosphate species. The optimized 25% phosphate-loaded catalyst achieved a 93.2% yield in hydroquinone diacetate synthesis with excellent reusability.

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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Mesoporous tin oxide (mSnO2) is a promising catalyst.
  • Surface modification is key to enhancing catalytic performance.
  • Phosphate species can alter the properties of metal oxide catalysts.

Purpose of the Study:

  • To prepare and characterize phosphate-activated mesoporous tin oxide catalysts.
  • To investigate the effect of phosphate loading on catalyst structure and acidity.
  • To evaluate the catalytic performance for hydroquinone diacetate synthesis.

Main Methods:

  • Adsorption of phosphate ions onto tin oxyhydroxide.
  • Characterization using FTIR, thermal analysis, and X-ray diffraction.
  • Acidity measurements via nonaqueous titration and FTIR of adsorbed pyridine.

Main Results:

  • Phosphate addition stabilized the mesoporous structure and nanoscale crystalline size of mSnO2.
  • Phosphate species polymerized to form a stabilizing SnP2O7 layer.
  • Maximized surface acidity and acid strength were achieved at 25 wt% PO4 3- loading.
  • The 25% PO4 3-/mSnO2 catalyst yielded 93.2% hydroquinone diacetate with 100% selectivity.

Conclusions:

  • Phosphate activation effectively enhances the catalytic properties of mesoporous tin oxide.
  • The optimal phosphate loading (25 wt%) maximizes both acidity and catalytic activity.
  • The developed catalyst demonstrates high efficiency, selectivity, and reusability for hydroquinone diacetate synthesis.