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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Copper hydroxide nano and microcrystal: facile synthesis, shape evolution and their catalytic properties
Guanhua Lin1, Wenfeng Jia, Wensheng Lu
1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloids and Surfaces, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
Journal of Colloid and Interface Science
|October 29, 2010
Summary
Researchers precisely controlled copper hydroxide nano/microcrystal morphology using surfactant and NH4Cl concentration, yielding diverse shapes. These crystalline copper hydroxide structures show superior catalytic activity in oxidation reactions.
Area of Science:
- Materials Science
- Nanotechnology
- Catalysis
Background:
- Controlling nanomaterial morphology is crucial for tuning properties.
- Copper hydroxide (Cu(OH)2) nanomaterials have diverse applications.
- Surfactants play a key role in directing crystal growth.
Purpose of the Study:
- To control the morphology of copper hydroxide nano/microcrystals.
- To investigate the catalytic activity of different Cu(OH)2 morphologies.
- To understand the formation mechanism of Cu(OH)2 nano/microcrystals.
Main Methods:
- Synthesis of copper hydroxide nano/microcrystals using a tree-type surfactant (bis(amidoethyl-carbamoylethyl) octadecylamine, C18N3).
- Systematic variation of surfactant concentration, NH4Cl concentration, and reaction temperature.
- Characterization of crystal morphology and phase.
- Evaluation of catalytic activity in the oxidation of resorcinol using hydrogen peroxide (H2O2).
Main Results:
- Achieved controlled synthesis of various Cu(OH)2 morphologies, including plates, belts, wires, rods, and spheres.
- Demonstrated that NH4Cl concentration influences morphology, transforming elliptical plates to truncated square plates.
- Crystalline Cu(OH)2 exhibited significantly higher catalytic activity than amorphous Cu(OH)2 in resorcinol oxidation.
Conclusions:
- The surfactant C18N3 acts as a face-selective additive, enabling precise morphology control of Cu(OH)2.
- Optimized synthesis conditions allow for tailoring Cu(OH)2 crystal shapes for specific applications.
- The findings provide valuable insights into the fabrication of metal hydroxides and oxides with controlled morphologies and enhanced catalytic properties.
