Exploring size-dependent optical property alterations in fine-tuning intermetallic PdCd nanocube sizes

Area of Science:

• Nanomaterials Synthesis
• Catalysis
• Physical Chemistry

Background:

• Controlling nanocrystal size is crucial for tuning properties.
• Intermetallic nanocrystals present unique challenges in size control due to phase transitions.
• Surface energy and diffusion dynamics complicate wet-chemistry growth.

Purpose of the Study:

• To synthesize size-tunable intermetallic palladium-cadmium (PdCd) nanocubes.
• To investigate the size-dependent optical and catalytic properties of PdCd nanocubes.
• To establish a wet-chemistry method for controlling nanocrystal size via precursor concentration.

Main Methods:

• Wet-chemistry synthesis of PdCd nanocubes.
• Adjustment of Cadmium (Cd) precursor concentration to control nanocrystal size (8-15 nm).
• Evaluation of light-induced catalytic activity in 4-nitrophenol reduction.

Main Results:

• Successfully synthesized PdCd nanocubes with tunable sizes from 8 to 15 nm.
• Observed distinct size-dependent optical properties in PdCd nanocubes.
• Demonstrated increased light-induced catalytic enhancement with increasing nanocube size.
• 15 nm PdCd nanocubes showed a 3.3-fold enhancement, while 8 nm cubes showed a 1.6-fold enhancement in catalysis.

Conclusions:

• Nanocrystal size significantly impacts the light-induced catalytic performance of intermetallic PdCd.
• Precursor concentration is an effective parameter for tuning nanocrystal size in wet-chemistry synthesis.
• This work provides a foundation for developing intermetallic nanocrystals with tailored catalytic functionalities.