A yolk-double-shelled heterostructure-based sensor for acetone detecting application

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• High-performance gas sensors require materials with high specific surface area and efficient electron transport.
• Material configuration and interfacial design are critical for optimizing gas-sensing properties.

Purpose of the Study:

• To develop a novel porous NiO-ZnO hybrid yolk-double-shelled sphere material for enhanced gas sensing.
• To investigate the structure-property relationship of the hybrid material for gas sensor applications.

Main Methods:

• Synthesis of porous NiO-ZnO hybrid yolk-double-shelled spheres.
• Fabrication and testing of gas sensors using the hybrid material.
• Comparison of sensor performance with single-component NiO material.

Main Results:

• The NiO-ZnO hybrid material exhibited a higher gas response (7.5) compared to NiO.
• The hybrid sensor demonstrated significantly faster response (8 s) and recovery (13 s) times.
• The unique yolk-double-shelled structure and synergistic electronic interaction between NiO and ZnO were identified as key factors.

Conclusions:

• The porous NiO-ZnO hybrid yolk-double-shelled spheres represent a promising material for high-performance gas sensors.
• The engineered structure and heterojunction effect enhance gas-sensing capabilities.
• This work offers a new strategy for designing advanced gas-sensing materials.