Enhanced Cataluminescence Sensor Based on SiO₂/MIL-53(Al) for Detecting Isobutylaldehyde

Area of Science:

• Environmental Science
• Materials Science
• Analytical Chemistry

Background:

• Environmental security necessitates simple, rapid, and reliable methods for harmful gas detection.
• Trace detection of isobutylaldehyde is crucial for environmental monitoring.

Purpose of the Study:

• To develop a highly effective cataluminescence sensor for detecting trace isobutylaldehyde.
• To investigate the cataluminescence phenomenon and sensing mechanism of SiO2/MIL-53(Al) composites with isobutylaldehyde.

Main Methods:

• Fabrication of SiO2/MIL-53(Al) composites for sensor development.
• Utilized cataluminescence (CL) phenomenon for isobutylaldehyde detection.
• Optimized sensing conditions and explored the detection mechanism using GC-MS and DFT.

Main Results:

• A positive linear relationship was observed between CL signal intensity and isobutylaldehyde concentration (1.55-310 ppm, R²=0.9996).
• The minimum detectable concentration was as low as 0.49 ppm (S/N=3).
• The sensor demonstrated effective analysis with recoveries from 83.4% to 105% and RSDs from 4.8% to 9.4%.

Conclusions:

• The developed SiO2/MIL-53(Al) composite sensor is highly effective for sensitive and reliable detection of trace isobutylaldehyde.
• This cataluminescence methodology offers a promising approach for real-time environmental monitoring of isobutylaldehyde.