Enhanced cataluminescence sensing of MIL-53(Al)/Sb2SnO5 composites for isobutanol detection

Abstract In this study, MIL-53(Al) and Sb 2 SnO 5 were synthesized by hydrothermal and precipitation methods, respectively. The doped MIL-53(Al)/Sb 2 SnO 5 showed excellent catalytic properties, specifically for selectivity and sensitivity for isobutanol (IBN). To assess the catalytic properties of MIL-53(Al)/Sb 2 SnO 5 , an IBN gas sensor based on cataluminescence of MIL-53(Al)/Sb 2 SnO 5 was developed, and it demonstrated detection of IBN with high sensitivity, high specificity, fast detection, and good stability. The signal response and recovery time of IBN gas sensor were 0.5 s and 6 s, respectively, and a good linear relation was 0.050–2.5 μg ml −1 ( R 2 = 0.9956) with a low detection limit of 0.015 μg ml −1 . Further, the IBN sensor applied in the detection of real samples had satisfactory recoveries (90.0%–108%) with relative standard deviations of 3.2%–6.7%. The developed sensor based on MIL-53(Al)/Sb 2 SnO 5 has great prospects for the practical detection of IBN gas in the fields of environmental analysis, safety monitoring, etc.