A novel cataluminescence sensor for rapid detection of methanol at low working temperature based on Ni/CeO₂ catalyst

Cataluminescence (CTL) is an attractive chemiluminescence phenomenon that occurs at the gas-solid catalytic interface, and there is a strong anticipation for highly efficient CTL. Herein, Ni/CeO₂ catalyst was successfully developed by using the <i>in situ</i> doping method. In comparison with the CeO₂ nanoparticles and NiO nanoparticles, Ni/CeO₂ catalyst exhibited superior CTL performance toward methanol. Based on the outstanding catalytic performance of Ni/CeO₂, a novel CTL sensor with excellent sensitivity, good selectivity, and satisfactory stability was fabricated for the detection of methanol at low working temperature. Notably, the reaction time and recovery time of the proposed CTL sensor for methanol detection were as short as 7 s and 6 s, respectively. The proposed CTL sensor was successfully applied to detect methanol in commercial white wine samples with recoveries of 107.86-113.09%. The relative standard deviation for the detection of methanol in commercial white wine samples was less than 7%. Accordingly, the proposed CTL sensor with the advantage of fast response and reliable characteristics provided a promising choice for rapid detection of methanol. This work provided a new direction for the development of CTL sensors with high performance and low working temperature.