The rapid and sensitive detection techniques for CO are highly essential for public health and environmental pollution. Herein, a photocatalysis enhanced cataluminescence (CTL) gas sensor with metal-free catalyst for CO was developed. Due to the low CTL reaction activity of CO, photocatalysis which could activate CO was chosen as effective signal amplification technology to improve response sensitivity of CO. Meanwhile, self-assembled 3,4,9,10-Perylenetetracarboxylic Diimide (PDINH), which has stacked ordered structure with π-π stacking, was first used as metal-free catalyst for CO oxidation in CTL process. The π-π stacking and layered structure in PDINH are beneficial for the adsorption of O₂ and CO. Therefore, amplified CTL signal was acquired because of the important role of photocatalysis and the sensing material in CTL process. Under the optimal experimental conditions, a detection limit (3σ) of 0.002 µg mL^-1 CO is found in the proposed method, which has been further improved comparing to that of without photocatalysis. The realization of combining photocatalysis with CTL for the first time gives us a perspective on building a new pretreatment strategy for CTL detection.

CO的快速灵敏检测技术对于公共卫生和环境污染至关重要。本文中，开发了具有用于CO的无金属催化剂的光催化增强催化发光（CTL）气体传感器。由于CO的CTL反应活性低，因此选择可以活化CO的光催化作为有效的信号放大技术，以提高CO的响应灵敏度。同时，自组装的3,4,9,10-Per四甲酸二酰亚胺（PDINH）具有π-π堆积的堆积有序结构首先被用作CTL工艺中CO氧化的无金属催化剂。PDINH中的π-π堆积和层状结构有利于O ₂的吸附因此，由于光催化和传感材料在CTL过程中的重要作用，获得了放大的CTL信号。在最佳实验条件下，该方法的检出限（3σ）为0.002 µg mL ^-1 CO，与未进行光催化处理的检出限相比已有进一步改进。首次实现将光催化与CTL结合的实现为我们提供了构建CTL检测新预处理策略的视角。