Metal-Free Cataluminescence Gas Sensor for Hydrogen Sulfide Based on Its Catalytic Oxidation on Silicon Carbide Nanocages
Metal-Free Cataluminescence Gas Sensor for Hydrogen Sulfide Based on Its Catalytic Oxidation on Silicon Carbide Nanocages
复制标题
基于碳化硅纳米笼催化氧化的无金属催化发光硫化氢气体传感器
DOI：
10.1021/acs.analchem.7b04566
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发表时间：
2017
影响因子：
7.4
通讯作者：
Lv Yi
中科院分区：
文献类型：
--
作者：
Wu Liqian;Zhang Lichun;Sun Mingxia;Liu Rui;Yu Lingzhu;Lv Yi
基于催化发光（CTL-）的传感器由于其高效的选择性、高灵敏度和快速性而成为最具吸引力和最有效的气体传感工具之一。金属基催化剂作为基于ctl的传感器的传感材料，容易带来成本高和重金属对环境的污染。更重要的是，金属基催化剂的长期稳定性通常很差。无金属催化剂具有环境友好、成本低、长期稳定等独特优势，是ctl传感器的理想材料。本文报道了一种基于无金属催化剂的CTL传感器的制备。采用湿法化学蚀刻法合成了掺f的笼状碳化硅。制备的产物对H2S具有快速、稳定、高选择性和敏感的催化响应。该传感器的稳定性至少在15天内表现得相当好。经过CTL测试，f掺杂的笼状SiC保留了其原始的形态、结构和化学成分。此外，据我们所知，这是第一份无金属CTL传感器的报告。无金属催化剂具有环境友好、成本低、长期稳定等优点，为CTL传感开辟了新的途径。
Cataluminescence- (CTL-) based sensors are among the most attractive and effective tools for gas sensing, owing to their efficient selectivity, high sensitivity, and rapidity. As the sensing materials of CTL-based sensors, metal-based catalysts easily bring about high costs and environmental pollution of heavy metals. More importantly, the long-term stability of metal-based catalysts is usually rather poor. Metal-free catalysts have unique advantages such as environmental friendliness, low costs, and long-term stability, making them promising materials for CTL-based sensors. Herein, we report the fabrication of a CTL sensor based on a metal-free catalyst. F-doped cage-like SiC was synthesized by wet chemical etching. The as-prepared products showed a rapid, stable, highly selective, and sensitive cataluminescent response to H2S. The stability of the sensor was demonstrated to be fairly good for at least 15 days. After CTL tests, F-doped cage-like SiC retained its original morphology, structure, and chemical composition. In addition, to the best of our knowledge, this is the first report of a metal-free CTL sensor. Metal-free catalysts are environmentally friendly and low in cost and exhibit long-term stability, which could open a new avenue of CTL sensing.