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Metal-Free Cataluminescence Gas Sensor for Hydrogen Sulfide Based on Its Catalytic Oxidation on Silicon Carbide Nanocages
Analytical Chemistry ( IF 6.7 ) Pub Date : 2017-12-07 00:00:00 , DOI: 10.1021/acs.analchem.7b04566 Liqian Wu , Lichun Zhang , Mingxia Sun , Rui Liu , Lingzhu Yu 1 , Yi Lv
Analytical Chemistry ( IF 6.7 ) Pub Date : 2017-12-07 00:00:00 , DOI: 10.1021/acs.analchem.7b04566 Liqian Wu , Lichun Zhang , Mingxia Sun , Rui Liu , Lingzhu Yu 1 , Yi Lv
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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.
中文翻译：
基于碳化硅纳米笼催化氧化的无金属硫化氢气体传感器
基于催化发光（CTL）的传感器因其高效的选择性，高灵敏度和快速性而成为最有吸引力，最有效的气体传感工具之一。作为基于CTL的传感器的传感材料，基于金属的催化剂容易带来高成本和重金属的环境污染。更重要的是，金属基催化剂的长期稳定性通常很差。无金属催化剂具有独特的优势，例如环境友好，成本低和长期稳定性，使其成为基于CTL的传感器的有前途的材料。在这里，我们报告基于无金属催化剂的CTL传感器的制造。通过湿法化学蚀刻合成了F掺杂的笼状SiC。所制备的产品显示出对H的快速，稳定，高选择性和敏感的催化发光反应2传感器的S的稳定性被证明是对于至少15天相当好的。经过CTL测试后，掺F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，这是无金属CTL传感器的首次报道。不含金属的催化剂对环境友好且成本低廉，并具有长期稳定性，这可能会开辟CTL传感的新途径。
更新日期：2017-12-07
中文翻译：
基于碳化硅纳米笼催化氧化的无金属硫化氢气体传感器
基于催化发光（CTL）的传感器因其高效的选择性，高灵敏度和快速性而成为最有吸引力，最有效的气体传感工具之一。作为基于CTL的传感器的传感材料，基于金属的催化剂容易带来高成本和重金属的环境污染。更重要的是，金属基催化剂的长期稳定性通常很差。无金属催化剂具有独特的优势，例如环境友好，成本低和长期稳定性，使其成为基于CTL的传感器的有前途的材料。在这里，我们报告基于无金属催化剂的CTL传感器的制造。通过湿法化学蚀刻合成了F掺杂的笼状SiC。所制备的产品显示出对H的快速，稳定，高选择性和敏感的催化发光反应2传感器的S的稳定性被证明是对于至少15天相当好的。经过CTL测试后，掺F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，这是无金属CTL传感器的首次报道。不含金属的催化剂对环境友好且成本低廉，并具有长期稳定性，这可能会开辟CTL传感的新途径。
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