A new cataluminescence sensor for carbon tetrachloride using its catalytic reduction by hydrogen on palladium/carbon surface

作者：Jia Yunzhen; Zhang Huili; Wu Lan; Lv Yi; Hou Xiandeng^*

来源：Microchemical Journal, 2010, 95(2): 359-365.

DOI：10.1016/j.microc.2010.02.013

• Chemiluminescence
• Cataluminescence
• Carbon tetrachloride
• Hydrodechlorination
• Palladium/carbon

A new cataluminescence (CTL) sensor was developed based on the chemiluminescence (CL) emission from the catalytic hydrodechlorination of carbon tetrachloride on the surface of palladium/carbon catalyst The factors influencing the CTL. signal, such as the catalyst, carrier gas, gas flow rate, temperature and the CL wavelength, were investigated in detail Under the optimal conditions, the linear range of the CTL intensity versus concentration of carbon tetrachloride was 4 7-235 mu g/mL (R = 09944, n = 7), with a limit of detection of 0 7 mu g/mL (sigma = 3) GC/MS results suggest that the possible cm mechanism of the reduction is the formation of center dot CCl3 radicals The center dot CCl3 radicals combine with center dot H free atoms or capture hydrogen atoms nom H-2 molecules to form excited CHCl3 intermediates, which decay from the excited-state to the ground giving CTL. emission for the detection It is also found that some benzene derivatives with alpha-H of branched-chain, such as toluene.

• 出版日期2010-7
• 单位四川大学