A real-time comparison of mercury accumulation on noble metal thin films using gravimetric device

作者：Kabir K M Mohibul; Kandjani Ahmad Esmaielzadeh; Harrison Christopher J; Ippolito Samuel J; Sabri Ylias M^*; Bhargava Suresh K^*

来源：Superlattices and Microstructures, 2016, 100: 1151-1158.

DOI：10.1016/j.spmi.2016.10.084

• Elemental mercury vapor
• Quartz crystal microbalance
• Noble metals
• Gold
• Silver
• Palladium
• Platinum
• Mercury
• Amalgamation

We simultaneously compared and analyzed the mercury sorption and sensing performance of gold, silver, palladium and platinum using quartz crystal microbalance (QCM). Overall, the Au- and Ag-QCM showed superior Hg sensing performance over the Pd- and Pt-counterparts when tested toward a range of concentrations (24-365 ppb(v)) at various operating temperatures (35-105 degrees C). However, it was also found that the Hg sensing performance of each metal varied significantly with the operating temperature and is dependent on the concentration tested. For instance, the Ag-QCM exhibited 57% higher response magnitude than the Au-QCM when exposed toward 24 ppb(v) of Hg-0 vapor at 35 degrees C; however, the opposite trend was observed when the same concentration of Hg-0 vapor was tested at 105 degrees C, with Au-QCM showing 104% higher response magnitudes compared to the Ag-QCM. Moreover, the Ag-QCM showed higher response magnitudes than the Au-QCM for exposure toward 365 ppb(v) of Hg-0 vapor regardless of the operating temperature.

• 出版日期2016-12