Nanosized metal oxides were recommended as pH-sensitive materials to fabricate solid pH sensors with screen printable technique. The metal oxide electrodes studied in this paper showed a better selectivity to hydrogen...Nanosized metal oxides were recommended as pH-sensitive materials to fabricate solid pH sensors with screen printable technique. The metal oxide electrodes studied in this paper showed a better selectivity to hydrogen ions with the presence of alkali ions. Particularly, the outstanding advantage of these electrodes was that these electrodes were available to measure the pH of the highly corrosive system containing HF.展开更多
Titanium nitride was recommended as pH-sensitive materials to fabricate pH sensors. The TiN electrode studied in this paper showed a linear response in the pH range of 11-14 with a response slope of -60 mV/pH. The cor...Titanium nitride was recommended as pH-sensitive materials to fabricate pH sensors. The TiN electrode studied in this paper showed a linear response in the pH range of 11-14 with a response slope of -60 mV/pH. The correlation coefficient was 0.998. The response time of the electrode was about 1 min. It exhibits some advantages over the glass pH electrode in more rigid structure and better selectivity toward cations of alkali metals, effectively overcoming the interference of Na + in high pH solution. No interferences from commonly accompanying cations and anions were observed. The electrode also showed a high stability and a good reproducibility. The potential drift was less than 2 mV as measured in pH 13.5 and 14 solution for 2 h. When the electrode was alternately measured in the solution of pH 13.5 and 14 solution, the relative standard deviation estimated for six measurements were about 0.27% and 0.29%, respectively. In addition, the electrode was performed excellently in corrosion medium containing F -. The lifetime of the electrode was over 3 months.展开更多
文摘Nanosized metal oxides were recommended as pH-sensitive materials to fabricate solid pH sensors with screen printable technique. The metal oxide electrodes studied in this paper showed a better selectivity to hydrogen ions with the presence of alkali ions. Particularly, the outstanding advantage of these electrodes was that these electrodes were available to measure the pH of the highly corrosive system containing HF.
文摘Titanium nitride was recommended as pH-sensitive materials to fabricate pH sensors. The TiN electrode studied in this paper showed a linear response in the pH range of 11-14 with a response slope of -60 mV/pH. The correlation coefficient was 0.998. The response time of the electrode was about 1 min. It exhibits some advantages over the glass pH electrode in more rigid structure and better selectivity toward cations of alkali metals, effectively overcoming the interference of Na + in high pH solution. No interferences from commonly accompanying cations and anions were observed. The electrode also showed a high stability and a good reproducibility. The potential drift was less than 2 mV as measured in pH 13.5 and 14 solution for 2 h. When the electrode was alternately measured in the solution of pH 13.5 and 14 solution, the relative standard deviation estimated for six measurements were about 0.27% and 0.29%, respectively. In addition, the electrode was performed excellently in corrosion medium containing F -. The lifetime of the electrode was over 3 months.
