Results (
Thai) 1:
[Copy]Copied!
The SnO2 nanocrystallines were prepared by a facile hydrother- mal method. Typically, 4.00mmol of SnCl4·5H2O was dispersed in 10 mL of distilled water under stirring until the SnCl4 ·5H2 O was dissolved completely, followed by the addition of 12 mL of DMF. The solution was stirred for 20 min and then 20 mL of 2.00 M NaOH solution was dropwise added into the above solution under stir- ring to form a white solution. After being stirred for about 30 min,.more distilled water was added into the above solution to make the whole volume of the solution reach 60 mL (water:DMF = 4:1, v/v). This resultant homogenous solution was put into a 90 mL stain- less steel Teflon-lined autoclave. Subsequently, the autoclave was sealed and heated up at 160◦C for 15h in oven. After this, the autoclave was naturally cooled to room temperature, and then the resultant products were recovered by repeated centrifugation and washed with ethanol and water, respectively. Finally, the obtained products were dried at 60 ◦ C for 24 h and further calcined at 400 ◦ C for 1 h in a furnace to obtain the pure SnO2 .The SnO2-Pd-Pt-In2O3 composite was prepared from a mixture of SnO2, Pd, Pt and In2O3 with a weight ratio of 100:0.8:2:30 (The weight ratio was proved to be the most promising for the sens- ing properties of methanol in our incipient experiments). Then, the right amount of distilled water was added to the mixture and ground for further 1 h. After that, the as-prepared powders were dried at room temperature.
Being translated, please wait..
