Preparation method of composite dopped tin dioxide nano-crystal material
A nanocrystalline material, tin dioxide technology, applied in tin oxide, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of low sensitivity of sensor devices, harsh reaction conditions, complex production process, etc., to achieve flexible material design, The effect of low production cost and simple synthesis process
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Embodiment 1
[0014] Embodiment 1. Setting ZnO accounts for 9% by weight in the finished product, calculates and draws raw material molar ratio according to reaction formula as SnCl 2 : ZnCl 2 :Na 2 CO 3 : NaCl=7:1:8:48, ZnO / (ZnO+SnO 2 )≈8.45wt%. In the experiment, the mass ratio of balls to materials was 15:1. The raw materials were mixed and put into a high-energy ball mill in a planetary ball mill. The mill speed was 1400rpm, and the ball milling time was 6h. The precursor was heat-treated at 500°C for 2h to obtain a semi-finished product. After that, carry out vacuum filtration, wash repeatedly with distilled water to remove the NaCl therein, and finally put the filtrate in a constant temperature drying oven and dry it at 80°C to obtain the finished product, which is analyzed by X-ray diffraction (XRD) (see Fig. 2) and scanning electron microscope energy spectrum analysis (see Figure 3), it can be seen from the above analysis that the finished product is SnO containing ZnO 2 Nanocry...
Embodiment 2
[0015] Example 2. Set CdO to account for 5% by weight in the finished product, and calculate the raw material molar ratio according to the reaction formula as SnCl 2 : CdCl 2 :Na 2 CO 3 : NaCl=16:1:17:85, CdO / (CdO+SnO 2 )≈5wt%, the mass ratio of balls to materials in the experiment was 10:1, the raw materials were weighed according to the reaction ratio, mixed and put into a high-energy ball mill in a planetary ball mill, the mill speed was 1400rpm, and the ball milling time was 6h. Lower thermal treatment 2h obtains semi-finished product, carries out vacuum suction afterwards, removes NaCl wherein with repeated washing with distilled water, finally filtrate is placed in constant temperature drying oven and dries, obtains finished product, and finished product is carried out X-ray diffraction (XRD) analysis ( See Fig. 4) and energy spectrum analysis (see Fig. 5), know that finished product is the SnO containing CdO by the above analysis 2 Nanocrystalline, Cd atoms into SnO...
Embodiment 3
[0016] Example 3. Setting Fe 2 o 3 In the finished product, the weight percentage accounts for 9%, and the reaction molar ratio calculated according to the reaction formula is SnCl 2 : FeCl 3 :Na 2 CO 3 : NaCl=5:1:6.5:39, Fe in the finished product 2 o 3 / (Fe 2 o 3 +SnO 2 )≈9.59%, the mass ratio of balls to materials in the experiment was 12:1, the raw materials were weighed according to the reaction ratio, mixed and put into a high-energy ball mill in a planetary ball mill, the mill speed was 1400rpm, and the ball milling time was 6h. Lower thermal treatment 2h obtains semi-finished product, carries out vacuum suction afterwards, removes NaCl wherein with repeated washing with distilled water, finally filtrate is placed in constant temperature drying oven and dries, obtains finished product, and finished product is carried out X-ray diffraction (XRD) analysis ( See Figure 6), it is known from the analysis that most of the finished products are SnO 2 characteristic d...
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