Porous zinc oxide micro powder and preparation method and application thereof
A porous zinc oxide and micron powder technology, which is applied in zinc oxide/zinc hydroxide, measuring devices, and material analysis through optical means, can solve the problems of many raw materials, difficult industrial production, complicated processes, etc., and achieve less material consumption , easy operation, energy-saving and time-saving effect
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Embodiment 1
[0028] The concrete steps of preparation are:
[0029] Step 1, the zinc chloride solution that concentration is 0.01M is added dropwise in the oxalic acid saturated solution of 70 ℃ to the temperature under stirring earlier; Wherein, the speed of dripping zinc chloride solution in the oxalic acid saturated solution is 2ml / min, obtains white precipitate. After repeated washing of the white precipitate with water and ethanol in sequence, it was dried; wherein, the number of times of repeated washing of the white precipitate with water and ethanol was 3 times, and the temperature during the drying process was 70° C. for 3 hours to obtain two Hydrated zinc oxalate precursor.
[0030] Step 2, the dihydrate zinc oxalate precursor is placed at a temperature of 480 ° C for 2 hours and roasted to obtain the following: figure 1 shown in the curve in a, and approximated by figure 1 b. figure 1 c and figure 1 The porous zinc oxide micron powder shown in d.
Embodiment 2
[0032] The concrete steps of preparation are:
[0033] Step 1, the zinc chloride solution that concentration is 0.015M is added dropwise in the oxalic acid saturated solution of 75 ℃ to the temperature under stirring earlier; Wherein, the speed of dripping zinc chloride solution in the oxalic acid saturated solution is 2ml / min, obtains white precipitate. After repeated washing of the white precipitate with water and ethanol in sequence, it was dried; wherein, the number of times of repeated washing of the white precipitate with water and ethanol was 3 times, and the temperature during the drying process was 75° C., and the time was 2.5 h. Zinc oxalate dihydrate precursor.
[0034] Step 2, put the dihydrate zinc oxalate precursor at a temperature of 490 ° C for 1.5 hours to prepare the following figure 1 shown in the curve in a, and approximated by figure 1 b. figure 1 c and figure 1 The porous zinc oxide micron powder shown in d.
Embodiment 3
[0036] The concrete steps of preparation are:
[0037] Step 1, the zinc chloride solution that concentration is 0.02M is added dropwise to the saturated oxalic acid solution of 80 DEG C at the temperature under stirring earlier; Wherein, the speed of adding zinc chloride solution dropwise in the saturated oxalic acid solution is 2ml / min, obtains white precipitate. After repeated washing of the white precipitate with water and ethanol in sequence, it was dried; wherein, the number of times of repeated washing of the white precipitate with water and ethanol was 4 times, and the temperature during the drying process was 80° C. and the time was 2 h, to obtain two Hydrated zinc oxalate precursor.
[0038] In step 2, the precursor of zinc oxalate dihydrate is roasted at a temperature of 500°C for 1.5 hours to obtain the following: figure 1 As shown in the curve in a, and as figure 1 b. figure 1 c and figure 1 The porous zinc oxide micron powder shown in d.
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