Method for synthesizing SnO2/SiO2 core-shell nanospheres
A synthesis method and nanosphere technology, applied in the field of nanomaterials, can solve the problems of high equipment requirements, large investment, complicated processes, etc., and achieve the effects of low equipment requirements, high production efficiency and simple process
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Embodiment 1
[0031] First, according to the mass ratio of 10:50:35:5, weigh 30 microns in size and chemically pure CaSi 2 , CuO, Sn, Si powder, and mix them uniformly. Then, the resulting mixture was charged into a reactor, on which pyrotechnic powder was spread and magnesium bars were inserted. The magnesium strip is ignited to induce a self-propagating reaction. After the reaction is over, collect the SnO generated during the reaction on a stainless steel plate placed above the reactor. 2 / SiO 2 Core-shell nanospheres. Described ignition powder is 25-100 micron, the mass ratio of chemical purity is 58%KNO 3 , 18%Mg, 20%Al, 4%S mixture.
[0032] The product has been observed by transmission electron microscope, energy spectrum analysis and high-resolution transmission electron microscope, and the results prove that the obtained is high-purity SnO 2 / SiO 2 The core-shell nanospheres have an average radius of about 70nm.
[0033] figure 1 It is a transmission electron microscop...
Embodiment 2
[0035] First, according to the mass ratio of 13:55:30:2, weigh 50 microns in size and chemically pure CaSi 2 , CuO, Sn, Si powder, and mix them uniformly. Then, the resulting mixture was charged into a reactor, on which pyrotechnic powder was spread and magnesium bars were inserted. The magnesium strip is ignited to induce a self-propagating reaction. After the reaction is over, collect the SnO generated during the reaction on a stainless steel plate placed above the reactor. 2 / SiO 2 Core-shell nanospheres. The product has been observed by transmission electron microscope, energy spectrum analysis and high-resolution transmission electron microscope, and the results prove that the obtained is high-purity SnO 2 / SiO 2 The core-shell nanospheres have an average radius of about 50nm.
[0036] figure 2 It is a transmission electron microscope photo of the obtained product, which clearly presents the spherical shape of the obtained core-shell, and the radius of the nan...
Embodiment 3
[0038] First, according to the mass ratio of 15:60:25:0, weigh 100 microns in size and chemically pure CaSi 2 , CuO, Sn, Si powder, and mix them uniformly. Then, the resulting mixture was charged into a reactor, on which pyrotechnic powder was spread and magnesium bars were inserted. The magnesium strip is ignited to induce a self-propagating reaction. After the reaction is over, collect the SnO generated during the reaction on a stainless steel plate placed above the reactor. 2 / SiO 2 Core-shell nanospheres. The product has been observed by transmission electron microscope, energy spectrum analysis and high-resolution transmission electron microscope, and the results prove that the obtained is high-purity SnO 2 / SiO 2 The core-shell nanospheres have an average radius of about 45nm.
[0039] Image 6 It is a transmission electron microscope photograph of the obtained product, which clearly presents the spherical shape of the obtained core-shell, and the radius of th...
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