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A nanoflower, three-dimensional technology, applied in nanotechnology, tin oxide and other directions, can solve the problems of cumbersome preparation methods, environmental pollution, and impact on human health.
Inactive Publication Date: 2013-05-15
NANKAI UNIV
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Problems solved by technology
Traditional preparation of SnO 2 The method of nanomaterials not only has cumbersome preparation methods and high equipment requirements, but also uses volatile and toxic reagents, which affects human health and causes environmental pollution.
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Embodiment 1
[0020] 1) Weigh 0.45gSnCl 2 2H 2 O was dissolved in 20mL distilled water, stirred for 20min to obtain solution ①;
[0021] 2) Weigh 0.32g NaOH and 0.72g CTAB and dissolve in 20mL distilled water, stir for 20min to obtain solution ②;
[0022] 3) Mix the solution ① with the solution ②, and stir for 40 minutes to obtain a uniform solution ③;
[0023] 4) Transfer the solution ③ into a 50mL reaction kettle, and heat at 130°C for 24h;
[0024] 5) The product was centrifuged, washed with water and ethanol five times, dried at 60°C for 13 hours to obtain a yellow-brown product; roasted in a muffle furnace at 400°C for 4 hours to collect the yellow-brown product.
Embodiment 2
[0026] 1) Weigh 0.46gSnCl 2 2H 2 O was dissolved in 20mL distilled water and stirred for 20min to obtain a solution ④;
[0027] 2) Weigh 0.42g NaOH and 0.73g CTAB and dissolve in 20mL distilled water, stir for 20min to obtain the solution ⑤;
[0028] 3) Mix the solution ④ with the solution ⑤, and stir for 40 minutes to obtain a uniform solution ⑥;
[0029] 4) Transfer the solution ⑥ to a 50mL reaction kettle, and heat it with water at 130°C for 24h;
[0030] 5) The product was centrifuged, washed with water and ethanol five times, dried at 60°C for 13 hours to obtain a yellow-brown product; roasted in a muffle furnace at 400°C for 4 hours to collect the yellow-brown product.
Embodiment 3
[0032] For the three-dimensional multi-level SnO prepared in Examples 1 and 2 2 X-ray diffraction experiment (XRD) of nanoflower material: the phase analysis of the sample is carried out on the D / max-2500 X-ray diffractometer produced by Rigaku Corporation, the measurement conditions: graphite monochromatic detector, tube flow 100mA, CuKα radiation source , with a step width of 0.02°. Compared with the JCPDF standard spectrum (41-1445), the spectral lines of the sample are indexed, indicating that the products are all a single tetragonal SnO 2 The crystal system and XRD spectrum are as follows figure 1 , figure 2 shown.
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Abstract
The invention relates to a preparation method of three-dimensional multistage SnO2 nanoflowers, which is characterized in that the initial raw materials for preparing the SnO2 nanoflowers are SnCl2.2H2O, NaOH, CTAB (cetyltrimethylammonium bromide) and deionized water. The preparation process comprises the steps of hydrothermal treatment, centrifuging, washing, drying and roasting. The structural feature of the prepared SnO2 nanoflowers is a three-dimensional multistage flower-like structure assembled from three-dimensional SnO2 nanosheets. The diameters of the prepared SnO2 nanoflowers are 1-3 mu m, and the nanosheets are 20-40nm thick. The invention discloses a specific preparation method of the three-dimensional multistage SnO2 nanoflowers. The raw materials for preparing the SnO2 nanoflowers are cheap and accessible; the method for preparing the SnO2 nanoflowers is environment-friendly, and has the advantages of low hydrothermal temperature and low energy consumption; the method for preparing the SnO2 nanoflowers is simple to operate, also has the advantages of high repeatability and high yield, and is mass production; and the three-dimensional multistage SnO2 nanoflowers have special and peculiar shape, can be used as a material for sensors, catalysts, catalyst supports and the like, and has favorable application prospects.
Description
technical field [0001] The invention relates to a three-dimensional multilevel SnO 2 Preparation method of nanoflowers. technical background [0002] SnO 2 It is a typical n-type semiconductor metal oxide with a band gap of 3.6eV. As one of the most important functional materials, SnO 2 It is widely used in sensor materials, catalysts, photocatalysts, catalyst supports, nanofiltration membranes, thermal mirrors, enamel and electromagnetic materials, etc. In recent years, with the development of nanoscience, nanomaterials have attracted much attention because of their unique properties such as electricity, light, heat, magnetism, and force. The size and shape of nanomaterials will greatly affect its own properties, thus affecting its application prospects. At present, people's research on nanomaterials has begun to develop from zero-dimensional and one-dimensional to multi-dimensional, and many rich shapes have been synthesized. hotspot. Nano SnO 2 As functional materi...
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