Solvothermal synthetic method of TiO2 hollow-structure submicron spheres
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A technology of hollow structure and synthesis method, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc.
Active Publication Date: 2015-08-05
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Both ethylene glycol dimethyl ether and acetylacetone are conventional reagents. There have been some reports on the synthesis of TiO2 hollow microspheres, but ethylene glycol dimethyl ether and acetylacetone were used as solvents to synthesize TiO 2Micro-nano materials have not been reported yet
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Embodiment 1
[0019] Mix acetylacetone and ethylene glycol dimethyl ether at a volume ratio of 1:4 to form a mixed solvent. After stirring evenly, add 2ml of tetra-n-butyl titanate (TBT), then fully stir and transfer the mixed solution to the reaction kettle, 200 °C for 12 hours. After natural cooling, TiO was obtained by centrifugation, washing and drying. 2 Hollow structure submicron spheres ( figure 1 ), the microsphere diameter is 450-550 nm.
Embodiment 2
[0021] Mix acetylacetone and ethylene glycol dimethyl ether at a volume ratio of 1:4 to form a mixed solvent. After stirring evenly, add 2ml of tetra-n-butyl titanate (TBT), then fully stir and transfer the mixed solution to the reaction kettle, 200 °C for 24 hours. After natural cooling, TiO was obtained by centrifugation, washing and drying. 2 Hollow structure submicron spheres ( figure 2 ), the diameter of microspheres is 500-600 nm.
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Abstract
The invention discloses a solvothermal synthetic method of TiO2 hollow-structure submicron spheres, wherein the solvothermal synthetic method comprises the steps of mixing acetylacetone with glycol dimethyl ether to obtain a mixed solvent, adding tetra-n-butyl titanate or tetra-isopropyl titanate with fully stirring, performing a reaction at 160-230 DEG C for 6-24 h in a reaction kettle, naturally cooling a reaction product, and separating, washing and drying the reaction product to obtain the TiO2 hollow-structure submicron spheres. The solvothermal synthetic method is mild in reaction conditions, is simple in process, is uniform in product particle size and is high in yield. The TiO2 hollow-structure submicron spheres have wide applications in the fields of solar cells, photo-catalysis, lithium ion batteries and the like.
Description
technical field [0001] The invention belongs to the preparation of inorganic nanometer materials, in particular to a kind of TiO 2 Solvothermal synthesis method of hollow structure submicron spheres. Background technique [0002] Titanium dioxide is widely used in photocatalysis, solar cells, lithium-ion batteries and other fields due to its advantages of non-toxicity, rich content, stability and photoactivity. With the rapid development of nanomaterials science, it has been possible to control TiO in the range of micro-nanoscale 2 The size and shape of the material. So far, various forms of TiO have been successfully prepared 2 Micro-nano materials, including zero-dimensional materials, such as quantum dots, nano-clusters, etc., one-dimensional materials, such as nanorods, nanowires, nanotubes, etc., two-dimensional materials, such as nanosheets, nanobelts, etc. Three-dimensional materials, such as micro-nanospheres, micro-nano hierarchical structures, etc. Compared wi...
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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 胡林华李兆乾莫立娥戴松元
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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