Green biomimetic preparation method of titanium dioxide nano material

Abstract

A green biomimetic preparation method of a titanium dioxide nano material. The method comprises steps of: adding a proper amount of titanium trichloride, egg white, pollen or a yeast biological template to water; stirring evenly; standing at low temperature for several days; washing, filtering and drying to obtain the titanium dioxide nano materials with different crystal structures; and further calcining to increase crystallinity of titanium dioxide nanoparticle but maintain the original crystal structure, wherein different biological templates result in different microstructures of the obtained material. The method has advantages of mild reaction condition, simple operation, no requirement on special instrument and experimental conditions, cheap, easily available, environment-friendly, easily removed template, controllable crystal structure and morphology of the prepared titanium dioxide, and high repeatability.

Description

technical field [0001] The present invention relates to an appropriate amount of titanium trichloride solution in the presence of a biological template, standing at low temperature for several days, washing, filtering, and drying to obtain titanium dioxide nanomaterials of different crystal forms, and further calcining the obtained titanium dioxide nanomaterials to increase the crystallinity, However, the original crystal form is still maintained; and the biological templates are different, and the microscopic morphology presented is also different. Background technique [0002] Titanium dioxide is widely used in the field of health care, photocatalysis, solar cells, and lithium-ion batteries due to its non-toxic, harmless, non-corrosive, high surface activity, high catalytic efficiency, and excellent chemical and thermal stability. , Electrochromic devices, etc. However, the dispersibility, particle size, specific surface area, hydrophilicity, surface functionalization, el...

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Problems solved by technology

However, the hydrothermal method is a reaction under high temperature and high pressure, which requires high equipment, complicated operation, and high energy consumption, so the cost is relatively high; the nano-powder product prepared by the high-temperature gas phase reaction method has high purity, small particle size, and high surface activity. Large, good dispersion, small degree of agglomeration, high degree of automation, but its preparation temperature is high, corrosion is serious, the requirements for equipment materials are strict, and the requirements for accurate control of process parameters are high, so the product cost is high

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