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Method for preparing TiO2 neutral hydrosol with visible-light response and two-dimensional network-like cross-linked structure
The invention discloses a method for preparing TiO2 neutral hydrosol with visible-light response and a two-dimensional network-like cross-linked structure. The nitrogen-doped TiO2 hydrosol is synthesized by virtue of a one-step hydrothermal method and the method comprises the following specific steps: (1) adding NH3.H2O into an aqueous solution of titanium salt and adjusting the pH to 7; (2) filtering and washing obtained white precipitate until the corresponding impurity anions are not detected; (3) ultrasonically dispersing the white precipitate in distilled water, heating to 40 DEG C, adding an H2O2 solution to obtain transparent orange peroxy titanic acid solution (PTA); (4) adding a certain amount of melamine as a nitrogen source into the peroxy titanic acid as (PTA) gel to obtain a suspension; and (5) stirring the suspension for 10-60 minutes, transferring to a hydrothermal reactor and carrying out hydrothermal reaction for 4-12 hours to obtain the yellow nitrogen-doped TiO2 hydrosol after the reaction is completed. The synthesized TiO2 hydrosol is of a two-dimensional network-like cross-linked structure and exhibits good photocatalytic self-cleaning capability under visible light.
Method for preparing TiO2 neutral hydrosol with visible-light response and two-dimensional network-like cross-linked structure
The invention discloses a method for preparing TiO2 neutral hydrosol with visible-light response and a two-dimensional network-like cross-linked structure. The nitrogen-doped TiO2 hydrosol is synthesized by virtue of a one-step hydrothermal method and the method comprises the following specific steps: (1) adding NH3.H2O into an aqueous solution of titanium salt and adjusting the pH to 7; (2) filtering and washing obtained white precipitate until the corresponding impurity anions are not detected; (3) ultrasonically dispersing the white precipitate in distilled water, heating to 40 DEG C, adding an H2O2 solution to obtain transparent orange peroxy titanic acid solution (PTA); (4) adding a certain amount of melamine as a nitrogen source into the peroxy titanic acid as (PTA) gel to obtain a suspension; and (5) stirring the suspension for 10-60 minutes, transferring to a hydrothermal reactor and carrying out hydrothermal reaction for 4-12 hours to obtain the yellow nitrogen-doped TiO2 hydrosol after the reaction is completed. The synthesized TiO2 hydrosol is of a two-dimensional network-like cross-linked structure and exhibits good photocatalytic self-cleaning capability under visible light.
Method for preparing TiO2 neutral hydrosol with visible-light response and two-dimensional network-like cross-linked structure
XIONG JIRU (author)
2015-05-06
Patent
Electronic Resource
English
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