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A preparation method of calcium-doped titanium dioxide nanofiber photocatalyst

A nanofiber and titanium dioxide technology, which is applied in the field of preparation of titanium dioxide nanofiber photocatalyst, can solve the problems of limiting the application in the field of photocatalysis, and achieve the effect of improving the photocatalytic performance.

Inactive Publication Date: 2019-10-22
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 The bandgap width is 3.0-3.2 eV, and it can only absorb in the ultraviolet region, and ultraviolet light only accounts for 3%-5% of sunlight, which seriously limits its application in the field of photocatalysis.

Method used

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  • A preparation method of calcium-doped titanium dioxide nanofiber photocatalyst
  • A preparation method of calcium-doped titanium dioxide nanofiber photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0013] (1) Add 1mL of acetic acid and 1.1g of polyvinylpyrrolidone to 9mL of ethanol solution, and form a transparent solution A after stirring;

[0014] (2) Add 0.9mL isopropyl titanate and 0.01g calcium acetate to the solution A prepared in (1); after stirring evenly, a transparent sol solution B is obtained; (3) Electrospin the sol solution B prepared above Silk. The prepared electrospun sample was dried at room temperature for 48 hours, then placed in a high-temperature furnace, kept at 600°C for 24 hours, and cooled naturally to room temperature to obtain Ca with excellent photocatalytic properties. 2+ Doped TiO 2 nanofiber photocatalyst. figure 1 The Ca prepared in Example 1 is given 2+ Doped TiO 2 Under the condition of 365nm ultraviolet light irradiation for 100 minutes, the nanofiber can almost condense the concentration of 1 × 10 -5 The mol / L rhodamine B aqueous solution was completely degraded, indicating that the obtained catalyst had excellent photocatalytic ...

Embodiment 2

[0016] (1) Add 2 mL of acetic acid and 1 g of polyvinylpyrrolidone to 8 mL of ethanol solution, and form a transparent solution A after stirring;

[0017] (2) Add 1mL of isopropyl titanate and 0.015g of calcium acetate to the solution A prepared in (1); stir evenly to obtain a transparent sol solution B; (3) Electrospin the sol solution B prepared above . The prepared electrospun sample was dried at room temperature for 60 hours, then placed in a high-temperature furnace, kept at 550°C for 30 hours, and cooled naturally to room temperature to obtain Ca with excellent photocatalytic properties. 2+ Doped TiO 2 Nanofiber photocatalysts, followed by photocatalytic experiments.

Embodiment 3

[0019] (1) Add 1.5mL acetic acid and 0.8g polyvinylpyrrolidone to 8.5mL ethanol solution, and form a transparent solution A after stirring;

[0020] (2) Add 2mL of isopropyl titanate and 0.02g of calcium acetate to the solution A prepared in (1); stir evenly to obtain a transparent sol solution B; (3) Electrospin the sol solution B prepared above . The prepared electrospun sample was dried at room temperature for 30 hours, then placed in a high-temperature furnace, kept at 650°C for 20 hours, and cooled naturally to room temperature to obtain Ca with excellent photocatalytic properties. 2+ Doped TiO 2 Nanofiber photocatalysts, followed by photocatalytic experiments.

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Abstract

The invention discloses a preparation method of a calcium-doped titanium dioxide nano fiber photocatalyst. The method comprises the following steps: (1) preparation of solution A: adding certain amounts of acetic acid and polyethylene pyrrolidone into an ethanol solution, and stirring to form a transparent solution A; (2) adding certain amounts of isopropyl titanate and calcium acetate into the solution A prepared in the step (1), and stirring uniformly to obtain a transparent sol solution B; (3) carrying out electrostatic spinning on the sol solution B; and (4) drying the sample prepared in the step (3) at room temperature for 24-96 hours, and calcining in a high-temperature furnace at 450-700 DEG C to obtain the Ca<2+>-doped TiO2 nano fibers. The Ca<2+>-doped TiO2 nano fibers prepared by the method have excellent photocatalytic degradability for organic dyes.

Description

technical field [0001] The invention relates to a preparation method of a calcium-doped titanium dioxide nanofiber photocatalyst, belonging to the technical field of material preparation. Background technique [0002] Since 1972, Fujishima and Honda reported the photoirradiation of titanium dioxide (TiO2) in photovoltaic cells. 2 ) Since the oxidation-reduction reaction of water can take place sustainably and generate hydrogen, relevant TiO 2 The study of semiconductor photocatalysts has become a research hotspot in the field of catalysis. Nano-TiO 2 Because of its low price, non-toxic and pollution-free, high catalytic activity, stable performance and recyclability, it has been widely studied in the field of photocatalysis. But TiO 2 The bandgap width of 3.0-3.2 eV can only be absorbed in the ultraviolet region, and ultraviolet light only accounts for 3%-5% of sunlight, which seriously limits its application in the field of photocatalysis. Therefore, in order to improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/02C02F1/30C02F101/30
CPCC02F1/30B01J23/02C02F2305/10C02F2101/308B01J35/58B01J35/39
Inventor 陈友强张新霓李岷池冯操
Owner QINGDAO UNIV
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