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Preparation method of titanium dioxide photocatalytic adsorbing material

An adsorption material, a technology of titanium dioxide, applied in the field of photocatalytic composite adsorption materials, can solve the problems of low photon quantum efficiency, catalytic efficiency to be improved, and difficulty in immobilizing catalysts in photocatalytic technology, so as to improve photocatalytic efficiency and photocatalytic oxidation. performance, the effect of inhibiting the recombination of electrons and holes

Active Publication Date: 2016-07-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 Photocatalytic technology has problems such as low photon quantum efficiency, catalytic efficiency needs to be improved, catalysts are difficult to immobilize, and are not easy to recycle.

Method used

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  • Preparation method of titanium dioxide photocatalytic adsorbing material
  • Preparation method of titanium dioxide photocatalytic adsorbing material
  • Preparation method of titanium dioxide photocatalytic adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of titanium dioxide photocatalytic adsorption material of the present invention specifically comprises the following steps:

[0032] Step 1, add 8gTiO 2 Add 300mL distilled water and use 70W ultrasound for 60min to obtain suspension solution A;

[0033] Step 2, add TiO to suspension solution A 2 Mass 0.5% (0.04g) of silver nitrate and 0.005g of citric acid, after stirring for 60min, treated with ultraviolet light (12W, wavelength 254nm) for 120min to obtain mixed suspension solution B;

[0034] Step 3, add 3mL hydrochloric acid and 8g chitosan to the suspension solution B, stir to make it mix uniformly to obtain milky solution C;

[0035] Step 4, using an automatic injector (injection rate is 20ml / h, the needle is 4cm from the liquid level of the sodium hydroxide solution, and the inner diameter of the needle is 0.7mm) drips the milky solution C into sodium hydroxide (0.3mol / L, solution liquid surface height is 15cm) solution, after standing ov...

Embodiment 2

[0037] The preparation method of titanium dioxide photocatalytic adsorption material of the present invention specifically comprises the following steps:

[0038] Step 1, 4gTiO 2 Add 250mL of distilled water and use 70W ultrasound for 90min to obtain suspension solution A;

[0039] Step 2, add TiO to suspension solution A 2 Mass 0.3% (0.012g) of silver nitrate and 0.003g of citric acid, after stirring for 45min, treated with ultraviolet light (16W, wavelength 254nm) for 150min to obtain mixed suspension solution B;

[0040] Step 3, add 3mL hydrochloric acid and 8g chitosan to the suspension solution B, stir to make it mix uniformly to obtain milky solution C;

[0041]Step 4, using an automatic injector (injection rate is 40ml / h, the height of the needle from the liquid level of the sodium hydroxide solution is 3cm, and the inner diameter of the needle is 0.5mm) to drip the milky solution C into sodium hydroxide (0.3mol / L, solution liquid surface height is 15cm) solution, af...

Embodiment 3

[0043] The preparation method of titanium dioxide photocatalytic adsorption material of the present invention specifically comprises the following steps:

[0044] Step 1, 4.5g TiO 2 Add 250mL distilled water and use 70W ultrasound for 120min to obtain suspension solution A;

[0045] Step 2, add TiO to suspension solution A 2 Mass of 0.6% (0.027g) silver nitrate and 0.006g citric acid, after stirring for 30min, treated with ultraviolet light (18W, wavelength 254nm) for 120min to obtain mixed suspension solution B;

[0046] Step 3, add 3mL hydrochloric acid and 9g chitosan to the suspension solution B, stir to make it mix uniformly to obtain milky solution C;

[0047] Step 4, using an automatic injector (injection rate is 50ml / h, the needle is 3cm away from the liquid level of the sodium hydroxide solution, and the inner diameter of the needle is 0.7mm) drips the milky solution C into sodium hydroxide (0.3mol / L, solution liquid surface height is 10cm) solution, after standing...

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Abstract

The invention discloses a preparation method of a titanium dioxide photocatalytic adsorbing material. The titanium dioxide photocatalytic adsorbing material obtained by the preparation method can be used for not only effectively improving the photocatalytic performance of TiO2 and simultaneously solving the problem that the photocatalytic material is difficultly separated and recovered. According to the preparation method disclosed by the invention, a photo-reduction method is firstly adopted for preparing an Ag elementary substance, the Ag elementary substance is loaded on the surface of TiO2 to form an Ag-loaded TiO2 photocatalyst, and then the purpose of inhibiting electron and hole recombination is achieved, so that the photocatalytic efficiency of the catalyst is improved; then the chitosan made of high-molecular materials is adopted as an immobilized base material to immobilize Ag-loaded TiO2; the obtained novel titanium dioxide photocatalytic adsorbing material not only has a good adsorbing effect, but also is easily recovered and separated, can be applied to treatment of emerging pollutants PPCPs; and known from an experimental result, the effect of removing carbamazepine and ibuprofen in PPCPs is good.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide photocatalytic adsorption material, which belongs to the technical field of photocatalytic composite adsorption materials. Background technique [0002] Pharmaceuticals and personal care products (PPCPs) were first proposed in a literature review on pharmaceuticals and personal care products jointly published by Daughton and Ternes in 1999, which discussed the environmental pollution and ecological risks of "PPCPs". Subsequently, "PPCPs" became widely accepted as a proper term for pharmaceuticals and personal care products. In the early 1990s, the annual output of personal care products in Germany reached 550,000 tons, and with the development of the economy and the continuous improvement of the quality of life, the output and consumption of PPCPs are increasing day by day, with more types and more complex structures. . Due to my country's large population and well-developed animal h...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J31/38C02F1/30C02F1/72C02F1/28C02F101/30
CPCB01J20/24C02F1/286C02F1/30C02F1/725B01J31/38C02F2101/30C02F2305/02C02F2305/10B01J35/39
Inventor 冯骞蒋亚东于阳阳钟天意刘晓辉杨雯
Owner HOHAI UNIV
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