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Nano titanium dioxide photocatalytic degradation agent and preparation method thereof

A nano-titanium dioxide and nano-silicon dioxide technology is applied in the field of nano-titanium dioxide photocatalytic degradation agent and its preparation, which can solve problems such as unsatisfactory degradation effect and water purification effect, achieve mild and easy control of preparation conditions, overcome uneven dispersion, Easy to operate effect

Active Publication Date: 2017-06-13
东北大学秦皇岛分校
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Problems solved by technology

[0004] However, the existing titanium dioxide is used as a photocatalytic degradation agent, and its degradation effect and water purification effect are not ideal.

Method used

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  • Nano titanium dioxide photocatalytic degradation agent and preparation method thereof
  • Nano titanium dioxide photocatalytic degradation agent and preparation method thereof
  • Nano titanium dioxide photocatalytic degradation agent and preparation method thereof

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Embodiment 1

[0038] A preparation method of nano titanium dioxide photocatalytic degradation agent, comprising the following steps:

[0039] S1, preparation of nano-silica modified phenolic resin:

[0040] S1.1. Take 90g of silica sol in a 500ml beaker, add 80mL of absolute ethanol, then stir until a gel is formed, centrifuge to obtain a precipitate, put the precipitate in an oven to dry, and obtain nano-silica;

[0041] S1.2. Put a three-necked flask in a water bath, put 2.8g NaOH, 188g phenol and 10mL water into the three-necked flask, and stir mechanically for 30min at 50°C;

[0042] S1.3. Take 292g of formaldehyde solution with a mass fraction of 37%, put 90g of nano silicon dioxide prepared in S1.1 into it, and stir evenly with magnetic force;

[0043] S1.4. Raise the temperature of the water bath to 60°C, and add the formaldehyde mixture obtained in S1.3 three times every 10 minutes; after adding the formaldehyde mixture, keep the temperature at 60°C and react for 4 hours;

[0044]...

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Abstract

The invention belongs to the technical field of wastewater treatment, and particularly discloses a nano titanium dioxide photocatalytic degradation agent and a preparation method thereof. For the structure of the nano titanium dioxide photocatalytic degradation agent, nano titanium dioxide particles are uniformly distributed in the surfaces of phenolic resin hollow microspheres. The preparation method comprises the following steps that 1, under the alkaline condition, nanosilicon dioxide, phenol and formaldehyde are subjected to condensation polymerization to prepare nanosilicon dioxide modified phenolic resin; 2, the nanosilicon dioxide modified phenolic resin prepared in the step 1 is composited with nano titanium dioxide, after composition is finished, a sodium hydroxide solution is added till silicon dioxide is completely dissolved away, separation and drying are conducted, at last, under the nitrogen atmosphere, sintering is conducted for 12-48 h at 450-550 DEG C, and the nano titanium dioxide photocatalytic degradation agent is obtained. The nano titanium dioxide photocatalytic degradation agent has the good light degradation efficiency, and the preparation method is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a nano-titanium dioxide photocatalytic degradation agent and a preparation method thereof. Background technique [0002] In recent years, the total amount of wastewater discharge in the country has shown a trend of increasing year by year, causing serious damage to the ecological environment and threatening the safety of water for people's survival. In-depth optimization to reduce the COD, BOD and chromaticity value of wastewater will greatly improve the overall situation. [0003] Titanium dioxide, a semiconductor with a wide bandgap, has attracted extensive attention from researchers for its excellent photoelectric, photochemical and other properties, as well as its simple preparation process. Due to its high Fermi energy level, strong oxygen adsorption capacity and hydroxylation, and stable chemical properties, it has photocatalytic oxidation performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C02F1/30
CPCC02F1/30B01J31/38C02F2305/10B01J35/39B01J35/40B01J35/51
Inventor 李轩王海旺李颖魏新芳唐嘉玮杨佩涛靳凯沈鑫圆李秋林
Owner 东北大学秦皇岛分校
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