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Photocatalysis material with nano TiO2 loaded on kieselguhr white carbon black used as carrier and preparation method of photocatalysis material

A technology of photocatalytic material and earth white carbon black, which is applied in the field of photocatalytic materials, can solve the problems that the photocatalytic performance needs to be further improved, the titanium dioxide loading is not high, and the preparation cost is high, and achieves small grain size, low cost, and easy operation. simple effect

Inactive Publication Date: 2017-01-25
王秀宝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are some nano-TiO 2 The method of loading on the carrier material, but the preparation cost of these methods is high, the loading capacity of the prepared product titanium dioxide is not high, and the photocatalytic performance needs to be further improved

Method used

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Examples

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Effect test

preparation example Construction

[0021] The above mentioned diatomaceous earth white carbon black as carrier loaded nano TiO 2 The preparation method of photocatalytic material, step is as follows:

[0022] Step 1. Stir and mix water and diatomite silica according to the mass ratio (28-32): 1, and adjust the pH value to 1-2 with hydrochloric acid to obtain a diatomite silica slurry;

[0023] Among them, the concentration of diatomite silica slurry and TiO 2 The load is the same, which is related to product performance and cost; if the mass ratio of water and diatomite silica is less than 28:1, the concentration of diatomite silica slurry increases, and the same TiO 2 In the case of loading, TiO per unit carrier surface 2 Too low, and under the action of electrostatic attraction, the carrier will be agglomerated and the specific surface area will be reduced, which is not conducive to TiO 2 If the mass ratio of water and diatomite silica is greater than 32:1, the concentration of diatomite silica slurry will...

Embodiment 1

[0028] Nano-TiO loaded on diatomite silica as carrier 2 Photocatalytic material with a whiteness of 80, composed of diatomite silica and nano-titanium dioxide supported on diatomite silica; the silica content of diatomite silica is 98.55%, and the particle size is 15 ~40um, loss on ignition is 2.21%, specific surface area is 520m 2 / g, the pore volume is 0.63ml / g; the loading capacity of nano-titanium dioxide is 38%, and the grain size is 12.65nm.

[0029] Nano-TiO loaded on diatomite silica as carrier 2 Preparation method of photocatalytic material:

[0030] Step 1. Stir and mix water and diatomite silica according to a mass ratio of 30:1, and adjust the pH value to 1.5 with hydrochloric acid to obtain a diatomite silica slurry;

[0031] Step 2. When the temperature of diatomite silica slurry drops to -5°C, add titanium tetrachloride solution and ammonium sulfate solution, raise the temperature to 50°C, keep it warm for 1.2h, then add ammonium carbonate solution to adjust ...

Embodiment 2

[0034] Nano-TiO loaded on diatomite silica as carrier2 Photocatalytic material with a whiteness of 84, composed of diatomite silica and nano-titanium dioxide supported on diatomite silica; the silica content of diatomite silica is 98.79%, and the particle size is 15 ~40um, loss on ignition is 2.2%, specific surface area is 516m 2 / g, the pore volume is 0.68ml / g; the loading capacity of nano-titanium dioxide is 40%, and the grain size is 13.2nm.

[0035] Nano-TiO loaded on diatomite silica as carrier 2 Preparation method of photocatalytic material:

[0036] Step 1. Stir and mix water and diatomite silica according to a mass ratio of 28:1, and adjust the pH value to 1 with hydrochloric acid to obtain a diatomite silica slurry;

[0037] Step 2. When the temperature of the diatomite silica slurry drops to -4°C, add titanium tetrachloride solution and ammonium sulfate solution, raise the temperature to 55°C, keep it warm for 1 hour, then add ammonium carbonate solution to adjust ...

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Abstract

The invention provides a photocatalysis material with nano TiO2 loaded on kieselguhr white carbon black used as a carrier and a preparation method of the photocatalysis material, belongs to the technical field of photocatalysis materials, and aims to provide the photocatalysis material with the nano TiO2 loaded on the kieselguhr white carbon black used as the carrier and a preparation method of the photocatalysis material; the photocatalysis material is high in loading capacity, high in whiteness, good in photocatalysis effect and low in cost,. The material provided by the invention has whiteness of 80-85, and consists of the kieselguhr white carbon black and the nano TiO2 loaded on the kieselguhr white carbon black, wherein the content of silicon dioxide in the kieselguhr white carbon black is not less than 98%, the particle size is 15-40 mu m, ignition loss is 2-2.5%, the specific surface area is 490-530m<2> / g, and the pore volume is 0.6-0.7ml / g; the loading capacity of nano TiO2 is 35-40%, and the grain fineness is less than or equal to 15nm. The material is low in cost, large in specific surface area, high in loading capacity of titanium dioxide on the surface, low in grain fineness, excellent in photocatalysis property and good in formaldehyde removal effect.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a nano-TiO with diatomaceous earth white carbon black as a carrier 2 Photocatalytic material and its preparation method. Background technique [0002] Nanoscale titanium dioxide refers to titanium dioxide (TiO2) with a diameter of less than 100 nanometers. 2 ). Nano-TiO 2 Not only has very valuable optical properties, but also has high chemical stability, thermal stability, non-toxicity, superhydrophilicity, non-migratory, and can be in contact with food, so it is widely used in anti-ultraviolet materials, textiles , photocatalytic catalyst, self-cleaning glass, sunscreen, paint, ink, food packaging materials, paper industry, aerospace industry, lithium battery and other fields. However, in practical applications, pure nano-TiO 2 It has the disadvantages of easy agglomeration, difficulty in recycling, and low utilization rate of natural light. N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/08
CPCB01J21/08B01J35/39
Inventor 王秀宝
Owner 王秀宝
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