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Photocatalyst-loaded supercritical foaming material and preparation method thereof

A technology of foaming materials and photocatalysts, applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems that catalysts are not easy to disperse, difficult to recycle, and easy to poison catalysts, so as to reduce the risk of easy falling off , prolong the service life, the effect of large specific surface area

Pending Publication Date: 2021-03-19
南京国兴环保产业研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, it is found that the suspension system is difficult to recycle due to the extremely small particles of nano-TiO2, the catalyst is easily poisoned, and the catalyst is not easily dispersed when there are high-valent cations in the solution.

Method used

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  • Photocatalyst-loaded supercritical foaming material and preparation method thereof
  • Photocatalyst-loaded supercritical foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The supercritical foaming material loaded with photocatalyst comprises the following components by mass: 20 parts of Portland cement, 4 parts of masterbatch, 15 parts of calcium sulfate nano whiskers, 5 parts of calcium silicate hydrate, 30 parts of water part, 1 part of reinforcing agent, nano-Al 2 0 3 4 parts, Nano B 2 0 3 5 parts, Nano K 2 01 parts, 4 parts of nano MgO, 4 parts of nano CaO, 1 part of nano ZnO, nano SiO 2 1 part, nano TiO 2 60 parts of photocatalyst.

[0024] The preparation method of the supercritical foaming material of described load photocatalyst comprises the steps:

[0025] Step 1: Mix 20 parts of ordinary Portland cement, 4 parts of masterbatch, 15 parts of calcium sulfate nano-whiskers, 5 parts of calcium silicate hydrate, 30 parts of water, and 1 part of reinforcing agent, and encapsulate them in the In the mold; calcium sulfate nanocrystals are used to improve the toughness and strength of the material; calcium silicate hydrate as an ...

Embodiment 2

[0033] The supercritical foaming material loaded with photocatalyst comprises the following components by mass: 30 parts of salt cement, 5 parts of masterbatch, 18 parts of calcium sulfate nano whiskers, 10 parts of calcium silicate hydrate, 35 parts of water, Strengthening agent 2 parts, nano-Al 2 0 3 5 parts, Nano B 2 0 3 10 parts, Nano K 2 02 parts, nano-MgO 5 parts, nano-CaO5 parts, nano-ZnO3 parts, nano-SiO 2 5 parts, Nano TiO 2 65 parts of photocatalyst.

[0034] The preparation method of the supercritical foaming material of described load photocatalyst comprises the steps:

[0035] Step 1: Mix 25 parts of ordinary Portland cement, 5 parts of masterbatch, 18 parts of calcium sulfate nano-whiskers, 10 parts of calcium silicate hydrate, 35 parts of water, and 2 parts of reinforcing agent. In the mold; calcium sulfate nanocrystals are used to improve the toughness and strength of the material; calcium silicate hydrate as an accelerator can shorten the nucleation pro...

Embodiment 3

[0043] The supercritical foaming material loaded with photocatalyst comprises the following components by mass: 40 parts of salt cement, 6 parts of masterbatch, 20 parts of calcium sulfate nano whiskers, 15 parts of calcium silicate hydrate, 40 parts of water, Strengthening agent 3 parts, nano-Al 2 0 3 6 parts, Nano B 2 0 3 15 parts, Nano K 2 03 parts, 6 parts of nano MgO, 6 parts of nano CaO, 5 parts of nano ZnO, nano SiO 2 10 parts, Nano TiO 2 70 parts of photocatalyst.

[0044] The preparation method of the supercritical foaming material of described load photocatalyst comprises the steps:

[0045] Step 1: Mix 40 parts of ordinary Portland cement, 6 parts of masterbatch, 20 parts of calcium sulfate nano-whiskers, 15 parts of calcium silicate hydrate, 40 parts of water, and 3 parts of reinforcing agent. In the mold; calcium sulfate nanocrystals are used to improve the toughness and strength of the material; calcium silicate hydrate as an accelerator can shorten the nu...

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Abstract

The invention discloses a photocatalyst-loaded supercritical foaming material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing Portland cement,master batch, calcium sulfate nanowhiskers, hydrated calcium silicate, water and a reinforcing agent, and packaging an obtained mixture in a mold after machine-made molding, using CO2 as a foaming agent to obtain a foaming material with an ultra-fine micropore structure, coating the surface of a foaming base material with a metal oxide nano material and a nano TiO2 photocatalyst, carrying out high-temperature curing treatment on the foaming base material to form the novel composite photocatalytic supercritical foaming material, and finally testing the degradation rate. The foaming material with the ultrafine micropore structure is prepared through a supercritical fluid foaming technology, and the foaming material has extremely large specific surface area and excellent durability.

Description

【Technical field】 [0001] The invention relates to the technical field of preparation of supercritical foaming materials, in particular to a photocatalyst-loaded supercritical foaming material and a preparation method thereof. 【Background technique】 [0002] Since Japan's Fujishima and Honda discovered TiO2 single-crystal electrodes to photolyze water in 1972, the research on nano-semiconductor heterogeneous photocatalytic reactions has been carried out more and more deeply. Semiconductors with heterogeneous photocatalytic properties include WO3, TiO2, CdS, ZnS, ZnO, Fe2O3, CdSe, etc. Among them, TiO2 is the most popular due to its chemical and photocorrosion resistance, stable properties, non-toxicity, high catalytic activity, and low price. Pay attention to and have the broadest application prospects. So far, nano-TiO2 photocatalysts are mainly used in the fields of wastewater treatment and air purification. It is mainly carried out in two forms when used: one is to mix n...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J32/00B01J35/10
CPCB01J23/06B01J35/33B01J35/61B01J35/39
Inventor 丁士明黄敏
Owner 南京国兴环保产业研究院有限公司
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