Nano titanium dioxide (TiO2)/ montmorillonite composite photocatalysis water treatment material and preparation method thereof

A technology of composite photocatalysis and montmorillonite, applied in the direction of light water/sewage treatment, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult recycling and easy reunion, and achieve easy recycling, reduce reunion, The effect of simple process

Active Publication Date: 2013-07-24
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The material can overcome nano TiO 2 The particles are easy to agglomerate and difficult to recycle when used in liquid phase alone, and effectively improve their photocatalytic degra

Method used

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  • Nano titanium dioxide (TiO2)/ montmorillonite composite photocatalysis water treatment material and preparation method thereof
  • Nano titanium dioxide (TiO2)/ montmorillonite composite photocatalysis water treatment material and preparation method thereof
  • Nano titanium dioxide (TiO2)/ montmorillonite composite photocatalysis water treatment material and preparation method thereof

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preparation example Construction

[0046] The invention provides a nano TiO 2 The preparation method of / montmorillonite composite photocatalytic water treatment material comprises the following steps:

[0047] 1) Weigh 40-98% nano-TiO according to weight percentage 2 and 2~60% montmorillonite, mixed evenly, nano-TiO 2 The particle size is 10~30nm, nano TiO 2 The mass ratio of anatase phase and rutile phase is about 80 / 20; the size of montmorillonite is 12~35μm.

[0048] 2) Mix the nano-TiO homogeneously in step 1) 2 and montmorillonite are placed in absolute ethanol to obtain a slurry;

[0049] 3) The slurry in step 2) is ultrasonically dispersed, and then put into a ball mill for mechanical ball milling to obtain a mixture; the ultrasonic working frequency is 30~50kHz, and the processing time is 10~20min; when the slurry is placed in a ball mill for mechanical ball milling, the ball material Mass ratio=5︰1, ball milling speed is 200~300 rpm, ball milling time is 0.5~3h.

[0050] 4) The mixture is complet...

Embodiment 1

[0053] Weigh 1.6g of industrial finished product German P25 type nano TiO according to weight percentage 2 And 2.4g of montmorillonite, mix well, wherein, nano-TiO 2 The particle size is 20nm, nano TiO 2 The mass ratio of the anatase phase and the rutile phase is about 80 / 20; the size of the montmorillonite is 20 μm. The mixed nano-TiO 2 and montmorillonite in 100ml of absolute ethanol to obtain a slurry; the slurry was ultrasonically dispersed at a frequency of 40kHz for 15min, then put into a ball mill, and mechanically milled for 2h at a milling speed of 250 rpm to obtain a mixture. Ratio=5:1. The anhydrous ethanol contained in the mixture was volatilized at a constant temperature of 105°C until it was completely dry; after heat treatment at 400°C in a muffle furnace for 5 hours, it was cooled to room temperature and taken out, and finally ground to a uniform size of 1000 mesh to obtain a water-treated material.

Embodiment 2

[0055] Weigh 2.4g of industrial finished product German P25 type nano TiO according to weight percentage 2 and 0.6g of montmorillonite, mix evenly, wherein, nano-TiO 2 The particle size is 10nm, nano TiO 2 The mass ratio of the anatase phase and the rutile phase is about 80 / 20; the size of the montmorillonite is 35 μm. The mixed nano-TiO 2 and montmorillonite in 100ml of absolute ethanol to obtain a slurry; the slurry was ultrasonically dispersed at a frequency of 40kHz for 10min, then put into a ball mill, and mechanically milled for 1h at a milling speed of 200 rpm to obtain a mixture. Ratio=5:1. The absolute ethanol contained in the mixture was volatilized at a constant temperature of 105°C until it was completely dry; after heat treatment at 300°C in a muffle furnace for 5 hours, it was cooled to room temperature and taken out, and finally ground to a uniform size of 1000 mesh to obtain a water-treated material.

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Abstract

The invention discloses a nano titanium dioxide (TiO2)/montmorillonite composite photocatalysis water treatment material and a preparation method thereof. The material consists of the following raw materials by weight percent: 40 to 98 percent of nano TiO2 and 2 to 60 percent of montmorillonite, wherein the nano TiO2 is loaded on the montmorillonite. The preparation method comprises the following steps of measuring the nano TiO2 and the montmorillonite, uniformly mixing the nano TiO2 and the montmorillonite, and placing the mixture into absolute ethyl alcohol to obtain pulp; dispersing the pulp through ultrasonic, then placing the pulp into a ball milling machine to be mechanically ball milled to obtain a mixture; completely drying the mixture at a constant temperature; carrying out the heat treatment again on the mixture, then cooling the mixture to the room temperature, and taking out the mixture to be uniformly ground to obtain the water treatment material. The nano TiO2 is fixedly loaded on the natural mineral montmorillonite through a simple and environment-friendly solid phase dispersion method, so that the composite material has the characteristics of easy dispersion and convenience in recycling when the composite material is used in a liquid phase, the photocatalysis degrading capacity of the composite material in the range between the ultraviolet and the visible light can be improved, and the original characteristic of the montmorillonite for purifying the water also can be realized.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a nano-TiO 2 / Montmorillonite composite photocatalytic water treatment material and preparation method thereof. Background technique [0002] According to the research results of relevant experts, the economic loss caused by water pollution in my country accounts for 1.5~2.8% of GDP, and water resource pollution has become an urgent problem to be solved in our country. The presence of pollutants in water, especially organic pollutants, not only causes environmental pollution and ecological damage, but also seriously endangers human health. These organic pollutants include polycyclic aromatic hydrocarbons, polychlorinated biphenyls, pesticides, environmental interferons, dyes, etc. Some of them have extremely stable chemical properties and are difficult to treat with traditional physical, chemical and biological methods. Compared with the traditional organic wastewater decontamina...

Claims

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Application Information

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IPC IPC(8): B01J21/16C02F1/30C02F1/32
Inventor 廖灵敏汪在芹李珍魏涛陈亮梁慧肖承京冯菁邵晓妹李晓鄂李鹏翔张健闫小虎
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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