Kieselguhr-based porous ceramics and method for loading Ag doped with nano TiO2 on same

A technology of nano-titanium dioxide and diatomite, which is applied in the direction of ceramic products, other household appliances, household appliances, etc., can solve the problems of affecting the photocatalyst effect, high production cost, and difficult to load evenly, and achieves small pore size, low cost, and light The effect of improving the catalytic activity

Inactive Publication Date: 2010-11-24
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the one hand, zeolite molecular sieve, activated carbon, etc. are used as carrier materials, and the production cost is relatively high. Although the production cost of natural zeolite, bentonite, sepiolite, glass, etc. Most of them are covered and have poor light transmission, which affects the effect of photocatalysts; on the other hand, the production costs of sol-gel and vapor deposition methods are high, and it is difficult to obtain uniform loading and high catalytic activity by impregnation methods and mixed preparation methods. Nano TiO 2

Method used

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  • Kieselguhr-based porous ceramics and method for loading Ag doped with nano TiO2 on same
  • Kieselguhr-based porous ceramics and method for loading Ag doped with nano TiO2 on same
  • Kieselguhr-based porous ceramics and method for loading Ag doped with nano TiO2 on same

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Embodiment 1

[0024] Diatomite-based porous ceramics are made of the following raw materials: 850g diatomite, 100g kaolin, 50g quartz, 10g sodium polyacrylate, 5g polyvinyl alcohol, and 3500g water.

[0025] When preparing, take each raw material according to the above ratio, mix and dissolve each raw material, add it into the grinder and grind until D 50 =2μm, dried at 110°C for 3h, dispersed, molded under a pressure of 35MPa, and calcined at 950°C for 2h to obtain diatomite-based porous ceramics. figure 1 It shows that the pore size distribution of the prepared diatomite-based porous ceramics is 100-350 nm, and the pore size is fine and uniform.

[0026] The method of diatomite-based porous ceramics loaded with silver-doped nano-titanium dioxide, the raw materials used are diatomite-based porous ceramics, Ti(SO 4 ) 2 , polyethylene glycol, HCl and AgNO 3 The mass ratio of the diatomite-based porous ceramics is 100:1:0.003:0.5:0.2, and the preparation includes the following steps: (1) u...

Embodiment 2

[0028] Diatomite-based porous ceramics are made of the following raw materials: 920 g of diatomite, 80 g of kaolin, 20 g of sodium polyacrylate, 10 g of polyvinyl alcohol, and 4500 g of water.

[0029] When preparing, take each raw material according to the above ratio, mix and dissolve each raw material, add it into the grinder and grind until D 50 =5 μm, dried at 110°C for 3 hours, dispersed, molded under a pressure of 35 MPa, and calcined at 980°C for 3 hours to obtain diatomite-based porous ceramics.

[0030] The method of diatomite-based porous ceramics loaded with silver-doped nano-titanium dioxide, the raw materials used are diatomite-based porous ceramics, Ti(SO 4 ) 2 , polyethylene glycol, HCl and AgNO 3 The mass ratio of the diatomite-based porous ceramics is 100:15:0.5:2:1; the preparation includes the following steps: (1) ultrasonically cleaning the diatomite-based porous ceramics in distilled water and absolute ethanol successively, and drying; (2) drying the P...

Embodiment 3

[0032] Diatomite-based porous ceramics are made of the following raw materials: 600g of diatomite, 200g of kaolin, 120g of feldspar, 80g of calcium carbonate, 0.1g of sodium polyacrylate, 0.01g of polyvinyl alcohol, and 2000g of water.

[0033] When preparing, take each raw material according to the above ratio, mix and dissolve each raw material, add it into the grinder and grind until D 50 =6 μm, dried at 110°C for 3 hours, dispersed, molded under a pressure of 35 MPa, and calcined at 960°C for 4 hours to obtain diatomite-based porous ceramics.

[0034] The method of diatomite-based porous ceramics loaded with silver-doped nano-titanium dioxide, the raw materials used are diatomite-based porous ceramics, Ti(SO 4 ) 2 , polyethylene glycol, HCl and AgNO 3 The mass ratio of the diatomite-based porous ceramics is 100:30:1:4:2; the preparation includes the following steps: (1) ultrasonically cleaning the diatomite-based porous ceramics in distilled water and absolute ethanol su...

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Abstract

The invention relates to a kieselguhr-based porous ceramics, a preparation method thereof and a method for loading Ag doped with nano TiO2 on the same, belonging to the technical field of a kieselguhr inorganic material. The kieselguhr-based porous ceramics is made from kieselguhr, a sintering auxiliary agent, a dispersing agent, a binder and water in the weight ratio of 60-92:8-40:0.01-2:0:001-1:100-450. The kieselguhr-based porous ceramics has functions of absorption and filtration, and can absorb granules in fluid when the fluid passes through the lieselguhr-based porous ceramics. Ag doped with nano TiO2 is loaded on the kieselguhr-based porous ceramics to generate kieselguhr-based porous ceramics loading the Ag doped with TiO2. The laden anatase-type nano TiO2 has large specific surface area. The effects of filtration, photochemical catalysis and sterilization of the kieselguhr-based porous ceramics loading the Ag doped with nano TiO2 are greatly increased.

Description

technical field [0001] The invention belongs to the technical field of diatomite inorganic materials, and relates to a diatomite-based porous ceramic and a preparation method thereof, as well as a method for loading silver-doped nano-titanium dioxide on a diatomite-based porous ceramic. Background technique [0002] With the development of industrialization and urbanization, environmental pollution around the world is becoming more and more serious, especially the pollution of indoor air is worrying. Various organic decoration and decoration materials, furniture, modern office appliances and household appliances, etc., continuously release pathogenic and carcinogenic substances such as formaldehyde, benzene, benzopyrene and ammonia. According to tests, the degree of indoor air pollution is 5 times that of outdoor air. ~20 times, while urban residents spend more than 90% of their time indoors. Therefore, people's health and even life have been endangered unprecedentedly, lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/14C04B41/85
Inventor 高如琴郑水林
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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