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Preparation method and using method of graded hole TiO2 ceramic photocatalyst

A photocatalyst and graded pore technology, used in ceramic products, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problems of inability to prepare and long time for the degradation of organic pollutants, and achieve the effect of shortening the degradation time.

Inactive Publication Date: 2014-02-05
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that existing methods cannot prepare TiO that can remove organic pollutants in sewage within 4h to 6h. 2 Ceramic photocatalysts, and the use of existing TiO 2 The use of ceramic photocatalysts to remove organic pollutants in sewage has the problem of a long degradation process, and a hierarchical pore TiO 2 Preparation method and application method of ceramic photocatalyst

Method used

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  • Preparation method and using method of graded hole TiO2 ceramic photocatalyst
  • Preparation method and using method of graded hole TiO2 ceramic photocatalyst
  • Preparation method and using method of graded hole TiO2 ceramic photocatalyst

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specific Embodiment approach 1

[0015] Specific implementation mode 1: In this implementation mode, a graded hole TiO 2 The preparation method of ceramic photocatalyst is carried out in the following steps:

[0016] 1. Mixing of reagents: Weigh 20 to 50 parts of high thermal stability mesoporous TiO according to the ratio of parts by mass 2 Powder material, 100-150 parts of deionized water, 10-15 parts of foaming agent, 2-5 parts of dispersant and 2-5 parts of binder, and then stir and mix the above-mentioned weighed reagents for 5-15 minutes to obtain Mixed reagent; 2. Ball milling: ball mill the mixed reagent prepared in step 1 at a temperature of 40°C to 80°C, and the ball milling time is 24h to 48h to obtain a slurry; 3. Injection molding: mix the slurry prepared in step 2 Put into the closed mold and place it in a constant temperature water bath at 80°C to 100°C for 1h to 2h to obtain the formed slurry; 4. Demoulding: separate the formed slurry obtained in step 3 from the mold to obtain the green body;...

specific Embodiment approach 2

[0019] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the high thermal stability mesoporous TiO described in step one 2 The preparation method of powder material is carried out as follows: one, TiO 2 Preparation of sol: add 10mL of absolute ethanol to 10mL of tetrabutyl titanate and stir for 1h to form A solution; dissolve 0.5g of ammonium phosphate in 15mL of distilled water, add 30mL of absolute ethanol, add 3mL of nitric acid and stir for 30min to form B solution, and dissolve B The solution was dropped into solution A, stirred for 1 h, and heated in water at 160°C for 6 h. 2. SiO2 2 Preparation of sol: Dissolve 1g of P123 in 25g of distilled water, add 2g of hydrochloric acid, stir for 30min, then add 2.4g of tetraethyl orthosilicate, stir for 12h, then heat at 100°C for 12h. TiO obtained in step 1 2 Sol and SiO obtained in step 2 2 After the sol was mixed and stirred for 2 hours, it was dried in a drying oven at 60°C, t...

specific Embodiment approach 3

[0020] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 2, the reagents weighed above are stirred and mixed for 8 minutes. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method and a using method of a graded hole TiO2 ceramic photocatalyst, and relates to a preparation method and a using method of a photocatalyst. Problems to be solved in the invention are that the TiO2 ceramic photocatalyst capable of removing organic pollutants in wastewater cannot be prepared within 4 hours-6 hours in the existing method, and time for degrading organic pollutants in the wastewater by using the existing TiO2 ceramic photocatalyst is long. The preparation method comprises the following steps of: roasting powder materials, deionized water, a foaming agent, a dispersing agent and a binding agent after mixing, ball-milling, injection-molding and drying to obtain the graded hole TiO2 ceramic photocatalyst. The using method comprises the following step of: adding the graded hole TiO2 ceramic photocatalyst in the wastewater to irradiate under ultraviolet light. The prepared graded hole TiO2 ceramic photocatalyst has characteristic of being short in time of degrading pollutants in the water. The graded hole TiO2 ceramic photocatalyst is used as the photocatalyst for removing the organic pollutants in the wastewater.

Description

technical field [0001] The invention relates to a method for preparing and using a photocatalyst. Background technique [0002] The rapid development of modern industry and agriculture, the extensive use of pesticides, chemical dyes, oil, etc., have made environmental pollution more and more serious, such as oil tanker leaks, random discharge of chemical dyes, and random use of pesticides that have occurred in recent years. In solving the problem of water pollution, semiconductor photocatalysis has been developed in recent years, and its degradation of organic and inorganic water pollutants is a very promising technology. Among many semiconductor photocatalysts, TiO 2 It has been valued due to its good chemical stability, high photocatalytic activity, low cost, resistance to photochemical corrosion, and non-toxicity. TiO 2 It has great advantages in water treatment, but it also has disadvantages: powder TiO 2 Recycling problem, the powder TiO added in the process of wast...

Claims

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Application Information

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IPC IPC(8): C04B35/46C04B35/622C04B38/06B01J21/06
Inventor 邢子鹏杜帆周卫于秀娟漆胜群
Owner HEILONGJIANG UNIV
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