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A hollow boron glass microsphere@tio 2 Catalyst preparation method and its use

A boron glass and catalyst technology, applied in the field of inorganic catalysis, can solve problems affecting water quality and achieve good catalytic activity and stability

Active Publication Date: 2021-11-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lethal dose of free ammonia to fish is only 1mg / L, and nitrate is oxidized to nitrite under the action of nitrifying bacteria. Oxidation of 1mg / L ammonia nitrogen requires 4.6mg / L dissolved oxygen, which affects the quality of water

Method used

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  • A hollow boron glass microsphere@tio <sub>2</sub> Catalyst preparation method and its use
  • A hollow boron glass microsphere@tio <sub>2</sub> Catalyst preparation method and its use
  • A hollow boron glass microsphere@tio <sub>2</sub> Catalyst preparation method and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 5g NaOH and dissolve it in 95mL distilled water to prepare a 5% NaOH solution with a mass fraction of 5%. Measure 300mL of a 37% concentrated hydrochloric acid solution and dissolve it in 700mL distilled water to prepare a 3mol / L dilute hydrochloric acid with a mass fraction of 165mL TiCl 4 Slowly add the pure solution to 500mL of dilute hydrochloric acid, stirring continuously during the dropwise addition, then add dilute hydrochloric acid to 1 L, and make 1.5mol / L of TiCl 4 Hydrochloric acid solution;

[0026] Weigh 100g of hollow boron glass microspheres and 500mL of distilled water into a 2L beaker, then add 5% NaOH solution and 1.5mol / L TiCl at the same time while heating and stirring in a water bath at 85°C 4 84mL of hydrochloric acid solution, control the pH of the solution to 2, and control the addition time to about half an hour; after the addition is complete, react for another 3h; after the reaction is completed, use deionized water to filter until neu...

Embodiment 2

[0032] Same as Example 1, but change the initial concentration of the ammonia solution, weigh 0.111g and 0.037g of ammonia respectively to make the initial concentration of the ammonia solution 30mg / L and 10mg / L respectively, and see Table 2 for the obtained results of the conversion rate after 11 hours of reaction.

[0033] Table 2.TiO 2 Hollow boron glass microspheres@TiO with 10% loading 2 Conversion rate result table of photocatalytic degradation of ammonia solution

[0034]

[0035]

Embodiment 3

[0037] With embodiment 1, change TiCl in the specific embodiment 4 The amount of the solution added was 42 mL, and the catalyst content was prepared at 5%.

[0038] Table 3.TiO 2 Hollow boron glass microspheres@TiO with a loading of 5% 2 Conversion rate result table of photocatalytic degradation of ammonia solution

[0039]

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Abstract

The invention belongs to the field of inorganic catalysis and provides a hollow boron glass microsphere @TiO 2 Catalyst preparation method and its use. The preparation steps are as follows: Add deionized water and hollow boron glass microspheres into the beaker under the condition of heating and stirring in a water bath at 85 °C, and at the same time add a certain amount of NaOH solution and TiCl 4 Hydrochloric acid solution, adjust pH = 2, react for 3 hours, wash with deionized water after the reaction is complete, dry the sample in a drying oven, and make hollow boron glass microspheres @TiO 2 Core-shell structured photocatalysts. The catalyst is used for photocatalytic degradation of ammonia in water under visible light conditions. The remarkable feature of the present invention is that the hollow boron glass microspheres @TiO 2 The catalyst has high activity for photocatalytic degradation of ammonia.

Description

technical field [0001] The invention belongs to the field of inorganic catalysis and relates to a hollow boron glass microsphere@TiO 2 The preparation method of the catalyst and the application of catalytic degradation of ammonia under the irradiation of visible light. Background technique [0002] With the progress and development of human beings, environmental pollution is becoming more and more serious, and the removal of harmful substances in water bodies has become an important issue in the field of environmental science. [0003] Common types of inorganic pollutants in water are ammonia nitrogen, nitrogen oxide compounds and cyanide ions. In 2015, my country clearly stipulated that the direct discharge of ammonia nitrogen in water pollution should not exceed 10mg / L. Ammonia nitrogen in water mainly comes from domestic sewage, industrial wastewater, etc. Excessive ammonia compounds will deteriorate the quality of water and cause great harm to fish, plants, and human b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/08B01J37/03C02F1/30C02F101/16
CPCC02F1/30B01J21/063B01J37/033C02F2101/16C02F2305/10B01J35/39B01J35/51
Inventor 周芹殷恒波
Owner JIANGSU UNIV