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A kind of preparation method of aluminum-titanium-based photocatalytic coagulant and its product and application

A photocatalysis and coagulant technology, which is used in chemical instruments and methods, water treatment parameter control, special compound water treatment, etc. problems, to achieve the effects of a wide range of reagent raw materials, a simple preparation process, and a wide range of pH applications.

Active Publication Date: 2022-05-10
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photogenerated electron-hole pair recombination rate of pure titanium dioxide material is relatively fast, and when it is applied to the treatment of high-concentration organic waste liquid, it shows low catalytic degradation efficiency and requires a long treatment time

Method used

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  • A kind of preparation method of aluminum-titanium-based photocatalytic coagulant and its product and application
  • A kind of preparation method of aluminum-titanium-based photocatalytic coagulant and its product and application
  • A kind of preparation method of aluminum-titanium-based photocatalytic coagulant and its product and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Effect of solid-liquid ratio of aluminum chloride and sodium hydroxide on the performance of the prepared aluminum-titanium-based photocatalytic coagulant

[0028] Weigh sodium hydroxide and dissolve it in water to prepare 0.1M aqueous sodium hydroxide solution. Weigh aluminum chloride, according to solid-liquid ratio 2.5: 100g / mL, 3.5: 100g / mL, 4.5: 100g / mL, 5: 100g / mL, 10: 100g / mL, 15: 100g / mL, 15.5: 100g / mL mL, 16.5:100g / mL, and 17.5:100g / mL were mixed with aluminum chloride and sodium hydroxide aqueous solution, and stirred evenly to obtain nine groups of aluminum chloride precipitation slurries. Weigh titanium powder (titanium powder), mix titanium powder and aluminum chloride precipitation slurry according to the mass ratio of titanium powder and aluminum chloride precipitation slurry of 2.5:100, and stir evenly to obtain nine groups of titanium-doped aluminum chloride precipitation slurry. Nine groups of titanium-doped aluminum chloride precipitation s...

Embodiment 2

[0039] Example 2 Influence of the Mass Ratio of Titanium Powder and Aluminum Chloride Precipitation Slurry on the Performance of the Prepared Aluminum-Titanium-Based Photocatalytic Coagulant

[0040] Weigh sodium hydroxide and dissolve it in water to prepare 0.8M aqueous sodium hydroxide solution. Weigh aluminum chloride, mix aluminum chloride and sodium hydroxide aqueous solution according to the solid-to-liquid ratio of 15:100 g / mL, and stir evenly to obtain aluminum chloride precipitation slurry. Weigh titanium powder (powder titanium), according to the mass ratio of titanium powder and aluminum chloride precipitation slurry: 100, 15:100 were respectively mixed with titanium powder and aluminum chloride precipitation slurry, and stirred evenly to obtain nine groups of titanium-doped aluminum chloride precipitation slurry. Nine groups of titanium-doped aluminum chloride precipitation slurries were irradiated with low-temperature plasma for 4 hours to obtain nine groups of a...

Embodiment 3

[0047] Example 3 Influence of low-temperature plasma action voltage on the performance of the prepared aluminum-titanium-based photocatalytic coagulant

[0048] Weigh sodium hydroxide and dissolve it in water to prepare 1.5M aqueous sodium hydroxide solution. Weigh aluminum chloride, mix aluminum chloride and sodium hydroxide aqueous solution according to the solid-to-liquid ratio of 15:100 g / mL, and stir evenly to obtain aluminum chloride precipitation slurry. Weigh titanium powder (titanium powder), mix titanium powder and aluminum chloride precipitation slurry according to the mass ratio of titanium powder and aluminum chloride precipitation slurry of 12.5:100, and stir evenly to obtain titanium-doped aluminum chloride precipitation slurry. The titanium-doped aluminum chloride precipitation slurry was irradiated with nine groups of low-temperature plasma under different voltages for 6 hours to obtain nine groups of aluminum-titanium-based coagulation slurry, in which the lo...

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Abstract

The invention discloses a preparation method of an aluminum-titanium-based photocatalytic coagulant, which comprises the following steps: mixing aluminum chloride with an aqueous solution of sodium hydroxide and stirring evenly to obtain an aluminum chloride precipitation slurry; combining titanium powder with step one to obtain The aluminum chloride precipitation slurry is mixed and stirred evenly to obtain the titanium-doped aluminum chloride precipitation slurry; the titanium-doped aluminum chloride precipitation slurry is irradiated with low-temperature plasma to obtain an aluminum-titanium-based coagulation slurry; The titanium-based coagulation slurry is dried and ground into powder to obtain aluminum-titanium-based coagulation powder; Step 5, calcining the aluminum-titanium-based coagulation powder at 200-300°C for 2-4 hours to obtain the aluminum-titanium-based photocatalytic hybrid coagulant. The invention also discloses the aluminum-titanium-based photocatalytic coagulant and its application. The invention couples the use of alkali corrosion and low-temperature plasma to convert powdery titanium into high-valent titanium substances. The aluminum-titanium-based photocatalytic coagulant prepared by the invention has a wide range of pH applications, and can achieve the highest 97% COD and 99% chroma removal.

Description

technical field [0001] The invention relates to the fields of wastewater purification and new material research and development, in particular to a preparation method of an aluminum-titanium-based photocatalytic coagulant and its product and application. Background technique [0002] Efficient disposal and reuse of sewage is one of the main ways to solve the contradiction between my country's current limited water resources and the expansion of water demand for economic development. Nowadays, the water treatment process is becoming more and more mature. The coagulation and sedimentation process is usually the pre-operation unit in the field of water treatment. It has the characteristics of simple operation and process construction and remarkable treatment effect. According to the chemical structure, coagulants can be divided into three types: inorganic coagulants, organic coagulants and composite coagulants. [0003] Polyaluminum chloride (PAC) is a widely used inorganic po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/30C02F101/30
CPCC02F1/5245C02F1/30C02F2305/10C02F2101/30C02F2209/08
Inventor 黄涛宋东平杜晶金俊勋刘龙飞周璐璐
Owner CHANGSHU INSTITUTE OF TECHNOLOGY