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A tio for photocatalytic degradation of rhodamine b 2 Photocatalyst and preparation method thereof

A photocatalyst and photocatalytic technology, which is applied in the field of photocatalysis to achieve the effects of improving crystallinity, high utilization rate and improving photocatalytic activity

Active Publication Date: 2022-07-08
LESHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of TiO that photocatalytically degrades rhodamine B 2 Photocatalyst and preparation method thereof to solve the problems of existing photocatalysts

Method used

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  • A tio for photocatalytic degradation of rhodamine b <sub>2</sub> Photocatalyst and preparation method thereof
  • A tio for photocatalytic degradation of rhodamine b <sub>2</sub> Photocatalyst and preparation method thereof
  • A tio for photocatalytic degradation of rhodamine b <sub>2</sub> Photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Photocatalytic degradation of TiO of Rhodamine B in this example 2 The preparation method of photocatalyst includes:

[0032] (1) Mix tetrabutyl titanate and anhydrous ethanol in a volume ratio of 25:30 and add dropwise to the ethanol solution with a concentration of 15% by volume at a rate of 7s / mL. After the dropwise addition was completed, continue stirring for 30 minutes, and then adjust the pH of the system to 8 with ammonia water; the obtained white emulsion was hydrothermally reacted at 130 °C for 5 hours, and the samples were collected and dried at 75 °C for 13 hours. get TiO 2 Precursor;

[0033] (2) The TiO 2 The precursor was ultrasonically dispersed in sodium hydroxide solution, and then hydrothermally reacted at 130 °C for 25 h. The product was washed with distilled water until the solution became neutral, and then the product was acidified in 0.05 mol / L hydrochloric acid solution for 3.5 h, and the sample was collected. and dried at 75 °C for 13 h to o...

Embodiment 2

[0036]Photocatalytic degradation of TiO of Rhodamine B in this example 2 The preparation method of photocatalyst includes:

[0037] (1) Mix tetrabutyl titanate and anhydrous ethanol in a volume ratio of 30:35 and add dropwise to an ethanol solution with a concentration of 30% by volume at a rate of 4s / mL. After the dropwise addition was completed, continue stirring for 45 minutes, and then adjust the pH of the system to 10 with ammonia water; the obtained white emulsion was hydrothermally reacted at 150 °C for 3 hours, and the samples were collected and dried at 85 °C for 11 hours. get TiO 2 Precursor;

[0038] (2) The TiO 2 The precursor was ultrasonically dispersed in sodium hydroxide solution, and then hydrothermally reacted at 150 °C for 23 h. The product was washed with distilled water until the solution became neutral, and then the product was acidified in 0.2 mol / L hydrochloric acid solution for 4.5 h, and the sample was collected. and dried at 85 °C for 11 h to obt...

Embodiment 3

[0041] Photocatalytic degradation of TiO of Rhodamine B in this example 2 The preparation method of photocatalyst includes:

[0042] (1) Mix tetrabutyl titanate and anhydrous ethanol in a volume ratio of 27:33, and then add dropwise to an ethanol solution with a concentration of 21% by volume at a rate of 8s / mL, and stir while adding dropwise. The speed is 1300r / min, and after the dropwise addition is completed, the stirring is continued for 40min, and then the pH value of the system is adjusted to 9 with ammonia water; the obtained white emulsion is hydrothermally reacted at 140°C for 4h, the samples are collected and dried at 80°C for 12h , to get TiO 2 Precursor;

[0043] (2) The TiO 2 The precursor was ultrasonically dispersed in sodium hydroxide solution, and then hydrothermally reacted at 140 °C for 24 h. The product was washed with distilled water until the solution became neutral, and then the product was acidified in 0.1 mol / L hydrochloric acid solution for 4 h. D...

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Abstract

The invention discloses a kind of TiO for photocatalytic degradation of rhodamine B 2 A photocatalyst and a preparation method thereof belong to the technical field of photocatalysis. In the present invention, tetrabutyl titanate and anhydrous ethanol are mixed and then added dropwise to the ethanol solution, and TiO is obtained through the first hydrothermal treatment. 2 precursor; then the TiO 2 The precursor was ultrasonically dispersed in sodium hydroxide solution, and after the second hydrothermal treatment, TiO was obtained 2 catalyst of light. The whole preparation process of the invention is simple, the cost of raw materials is low, it is suitable for large-scale production, and has good economical value. The prepared TiO 2 Photocatalysts have good catalytic effects.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a TiO photocatalytic degradation of Rhodamine B 2 Photocatalyst and preparation method thereof. Background technique [0002] In recent years, the increasingly serious water pollution has led to a serious shortage of water resources in the world, which has aroused widespread concern about water pollution control. Rhodamine B (Rhodamine B), also known as rose red B, or basic rhodamine, commonly known as flower pink, is a synthetic dye with bright pink color. It belongs to triphenylmethane dyes and is widely used in textile, printing, food and chemical industries. Rhodamine B dye wastewater has high chroma and poor biodegradability. If it is directly discharged without treatment, it will cause lasting deterioration of the water environment. Rhodamine B can cause subcutaneous tissue sarcoma, which is suspected to be a carcinogen. [0003] The traditional sewage treatment m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/02B01J37/10C02F1/30C02F101/38B01J35/00
CPCB01J21/063B01J37/10C02F1/30C02F2305/10C02F2101/38B01J35/40B01J35/39Y02W10/37
Inventor 徐要辉蒋强邓迟肖志刚曹凤红陈昶罗旭峰
Owner LESHAN NORMAL UNIV
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