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A ternary z-type composite acoustic catalyst for degrading antibiotic wastewater, its preparation method and application

A technology of antibiotic wastewater and composite sound, which is applied in the field of sound catalysis, can solve problems such as photocatalysis cannot be effectively solved, and achieve the effects of stable properties, broad prospects, and improved efficiency

Active Publication Date: 2021-08-24
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this type of wastewater, photocatalysis cannot effectively solve

Method used

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  • A ternary z-type composite acoustic catalyst for degrading antibiotic wastewater, its preparation method and application
  • A ternary z-type composite acoustic catalyst for degrading antibiotic wastewater, its preparation method and application
  • A ternary z-type composite acoustic catalyst for degrading antibiotic wastewater, its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 A ternary Z-type composite acoustic catalyst KTaO 3 / FeVO 4 / Bi 2 o 3

[0041] (1) Preparation method

[0042] 1. Preparation of KTaO 3 powder

[0043] First, 4.40g of Ta 2 o 5 Add the powder into 30-50mL distilled water, and add KOH aqueous solution (11.20g KOH dissolved in 30mL distilled water) dropwise under magnetic stirring. Next, the resulting mixture was vigorously stirred for 3-6 h to obtain a white precipitate. The white precipitate was then transferred to an autoclave, which was sealed and heated at 180 °C for 24 h. After naturally cooling to room temperature, the resulting product was washed several times with distilled water and ethanol, and centrifuged to obtain a white solid. Dry the white solid at 80°C for 12h, then calcinate at 350°C for 2.0h, and grind to obtain KTaO 3 powder.

[0044] 2. Preparation of FeVO 4 powder

[0045] 8.10g of Fe(NO3 ) 3 9H 2 O was dissolved in 30-50 mL deionized water to form a transparent solution, an...

Embodiment 2 3

[0066] Example 2 Ternary Z-type composite acoustic catalyst KTaO 3 / FeVO 4 / Bi 2 o 3Application in degrading ceftriaxone sodium solution

[0067] (1) Effect of different ultrasonic irradiation time on sonocatalytic degradation

[0068] Experimental method: Take five Erlenmeyer flasks and mark them as (a):US, (b):US / KTaO 3 , (c): US / Bi 2 o 3 ,(d):US / KTaO 3 / Bi 2 o 3 and (e):US / KTaO 3 / FeVO 4 / Bi 2 o 3 , respectively put into 0.1g corresponding catalyst and 100mL 10.0mg / L ceftriaxone sodium aqueous solution in each Erlenmeyer flask. Simply ultrasonically irradiate the US bottle without adding any sonic catalyst. At a temperature of 25-28°C, with 300W, 40KHz ultrasonic irradiation, a certain amount of samples were taken out at 0min, 30min, 60min, 90min, 120min and 150min, and the degradation effect was detected using a UV-visible spectrometer.

[0069] The calculated degradation rate results are as follows Figure 7a shown. As expected, the degradation rates of c...

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Abstract

The invention relates to a ternary Z-type composite acoustic catalyst for degrading antibiotic waste water, a preparation method and application thereof. The present invention utilizes hydrothermal method and precipitation method to synthesize ternary Z-type composite acoustic catalyst, in this Z-type acoustic catalyst, KTaO 3 and Bi 2 o 3 Introduce FeVO in the middle 4 The semiconductor forms a redox reaction center, and the combination of the three finally forms a new composite acoustic catalyst KTaO 3 / FeVO 4 / Bi 2 o 3 . Semiconductor FeVO 4 The addition of forms a cyclic redox recombination center, which promotes the Bi 2 o 3 Electrons in the conduction band and KTaO 3 The recombination and suppression of holes on the valence band in KTaO 3 and Bi 2 o 3 Recombination of individual electron-hole pairs. Synthetic Z-type KTaO 3 / FeVO 4 / Bi 2 o 3 The sonocatalyst was applied in the antibiotic wastewater degrading ceftriaxone sodium, and had high sonocatalytic degradation activity.

Description

technical field [0001] The invention belongs to the field of acoustic catalysis, in particular to the synthesis of a novel acoustic catalyst and its application in degrading antibiotic waste water. Background technique [0002] Since antibiotics were discovered, they have played an important role in human health and animal husbandry production. Among them, ceftriaxone sodium, as a third-generation cephalosporin antibiotic, is widely used clinically because of its strong bactericidal effect. However, the irrational use of ceftriaxone sodium antibiotic has resulted in its large release into the environment. Due to the incomplete treatment of urban industrial wastewater, these drugs are easily found in aquatic and terrestrial ecosystems, severely affect the photosynthesis and metabolism of aquatic plants, enhance the resistance of bacteria, and pose a serious threat to human and ecological health. Therefore, finding an effective and environmentally friendly method for degradi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/847B01J37/03C02F1/36C02F101/34C02F101/38
CPCC02F1/36B01J23/847B01J37/031C02F2101/34C02F2101/38C02F2101/40B01J35/39
Inventor 王君乔静张朝红张洪波李思怡张萌
Owner LIAONING UNIVERSITY
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