Sulfur-doped oxygen-vacancy-containing molybdenum trioxide material and method for electrochemical reduction treatment of chloramphenicol

A molybdenum trioxide and sulfur doping technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of hydrogen evolution side reaction, rare environmental pollutants, insufficient electrical conductivity, etc. , to achieve the effect of good conductivity, high reduction activity and wide pH application range

Active Publication Date: 2021-04-30
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Molybdenum trioxide (MoO 3 ) is a layered semiconductor material with a wide range of sources and low price. It has good electrocatalytic reduction performance and has been widely used in the fields of electrochemical hydrogen evolution, supercapacitors, lithium-ion batteries, etc., but in the reduction and removal of environmental pollutants field less common
At present, the application of molybdenum trioxide materials in the field of electrochemistry mainly has the problems of insufficient electrical conductivity and prone to hydrogen evolution side reactions.

Method used

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  • Sulfur-doped oxygen-vacancy-containing molybdenum trioxide material and method for electrochemical reduction treatment of chloramphenicol
  • Sulfur-doped oxygen-vacancy-containing molybdenum trioxide material and method for electrochemical reduction treatment of chloramphenicol
  • Sulfur-doped oxygen-vacancy-containing molybdenum trioxide material and method for electrochemical reduction treatment of chloramphenicol

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) S-MoO 3-xPreparation: Disperse 38.4 mg of molybdenum powder in 48 mL of ethanol, add 6 mL of 30% (mass fraction) hydrogen peroxide solution and stir for 30 minutes, put it into a high-pressure reactor, and react under high temperature and high pressure at 160 ° C for 12 hours, and the obtained material is washed and dried with ethanol Then mix it with sulfur powder at a mass ratio of 1:1, bake at 500°C for 4 hours under a nitrogen atmosphere, and grind to obtain S-MoO 3-x powder.

[0050] (2) Sulfur-doped molybdenum trioxide electrode (S-MoO 3-x / CP) preparation: prepare S-MoO with ethanol and water at a volume ratio of 1:4 3-x The dispersion liquid of the material was evenly dropped on the washed and dried carbon paper (CP), and dried naturally as the cathode material.

[0051] (3) Electrochemical reaction: add sodium dihydrogen phosphate and disodium hydrogen phosphate in the aqueous solution containing chloramphenicol, control reaction solution is neutrality (...

Embodiment 2

[0061] Regulate the pH value of electrolytic solution to be 6.0, and other implementation conditions are with embodiment 1, see in three hours to the removal effect of chloramphenicol Figure 7 , the dechlorination effect within three hours is shown in Table 2.

Embodiment 3

[0063] Regulate the pH value of electrolytic solution to be 9.0, and other implementation conditions are with embodiment 1, see in three hours to the removing effect of chloramphenicol Figure 7 , the dechlorination effect within three hours is shown in Table 2.

[0064] The dechlorination rate of table 2 embodiment 1~3, comparative example 1~2

[0065] implementation plan Chloride ion removal rate% within three hours Example 1 48.8 Comparative example 1 7.4 Comparative example 2 25.6 Example 2 90.9 Example 3 38.9

[0066] Depend on figure 1 , 3, 4, 5 shows that S-MoO 3-x The material has a lamellar structure, rich in oxygen vacancies, and the sulfur element is successfully doped, its crystal phase is changed, and the main crystal plane (210) is retained. Depend on Figure 6 It can be seen that MoO 3-x The activity of catalyzing the reduction of chloramphenicol is significantly higher than that of the blank CP electrode, and 8...

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Abstract

The invention provides a method for electrochemical reduction treatment of chloramphenicol. The method comprises the following steps: S1) preparation of a sulfur-doped oxygen-vacancy-containing molybdenum trioxide material: carrying out high-pressure reaction in an ethanol solvent by using molybdenum powder as a raw material and hydrogen peroxide as an oxidant to synthesize a lamellar oxygen-vacancy-containing molybdenum trioxide material, mixing sulfur powder serving as a sulfur source with the lamellar oxygen-vacancy-containing molybdenum trioxide material, and carrying out high-temperature vapor deposition to obtain S-Mo-O<3-x>; S2) uniformly loading S-Mo-O<3-x> on the surface of carbon paper to obtain a sulfur-doped oxygen-vacancy-containing molybdenum trioxide electrode; and S3) with the sulfur-doped oxygen vacancy-containing molybdenum trioxide electrode as a cathode, carrying out an electrochemical dechlorination reaction in a chloramphenicol-containing electrolyte. The sulfur-doped oxygen-vacancy-containing molybdenum trioxide material is obtained by introducing oxygen vacancy and the sulfur element, so the effects of dechlorination and detoxification are achieved in a short time, and the material is applicable to a wide pH range.

Description

technical field [0001] The invention relates to the technical fields of electrochemical technology and environmental protection wastewater treatment, in particular to a sulfur-doped molybdenum trioxide material containing oxygen vacancies and a method for electrochemical reduction treatment of chloramphenicol. Background technique [0002] Chloramphenicol (CAP) is a broad-spectrum antibiotic, which has been widely used in animal husbandry, aquaculture and food production since the 1950s because of its low cost and good antibacterial and anti-infective effects. Due to its high usage and low absorption rate, large amounts of chloramphenicol are released directly into the environment without being transformed by organisms. However, the accumulation of chloramphenicol in the environment may lead to a significant increase of drug-resistant microorganisms in the natural environment. Studies have shown that chloramphenicol ingested into the human body through food chain enrichment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/30
CPCC02F1/46109C02F2001/46133C02F2101/30
Inventor 陈洁洁程瑞芬俞汉青
Owner UNIV OF SCI & TECH OF CHINA
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