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Binary metal oxide composite carbon nitride catalyst, preparation method and applications thereof

A composite carbon nitride and binary metal technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of nitrobenzene and nitrobenzene homologs It can solve the problems of low waste treatment effect and achieve good industrial application prospects, high degradation efficiency and low energy consumption.

Active Publication Date: 2020-02-21
HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, potassium persulfate compound salt has produced hydroxyl radicals (HO·) and sulfate radicals (SO4·-) Advanced oxidation technology has received extensive attention, but systems containing only SO4·— and HO· can only process faster Strong organic compounds, and only rely on SO4·— and HO· for highly nitrated substances Treat nitrobenzene and nitrobenzene Congener treatment effect is low

Method used

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  • Binary metal oxide composite carbon nitride catalyst, preparation method and applications thereof
  • Binary metal oxide composite carbon nitride catalyst, preparation method and applications thereof
  • Binary metal oxide composite carbon nitride catalyst, preparation method and applications thereof

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Embodiment 1

[0043] Embodiment 1 of the present invention: a binary metal oxide composite carbon nitride catalyst, the chemical composition of the catalyst is MnCo 2 o 4 / C 3 N 4 , its preparation steps are as follows:

[0044] (1) At room temperature, weigh 4.35g Co(NO 3 ) 2 ·6H 2 O, 1.23g Mn(CH 3 COO) 2 4H 2 O and 5g DCD were dispersed in 50mL deionized water by ultrasonic, and dissolved completely under magnetic stirring.

[0045] (2) The reaction solution obtained in step (1) was heated to 80° C. under magnetic stirring and kept for 2 hours until the deionized water in the solution system evaporated completely and crystals were precipitated.

[0046] (3) Grind the obtained crystalline substance into powder, dry it in an oven at 120°C for 5h, transfer it to a muffle furnace, and roast it at 575°C for 4h (the muffle furnace heats up to 575°C at a rate of 5°C / min) , thus making MnCo 2 o 4 / C 3 N 4 catalyst. Get the catalyst that above-mentioned embodiment makes and carry ou...

Embodiment 2

[0047] Embodiment 2 of the present invention is: a treatment method for organic waste water, the MnCo prepared in Embodiment 1 2 o 4 / C 3 N 4 Catalyst Activation Peroxymonosulfate (Potassium peroxymonosulfate, PMS) was used for the degradation of organic pollutants in wastewater to evaluate its catalytic activity.

[0048] Accurately take the prepared catalyst 10mg in 50mL concentration of 50mg / L of different waste liquids (bisphenol A (Bisphenol A, BPA), phenol (Phenol), 2,4-dichlorophenol (2,4-Dichlorophenol, 2 , 4-DCP) and nitrobenzene (Nitrobenzene, NB)), under the condition of continuous stirring, 20mg of persulfate was added for degradation reaction. For different pH conditions (pH = 3 ~ 10), the wastewater containing nitrobenzene is adjusted in advance with acid or alkali to simulate different pH environments, and then degraded according to the above process. All the above experiments are carried out at room temperature .

[0049] Take solutions with different reac...

Embodiment 3

[0050] Embodiment three of the present invention is: a treatment method of organic wastewater, the prepared MnCo 2 o 4 / C 3 N 4 Catalyst activation of peroxymonosulfate for the degradation of organic pollutants in petrochemical wastewater to evaluate its practical applicability.

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Abstract

The invention discloses a binary metal oxide composite carbon nitride catalyst, a preparation method and applications thereof, wherein the metal in the binary metal oxide is cobalt and manganese. According to the invention, the catalyst constructed by the scheme can form a reaction system with peroxymonosulfate at a room temperature, can efficiently activate the peroxymonosulfate to generate sulfate radical free radicals, hydroxyl free radicals and high-valence transition metal complexes so as to effectively degrade the organic matters in wastewater, has advantages of high treatment efficiency, strong treatment capacity, strong practical application, easy operation of experimental conditions, wide application to the pH range of water quality, high stability, good reusability and excellenteconomic performance, and has good application prospect in the field of organic wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a binary metal oxide composite carbon nitride catalyst and its preparation method and application. Background technique [0002] With the rapid development of industry, the discharge of organic sewage has increased dramatically. Among them, printing and dyeing wastewater and petrochemical wastewater have become the main sources of organic wastewater due to their large discharge volume and difficult to degrade pollutants, posing a serious threat to the water environment and human health. Therefore, the treatment of organic wastewater is imperative. Among many sewage treatment technologies, advanced oxidation technology is a kind of free radical (HO · and SO 4 ·- ) reacts with organic pollutants such as addition, substitution, electron transfer, and chemical bond cleavage to realize the degradation of pollutants in water. Because of its high degradation efficiency, ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C02F1/72C02F101/30
CPCB01J27/24B01J23/002C02F1/725C02F2101/30B01J35/61
Inventor 黄放袁本琦牛承岗郑超文魏勇红刘利
Owner HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD
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