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Perovskite material with excessive A site, preparation method and application of perovskite material in catalytic treatment of organic wastewater

A technology of perovskite materials and perovskite oxides, applied in water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as shortage, achieve high reactivity, promote Effect of lattice oxygen transfer

Active Publication Date: 2021-08-10
NANJING UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there is still a lack of catalyst systems that can effectively activate potassium persulfate (PMS)

Method used

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  • Perovskite material with excessive A site, preparation method and application of perovskite material in catalytic treatment of organic wastewater
  • Perovskite material with excessive A site, preparation method and application of perovskite material in catalytic treatment of organic wastewater
  • Perovskite material with excessive A site, preparation method and application of perovskite material in catalytic treatment of organic wastewater

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Embodiment Construction

[0037] Synthesis of LNO Perovskite Catalytic Materials

[0038] La 1+x NiO 3-δ (x=0, 0.1, 0.15, 0.2) were prepared by the sol-gel method. The specific method is: the stoichiometric La(NO 3 ) 3 •6H 2 O and Ni(NO 3 ) 2 •6H 2 O was dissolved in deionized water, and then ammonia solution of EDTA and citric acid were added to deionized water as a complexing agent to form a transparent nitrate solution, wherein the molar ratio of EDTA:citric acid:total metal ions was 1:2: 1, while adding NH 3 ·H 2 O was added dropwise to the resulting solution to adjust the pH. The solution was then heated with vigorous stirring to evaporate the water and form a gel. The concentrated gel was dried in an oven at 18 °C in air for 6 h to obtain the perovskite precursor, which was then heated at 800 °C for 5 °C min -1 Calcined at a heating rate of 300 minutes to obtain a perovskite material.

[0039] Characterization method

[0040] Determination of non-stoichiometric oxygen ratios at the ...

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Abstract

The invention relates to a perovskite material with an excessive A site, a preparation method and application of the perovskite material in catalytic treatment of organic wastewater, and belongs to the technical field of perovskite oxide catalytic materials and application. The perovskite oxide La<1 + x>NiO<3-delta> with excessive A site has higher material surface oxygen vacancy, and shows higher catalytic activity and organic wastewater degradation efficiency.

Description

technical field [0001] The invention relates to a perovskite material with excess A sites, a preparation method and its use in catalytic treatment of organic wastewater, and belongs to the technical field of perovskite oxide catalytic materials and applications. Background technique [0002] Advanced oxidation processes (AOPs) have played an important role in the field of wastewater remediation, especially in the removal of stubborn organics in harsh aqueous environments. Organic matter is oxidized by reactive oxygen species (ROS) with a high redox potential and decomposed into H 2 O and CO 2 , such as hydroxyl ( • OH,E 0 = 1.9-2.7 eV), sulfate (SO4 •- ,E 0 = 2.5-3.1 eV) and singlet oxygen ( 1 o 2 , E0 = 2.2 eV). Owing to the asymmetric structure of potassium peroxymonosulfate (PMS), SO can be efficiently generated by cleavage of O–O bonds in catalyst-activated PMS. 4 •- and •OH radicals. However, free radicals are unstable in complex aqueous environments, such...

Claims

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Application Information

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IPC IPC(8): B01J23/83C02F1/72C02F101/30
CPCB01J23/83C02F1/725C02F1/722C02F2101/30Y02W10/37
Inventor 周嵬马雪邵宗平曹伟王文辉
Owner NANJING UNIV OF TECH
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