Perovskite catalytic persulfate, and preparation method and application thereof

A technology of persulfate and perovskite, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of low self-use rate of rare earths, and achieve the effect of ensuring water quality safety and improving water quality

Active Publication Date: 2016-10-26
XI AN JIAOTONG UNIV
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Problems solved by technology

my country's rare earth reserves and output both rank first in the world, but the rare earth self-use rate is low

Method used

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  • Perovskite catalytic persulfate, and preparation method and application thereof
  • Perovskite catalytic persulfate, and preparation method and application thereof
  • Perovskite catalytic persulfate, and preparation method and application thereof

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Embodiment Construction

[0024] The present invention is described in further detail below in conjunction with accompanying drawing:

[0025] The preparation method of perovskite catalyzed persulfate of the present invention comprises the following steps: (1) according to the molar ratio, be La:Co:CA=1:1:2 and take appropriate amount of La (NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O and C 6 h 8 o 7 ·H 2 O, add a small amount of water to dissolve, and stir at room temperature for 12 hours; (2) place the prepared precursor solution in a water bath heating pot at 80°C for 12 hours to make it completely gel; (3) at 80°C Place it in a vacuum drying oven for 12 hours to dry it; (4) raise the temperature of the muffle furnace to 500°C at a rate of 5°C / min, and calcinate for 3h to obtain the catalyst LaFeO 3 ; (5) the calcined LaFeO 3 The powder is ground to uniform fine particles for later use.

[0026] Catalyzed persulfate salt water treatment method of the present invention: the LaFeO of gained 3 The...

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Abstract

The invention discloses a preparation method of perovskite catalytic persulfate. The method comprises the following steps that (1) La(NO3)3 6H2O, Fe(NO3)3 9H2O and C6H8O7 H2O are respectively weighed according to the mol ratio of La:Co:CA being 1:1:2; water is added so that the raw materials are dissolved; stirring is performed for 12h under the room temperature condition; a precursor solution is obtained; (2) the prepared precursor solution is put into a 80 DEG C water bath heating pot for still standing for 12h, so that the prepared precursor solution completely becomes gel; (3) the raw materials are put in a vacuum drying box for 12h to be dried; (4) the temperature of a muffle furnace is raised to 50 DEG C at a speed being 5 DEG C/min; calcination is performed for 3h; a catalyst of LaFeO3 powder is obtained; (5) the calcined LaFeO3 powder is ground into uniform fine particles for use. The perovskite catalyst LaFeO3 can efficiently activate persulfate; SO4 - with high oxidative activity is produced; the removal of non-degradable medicine pollutants is completed; the water quality is obviously improved; the water quality safety is guaranteed. La(NO3)3 6H2O and Fe(NO3)3 9H2O which are cheap and are easily obtained are used as major preparation raw materials; the perovskite catalyst LaFeO3 is prepared through work procedures of water bath, gelling, drying, calcinations and grinding.

Description

【Technical field】 [0001] The invention belongs to the technical field of water body advanced treatment, and relates to a perovskite catalyzed persulfate and a preparation method and application thereof. 【Background technique】 [0002] In recent years, the problem of drug pollution in various water bodies has become increasingly prominent. Compared with conventional pollutants, although the concentration of pharmaceutical pollutants in sewage (waste) water is very low, it is difficult to effectively remove them by conventional sewage treatment processes, so pharmaceutical pollutants are continuously discharged into surface water such as rivers and lakes, and eventually into drinking water sources. Therefore, the removal of pharmaceutical pollutants in water has important environmental and ecological significance. [0003] Since the conventional water treatment and sewage treatment processes mainly remove suspended and colloidal pollutants in water, the ability to remove org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/10C02F1/72C02F101/38
CPCC02F1/725B01J23/83B01J35/1014B01J35/1038B01J35/1066C02F2101/38C02F2101/36C02F2101/34
Inventor 饶永芳薛丹王骄阳冯江涛
Owner XI AN JIAOTONG UNIV
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