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A kind of preparation method of cerium manganese metal ion modified aluminate photocatalyst

A metal ion modification and photocatalyst technology, which is applied in the field of aluminate photocatalyst preparation, can solve unsolved problems such as easy hydrolysis, and achieve the effects of economical use, good repeatability, and a wide range of choices

Active Publication Date: 2022-08-09
CHONGQING THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But MAl 2 o 4 As a photocatalyst, it is easily hydrolyzed, and the MAl prepared by this method 2 o 4 MAl in :Ce:Mn Photocatalyst 2 o 4 It exists in the form of a complex, and does not solve the problem of easy hydrolysis
Therefore, improving the synthesis method to synthesize MAl with multi-layer coating structure 2 o 4 :Ce:Mn photocatalyst is a big challenge

Method used

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  • A kind of preparation method of cerium manganese metal ion modified aluminate photocatalyst
  • A kind of preparation method of cerium manganese metal ion modified aluminate photocatalyst
  • A kind of preparation method of cerium manganese metal ion modified aluminate photocatalyst

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Embodiment 1

[0029] A preparation method of a cerium manganese metal ion-modified aluminate photocatalyst, comprising the following steps:

[0030] Step 1: Take a beaker with a scale of 100 mL, add MgAl with a molar ratio of 0.1:0.9 to cerium salt (cerium chloride) + manganese salt (manganese sulfate) 2 O 4 , the molar ratio of cerium chloride and manganese sulfate is 0.8:0.1, then add 20 mL of alcohol, and sonicate for half an hour in an ultrasonic apparatus; then, take it out, let it stand for 12 hours, and pour off the supernatant.

[0031] Step 2: Add 20 mL of deionized water to the above beaker, weigh 0.8 part of cerium chloride, and add it to the beaker for magnetic stirring; after it is completely dissolved, add 4.728g citric acid, 20g glucose, 9.5959g acrylamide and 1.9192g g Methylenebisacrylamide, each time a reagent is added, it is necessary to wait for the previous reagent to be completely dissolved before continuing to add.

[0032] Step 3: Under the condition of thermal pol...

Embodiment 2

[0035]A preparation method of a cerium manganese metal ion-modified aluminate photocatalyst, comprising the following steps:

[0036] Step 1: Take a beaker with a scale of 100 mL, add BaAl with a molar ratio of 0.1:0.9 to cerium salt (cerium chloride) + manganese salt (manganese sulfate) 2 O 4 , the molar ratio of cerium chloride and manganese sulfate is 0.8:0.1, then add 20 mL of alcohol, and sonicate for half an hour in an ultrasonic instrument; then, take it out, let it stand for 12 hours, and pour off the supernatant.

[0037] Step 2: Add 20 mL of deionized water to the above beaker, weigh 0.8 part of cerium chloride, and add it to the beaker for magnetic stirring; after it is completely dissolved, add 4.728g citric acid, 20g glucose, 9.5959g acrylamide and 1.9192g g Methylenebisacrylamide, each time a reagent is added, it is necessary to wait for the previous reagent to be completely dissolved before continuing to add.

[0038] Step 3: Under the condition of thermal pol...

Embodiment 3

[0042] A preparation method of a cerium manganese metal ion-modified aluminate photocatalyst, comprising the following steps:

[0043] Step 1: Take a beaker with a scale of 100mL, add MgAl with a molar ratio of 0.1:0.9 to cerium salt (cerium chloride) + manganese salt (manganese sulfate) 2 O 4 , the molar ratio of cerium chloride and manganese sulfate is 0.8:0.1, then add 20 mL of alcohol, and sonicate for half an hour in an ultrasonic instrument; then, take it out, let it stand for 12 hours, and pour off the supernatant.

[0044] Step 2: Add 20 mL of deionized water to the above beaker, weigh 0.8 part of cerium chloride, and add it to the beaker for magnetic stirring; after it is completely dissolved, add 4.728g citric acid, 20g glucose, 9.5959g acrylamide and 1.9192g g Methylenebisacrylamide, each time a reagent is added, it is necessary to wait for the previous reagent to be completely dissolved before continuing to add.

[0045] Step 3: Under the condition of irradiation...

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Abstract

The invention discloses a preparation method of a cerium-manganese metal ion-modified aluminate photocatalyst, which uses aluminate as raw material, cerium salt and manganese salt as modified metal ions, and organic acid as chelating agent to complex cerium Or manganese ions, adding appropriate amount of acrylamide and methylenebisacrylamide to polymerize and finally form a gel. After drying, sintering, cooling and other processes, and changing the polymerization conditions, the ratio of cerium and manganese ions, the ratio of acrylamide and methylenebisacrylamide, the sintering temperature, the synthesis sequence, etc., a two-step polymerization method was used to prepare the photocatalytic activity controllable. The aluminate photocatalyst modified by cerium-manganese metal ions with a core-shell structure has the advantages of low cost, simple equipment, easy mass production, and overcomes the disadvantage of easy hydrolysis when the traditional aluminate is used as a photocatalyst.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic composite metal oxide materials, in particular to a preparation method of a cerium-manganese metal ion-modified aluminate photocatalyst. Background technique [0002] Spinel MAl 2 O 4 Aluminates are a very important class of semiconductor photocatalysts. Because of their unique crystal structure and energy band structure, they exhibit extremely high photocatalytic activity in the field of photocatalysis, especially in the degradation of various organic pollutants. MAl 2 O 4 With abundant raw materials, environmental friendliness, good chemical stability, low price and easy preparation, it is an important candidate photocatalytic material for the industrial application of photocatalytic technology. However, MAl 2 O 4 The photocatalyst has a wide band gap, about 3.9 eV, and can only absorb ultraviolet light with a wavelength less than 320 nm. Therefore, the utilization rate of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34C02F1/30C02F101/38
CPCB01J23/34C02F1/30C02F2101/40C02F2305/10B01J35/396B01J35/39Y02W10/37
Inventor 王仕发高华静王勇陈朝丽唐盛楠赵欣欣孙光壮
Owner CHONGQING THREE GORGES UNIV