Nickel zinc ferrite/bismuth tungstate magnetic composite photocatalytic material and preparation method thereof

A technology of composite photocatalysis and nickel zinc ferrite, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low catalytic activity of visible light, tungstic acid Bismuth is difficult to recycle, etc., to achieve the effects of high visible light catalytic activity, wide visible light response range, and mild conditions

Active Publication Date: 2020-12-08
YANAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The first object of the present invention is to provide a nickel-zinc ferrite / bismuth tungstate magnetic composite photocatalytic material, which solves the problem that the visible light catalytic activity of bismuth tungstate and nickel-zinc ferrite is not high, and that bismuth tungstate is difficult to recycle. question

Method used

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  • Nickel zinc ferrite/bismuth tungstate magnetic composite photocatalytic material and preparation method thereof
  • Nickel zinc ferrite/bismuth tungstate magnetic composite photocatalytic material and preparation method thereof
  • Nickel zinc ferrite/bismuth tungstate magnetic composite photocatalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Step 1: Take by weighing 0.1091g Ni(NO 3 ) 2 , 0.1115g Zn(NO 3 ) 2 and 0.6060g of Fe(NO 3 ) 3 , Dissolve it in a mixed liquid composed of 10mL water and 5mL liquid polyethylene glycol (PEG-400) and stir it rapidly for 120min, then add NH 3 ·H 2 O to adjust the pH to 10, continue stirring for 30 min, and transfer the resulting mixed liquid to a 50 mL stainless steel autoclave with a polytetrafluoroethylene liner for hydrothermal reaction at 180 °C for 5 h; Separation, the resulting precipitate was washed with water, washed with alcohol, dried in vacuum at 80°C for 7 hours, and ground to obtain Ni 0.5 Zn 0.5 Fe 2 o 4 , denoted as NZTY;

[0058] Step 2: Weigh 0.1050g of Ni 0.5 Zn 0.5 Fe 2 o 4 , it was added to 45mL of CTAB aqueous solution with a concentration of 8.23mmol / L and ultrasonically dispersed for 30min, and 2.9198g of Bi(NO 3 ) 3 ·5H 2 O, then add 2.5mL concentration of 4mol / L dilute nitric acid solution, high-speed magnetic stirring at room temp...

Embodiment 2

[0060] Step 1: Take by weighing 0.1091g Ni(NO 3 ) 2 , 0.1115g Zn(NO 3 ) 2 and 0.6060g of Fe(NO 3 ) 3 , Dissolve it in a mixed liquid composed of 10mL water and 5mL liquid polyethylene glycol (PEG-400) and stir it rapidly for 120min, then add NH 3 ·H 2 O to adjust the pH to 10, continue stirring for 30 min, and transfer the resulting mixed liquid to a 50 mL stainless steel autoclave with a polytetrafluoroethylene liner for hydrothermal reaction at 180 °C for 5 h; Separation, the resulting precipitate was washed with water, washed with alcohol, dried in vacuum at 80°C for 7 hours, and ground to obtain Ni 0.5 Zn 0.5 Fe 2 o 4 , denoted as NZTY;

[0061] Step 2: Weigh 0.1050g of Ni 0.5 Zn 0.5 Fe 2 o 4 , was added to 45 mL of CTAB aqueous solution with a concentration of 8.23 ​​mmol / L and ultrasonically dispersed for 30 min, and 1.4599 g of Bi(NO 3 ) 3 ·5H 2 O, then add 2.5mL concentration of 4mol / L dilute nitric acid solution, high-speed magnetic stirring at room t...

Embodiment 3

[0063] Step 1: Take by weighing 0.1091g Ni(NO 3 ) 2 , 0.1115g Zn(NO 3 ) 2 and 0.6060g of Fe(NO 3 ) 3 , Dissolve it in a mixed liquid composed of 10mL water and 5mL liquid polyethylene glycol (PEG-400) and stir it rapidly for 120min, then add NH 3 ·H 2 O to adjust the pH to 10, continue stirring for 30 min, and transfer the resulting mixed liquid to a 50 mL stainless steel autoclave with a polytetrafluoroethylene liner for hydrothermal reaction at 180 °C for 5 h; Separation, the resulting precipitate was washed with water, washed with alcohol, dried in vacuum at 80°C for 7 hours, and ground to obtain Ni 0.5 Zn 0.5 Fe 2 o 4 , denoted as NZTY;

[0064] Step 2: Weigh 0.1050g of Ni 0.5 Zn 0.5 Fe 2 o 4 , it was added to 45mL of CTAB aqueous solution with a concentration of 8.23mmol / L and ultrasonically dispersed for 30min, adding 0.9733gBi(NO 3 ) 3 ·5H 2 O, then add 2.5mL concentration of 4mol / L dilute nitric acid solution, high-speed magnetic stirring at room tempe...

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Abstract

The invention discloses a nickel-zinc ferrite / bismuth tungstate magnetic composite photocatalytic material, which comprises Bi2WO6 and Ni0.5Zn0.5Fe2O4, wherein a mass ratio of Ni0.5Zn0.5Fe2O4 to Bi2WO6 is 1-4:10. The invention further discloses a method for preparing the nickel-zinc ferrite / bismuth tungstate magnetic composite photocatalytic material. According to the present invention, the nickel-zinc ferrite / bismuth tungstate magnetic composite photocatalytic material has advantages of wide visible light response range, high visible light photocatalytic activity, easy recovery by magnetic separation technology and stable repeated use performance.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation methods, in particular to a nickel-zinc ferrite / bismuth tungstate magnetic composite photocatalytic material, and also to a method for preparing nickel-zinc ferrite / bismuth tungstate magnetic composite photocatalytic material . Background technique [0002] Bismuth tungstate (Bi 2 WO 6 ) is the simplest structure of Aurivillius-type oxides, its Bi6s orbital and O2p orbital are hybridized to form the valence band (VB), and the W5d orbital forms the conduction band (CB). Thanks Bi 2 WO 6 The bandgap width is narrow (about 2.7eV), and it can be excited by absorbing part of visible light, so it has potential application value in the field of environmental purification and new energy development, and has become one of the widely researched photocatalysts. However, as a photocatalyst, Bi 2 WO 6 There are three main problems: first, photogenerated electrons / holes (e- / h+) are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J37/08B01J37/03B01J37/34B01J37/10C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J23/002B01J23/888B01J35/0033B01J35/004B01J37/031B01J37/082B01J37/10B01J37/343B01J2523/00C02F1/30C02F2101/34C02F2101/36C02F2101/38C02F2305/10B01J2523/27B01J2523/842B01J2523/847
Inventor 郭莉韩宣宣张开来王丹军王婵付峰
Owner YANAN UNIV
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