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Preparation method and application of nitrogen-doped BiOIO3 photocatalyst

A photocatalyst and nitrogen doping technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as the inability to utilize sunlight well, the low catalytic activity of visible light, and the poor response to visible light. , to achieve significant photocatalytic degradation of organic pollutants, low product cost, high application prospects and practical value.

Active Publication Date: 2019-03-01
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But BiOIO 3 The bandgap width is large, the response to visible light is poor, th

Method used

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  • Preparation method and application of nitrogen-doped BiOIO3 photocatalyst
  • Preparation method and application of nitrogen-doped BiOIO3 photocatalyst

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Embodiment 1

[0036] A nitrogen-doped BiOIO 3 The preparation method of photocatalyst comprises the steps:

[0037] BiOIO 3 Preparation: Weigh 0.485g of bismuth nitrate pentahydrate and 0.214g of potassium iodate and dissolve them in 70 mL of distilled water to obtain solution A; transfer solution A to a 100 mL hydrothermal reactor, react at 120°C for 16 hours, and cool naturally to After filtering at room temperature, the resulting solid powder was washed with distilled water, dried at 60°C, and ground to obtain BiOIO 3 Photocatalyst powder.

[0038] Nitrogen-doped BiOIO 3 Preparation: Weigh 0.1g urea and 0.2g BiOIO 3 , placed in a mortar, ground and mixed evenly, transferred to a crucible, and then placed in a muffle furnace for calcination at 180°C for 6h, the product was naturally cooled to room temperature, and ground to obtain nitrogen-doped BiOIO 3 .

[0039] The resulting BiOIO 3 and nitrogen-doped BiOIO 3 The X-ray diffraction pattern of figure 1 shown. Visible nitrogen ...

Embodiment 2

[0041] A nitrogen-doped BiOIO 3 The preparation method of photocatalyst comprises the steps:

[0042] BiOIO 3 Preparation: Weigh 0.485g of bismuth nitrate pentahydrate and 0.214g of potassium iodate and dissolve in 70 mL of distilled water to obtain solution A; transfer solution A to a 100 mL hydrothermal reactor, react at 160°C for 4 hours, and cool naturally to After filtering at room temperature, the obtained solid powder was washed with distilled water, dried at 90°C, and ground to obtain BiOIO 3 Photocatalyst powder.

[0043] Nitrogen-doped BiOIO 3 Preparation: Weigh 0.02g urea and 0.2g BiOIO 3 , placed in a mortar, ground and mixed evenly, transferred to a crucible, and then placed in a muffle furnace for calcination at 260 ° C for 2 h, the product was naturally cooled to room temperature, and ground to obtain nitrogen-doped BiOIO 3 .

[0044] The resulting nitrogen-doped BiOIO 3 The scanning electron microscope image is shown in figure 2 As shown, it can be see...

Embodiment 3

[0046] A nitrogen-doped BiOIO 3 The preparation method of photocatalyst comprises the steps:

[0047] BiOIO 3 Preparation: Weigh 0.485g of bismuth nitrate pentahydrate and 0.214g of potassium iodate and dissolve in 70 mL of distilled water to obtain solution A; transfer solution A to a 100 mL hydrothermal reactor, react at 140°C for 10 hours, and cool naturally to After filtering at room temperature, the obtained solid powder was washed with distilled water, dried at 80°C, and ground to obtain BiOIO 3 Photocatalyst powder.

[0048] Nitrogen-doped BiOIO 3 Preparation: Weigh 0.05g urea and 0.2g BiOIO 3 , placed in a mortar, ground and mixed evenly, transferred to a crucible, and then placed in a muffle furnace for calcination at 230 ° C for 3 h, the product was naturally cooled to room temperature, and ground to obtain nitrogen-doped BiOIO 3 .

[0049] The obtained BiOIO of this embodiment 3 and nitrogen-doped BiOIO 3 The UV-Vis absorption spectrum such as image 3 show...

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Abstract

The invention belongs to the technical field of preparation and application of nano materials and relates to a photocatalyst, in particular to a preparation method of a nitrogen-doped BiOIO3 photocatalyst. The preparation method comprises: preparing a mixed solution of equimolar bismuth nitrate pentahydrate and potassium iodate, transferring to a hydrothermal reactor, allowing reacting at 120-160DEG C for 4-16 h, filtering after natural cooling, washing with water, drying, and grinding to obtain BiOIO3 nanoparticles; mixing the BiOIO3 nanoparticles and urea, grinding, calcining in a muffle furnace at 180-260 DEG C for 2-6 h, allowing natural cooling, and grinding to obtain the nitrogen-doped BiOIO3 photocatalyst. The invention also discloses application of the nitrogen-doped BiOIO3 photocatalyst in photocatalytic degradation of organic pollutants in wastewaters. The preparation method is simple and feasible and is good in safety and environmental friendliness; the product cost is low;the preparation method is easy to apply to industrial production and has very promising application prospect and very high practical value. The prepared nitrogen-doped BiOIO3 photocatalyst is effective in improving visible light absorbing performance of a material, improving light current intensity of the material, and enhancing reaction activity of photo-induced electrons and holes of the material, and is evidently effective in photocatalytically degrading organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of nanomaterials, relates to photocatalysts, and in particular to a nitrogen-doped BiOIO 3 Preparation method of photocatalyst and its application. Background technique [0002] With the rapid development of the chemical synthesis industry, a large number of organic chemical substances, such as dyes, pesticides, daily care products, and antibiotics, have been used and discharged in large quantities, causing serious water pollution and posing a huge threat to human health. Treatment technologies for organic pollutants in water usually include biological purification, chemical oxidation, physical adsorption, etc. These technologies have played an important role in today's water environment restoration. However, the application range of biological purification method is limited, and the effect on some low-content, refractory organic pollutants is poor; chemical oxidation method i...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J35/0013B01J35/004C02F1/30C02F2101/308C02F2101/34C02F2101/345C02F2101/36C02F2101/38C02F2305/10
Inventor 黄立英王雅芹李夜平张艺瑞
Owner JIANGSU UNIV
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