A nanocomposite photocatalytic film material and its preparation method

A photocatalytic thin film and nanocomposite technology, applied in the field of photocatalysis, can solve problems such as poor recycling rate, increased water treatment cost, and difficult recycling, and achieve the effects of low cost, easy control, and simple process

Active Publication Date: 2020-01-14
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering that the composite materials prepared by these methods are all nano-materials in the form of powder, in specific industrial application environments, nano-powder materials are generally difficult to recycle and have poor reutilization, which greatly increases the cost of water treatment.

Method used

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  • A nanocomposite photocatalytic film material and its preparation method
  • A nanocomposite photocatalytic film material and its preparation method
  • A nanocomposite photocatalytic film material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation method of BiOI / BiOBr nano composite photocatalytic film material with sheet-like layered structure

[0026] Firstly, a BiOI precursor film material with a sheet-like layered structure was prepared on the surface of the stainless steel substrate by in-situ growth under hydrothermal conditions. Weigh 8mmol Bi(NO 3 ) 3 ·5H 2 O and 0.1g PVP were added to 70mL ethylene glycol, ultrasonically dispersed for 30min, 8mmol KI was weighed and dissolved in 10mL water, and then the two solutions were mixed uniformly and transferred to a 100mL reactor. The pre-pretreated stainless steel mesh is immersed in the above mixed solution. Then the reaction kettle was heated to 140°C, and the reaction time was 4h. After the completion of the reaction, the stainless steel mesh was taken out, washed with absolute ethanol and distilled water in turn, and finally placed in a drying oven at 60°C for 6 hours. Weigh 0.48mmol of tetrabutylammonium bromide into 80mL of water, ma...

Embodiment 2

[0029] Example 2: Preparation method of BiOI / BiOBr nano composite photocatalytic film material with sheet-like layered structure

[0030] Firstly, a BiOI precursor film material with a sheet-like layered structure was prepared on the surface of the stainless steel substrate by in-situ growth under hydrothermal conditions. Weigh 4mmol Bi(NO 3 ) 3 ·5H 2 O and 0.2g PVP were added to 70mL ethylene glycol, ultrasonically dispersed for 30min, 4mmol KI was weighed and dissolved in 10mL water, then the two solutions were mixed uniformly and transferred to a 100mL reactor. The pre-pretreated stainless steel mesh is immersed in the above mixed solution. Then the reaction kettle was heated to 160°C, and the reaction time was 8h. After the completion of the reaction, the stainless steel mesh was taken out, washed with absolute ethanol and distilled water in turn, and finally placed in a drying oven at 60°C for 6 hours. Weigh 0.80mmol of tetrabutylammonium bromide and add it to 80mL of wate...

Embodiment 3

[0031] Example 3: Preparation method of BiOI / BiOBr nanocomposite photocatalytic film material with sheet-like layered structure

[0032] Firstly, a BiOI precursor film material with a sheet-like layered structure was prepared on the surface of the stainless steel substrate by in-situ growth under hydrothermal conditions. Weigh 12mmol Bi(NO 3 ) 3 ·5H 2 O and 0.05g PVP were added to 70mL ethylene glycol, ultrasonically dispersed for 30min, 12mmol KI was weighed and dissolved in 10mL water, then the two solutions were mixed uniformly and transferred to a 100mL reactor. The pre-pretreated stainless steel mesh is immersed in the above mixed solution. Then the reaction kettle was heated to 120°C, and the reaction time was 12h. After the completion of the reaction, the stainless steel mesh was taken out, washed with absolute ethanol and distilled water in turn, and finally placed in a drying oven at 60°C for 6 hours. Weigh 0.16mmol of tetrabutylammonium bromide and add it to 80mL of w...

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Abstract

The invention belongs to the field of photocatalysis, and particularly relates to a photocatalytic thin film material and a preparation method thereof. The BiOI / BiOBr nanocomposite photocatalytic thin film material adopting a flaky and layered structure is prepared from BiOI and BiOBr according to a molar ratio of 0.1-0.5 by an in-situ growth method and in an ion exchange mode. In the preparation process, the in-situ growth is combined with the ion exchange method, and the prepared BiOI / BiOBr material can be well attached to the surface of a stainless steel substrate to form a layer of thin film material with visible-light catalytic activity. The preparation method is simple in process, easy to control and low in cost; by the preparation method, a BiOI / BiOBr nanocomposite flaky film layer structure with a visible-light catalytic effect is established; the BiOI / BiOBr nanocomposite flaky film layer structure has a potential application prospect in the field of water purification, marine pollution prevention and the like.

Description

Technical field [0001] The invention belongs to the field of photocatalysis, and specifically relates to a photocatalytic film material and a preparation method thereof. Background technique [0002] With the overall progress of human society, human beings have increasingly greater influence on the ecology of the original natural world, and a series of environmental problems have been created when natural resources are over-exploited and utilized. Among them, environmental problems such as scarcity of water resources and water pollution have become increasingly prominent. Therefore, sewage treatment is particularly important. Among many sewage treatment processes, photocatalytic oxidation degradation technology has outstanding advantages due to its high efficiency, non-selectivity, high stability, green non-toxicity, no secondary pollution, low energy consumption, simple operation and low cost. Especially in recent years with nano-TiO 2 The representative semiconductor photocat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06B01J35/02B01J35/10C02F1/30C02F101/38C02F101/34C02F101/36
CPCB01J27/06B01J35/004B01J35/02B01J35/1004C02F1/30C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 王毅龙洋张盾
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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