Process for preparing block-shaped nano-sized iron oxide coating through flame method

A technology of nano-iron oxide and flame method, which is applied in the field of environmental analysis and nano-materials to achieve the effects of easy control, high efficiency and strong stability

Active Publication Date: 2017-01-04
扬州欧拉工业设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of nano-iron oxide as a solid-phase microextraction coating has not been reported yet.

Method used

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  • Process for preparing block-shaped nano-sized iron oxide coating through flame method
  • Process for preparing block-shaped nano-sized iron oxide coating through flame method
  • Process for preparing block-shaped nano-sized iron oxide coating through flame method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Take an iron wire with Φ=0.25 mm, first use 1.0M dilute hydrochloric acid to ultrasonically clean it for 15 minutes, then use acetone to ultrasonically clean it for 10 minutes, and finally use ultrapure water to ultrasonically clean it for 10 minutes; isolate the air and dry it for later use;

[0022] (2) Manually ignite the lighter, put one end of the cleaned iron wire into the inner flame position of the flame, burn for 5 s, and make nano iron oxide on the surface of the iron wire;

[0023] (3) Rinse the burnt iron wire with ultrapure water for 3 minutes, then with methanol for 8 minutes, and dry it in isolation from the air to obtain a uniform nano-iron oxide coating on the surface of the iron wire.

[0024] The SEM image of the prepared nano-iron oxide coating is attached figure 1 (The picture on the left is an SEM picture with a magnification of 20,000 times, and the picture on the right is an SEM picture with a magnification of 50,000 times.). Depend on figu...

Embodiment 2

[0026] (1) Take Φ=0.25 mm stainless steel wire, first use 1.5M oxalic acid to ultrasonically clean it for 15 minutes, then use acetone to ultrasonically clean it for 10 minutes, then use ultrapure water to ultrasonically clean it for 10 minutes, dry it in isolation, and set aside;

[0027] (2) Manually ignite the lighter, put one end of the cleaned stainless steel wire into the inner flame position of the flame, burn for 10 s, and prepare nano-iron oxide on the surface of the stainless steel wire;

[0028] (3) Rinse the burnt stainless steel wire with ultrapure water for 5 min, then with methanol for 8 min, and store it in an air-isolated dry place to obtain a uniform nano-iron oxide coating on the surface of the stainless steel wire.

[0029] The SEM image of the prepared nano-iron oxide coating is shown in figure 2 (The picture on the left is an SEM picture with a magnification of 20,000 times, and the picture on the right is an SEM picture with a magnification of 50,000 ti...

Embodiment 3

[0031] (1) Take a piece of Φ=0.35 mm iron wire, first use 1.5M phosphoric acid to ultrasonically clean the iron wire for 15 minutes, then use acetone to ultrasonically clean it for 10 minutes, and finally use ultrapure water to ultrasonically clean it for 10 minutes, isolate it from the air and dry it, and set it aside;

[0032] (2) Put one end of the cleaned iron wire into the outer flame position of the flame of the alcohol lamp, burn for 20 s, and make nano-iron oxide on the surface of the iron wire;

[0033] (3) Rinse the burnt iron wire with ultrapure water for 4 minutes, and then with methanol for 8 minutes, and store it in a dry place isolated from air to obtain a uniform nano-iron oxide coating.

[0034] The SEM image of the prepared nano-iron oxide coating is shown in image 3 (The picture on the left is an SEM picture with a magnification of 20,000 times, and the picture on the right is an SEM picture with a magnification of 50,000 times.). Depend on image 3 It ca...

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Abstract

The invention discloses a process for preparing a block-shaped nano-sized iron oxide coating through a flame method. After being subjected to ultrasonic cleaning and dried in an air isolating mode, a stainless steel wire or iron wire is put into flames to be subjected to combustion oxidation, and nano-sized iron oxide is prepared on the surface of the stainless steel wire or iron wire; and then the stainless steel wire or iron wire is washed with ultrapure water and methyl alcohol and dried in an air isolating mode, and the uniform block-shaped nano-sized iron oxide coating is formed on the stainless steel wire or iron wire. EDS data analysis shows that a product generated on the surface of the stainless steel wire or iron wire is the iron oxide. SEM analysis shows that the grain size of the nano-sized iron oxide coating is 100 nm-200 nm, the nano-sized iron oxide coating is in a uniform block shape, and the size and shape of the nano-sized iron oxide can be controlled through the distance between the metal wire and the flames and the combustion time. Experiments show that compared with fused quartz fibers, the coating has good mechanical stability and repeatability, polycyclic aromatic hydrocarbons in environmental samples can be extracted, the extraction efficiency is high, and the stability is high.

Description

technical field [0001] The invention relates to a method for preparing a nano-iron oxide coating, in particular to a process for preparing a block-shaped nano-iron oxide coating by a flame method, which is mainly used for the coating material of the extraction head in the solid-phase microextraction technology, and belongs to nanomaterials domain and environmental analysis domain. Background technique [0002] Solid Phase Microextraction (Solid Phase Microextraction, SPME) is a new type of sample pretreatment technology. It has the advantages of convenient operation, rapidity, sensitivity and no need for a large amount of organic solvents, so it has been widely used in separation and analysis, and can be used to detect water samples, air, soil, food, medicine, pesticides, biological samples, etc. The coating of the extraction head is the core of solid-phase microextraction. The properties of the coating play a decisive role in the selectivity and sensitivity of the extracti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/14G01N1/34
CPCC23C8/14G01N1/34
Inventor 杨尧霞李健刘小军朱海滨雷自强杜新贞
Owner 扬州欧拉工业设计有限公司
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