Preparation method for petal-fold-shaped nanometer iron oxide coating
A nano-iron oxide and wrinkle technology, applied in the field of environmental analysis and nano-materials, to achieve good mechanical stability and repeatability, high extraction efficiency, and easy control
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Embodiment 1
[0022] (1) Take a piece of iron wire with Φ=0.25 mm, first use 1.0 M sodium hydroxide solution to ultrasonically clean it for 20 minutes, then use acetone to ultrasonically clean it for 10 minutes, and finally use ultrapure water to ultrasonically clean it for 10 minutes;
[0023] (2) At 30°C, immerse the cleaned iron wire in a sulfuric acid solution with a mass concentration of 30% and etch for 60 min; rinse the etched iron wire with ultrapure water, dry it in isolated air, and set aside;
[0024] (3) Manually ignite the lighter, put one end of the etched iron wire into the flame center of the flame, burn for 30 s, and prepare nano-iron oxide on the surface of the iron wire;
[0025] (4) Rinse the iron wire after burning with ultrapure water and methanol in sequence, and dry it in isolation from the air, and prepare a uniform petal-shaped wrinkled nano-iron oxide coating on the surface of the iron wire.
[0026] The SEM image of the nano-iron oxide coating prepared above is s...
Embodiment 2
[0028] (1) Take a section of iron wire with Φ=0.35 mm, first use 1.2 M potassium hydroxide solution to ultrasonically clean it for 20 minutes, then use acetone to ultrasonically clean it for 15 minutes, then use ultrapure water to ultrasonically clean it for 10 minutes, and dry it in isolated air for later use;
[0029] (2) At 50°C, immerse the cleaned stainless steel wire in a hydrochloric acid solution with a mass concentration of 30% and etch for 30 min; the etched iron wire is cleaned with ultrapure water, isolated from the air and dried, and set aside;
[0030] (3) Manually ignite the lighter, put one end of the etched iron wire into the inner flame position of the flame, burn for 20 s, and make nano-iron oxide on the surface of the iron wire;
[0031] (4) Rinse the burned iron wire with ultrapure water and methanol respectively, and dry it in isolation from the air, and prepare a uniform petal-shaped wrinkled nano-iron oxide coating on the surface of the iron wire.
[00...
Embodiment 3
[0034] (1) Take a piece of iron wire with Φ=0.35 mm, first use 1.5 M potassium hydroxide solution to ultrasonically clean it for 15 minutes, then use acetone to ultrasonically clean it for 15 minutes, and then use ultrapure water to ultrasonically clean it for 15 minutes, then dry it in isolated air, and set it aside;
[0035] (2) At 50°C, immerse the cleaned stainless steel wire in a hydrochloric acid solution with a mass concentration of 30% and etch for 30 min; the etched iron wire is cleaned with ultrapure water, isolated from the air and dried, and set aside;
[0036] (3) Put one end of the etched iron wire into the inner flame position of the flame of the alcohol lamp, burn for 40 s, and make nano-iron oxide on the surface of the iron wire;
[0037] (4) Rinse the burned iron wire with ultrapure water and methanol respectively, and dry it in isolation from the air, and prepare a uniform petal-shaped wrinkled nano-iron oxide coating on the surface of the iron wire.
[0038...
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