Fe2O3/FeO heterostructure, preparation method therefor and application of Fe2O3/FeO heterostructure
A heterostructure, fe2o3 technology, applied in the field of photocatalytic materials, can solve the problems of slow oxygen evolution reaction kinetics, poor charge separation ability, development limitations, etc., and achieve the effects of easy mass synthesis, simple preparation method, and improved production efficiency.
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Embodiment 1
[0040] Embodiment 1 of the present application provides a kind of Fe 2 o 3 / FeO heterostructure preparation method.
[0041] The beakers and measuring cylinders used in the experiments of the examples were cleaned with an ultrasonic cleaner.
[0042] The substrate in Example 1 of the present application uses FTO glass. First, clean the FTO glass to remove the grease and other pollutants on the surface, and use an ultrasonic cleaning machine for 10 minutes to sonicate the FTO glass to make the FTO glass hydrophilic.
[0043] The preparation method comprises the following steps:
[0044] Step S1: Weigh the raw material FeCl 3 ·6H 2 O 0.811g was placed in 20mL deionized water, 40uL HCl was added thereto, and the above mixed solution was placed on a magnetic stirrer and stirred until completely dissolved;
[0045] Step S2: Transfer the solution obtained in step S1 to a 50mL polytetrafluoroethylene reactor, and at the same time put the hydrophilically treated FTO glass into th...
Embodiment 2
[0061] The Fe obtained in Example 1 2 o 3 / FeO heterostructure and the Fe prepared in Comparative Example 1 2 o 3 Conduct photoelectric tests separately. The instrument used in the test is a controllable intensity modulation spectrometer (CIMPS). In the three-electrode system, a saturated Ag / AgCl electrode was used as the reference electrode, a Pt wire electrode was used as the counter electrode, and Fe obtained in Example 1 was used. 2 o 3 / FeO heterogeneous structure as the working electrode; 1M potassium hydroxide solution as the electrolyte, and an LED lamp with a wavelength of 560±60nm as the light source; the time-current curve under the light-on condition is the photocurrent of the sample measured at a voltage of 0V size.
[0062] figure 1 Fe of Example 1 of the present application 2 o 3 / FeO heterostructure and the Fe of Comparative Example 1 2 o 3 The photocurrent curve. see figure 1 , showing the generation and separation efficiency of photogenerated car...
Embodiment 3
[0065] Hydrogen production experiments were carried out on the Fe2O3 / FeO heterostructure prepared in Example 1 of the present application and the Fe2O3 prepared in Comparative Example 1. The two were respectively placed in an electrolyte composed of 22.5g triethanolamine and 80g deionized water. Under the light conditions of a 100W xenon lamp, the hydrogen gas generated was collected by a gas chromatograph every hour, and finally drawn into a graph. Image 6 Hydrogen production diagrams in Example 3 for the Fe2O3 / FeO heterostructure prepared in Example 1 of the present application and the Fe2O3 prepared in Comparative Example 1. Depend on Image 6 It can be seen that the Fe2O3 / FeO heterostructure prepared in Example 1 of the present application has better hydrogen production ability, and does not need to add any co-catalyst, and spontaneously produces hydrogen.
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