Cuprous oxide nanowire photocathode and preparation method thereof, photoelectrochemical device
A cuprous oxide and nanowire technology, applied in electrolytic components, electrodes, electrolytic processes, etc., can solve problems such as photocorrosion catalytic performance, and achieve the effect of improving photoelectric catalytic performance, improving cycle stability, and broad application prospects.
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[0041] The embodiment of the present invention also provides the preparation method of the cuprous oxide nanowire photocathode as described above, refer to figure 1 , the preparation method comprises the following steps:
[0042] Step S110: providing a copper metal substrate and growing copper hydroxide nanowires on the copper metal substrate.
[0043] In a preferred solution, the thickness of the metallic copper substrate is 0.4mm-0.6mm.
[0044] In a preferred scheme, the metal copper substrate is also pretreated before growing copper hydroxide nanowires, specifically including:
[0045] Cut the metal copper substrate into a predetermined size, for example, 1×2cm 2 ;
[0046] Cleaning the surface organic matter of the cut metal copper substrate, specifically: immersing the metal copper substrate in a mixed solution of acetone and alcohol solvent for ultrasonic treatment for 10 minutes to 20 minutes, wherein the mass ratio of the acetone and alcohol solvent is 1 :1~1:2; The...
Embodiment 1
[0062] Example 1: Preparation and acquisition of Cu 2 O nanowire photocathode
[0063] (1) select metal copper substrate, and it is pretreated, specifically comprises the following steps:
[0064] a. Cut the metal copper substrate into 1×2cm 2 size;
[0065] b. Sonicate the cut metal copper substrate in a 1:1 mixed solution of acetone and absolute ethanol for 15 minutes;
[0066] c. Soak the metallic copper substrate treated in step b in 0.01M dilute hydrochloric acid for 10 minutes;
[0067] d, then immerse the metal copper substrate processed in step c in absolute ethanol for 10 minutes;
[0068] e. Finally, use high-purity nitrogen (N 2 , 99.999%) dry the metal copper substrate.
[0069] (2) Connect the dried metallic copper substrate to the positive electrode of the constant voltage power supply, and the metallic platinum sheet to the negative electrode, put it into 3M potassium hydroxide solution, turn on the power switch, adjust the voltage to 1.5V, and after 5 min...
Embodiment 2
[0074] Example 2: Preparation and acquisition of Co-La / Cu 2 O nanowire photocathode
[0075] (1) Prepare copper hydroxide nanowires by the same method as in Example 1 above.
[0076] (2) Soak the copper hydroxide nanowires obtained in the above step (1) in a mixed solution of 0.05M cobalt acetate and 0.01M lanthanum acetate, let it stand for 30 minutes, and dry at 60° C. for 20 minutes.
[0077] (3) Calcining the dried copper hydroxide nanowires at 600°C for 4h in an argon atmosphere, with a heating rate of 5°C / min, to obtain Co-La / Cu 2 O nanowire photocathode.
[0078] Such as Figure 5 As shown, Co-La / Cu was determined by SEM 2 The top view of the microstructure of the O nanowire photocathode, the cuprous oxide nanowire structure whose surface is covered by a protective layer containing cobalt and lanthanum metal elements cobalt and lanthanum metal elements can be observed.
[0079] As a comparison, Co / Cu was also prepared in this example 2 O nanowire photocathode and ...
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