ZnO/ZnSe nano material, and preparation method and application thereof
A technology of nanomaterials and nanosheets, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of synthesis of heterogeneous array structures of ZnO/ZnSe nanowalls, and achieve low cost and good cycle stability , high catalytic activity
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Embodiment 1
[0027] A preparation method of ZnO / ZnSe nanometer material, comprises the following steps:
[0028] (1) Add 2 mL of 1,6-hexanediamine dropwise to 38 mL of deionized water, and stir evenly to obtain solution A; dissolve 0.297 g of sodium sulfide nonahydrate into solution A to obtain solution B. Pour solution B into a Teflon-lined stainless steel autoclave. Next, clean zinc flakes (99.9% 1 x 3 cm) were placed obliquely in the solution. The autoclave was sealed and reacted at 150° C. for 10 h. After the reaction, it was naturally cooled to room temperature. The gray product on the zinc sheet was rinsed three times with deionized water and absolute ethanol respectively, and then vacuum-dried at 50°C for 6 hours.
[0029] (2) Add 0.01g of selenium powder to a mixed solution of 20mL of ammonia water and 20mL of deionized water, stir continuously in a 100mL glass reaction bottle to form a uniform solution, and then add 0.01g of sodium borohydride. After stirring for 30 min, the z...
Embodiment 2
[0036] Application of a ZnO / ZnSe nanomaterial for visible light catalytic degradation of organic dyes.
[0037] Cut the ZnO / ZnSe nanowall heterogeneous array structure product prepared above into a size of 1×1.5cm, put it into 5mL with a concentration of 1.0×10 -5 mol / L RhB solution and stirred in the dark for 1 h, so that the catalyst surface reached adsorption-desorption equilibrium. After that, visible light irradiation was performed using a 300W xenon lamp. The absorption spectrum of the solution was measured every 20 min using a UV-Vis spectrophotometer (ShimadzuUV-2550), and the concentration of RhB was determined by the characteristic absorption peak at 554 nm. The UV absorption spectrum of the degradation results is as follows Figure 5 As shown, the change curve of concentration with time during the degradation process is shown as Image 6 shown. After visible light irradiation for 120min, the degradation rate reached 93%. Obviously, the synergistic effect betwee...
Embodiment 3
[0039] Cyclic performance of a ZnO / ZnSe nanomaterial as a visible light catalyst for the degradation of rhodamine B.
[0040]The array structure catalyst after photocatalytic degradation was taken out with tweezers, washed several times with deionized water and absolute ethanol, and put back into fresh RhB solution for photocatalytic degradation experiment. The results are shown in Table 1. The research results show that the degradation rate of the photocatalyst still reaches 91.2% after 10 cycles, indicating that the photocatalyst has good photocatalytic cycle stability for RhB, which is very attractive for practical applications.
[0041] Table 1 shows the cycling results of visible light photocatalytic degradation of RhB with ZnO / ZnSe nanowall heterogeneous array structure in Example 3.
[0042] Table 1
[0043]
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