Preparation method for zinc bloom and zinc aluminate composite nano-tubes and arrays
A technology of zinc aluminate and zinc oxide, which is applied in the field of nano-material preparation, can solve the problems of difficulty in preparing nano-zinc aluminate, particle agglomeration, etc., and achieve the effects of regular and orderly arrangement, simple preparation process and high yield
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Embodiment 1
[0015] The first step is to prepare zinc nanowires in alumina templates by electrodeposition.
[0016] Alumina templates were prepared by two-step anodic oxidation (see MasudaH, FukudaK. Science, 1995, 268(9): 146 for details). The electrolyte used in preparing the templates was 0.3mol oxalic acid solution, and the anodizing voltage was 40V. Spray gold on one side of the alumina template.
[0017] The electrolyte solution for electrodepositing zinc nanowires is 80g / L ZnSO 4 ·7H 2 O, 20g / L H 3 BO 3 , Electrodeposition voltage: 2V. Deposition time: 30 minutes.
[0018] The third step is to anneal the alumina template loaded with zinc nanowires in the air environment. The annealing specification is to heat from room temperature to 350 ° C for 20 minutes, and after 40 hours of heat preservation, it is cooled to room temperature with the furnace. This process makes the zinc nanowires into ZnO nanowires.
[0019] The fourth step is to perform secondary annealing on the alumin...
Embodiment 2
[0023] The first step is to prepare an alumina template according to the first step of Example 1, and electrodeposit zinc nanowires.
[0024] The second step is to anneal the alumina template loaded with zinc nanowires in the air environment. The annealing specification is to heat from room temperature to 320°C for 20 minutes, and after 35 hours of heat preservation, it is cooled to room temperature with the furnace. This process makes the zinc nanowires into ZnO nanowires.
[0025] The third step is to perform secondary annealing on the aluminum oxide template loaded with zinc oxide nanowires in the air. The annealing specification is to heat from room temperature to 650° C. for 20 minutes, keep it warm for 1.5 hours, and then cool to room temperature with the furnace. During this heating and heat preservation process, a solid-state diffusion reaction occurs at the interface between alumina and zinc oxide to form a zinc aluminate layer.
[0026] The fourth step is to remove ...
Embodiment 3
[0028] The Y-shaped alumina template was prepared by the secondary anodization method (see J.Li, C.Papadopoulos, and J.Xu.Nature, 1999, 420: 253-254 for details), the electrolyte was 0.3mol oxalic acid solution, and the secondary oxidation When, anodizing voltage 50V, 2 hours, 35V, 9 hours. When spraying gold on the main rod end of the alumina template and electrodepositing Zn nanowires, the electrolyte solution is the same as the solution in Example 1, the electrodeposition voltage: 2V, and the deposition time: 60 minutes. The twice annealing process and the template removal process are the same as in Example 1. In this example, zinc oxide composite nanotubes with zinc aluminate in the inner layer and outer layer with Y-shaped bifurcations were obtained.
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