Three-dimensional SnO2 nano flower-like material grown on titanium substrate and preparation method thereof

Abstract

The invention discloses a three-dimensional SnO2 nano flower-like structural material grown on a titanium substrate and a preparation method thereof. Tetrachlorostannane pentahydrate and sodium hydroxide in a molar ratio of 1:3-16 are used as raw materials to grow the three-dimensional SnO2 nano flower-like structural material on the titanium substrate. The nano flower-like structural material has a simple preparation process and large specific surface area; and the preparation process can simplify preparation method of electrode, and is stable to acid and alkaline environment, and suitable for the fields of dye-sensitized solar cell, photocatalyst, gas sensor, capacitor and lithium ion battery.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage materials, in particular to a three-dimensional SnO grown on a metal titanium substrate 2 Nano flower-like material and its preparation method. Background technique [0002] SnO 2 It is an environmentally friendly n-type semiconductor with a band gap of 3.6eV. It has very excellent chemical, photoelectric, gas sensing, optical and electrochemical properties, and is a multifunctional material with very promising application prospects. SnO 2 It has huge application value and market potential in photocatalysts, gas sensors, capacitors and lithium-ion batteries, and has been widely concerned by countries all over the world. [0003] In order to make the material obtain better performance, people use SnO 2 Prepared into nanomaterials with various morphologies, according to literature reports SnO 2 Nanosheets, nanotubes, nanorods, nanowires, and nanobelts with high specific surface ar...

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Problems solved by technology

[0004]Growing SnO2nanomaterials directly on the metal substrate can avoid the appeal problem, but currently the growth of SnOon the substrate 2 The research on nanomaterials is less, mainly the following main representatives: S.Ghosh et al. (S.Ghosh, K.Das, K.Chakrabarti, et al, Template free synthesis of SnO2 sub> nanoflower arrays on Sn foil[J]. CrystEngComm, 2012, 14:929-935) grew poppy-like SnO2 nanoflowers on tin metal sheets by solvothermal method, but due to the metal tin It is unstable in acid and alkali and limits its practical application; A.C.Chen et al. ) by spraying dibutyl tin dilaurate on the titanium metal sheet, and then thermally decomposing dibutyl tin dilaurate on the titanium metal sheet by thermal decomposition method (350 ℃) to prepare Sn nanoflowers first, and then at high temperature ( 500℃) to generate SnO2 nanoflowers. The nanoflowers are unevenly distributed on the titanium substrate, and the flowers are large in size with a diameter of about 100 microns. Relatively speaking, the specific surface area of ​​the material is small. Therefore, the contact area between the material and the reaction substance will be reduced, thereby affecting the material performance, and the material grown by this method of spraying is not stable in combination with the substrate. Since the entire preparation process needs to be carried out at a higher temperature, the preparation method is complicated. The equipment requirements are also high; T.Tsuchiya et al. (T.Tsuchiya, K.Daoudi, I.Yamaguchi, et al.Preparation of tin oxide films on various substrates by excimer laser metal organic deposition[J].Applied Surface Science, 2005 , 247:145-150) prepared SnO2 films on various substrates (single crystal silicon substrate, sapphire substrate, strontium titanate and TiO2 substrates), it was found that on different substrates, the growth directions of SnO2 films were different, and the films grown at the same time were not single crystal SnO2, but polycrystalline, single crystal The entire crystal lattice is continuous and has important industrial applications. For example, in lithium-ion batteries, the ordered crystal faces of single crystals are more conducive to the insertion and extraction of lithium ions, thereby improving battery performance. Therefore, the polycrystalline SnO2 Membranes are difficult to popularize and apply

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