A butoxy-modified tio2 single crystal hollow square nanocone material, preparation method and application thereof
A hollow square and nano-cone technology, applied in luminescent materials, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems affecting photocatalytic activity and photogenerated charge transfer behavior in interface regions, etc., and achieve high photoelectric conversion efficiency , Environmentally friendly process preparation, good stability
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Embodiment 1
[0035] A butoxy-modified TiO 2 The preparation method of single crystal hollow tetragonal nanocone material comprises the following steps:
[0036] (1) Take 40mg of pure TiO 2 Add the single crystal hollow square nanocone material into 30mL of ethylene glycol, disperse evenly by ultrasonication for 10min, add 0.2mL tetrabutyl titanate dropwise, and stir evenly to obtain a dispersion.
[0037] (2) The above-mentioned dispersion liquid was heated and reacted at a temperature of 60° C., and the reaction time was 30 minutes. After the reaction was completed, it was naturally cooled to room temperature. The product is collected by centrifugation, washed with deionized water for 3-5 times, then washed with absolute ethanol for 3-5 times, and finally dried in a vacuum oven at 60°C for 6-12 hours.
[0038] The TiO 2 The preparation method of single crystal hollow tetragonal nanocone material is:
[0039] (1) Add 5 mL of 1,6-hexanediamine into 25 mL of cyclohexane, followed by 1 mL...
Embodiment 2
[0045] A butoxy-modified TiO 2 Application of single crystal hollow tetragonal nanocone material in visible light catalytic degradation of organic dyes.
[0046] The butoxy-modified TiO prepared above 2 Take 10 mg of the single crystal hollow square nanocone and add it to 100 mL of 0.01 mmol / LRhB solution. After ultrasonication for 1-2 min, place it in a dark place and stir for 1 h, so that the surface of the catalyst reaches adsorption-desorption equilibrium. Afterwards, use a 300W xenon lamp (with a filter to make λ>420nm) irradiate. Take 3mL samples with a centrifuge tube every 5min, centrifuge (10000rpm, 2min), take the supernatant, and measure the absorption spectrum of the solution using a UV-Vis spectrophotometer (Shimadzu UV-2550). The concentration of RhB was determined by the characteristic absorption peak at 554nm. The UV absorption spectrum of the photocatalytic degradation of RhB is as follows Figure 5 As shown, the change curve of concentration with time dur...
Embodiment 3
[0048] A butoxy-modified TiO 2 Single crystal hollow tetragonal nanocones for visible light photoelectric conversion applications.
[0049] The butoxy-modified TiO prepared by the present invention 2 5 mg of single crystal hollow square nanocone material is ultrasonically dispersed in 1 mL of deionized water, and 0.01 mL of the dispersed liquid is dropped on an area of 0.28 cm 2 on the FTO glass. Afterwards, put the FTO glass into a drying oven, and dry it at 80° C. for 30 minutes. A standard three-electrode system was used for photoelectrochemical testing, with catalyst-loaded FTO glass as the working electrode, platinum wire and Ag / AgCl electrode as the auxiliary electrode and reference electrode, respectively. With a concentration of 0.2mol / L Na 2 SO 4 and 10 -5 mol / L RhB mixed solution is the electrolyte. The photoelectric conversion was tested by an electrochemical workstation (CHI660B), using a 300W xenon lamp (plus filter λ>420nm) as the light source. Scan vol...
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