Rubidium ions doped nanometer titania photocatalyst and preparation method thereof

A nano-titanium dioxide and photocatalyst technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve unfavorable practical applications, high cost of metal ion doping preparation , No problems such as photocatalyst preparation have been seen, and the effect of easy operation, easy access to raw materials, and refined grains has been achieved.

Inactive Publication Date: 2014-01-01
NANTONG UNIVERSITY
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  • Abstract
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Problems solved by technology

[0005] Although metal ions doped TiO 2 There are many research reports, but so far most of the doping elements are concentrated in rare earth metals, transition metals and noble metals. These metal ion doping preparation costs are high, which is not conducive to practical application.
And doping TiO with other metal elements, especially alkali metal elements 2 There are few reports on the research on its photocatalytic performance, and there is no research on rubidium-doped TiO 2 Literature reports on the preparation of photocatalysts

Method used

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  • Rubidium ions doped nanometer titania photocatalyst and preparation method thereof
  • Rubidium ions doped nanometer titania photocatalyst and preparation method thereof
  • Rubidium ions doped nanometer titania photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Slowly add 13.6mL of tetrabutyl titanate dropwise into 51.7mL of absolute ethanol under stirring, then add 8.5mL of glacial acetic acid and Triton X-100, add 0.0472g of rubidium nitrate, and then add 0.952g Polyethylene glycol, continue stirring for two hours to obtain solution A; prepare a mixed solution of double distilled water and absolute ethanol with a volume ratio of double distilled water and absolute ethanol of 1:5, and adjust the pH value with 1:1 hydrochloric acid 2~3 to obtain solution B; slowly add 24mL of solution B to solution A under stirring, continue to stir for two hours after the addition is complete, then stand at room temperature and naturally age to gel. Pour the gel into a crucible, put it in an oven and dry it at 100°C, grind the dry gel into powder, put it in a muffle furnace, heat up to 450°C for 2.5 hours according to the program of 5°C / min, and then naturally Cool to room temperature, take out and grind to get rubidium ion-doped nano-TiO wit...

Embodiment 2

[0027] This embodiment is different from Example 1 in that: the calcination temperature is 550° C., and the others are the same as Example 1.

Embodiment 3

[0029] This embodiment is different from Example 1 in that: the calcination temperature is 650° C., the calcination time is 2 hours, and the others are the same as Example 1.

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Abstract

The invention discloses a rubidium ions doped nanometer titania photocatalyst and a preparation method thereof. The rubidium ions doped nanometer titania photocatalyst is characterized in that moderate rubidium ions are doped to titania lattices, and a corresponding preparation method is carried out to generate a trap for capturing a photon-generated carrier, in order to promote the effective separation of photoproduction electrons and holes, and simultaneously the light response range is expanded into a visible region, and as a result, the photocatalytic activity of titania and the effect of degrading organic wastewater can be effectively improved. The preparation method is simple in process; the conditions are easily controlled; the production cost is low; mass production can be carried out conveniently.

Description

technical field [0001] The invention relates to a rubidium ion-doped nano titanium dioxide photocatalyst and a preparation method thereof. Background technique [0002] Nano-TiO 2 As a method of water treatment, photocatalytic oxidation technology has attracted extensive attention, and the research in this field is very active. However, titanium dioxide itself also has defects. First, photogenerated electrons and holes are easily recombined, resulting in a decrease in photon quantum efficiency and photocatalytic activity; secondly, TiO 2 With a wide band gap (3.2eV), it can only be activated by ultraviolet light below 387 nm, which limits its use of sunlight; therefore, how to treat TiO 2 Modification can effectively reduce the recombination of photogenerated electron-hole pairs and improve the TiO 2 Photocatalytic activity and efficiency, extended TiO 2 Spectral response amplitude has become a research hotspot. [0003] Metal ion doping is considered to be TiO 2 One o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04C02F1/30
Inventor 景晓辉程海军丁欣宇施磊缪勤华曹宇锋
Owner NANTONG UNIVERSITY
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