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Rubidium and tungsten co-doped titanium dioxide photocatalytic material and preparation method thereof

A photocatalytic material, titanium dioxide technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of limited photocatalytic performance of titanium dioxide materials, etc. The effect of catalytic degradation performance, easy control of conditions, and simple operation

Pending Publication Date: 2021-07-16
有研资源环境技术研究院(北京)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many studies on the photocatalytic performance of metal rubidium and tungsten doped titanium dioxide, the influence of single metal ion doping on the photocatalytic performance is considered, so the improvement of the photocatalytic performance of titanium dioxide materials is relatively limited.

Method used

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  • Rubidium and tungsten co-doped titanium dioxide photocatalytic material and preparation method thereof
  • Rubidium and tungsten co-doped titanium dioxide photocatalytic material and preparation method thereof
  • Rubidium and tungsten co-doped titanium dioxide photocatalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The specific operation steps for preparing rubidium and tungsten co-doped titania photocatalytic materials are as follows:

[0030] (1) Solution A preparation

[0031] Mix 70mL of absolute ethanol, 10mL of acetic acid and 20mL of deionized water evenly, then add 0.0174g of rubidium nitrate and 0.0388g of sodium tungstate, and start stirring. After they are fully dissolved, add nitric acid drop by drop to adjust the pH value of the mixed solution was 2.0, solution A was prepared.

[0032] (2) Solution B preparation

[0033] Slowly add 20 mL of butyl titanate into 70 mL of absolute ethanol and stir thoroughly to obtain solution B.

[0034] (3) Gel preparation and drying

[0035] Add solution B to solution A dropwise, and control the dropping rate to 0.75 mL / min. After the solution B was added dropwise, it was stirred for 15 min to obtain a gel. The gel was transferred into a watch glass, and placed in a fume hood to age and air-dry at a temperature of 25°C for 48 hou...

Embodiment 2

[0039] The difference between this example and Example 1 is that in step (4), the calcination temperature is 550°C. Others are the same as in Example 1. In the prepared titanium dioxide photocatalytic material co-doped with rubidium and tungsten, the molar doping ratios of rubidium and tungsten are both 0.2%.

Embodiment 3

[0041] The difference between this example and Example 1 is that in step (1), 70mL of absolute ethanol, 10mL of acetic acid and 20mL of deionized water are uniformly mixed, nitric acid is added dropwise, and the pH value of the mixed solution is adjusted to 2.0 to obtain a solution a. Others are the same as in Example 1.

[0042] Characterization of photocatalytic performance of photocatalytic materials

[0043] With reference to the national standard GBT23762-2009 photocatalytic material aqueous solution system purification test method, the photocatalytic effect of the rubidium and tungsten co-doped titanium dioxide material obtained in embodiment 1 and embodiment 2 is evaluated, and compared with the pure titanium dioxide obtained in example 3 comparing. A 10mg / L methylene blue solution was used as the degradation solution for testing the photocatalytic effect, the light source was provided by a 300W xenon lamp, and the catalyst concentration was 1.0g / mL. The concentrat...

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Abstract

The invention discloses a rubidium and tungsten co-doped titanium dioxide photocatalytic material and a preparation method thereof. According to the photocatalytic material, titanium dioxide is doped with rubidium and tungsten elements, and the molar doping ratio of the rubidium and tungsten elements is 0.01%-5.0%. The photocatalytic material is grey white powder. The preparation method comprises the following steps: (1) uniformly mixing absolute ethyl alcohol, acetic acid and deionized water, adding rubidium nitrate and sodium tungstate into the mixture, fully dissolving, and regulating the pH value of the solution to 0.5-7.0 by using nitric acid to obtain a solution A; (2) dissolving butyl titanate in absolute ethyl alcohol of which the volume is equal to that of the absolute ethyl alcohol in the step (1) to obtain a solution B; (3) slowly dropwise adding the solution B into the rapidly stirred solution A, continuously stirring after dropwise adding until gel is formed, and aging and air-drying the gel; and (4) grinding the obtained xerogel into powder, and roasting the powder in a muffle furnace to obtain the rubidium and tungsten co-doped titanium dioxide photocatalytic material.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and relates to a rubidium and tungsten co-doped titanium dioxide photocatalytic material and a preparation method thereof. Background technique [0002] With the excessive exploitation and consumption of traditional energy sources such as oil and natural gas, environmental and energy issues have gradually become the primary issues restricting the current economic and social development. The new energy utilization technology to treat organic wastewater has become the mainstream trend of future development. Photocatalytic technology is the energy conversion storage or direct utilization technology of solar energy by means of a class of materials. This technology has the characteristics of green, clean and low cost. The application of photocatalytic technology in the field of organic wastewater treatment can not only efficiently utilize solar energy to clean energy, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/30B01J35/00B01J37/08C02F101/30
CPCB01J37/088B01J23/30B01J21/063C02F2305/10C02F2101/30B01J35/39
Inventor 孙启纪仲光徐政刘兴宇张明江
Owner 有研资源环境技术研究院(北京)有限公司
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