Bismuth and zinc doped titanium dioxide photocatalyst and preparation method and application thereof

A technology of titanium dioxide and photocatalyst, which is applied in the field of bismuth-zinc-doped titanium dioxide photocatalyst and its preparation, which can solve the problems of low utilization rate of solar energy and achieve the effects of enhanced visible light absorption, good catalytic activity and increased probability

Inactive Publication Date: 2016-07-27
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 Because of its good stability, mild reaction conditions, high catalytic activity, and low price, it has become the most commonly used photocatalyst, but its wide band gap (3.0-3.2eV) can only absorb ultraviolet light, which accounts for only 4% of sunlight. Low utilization rate of solar energy

Method used

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  • Bismuth and zinc doped titanium dioxide photocatalyst and preparation method and application thereof
  • Bismuth and zinc doped titanium dioxide photocatalyst and preparation method and application thereof
  • Bismuth and zinc doped titanium dioxide photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 40.80g of titanyl sulfate, 2.33g of bismuth nitrate and 0.75g of zinc nitrate and dissolve in 582mL of absolute ethanol, and stir at room temperature. Add 290ml of glycerol and 285ml of anhydrous diethyl ether gradually under stirring, stir for 1 hour until the mixture is uniform, then transfer to the synthesis kettle, seal the kettle body, solvoheat at 110°C for 48 hours, filter, and wash with absolute ethanol for 5-6 times , dried at 100°C for 6 hours, and calcined at 500°C for 4 hours in a muffle furnace to obtain the catalyst. The obtained doped photocatalyst contains 1.9% Bi and 1% Zn in terms of moles of titanium dioxide, and the obtained catalyst is marked as TiBi 1.9% Zn 1% o 2 .

Embodiment 2

[0017] In Example 1, the zinc nitrate is changed to 1.50g, and the amount of bismuth nitrate is still 2.33g, i.e. the cost example, marked as TiBi 1.9% Zn 2% o 2 .

Embodiment 3

[0019] In Example 1, the zinc nitrate is changed to 0.00g, and the amount of bismuth nitrate is still 2.33g, i.e. the cost example, marked as TiBi 1.9% o 2 .

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Abstract

The invention discloses a bismuth and zinc doped titanium dioxide photocatalyst and a preparation method thereof.The preparation method of the photocatalyst comprises the steps that titanyl sulfate, bismuth nitrate and zinc nitrate solvents are heated, filtered, washed, dried and calcined.The molar ratio of bismuth to titanium is 0-3%, and the molar ratio of zinc to titanium is 0-5%.The prepared bismuth and zinc doped titanium dioxide photocatalyst achieves visible light absorption within the range of 400 nm to 600 nm, and has good visible light photocatalytic degradation efficiency on gas phase methylbenzene.

Description

technical field [0001] The invention belongs to a photocatalytic material and its preparation method and application, in particular to a bismuth-zinc-doped titanium dioxide photocatalyst for photocatalytically degrading gas-phase organic pollutants and its preparation method and application. Background technique [0002] With the rapid development of modern industrialization and urbanization, while the consumption of resources, especially energy, continues to grow, the problem of regional air pollution is becoming more and more prominent, which directly affects the sustainable development of the economy and society and human health. Therefore, the control and elimination of these volatile organic pollutants (VOCs, Such as formaldehyde, benzene, toluene and xylene, etc.) have important practical significance. Photocatalytic degradation is a new type of organic pollutant treatment technology with broad market prospects. TiO 2 Because of its good stability, mild reaction cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18B01D53/86B01D53/72
CPCB01J35/004B01D53/8668B01D2255/802B01J23/002B01J23/18B01J2523/00B01J2523/54B01J2523/27B01J2523/47
Inventor 贾宏鹏李娟娟
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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