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Ag-TiO2 nano fiber as well as preparation and application thereof

A nanofiber and glass fiber technology, applied in the application field of catalysts, can solve the problems of low utilization rate of visible light, easy recombination of electrons and holes, etc., and achieve the effect of improving photocatalytic hydrogen production capacity, process controllable, and inhibiting separation

Inactive Publication Date: 2016-09-28
武汉汉缘和环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention provides a Ag-TiO 2 Nanofibers solve the problems of low utilization of visible light by photocatalytic reduction and easy recombination of electron-hole pairs in existing methods, and the Ag-TiO of the present invention 2 Nanofiber catalyst has high catalytic activity and simple synthesis method

Method used

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  • Ag-TiO2 nano fiber as well as preparation and application thereof
  • Ag-TiO2 nano fiber as well as preparation and application thereof
  • Ag-TiO2 nano fiber as well as preparation and application thereof

Examples

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preparation example Construction

[0043] Ag-TiO of the present invention 2 The preparation method of nanofiber includes the following steps:

[0044] (1) Sol-gel method: Dissolve tetrabutyl titanate, PVP, and acetic acid in absolute ethanol, stir evenly to make light yellow solution A, then dissolve a certain amount of silver nitrate in deionized water at room temperature, and stir evenly Make solution B. Drop solution B into solution A drop by drop at room temperature, and continue stirring until a transparent yellow solution with a certain viscosity is formed;

[0045] (2) Electrospinning method: Ultrasound the solution prepared in step (1), and then inject it into a 5ml syringe. Use a stainless steel needle with an inner diameter of 0.7mm to push the syringe at 0.2 / min. The distance between the needle and the receiving board is 15cm, and the voltage is 16kv. Finally, Ag-TiO with a diameter of 80-100um is spun 2 Nanofibers are calcined at a temperature of 440°C.

[0046] The calcination time in step (2) is 2 hou...

Embodiment 1

[0051] Example 1 Prepared 1% Ag-TiO 2 Nanofiber (Ag in Ag-TiO 2 (The mass percentage of nanofibers is 1%)

[0052] Such as figure 1 As shown, the resulting 1% Ag / TiO 2 Electronic scanning transmission image of nanofibers, the average diameter of nanofibers is 56.55nm.

Embodiment 2

[0053] Example 2 Prepared 2% Ag / TiO 2 Nanofiber (Ag in Ag-TiO 2 The mass percentage of nanofibers is 2%)

[0054] Such as figure 2 As shown, the resulting 2% Ag / TiO 2 Electronic scanning transmission image of nanofibers, the average diameter of nanofibers is 66.53nm.

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Abstract

The invention discloses Ag-TiO2 nano fiber as well as preparation and application thereof. The preparation method of the Ag-TiO2 nano fiber is characterized by comprising the following steps: 1) performing a sol-gel method, namely, dissolving titanate, PVP and acetic acid in absolute ethyl alcohol so as to prepare a solution A; dissolving silver nitrate in deionized water so as to prepare a solution B; adding the solution B into a solution A so as to obtain a mixed solution; (2) performing electrostatic spinning method, namely, adding the mixed solution obtained in step (1) into an injector of an electrostatic spinning instrument, and spinning so as to obtain the Ag-TiO2 nano fiber; (3) calcining the Ag-TiO2 nano fiber obtained in the step (2) at 400-500 DEG C, thereby obtaining the Ag-TiO2 nano fiber. The preparation method of the Ag-TiO2 nano fiber disclosed by the invention is simple in device, low in spinning cost, rich in spinnable substance morphology, controllable in process and the like.

Description

Technical field [0001] The invention belongs to the field of chemical industry and environment, and specifically relates to an Ag-TiO 2 Nanofiber, its preparation and its use as photocatalytic reduction of CO in oxygen-enriched combustion flue gas 2 Application of the catalyst. Background technique [0002] In recent years, the atmospheric CO caused by human production activities 2 The increase in concentration has accelerated the impact of the greenhouse effect on the global climate. How to effectively control CO 2 Emissions have become a top priority for all countries. Coal combustion is CO 2 The main source of emissions, currently reducing coal-fired CO 2 There are three main technical routes for emissions: separating carbon before combustion and capturing CO after combustion 2 And oxygen-enriched combustion; from the perspective of technical acceptance and economic analysis with existing coal-fired power stations, oxy-fuel combustion technology is considered to be the most co...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J21/06B01J35/06B01J19/12B01J19/24C07C1/12C07C9/04
CPCB01J19/123B01J19/2475C07C1/12B01J21/063B01J23/50C07C2523/50C07C2521/06B01J35/58B01J35/39C07C9/04
Inventor 赵永椿李湧李志慧
Owner 武汉汉缘和环保科技有限公司
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