High-purity TiO2 mesoporous nano fiber loaded with Ag

A nanofiber, high-purity technology, applied in the field of inorganic semiconductor photoelectric materials, can solve the problems of composite materials that cannot be effectively utilized, low specific surface area, poor stability, etc., to achieve enhanced photocatalytic performance, high sensitivity, and stable quality Effect

Inactive Publication Date: 2015-11-11
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been a lot of research work on Ag-modified TiO 2 have been reported, but existing preparation methods synthesized Ag-loaded TiO 2 Photocatalysts are often nano-powder structures, which still have defects such as low specific surface area and poor stability, making Ag-loaded TiO 2 The superiority of composite materials cannot be effectively utilized

Method used

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  • High-purity TiO2 mesoporous nano fiber loaded with Ag
  • High-purity TiO2 mesoporous nano fiber loaded with Ag
  • High-purity TiO2 mesoporous nano fiber loaded with Ag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Weigh 0.7g of polyvinylpyrrolidone (PVP) and 4.0g of butyl titanate (TBOT) and dissolve them in a mixture of 7ml of absolute ethanol and 3ml of glacial acetic acid, stir and mix at room temperature for 10 hours, then add 0.4g of azodicarboxylate Isopropyl ester (foaming agent, DIPA) was continuously stirred for 1 hour to obtain a precursor spinning solution. After the spinning solution was left to stand, 6ml was measured and injected into a plastic needle tube, and placed on a micro-injection pump, and the injection speed was set at 1ml / h. The metal needle was used as the electrospinning anode, and the barbed wire was used as the cathode of the receiving material. The distance between the anode and the cathode was 20 cm. Electrospinning was performed at a high voltage of 15kV to prepare organic precursor fiber materials. Then the organic precursor fiber material is placed in a 60°C constant temperature oven to obtain a solid organic precursor fiber ( figure 1 and fig...

Embodiment 2

[0054] TiO 2 The preparation of all mesoporous nanofibers is the same as in Example 1, and the prepared TiO 2 Fully mesoporous nanofibers were dispersed in 50 ml of deionized water, followed by about 2.0 g of AgNO 3 Added to the above suspension to make Ag + The concentration is 0.24mol / L, under the condition of continuous stirring, the light is irradiated for 2h, after centrifugation, filtration and drying, the Ag-loaded TiO 2 Scanning electron microscopy (SEM) images of mesoporous nanofibers at different magnifications and magnifications are shown in Figure 11 and Figure 12 shown. Figure 11 The illustration in is the particle size distribution diagram of Ag nanoparticles, and the analysis and calculation shows that the average particle size is 42.8nm. Figure 13 Loading TiO for Ag 2The energy spectrum (EDS) of all mesoporous nanofibers is mainly composed of Ti, O and Ag elements, and the atomic ratio of Ag elements is 1.26at%; the results of Comparative Example 1 sh...

Embodiment 3

[0057] TiO 2 The preparation of all mesoporous nanofibers is the same as in Example 1, and the prepared TiO 2 Fully mesoporous nanofibers were dispersed in 50 ml of deionized water, followed by about 3.0 g of AgNO 3 Added to the above suspension to make Ag + The concentration is 0.36mol / L, under the condition of continuous stirring, the light is irradiated for 2h, after centrifugation, filtration and drying, the Ag-loaded TiO 2 Scanning electron microscopy (SEM) images of mesoporous nanofibers at different magnifications and magnifications are shown in Figure 14 and Figure 15 shown. Figure 14 The illustration in is the particle size distribution diagram of Ag nanoparticles. According to analysis and calculation, the average particle size is 68.9nm. Figure 16 Loading TiO for Ag 2 The energy spectrum (EDS) of all mesoporous nanofibers is mainly composed of Ti, O and Ag elements, and the atomic ratio of Ag elements is 2.14at%; the results of comparative example one and ...

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Abstract

The invention discloses a high-purity TiO2 mesoporous nano fiber loaded with Ag. Main composition elements of the high-purity TiO2 mesoporous nano fiber are Ti, O, and Ag, wherein Ti and O mainly exist in the high-purity TiO2 mesoporous nano fiber in the form of TiO2, and Ag is a doping element; the high-purity TiO2 mesoporous nano fiber possesses a porous structure; and the porous structure possesses mesoporous. A preparation method is simple; production is convenient; product quality stability is excellent; catalytic efficiency of the high-purity TiO2 mesoporous nano fiber in water photolysis is high; and performance is stable.

Description

technical field [0001] The invention relates to an inorganic semiconductor optoelectronic material, especially high-purity Ag-loaded TiO 2 Fully mesoporous nanofibers. Background technique [0002] TiO 2 It has the advantages of stable chemical properties, non-toxicity, and rich sources of raw materials, and is widely used in many fields such as environmental protection, chemical industry, electrical appliances, solar cells, and medicine. where TiO 2 The application of materials in photocatalytic technology is one of the current research hotspots, such as the use of TiO 2 The photocatalytic activity degrades organic pollutants in water, sterilizes, and produces hydrogen by photolysis of water. However, pure phase TiO 2 The photogenerated electron-hole pairs generated during the photocatalytic reaction of the material are very easy to recombine, and the photocatalytic efficiency is low. In view of this, researchers have used many methods to modify it, among which by add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50
Inventor 杨为佑侯慧林尚明辉
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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