Silver nanorod and titanium dioxide composite material as well as preparation method and application thereof

A technology of silver nanorods and titanium dioxide, which is applied in the field of photocatalytic materials, can solve the problems of insufficient utilization, limited enhancement, and low concentration of pollutants, so as to increase the utilization of solar spectrum, improve photocatalytic activity, and increase contact area Effect

Active Publication Date: 2017-12-15
JIANGSU ANNATAI ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still has many problems in the degradation of organic pollutants in the gas phase: First, under the traditional liquid-phase photocatalytic conditions, the concentration of pollutant molecules is relatively high, and these pollutant molecules interact with the photocatalyst through random motion. contact and degrade on its surface, but under gas phase condi

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  • Silver nanorod and titanium dioxide composite material as well as preparation method and application thereof
  • Silver nanorod and titanium dioxide composite material as well as preparation method and application thereof
  • Silver nanorod and titanium dioxide composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Disperse 0.875 mg of silver nanorods in 30 ml of ethanol, and ultrasonically disperse for 30 minutes to obtain a uniform, stable and good dispersion of silver nanorods. Add 1.5 ml of tetrabutyl titanate to the dispersion, continue stirring, and then add dropwise 1ml of deionized water, continue to stir for 20 minutes, after fully stirring, transfer to a 50ml reactor, in an oven at 160℃, 10h, then centrifuged, washed, and dried to obtain the silver nanorod-titanium dioxide composite powder. The weight ratio is 0.25%.

[0037] Take 0.2g of silver nanorod-titanium dioxide powder, add 2g of absolute ethanol and ball mill for 24h to obtain the silver nanorod-titanium dioxide ethanol dispersion, scrape it on a 5cm*10cm glass plate, and dry it naturally to obtain silver nanorods- Titanium dioxide coating, the quality control of the coating is 0.1g.

Example Embodiment

[0038] Example 2

[0039] Disperse 1.75mg of silver nanorods in 30ml of ethanol, and ultrasonically disperse for 30 minutes to obtain a uniform, stable and good dispersion of silver nanorods. Add 1.5ml of tetrabutyl titanate to the dispersion, continue to stir and add dropwise 1ml of deionized water, continue to stir for 20 minutes, after fully stirring, transfer to a 50ml reactor, in an oven at 160℃, 10h, then centrifuged, washed, and dried to obtain silver nanorod-titanium dioxide composite powder, including silver nanorods The weight ratio is 0.5%.

[0040] Take 0.2g of silver nanorod-titanium dioxide powder, add 2g of absolute ethanol and ball mill for 24h to obtain the silver nanorod-titanium dioxide ethanol dispersion, scrape it on a 5cm*10cm glass plate, and dry it naturally to obtain silver nanorods- Titanium dioxide coating, the quality control of the coating is 0.1g.

Example Embodiment

[0041] Example 3

[0042] Disperse 2.625mg of silver nanorods in 30ml of ethanol for 30 minutes by ultrasonic dispersion to obtain a uniform, stable and good dispersion of silver nanorods. Add 1.5ml of tetrabutyl titanate to the dispersion, continue to stir and add 1ml dropwise. Continue to stir for 20min. After fully stirring, transfer to a 50ml reactor, in an oven at 160℃, 10h, then centrifuge, wash, and dry to obtain silver nanorod-titanium dioxide composite powder. The weight ratio is 0.75%.

[0043] Take 0.2g of silver nanorod-titanium dioxide powder, add 2g of absolute ethanol and ball mill for 24h to obtain the silver nanorod-titanium dioxide ethanol dispersion, scrape it on a 5cm*10cm glass plate, and dry it naturally to obtain silver nanorods- Titanium dioxide coating, the quality control of the coating is 0.1g.

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Abstract

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a silver nanorod and titanium dioxide composite material as well as a preparation method and application thereof. The silver nanorod and titanium dioxide composite material comprises silver nanorods and titanium dioxide particles, wherein the titanium dioxide particles are partially grown in situ on the surfaces of the silver nanorods, and the other part of the titanium dioxide particles is dispersed in gaps between the silver nanorods; the weight ratio of the silver nanorods to the titanium dioxide is (0.0025-1):1. The invention provides the silver nanorod and titanium dioxide composite material which can effectively degrade a gaseous pollutant photocatalytically, and the preparation method and application thereof.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a silver nanorod-titanium dioxide composite material and its preparation method and application. Background technique [0002] Titanium dioxide, as an ideal semiconductor material, is widely used in solar cells, photocatalytic hydrogen production, and photocatalytic degradation of organic and inorganic pollutants due to its stable physical and chemical properties, chemical and photocorrosion resistance, non-toxicity, and low cost. But TiO 2 As a wide bandgap semiconductor material, there are still some obvious deficiencies. Its bandgap is too large, so that it has a narrow response range to light, so it can only be excited by ultraviolet light; and ultraviolet light only accounts for 5% of the solar spectrum. Thereby greatly reducing its utilization of solar energy; in addition, TiO 2 The excited electron-hole pairs are prone to recombination, which...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J35/00B01J35/02B01D53/86
CPCB01D53/86B01D2257/70B01D2259/802B01J23/50B01J35/004B01J35/023
Inventor 谢晓峰曾庆龙吕娜王晓史淦生
Owner JIANGSU ANNATAI ENVIRONMENTAL PROTECTION TECH CO LTD
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