Double-noble-metal-loaded nano titanium dioxide as well as preparation method and application thereof

A technology of nano-titanium dioxide and noble metals, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, separation methods, etc., can solve the role of nano-TiO2 degradation, which is rarely studied, photogenerated carrier migration Slow rate, fast recombination rate, etc., to achieve good photocatalytic stability, high commercial application prospects, and good dispersion

Pending Publication Date: 2022-05-03
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 The bulk still has the problems of slow migration rate of photogenerated carriers and fast recombination rate, so it still needs to be further modified, one of which is to load efficient noble metal cocatalysts
In recent years, people have loaded a single precious metal on TiO 2 Some achievements have been made in the degradation of formaldehyde, but the loading of double noble metal cocatalysts is not effective for nano-TiO 2 The role of degradation has been seldom studied

Method used

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  • Double-noble-metal-loaded nano titanium dioxide as well as preparation method and application thereof
  • Double-noble-metal-loaded nano titanium dioxide as well as preparation method and application thereof
  • Double-noble-metal-loaded nano titanium dioxide as well as preparation method and application thereof

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Embodiment 1

[0033] (1) First prepare nano-TiO by thermal decomposition method 2 :

[0034] First, measure 100ml of water with a measuring cylinder and pour it into a 150ml beaker, and weigh 11.5200g of Ti(SO) 4 Put it into the above-mentioned beaker filled with water and stir it into a uniform aqueous solution, remove the lower layer of clear solution after vacuum filtration, and then slowly add ammonia water dropwise at a rate of 20d / min until the largest precipitate is formed. Wash the precipitate with high-purity water and ethanol for 3-4 times until the upper layer solution is clear, and finally calcinate the obtained precipitate in a muffle furnace at 600°C for 3h (heating rate 5°C / min) to obtain white nano-TiO 2 Powder.

[0035] (2) Second, the preparation of nano-TiO supported by double precious metals 2 catalyst of light:

[0036] Au-Pt / TiO 2 prepared by photoreduction loading. Measure 40ml of deionized water and 10ml of methanol into a beaker and add 100mg of TiO 2 For pow...

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Abstract

The invention discloses a preparation method and application of double noble metal loaded nano titanium dioxide, a substrate material of a catalyst is nano TiO2, and double noble metal particles Au-Pt, Ag-Pt and Ag-Au are loaded on the surface of the substrate material. The preparation method comprises the following steps: firstly, synthesizing nano TiO2 as a carrier by using a thermal decomposition method, and then obtaining products Au-Pt / TiO2, Ag-Pt / TiO2 and Ag-Au / TiO2 in a photo-reduction loading manner. The preparation method is simple and easy to operate, and the synthesized A-B / TiO2 (A, B = Au, Ag and Pt) nanoparticles have high photocatalytic activity and stability and have excellent performance in the aspect of photocatalytic degradation of formaldehyde.

Description

technical field [0001] The invention belongs to the technical field of new energy and photocatalytic materials, and in particular relates to a double noble metal supported nano-titanium dioxide and its preparation method and application. Background technique [0002] Nano-semiconductor photocatalysis technology is an emerging new technology for eliminating environmental pollutants, and it has attracted more and more attention. It uses the principle of photocatalysis to fundamentally eliminate pollutants by photolysis, so it has become the most effective way to eliminate indoor pollutants. effective method. Among many visible light-responsive photocatalytic materials, TiO 2 It is recognized as the best catalyst for photocatalytic reactions. It is widely used because of its wide source, low price, easy preparation, no toxicity, high photocatalytic activity and good stability. Under light conditions, TiO 2 The pollutant formaldehyde can be converted into CO 2 and H 2 O. B...

Claims

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Application Information

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IPC IPC(8): B01J23/48B01D53/86B01J23/50B01J23/52B01J35/02
CPCB01J23/48B01J23/50B01J23/52B01D53/8668B01D2255/802B01J35/39B01J35/40
Inventor 王朋孟婉珍黄柏标王泽岩郑昭科刘媛媛程合锋张倩倩张晓阳
Owner SHANDONG UNIV
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