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Preparation method and application of cotton-fiber-like TiO2 loaded with Pt nanoparticles

A cotton fiber and titanium dioxide technology is applied in the field of preparation of composite photocatalysts, which can solve the problems of slow charge transfer speed, small interfacial area of ​​Schottky junctions of composite photocatalysts, and single electron transfer path.

Active Publication Date: 2018-07-27
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is in order to solve the TiO prepared by existing method 2 / Pt composite photocatalyst Schottky junction interface area is small, the electron transport path is single, the charge transport speed is slow, and the charge separation efficiency is low, and a preparation method of cotton fibrous titanium dioxide loaded with platinum nanoparticles and its application

Method used

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  • Preparation method and application of cotton-fiber-like TiO2 loaded with Pt nanoparticles
  • Preparation method and application of cotton-fiber-like TiO2 loaded with Pt nanoparticles
  • Preparation method and application of cotton-fiber-like TiO2 loaded with Pt nanoparticles

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specific Embodiment approach 1

[0014] Specific embodiment one: the preparation method of a cotton fibrous titanium dioxide loaded with platinum nanoparticles in this embodiment is specifically carried out according to the following steps:

[0015] 1. Put the absorbent cotton in absolute ethanol and stir for 5min to 15min, and then drop NH with a mass fraction of 25% to 28% 3 ·H 2 O, after ultrasonication for 10min-20min, add tetrabutyl titanate under the condition of stirring to obtain a mixed solution; place the mixed solution in a water bath at 35°C-50°C and stir for 8h-16h, take out the absorbent cotton from the mixed solution, First wash with ethanol for 3 to 5 times, then wash with deionized water for 3 to 5 times, then dry at a temperature of 40°C to 60°C for 8h to 16h to obtain dry cotton, and place the dry cotton in a muffle furnace Calcined at a temperature of 450°C to 550°C for 3h to 6h to obtain a white powder; the volume ratio of the absorbent cotton to absolute ethanol is 1g:(300 to 350)mL; th...

specific Embodiment approach 2

[0017] Embodiment 2: This embodiment differs from Embodiment 1 in that in Step 1, the mixed solution is placed in a water bath at 45° C. and stirred for 12 hours. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the drying is carried out at a temperature of 50° C. for 12 hours. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method and an application of a composite photocatalyst, in particular to a preparation method and an application of cotton-fiber-like TiO2 loaded with Pt nanoparticles and aims to solve the problems of small Schottky junction interface area, single electronic transmission path, low charge transfer speed and low charge separation efficiency of TiO2 / Pt composite photocatalysts prepared with existing methods. The method comprises the steps as follows: cotton fiber is used as a template, two-dimensional fold-like TiO2 is prepared, and Pt nanoparticles are deposited on the surface of TiO2. The cotton-fiber-like TiO2 loaded with Pt nanoparticles is used for production of hydrogen through photocatalysis.

Description

technical field [0001] The invention relates to a preparation method and application of a composite photocatalyst. Background technique [0002] Energy and environmental issues are eternal topics on the road to green and sustainable development, and are also the most challenging research topics in the world today. At present, the direct conversion of solar energy into chemical energy has been regarded as the key to solving the above problems. Hydrogen energy is one of the most potential green and clean energy sources that can replace traditional energy sources (petroleum, coal, etc.). Therefore, photocatalytic reactions capable of generating hydrogen energy have attracted more and more attention. Titanium dioxide (TiO 2 ) as a photocatalyst with the most practical application value has received great attention and recognition in the past few decades. Undoubtedly, TiO 2 There are still considerable development prospects in the field of photocatalysis. However, most of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J35/06C01B3/02
CPCC01B3/02B01J23/42B01J35/39B01J35/58
Inventor 于洪文郭娜
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S