TNT/CdS/TiO2/Pt core-shell structure nanotube and preparation method thereof

A core-shell structure and nanotube technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as structure and recombination position confusion, complex electron transfer paths, and reduced quantum efficiency. Achieve the effect of short electron transmission distance, improve photocatalytic activity and stability, and less recombination

Active Publication Date: 2019-06-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing titanium dioxide, cadmium sulfide, and platinum ternary photocatalysts have chaotic morphology, structure, and recombination position, and the electron transfer path is relatively complicated. Most of the photogenerated electron-hole pairs will recombine, which reduces the quantum efficiency.

Method used

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  • TNT/CdS/TiO2/Pt core-shell structure nanotube and preparation method thereof
  • TNT/CdS/TiO2/Pt core-shell structure nanotube and preparation method thereof
  • TNT/CdS/TiO2/Pt core-shell structure nanotube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Titanate nanotubes (titanate nanotubes, TNT) preparation: 2.5g commercial TiO 2 Add to 125ml NaOH (10M) aqueous solution, stir for 2 hours, pour into the reaction kettle, react in an oven at 150°C for 4 days, then wash with deionized water, then add the sample to 250ml 0.1M HCL and stir for 2 hours, then Suction-filtered and washed with deionized water, the obtained sample was dried in an oven at 110°C for 24 hours. Then the dried sample was heat-treated at 600° C. for 4 hours to obtain titanate nanotubes (TNT).

[0035] (2) Preparation of CdS quantum dots: Heat 30ml of CdO, 1-octadecene and oleic acid mixture with a concentration of 0.4M to 320°C under the protection of an inert gas, and then add 3ml of tri-n-octyl dissolved in sulfur powder Phosphorus (concentration of S is 4M), keep the temperature at 280°C for 5 minutes. Then the cooled product was dissolved with n-hexane and methanol, then precipitated with acetone, centrifuged at 5000r / min for 5min, and puri...

Embodiment 2～5

[0040] The preparation method of embodiment 2~5 is identical with embodiment 1, just carries out TiO in step (4). 2 The number of cycles during atomic layer deposition was changed from 80 to 10, 20, 40, and 60, respectively.

[0041] The test results of the materials obtained in the above examples are specifically as follows.

[0042] (1) X-ray diffraction analysis (XRD)

[0043] figure 1 Titanate nanotubes (TNT), CdS quantum dots and TNT / CdS / TiO prepared for Example 1 2 XRD patterns of / Pt core-shell nanotubes. from figure 1 It can be seen that the prepared TNT / CdS / TiO 2 The XRD of / Pt core-shell nanotubes has the characteristic peaks of TNT and CdS at the same time, which proves that TNT and CdS are successfully combined.

[0044] (2) Transmission electron microscope analysis (TEM)

[0045] figure 2 For the TNT / CdS / TiO prepared in Example 1 2 / TEM image of Pt core-shell nanotubes.

[0046] (3) High Angle Annular Dark Field Image (HAADF-STEM)

[0047] image 3 T...

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Abstract

The invention discloses a TNT / CdS / TiO2 / Pt core-shell structure nanotube and a preparation method thereof. The nanotube comprises a titanic acid nanotube TNT, a CdS quantum dot, a TiO2 shell layer anda metal Pt in sequence from inside to outside. According to the invention, a titanic acid nanotube carrier (TNT) is prepared by utilizing a hydrothermal method; the CdS quantum dot is prepared by adopting a heat injection method; the CdS quantum dot is loaded by taking the titanic acid nanotube carrier (TNT) as a main body; and a TiO2 shell layer is grown by adopting an atomic layer deposition technology, and Pt is loaded, so that the nanotube with the TNT / CdS / TiO2 / Pt core-shell structure is prepared. The core-shell structure composite material prepared by the invention is regular in structure, ordered in electron transfer path and good in stability, has excellent photocatalytic activity, and is well applied to the aspects of lithium ion batteries, supercapacitors, gas sensing, photocatalysis and the like.

Description

technical field [0001] The invention relates to a core-shell structure nanotube and a preparation method thereof, in particular to a TNT / CdS / TiO 2 / Pt core-shell structure nanotube and its preparation method. Background technique [0002] In recent years, human society is facing two major problems of energy shortage and environmental pollution. Since human society entered the stage of industrialization, industrial pollution emissions and energy consumption have increased rapidly. Therefore, it is of great significance to develop sustainable, environmentally friendly and cheap new energy through the development of science and technology and technological innovation. Solar energy is a non-polluting, sustainable, powerful and universal energy source, and is considered to be the most ideal substitute for fossil energy sources. Nowadays, converting solar energy into other forms of secondary energy (such as electrical energy and chemical energy, etc.) is a research direction th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/045
Inventor 程党国刘慧陈丰秋詹晓力
Owner ZHEJIANG UNIV
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