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Sulfur-doped titanium dioxide nano-tube film loading indium-zinc-silver-sulfide solid solution, its preparation method and application

A technology of titanium dioxide and indium zinc sulfide, which is applied in chemical instruments and methods, catalysts for physical/chemical processes, hydrogen production, etc., can solve the problems that indium zinc sulfide silver solid solution is difficult to immobilize, and it is difficult to realize sulfide ion doping, etc. Simple and easy preparation method

Active Publication Date: 2011-10-19
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a sulfur-doped titanium dioxide nanotube film loaded with indium-zinc-silver sulfide solid solution, its preparation method and application, so as to solve the problem that the existing indium-zinc-silver sulfide solid solution is difficult to immobilize and it is difficult to realize on the titanium dioxide nanotube film The problem of doping of sulfide ions has realized the immobilization of indium zinc silver sulfide solid solution and the doping of sulfur on titanium dioxide, and obtained a new photocatalytic composite material with good photocatalytic water splitting hydrogen production performance, and the preparation process simple and easy

Method used

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  • Sulfur-doped titanium dioxide nano-tube film loading indium-zinc-silver-sulfide solid solution, its preparation method and application
  • Sulfur-doped titanium dioxide nano-tube film loading indium-zinc-silver-sulfide solid solution, its preparation method and application
  • Sulfur-doped titanium dioxide nano-tube film loading indium-zinc-silver-sulfide solid solution, its preparation method and application

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specific Embodiment approach 1

[0013] Specific embodiment one: this embodiment is a sulfur-doped titanium dioxide nanotube film loaded with indium zinc-silver sulfide solid solution, which is based on a titanium sheet, and a cubic phase sphalerite structure diffraction peak appears at the 28.35° position of the X-ray diffraction spectrum. A pair of O-Ti-S signal peaks appear at the positions of 163.78eV and 164.96eV in the X-ray photoelectron spectrum of S2p, and the Raman spectrum is at 337cm -1 A appears at the Raman shift 1g Mode Ti-S bond Raman vibration peaks.

[0014] The sulfur-doped titanium dioxide nanotube film loaded with indium zinc-silver sulfide solid solution in this embodiment is abbreviated as ZnS-In 2 S 3 -Ag 2 S@TiO 2 NTs film.

[0015] ZnS-In of the present embodiment 2 S 3 -Ag 2 S@TiO 2 Scanning electron micrographs of NTs films, such as figure 1 As shown, the surface of the sulfur-doped titanium dioxide nanotube film is loaded with acicular indium-zinc-silver sulfide solid solu...

specific Embodiment approach 2

[0022] Specific embodiment two: this embodiment is the preparation method of the sulfur-doped titanium dioxide nanotube thin film loaded with indium zinc silver sulfide solid solution as described in specific embodiment one, and it is realized through the following steps: 1. Adopt anodic oxidation method on titanium Prepare the titanium dioxide nanotube film on the chip; 2. Put the titanium dioxide nanotube film prepared in step 1 into the reaction kettle, then put the reaction solution into the reaction kettle, make the reaction solution submerge the titanium dioxide nanotube film, and then add the titanium dioxide nanotube film to the reaction solution Pass the inert gas for 10-30 minutes, then seal the reaction kettle; 3. Place the sealed reaction kettle in step 2 at 160-200°C, keep it warm for 10-20 hours, then cool to room temperature, take out the titanium dioxide nanotube film, and carry out Cleaning and drying, that is, the preparation of the sulfur-doped titanium dioxi...

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the specific steps of step one are: pretreating the titanium sheet to remove the surface oxide film, and then placing the pretreated titanium sheet in the electrolyte as a working electrode , the copper sheet is used as the counter electrode, the reaction voltage is controlled at 10-30V, and the constant-voltage anodization is carried out for 20-120 minutes, that is, the titanium dioxide nanotube film is obtained on the titanium substrate, and the electrolyte composition is: 5-6g / L NaF and volume Concentration of 2% to 5% H 3 PO 4 solution, the solvent is water. Other steps and parameters are the same as in the second embodiment.

[0025] The scanning electron micrograph of the titanium dioxide nanotube thin film prepared by the present embodiment is as follows Image 6 as shown,

[0026] In this embodiment, the specific operation of pretreating the titanium sheet t...

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Abstract

The invention relates to a titanium dioxide nano-tube film loading a photocatalyst, its preparation method and application, solving the problem of hard immobilization of present indium-zinc-silver-sulfide solid solution. The product is obtained by the following steps: preparing a titanium dioxide nano-tube film by anodic oxidation, loading indium-zinc-silver-sulfide solid solution on the titaniumdioxide nano-tube film by solvothermal synthesis and doping sulfur in a titanium dioxide crystal lattice, used as a photocatalyst for photocatalytic hydrogen production by water decomposition. According to the invention, the immobilization of indium-zinc-silver-sulfide solid solution and the doping of sulfur in titanium dioxide are realized, so as to obtain a novel photocatalytic composite material with good performance of photocatalytic hydrogen production by water decomposition, and the preparation technology is easy to operate. When the photocatalytic time reaches 240min, the hydrogen producing capacity of the product is 1.5 times that of the titanium dioxide nano-tube film without loading the solid solution.

Description

technical field [0001] The invention relates to a titanium dioxide nanotube film loaded with photocatalyst, its preparation method and application. Background technique [0002] Since the Honda-Fujishima effect was reported, various photocatalysts for photocatalytic water splitting to produce hydrogen have been reported successively, and in the past decades, many efforts have been made to extend the response range of photocatalysts to visible light. Recently reported solid solution photocatalysts such as (AgIn) x Zn 2(1-x) S 2 , ZnS-CuInS 2 -AgInS 2 , ZnS-In 2 S-Ag 2 S, Cd 1-x Zn x S, (CuIn) x Zn 2(1-x) S 2 , ZnS-In 2 S-CuS, etc., show excellent photocatalytic activity in the range of visible light due to the properties of controllable band gap and high quantum yield. However, it is difficult to separate and recycle these solid solution nanoparticles during their application. Therefore, the realization of solid solution immobilization is an urgent problem to be ...

Claims

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Application Information

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IPC IPC(8): B01J27/04C01B3/04
CPCY02E60/36
Inventor 姜兆华万浩姚忠平贾方舟刘云夫
Owner HARBIN INST OF TECH
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