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Preparation method of titanium dioxide nanotube arrays modified with boundary sites of pt-loaded sulfur-rich molybdenum disulfide

A nanotube array, molybdenum disulfide technology, applied in the field of photocatalytic degradation of pollutant materials, can solve the problems of low photocatalytic activity, limited application, low utilization rate, etc. Effect

Active Publication Date: 2020-07-24
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, TiO 2 There are still some shortcomings in nanotube arrays, which limit its application in many aspects: (1) TiO 2 The bandgap width of TiO is wide (3.2eV for anatase, 3.0eV for rutile), and can only absorb 3-5% of solar energy (λ2 The recombination rate of photogenerated electron-hole pairs of nanotubes is still high and the photocatalytic activity is low

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  • Preparation method of titanium dioxide nanotube arrays modified with boundary sites of pt-loaded sulfur-rich molybdenum disulfide
  • Preparation method of titanium dioxide nanotube arrays modified with boundary sites of pt-loaded sulfur-rich molybdenum disulfide
  • Preparation method of titanium dioxide nanotube arrays modified with boundary sites of pt-loaded sulfur-rich molybdenum disulfide

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preparation example Construction

[0033] see figure 1 , figure 1 It is a schematic flow chart of the preparation method of the Pt-loaded sulfur-rich molybdenum disulfide boundary site modified titania nanotube array of the present invention. Such as figure 1 As shown, the present invention provides a method for preparing a Pt-loaded sulfur-rich molybdenum disulfide boundary site modified titanium dioxide nanotube array, comprising the following steps:

[0034] Pretreatment of titanium sheet;

[0035] Preparation of TiO by Anodic Oxidation 2 nanotube arrays;

[0036] Hydrothermal preparation of vertically structured sulfur-rich molybdenum disulfide nanosheets / titanium dioxide nanotube arrays;

[0037] Using the sulfur-rich molybdenum disulfide nanosheet / titanium dioxide nanotube array as a working electrode, the Pt wire as a counter electrode, and sulfuric acid solution as an electrolyte, a Pt-loaded sulfur-rich molybdenum disulfide boundary site modification was prepared by cyclic voltammetry. Titanium d...

Embodiment 1

[0057] This implementation case demonstrates a preparation method of a Pt-supported sulfur-rich molybdenum disulfide boundary site modified titanium dioxide nanotube array according to the following steps:

[0058] (1) Pretreatment of titanium sheet and preparation of TiO by secondary anodic oxidation 2 Nanotube array: The titanium sheet substrate was ultrasonically cleaned with acetone, absolute ethanol, and deionized water for 20 minutes in sequence. Take the platinum sheet electrode as the cathode, insert it into the electrolyte solution containing 98v% ethylene glycol (ammonium fluoride 0.5wt%) and 2v% water at the same time, apply a voltage of 50V for anodic oxidation for 1.5h, after the film layer is peeled off by ultrasonic, continue to apply a voltage of 50V Anodized for 6 minutes to produce TiO 2 The nanotube arrays were then heat-treated at 450°C for 2 hours to transform from an amorphous state to anatase with a better crystal form.

[0059] (2) Using hydrothermal ...

Embodiment 2

[0063] This implementation case demonstrates a preparation method of a Pt-supported sulfur-rich molybdenum disulfide boundary site modified titanium dioxide nanotube array according to the following steps:

[0064] (1) Pretreatment of titanium sheet and preparation of TiO by secondary anodic oxidation 2 Nanotube array: The titanium sheet substrate was ultrasonically cleaned with acetone, absolute ethanol, and deionized water for 20 minutes in sequence. Take the platinum sheet electrode as the cathode, insert it into the electrolyte solution containing 98v% ethylene glycol (ammonium fluoride 0.5wt%) and 2v% water at the same time, apply a voltage of 50V for anodic oxidation for 1.5h, after the film layer is peeled off by ultrasonic, continue to apply a voltage of 50V Anodized for 6 minutes to produce TiO 2 The nanotube arrays were then heat-treated at 450°C for 2 hours to transform from an amorphous state to anatase with a better crystal form.

[0065] (2) Using hydrothermal ...

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Abstract

The invention discloses a preparation method of a Pt-loaded sulfur-rich molybdenum disulfide boundary site modified titanium dioxide nanotube array. The preparation method comprises the following steps: firstly, performing cleaning pretreatment to the surface of a substrate material; then, preparing an ethylene glycol solution containing ammonium fluoride and water as an electrolyte, performing electrochemical anodic oxidation on the titanium base material, and placing the titanium base material in a muffle furnace for calcinating; constructing vertically arranged sulfur-rich molybdenum disulfide nanosheets on a TiO2 nanotube array by a hydrothermal method; finally, with a Pt line as a counter electrode, Ag / AgCl as a reference electrode and sulfuric acid as the electrolyte, depositing Pt to a boundary site of a sulfur-rich molybdenum disulfide sheet by electrochemical cyclic voltammetry. The Pt-loaded sulfur-rich molybdenum disulfide boundary site modified titanium dioxide nanotube improves visible light absorption; moreover, a composite material is used for forming a metal-p-n junction, and through loading onto the active boundary site, the electron transport is greatly improved and the organic pollutant degrading ability of visible light is promoted.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation of pollutant materials, in particular to a method for preparing a Pt-supported sulfur-rich molybdenum disulfide boundary site modified titanium dioxide nanotube array. Background technique [0002] Today's society is facing many problems. The sharp increase in energy demand and large-scale environmental pollution are prominent problems facing today's society. Organic dye pollution is the most prominent problem in water pollution today. Titanium dioxide (TiO 2 ) as a new n-type semiconductor material has been widely used in photocatalytic degradation of pollutants, fuel-sensitized solar cells, Biomedical materials, gas sensors, and hydrogen production by photolysis of water provide new ways for the green degradation of organic pollutants. [0003] Nano-TiO 2 In addition to the same surface effect, low size effect, quantum size effect and macroscopic quantum tunneling effect a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26C23C18/12C25D5/50B82Y40/00B01J27/051
CPCB01J27/051B01J35/004B82Y40/00C23C18/12C25D5/50C25D11/26
Inventor 赖跃坤董佳宁张鑫楠黄剑莹
Owner SUZHOU UNIV
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