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A kind of PDO loaded n, b co-doped titania nanotube photocatalyst and preparation method thereof

A titanium dioxide and photocatalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low quantum efficiency and narrow spectral response range, and achieve high catalytic activity and easy influencing factors. Controlled, strong photocatalytic activity

Inactive Publication Date: 2020-09-29
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a PdO loaded N, B co-doped titania nanotube photocatalyst with high photocatalytic activity, by co-doping non-metal and non-metal, and with PdO loaded phase Binding to TiO 2 Nanotubes are modified to solve the problems of narrow spectral response range and low quantum efficiency, thereby significantly improving the utilization rate of visible light and quantum efficiency, which is helpful for photocatalytic and photocatalytic degradation of organic refractory pollutants under sunlight widely used in

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  • A kind of PDO loaded n, b co-doped titania nanotube photocatalyst and preparation method thereof
  • A kind of PDO loaded n, b co-doped titania nanotube photocatalyst and preparation method thereof
  • A kind of PDO loaded n, b co-doped titania nanotube photocatalyst and preparation method thereof

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Embodiment 1

[0034] In this embodiment, a method for preparing a PdO-loaded N and B co-doped titania nanotube photocatalyst, the steps are as follows:

[0035] (1) Preparation of Ti-N alloy sheet

[0036] The method of arc melting-quick cooling is used for preparation. Firstly, a total of 500g of titanium sponge and TiN powder (the amount of TiN powder is 3mol% of the titanium sponge) are mixed, pressed into an electrode block by a hydraulic press, and placed in a consumable electrode. The vacuum electric arc furnace is used as an anode for melting, and the melting parameters are: vacuum degree 2×10 -2 Pa, a voltage of 35V, and a current of 250A to obtain a bulk Ti-N alloy; then cutting and polishing the above-mentioned bulk Ti-N alloy to obtain a Ti-N alloy sheet with a size of 4cm×1cm×0.1cm;

[0037] The above-mentioned Ti-N alloy sheet was pretreated: firstly, it was polished with sandpaper until there was no scratch on the surface, then ultrasonic chemical degreasing with acetone and ...

Embodiment 2

[0051] The preparation method of a kind of PdO loaded N, B co-doped titania nanotube photocatalyst of this embodiment, differs from Embodiment 1 in that:

[0052] In step (1), the amount of TiN powder is 3.5 mol% of the titanium sponge.

[0053] In step (2), the NaBF in the electrolyte 4 The dosage is 0.4wt%, and the oxidation reaction time is 30h.

Embodiment 3

[0055] The preparation method of a kind of PdO loaded N, B co-doped titania nanotube photocatalyst of this embodiment, differs from Embodiment 1 in that:

[0056] In step (2), the NaBF in the electrolyte 4 Its usage is 0.4wt%.

[0057] In step (3), the concentration of palladium ions in the impregnated mixed solution is 0.004mol / L.

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Abstract

The invention discloses a PdO-loaded N, B co-doped titanium dioxide nanotube photocatalyst, the titanium dioxide exists in the form of anatase phase nanotube array; the palladium is loaded on the surface of the titanium dioxide nanotube in the form of PdO, and the The surface atomic concentration of palladium is 0.1-0.2%; the surface atomic concentration of nitrogen is 1.0-2.0%; and the surface atomic concentration of boron is 0.3-0.5%. In addition, the preparation method of the above-mentioned PdO supported N, B co-doped titanium dioxide nanotube photocatalyst is also disclosed. The present invention improves TiO by co-doping non-metals and non-metals and combining it with PdO loading. 2 Modification of nanotubes simultaneously solves the problems of narrow spectral response range and low quantum efficiency, thereby significantly improving visible light utilization and quantum efficiency, which is helpful for photocatalytic and photoelectrocatalytic degradation of organic refractory pollution under sunlight. widely used in materials.

Description

technical field [0001] The invention relates to the technical field of nano titanium dioxide photocatalytic materials, in particular to a PdO loaded N and B co-doped titanium dioxide nanotube photocatalyst and a preparation method thereof. Background technique [0002] Titanium dioxide (TiO) as a photocatalyst 2 ) nanotube array film has become a research hotspot because of its large specific surface area, fast charge transfer, easy recycling and many other advantages. However, at present, the photocatalytic efficiency of titanium dioxide nanotubes is still too low, and it is far from meeting the requirements of practical applications, mainly due to the following two problems: first, the spectral response range is narrow, and TiO 2 The semiconductor has a forbidden band width of 3.2eV, and can only respond to ultraviolet light with a wavelength below 390nm, so the utilization rate of sunlight is relatively low; secondly, the quantum efficiency is low, and TiO 2 The recombi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/02B01J37/34B01J37/08C02F1/30C02F101/38C02F101/30
CPCC02F1/30B01J27/24B01J37/0201B01J37/088B01J37/348C02F2305/10C02F2101/30C02F2101/38B01J35/39
Inventor 王竹梅左建林李月明沈宗洋
Owner JINGDEZHEN CERAMIC UNIV