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Method for preparing graphite phase carbon nitride doped titanium dioxide nanotube array photoelectrode by one-step method

A technology of graphitic carbon nitride and nanotube arrays, which is applied in chemical instruments and methods, oxidized water/sewage treatment, electrolytic coatings, etc., can solve the problems of high preparation cost and shorten the preparation process, and achieve the promotion of charge separation and shorten Effect of preparation process, improvement of quantum efficiency and photoelectric conversion ability

Pending Publication Date: 2021-10-29
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a one-step method for preparing graphite-phase carbon nitride-doped titanium dioxide nanotube array photoelectrodes, aiming at shortening the preparation process and solving the problem of high preparation cost, and at the same time, improving the Photocatalytic performance

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  • Method for preparing graphite phase carbon nitride doped titanium dioxide nanotube array photoelectrode by one-step method
  • Method for preparing graphite phase carbon nitride doped titanium dioxide nanotube array photoelectrode by one-step method
  • Method for preparing graphite phase carbon nitride doped titanium dioxide nanotube array photoelectrode by one-step method

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Embodiment 1

[0032] A method for preparing a titanium dioxide nanotube array photoelectrode doped with graphite phase carbon nitride in one step, specifically comprising the following steps:

[0033] S1: Pretreatment of titanium sheet

[0034] Wash the titanium sheet with hydrofluoric acid to remove the surface oxide layer, and then polish it with 500, 600, 800, 1000, 2000, 5000 mesh sandpaper after rinsing with clean water. Ultrasonic cleaning with water for 2 minutes;

[0035] S2: Preparation of graphitic carbon nitride

[0036] The precursor of graphite phase carbon nitride was calcined at 400°C for 2 hours, put into aqueous solution for ultrasonic dispersion for 2 hours, and freeze-dried;

[0037] S3: Preparation of mixed solution system for anodic oxidation simultaneous deposition process

[0038] Prepare a solution system with a graphite phase carbon nitride concentration of 1 g / L, anhydrous sodium sulfate concentration of 1 mol / L, and sodium fluoride concentration of 0.5 wt%, and...

example 2

[0043] A method for preparing a titanium dioxide nanotube array photoelectrode doped with graphite phase carbon nitride in one step, specifically comprising the following steps:

[0044] S1: Pretreatment of titanium sheet

[0045] Wash the titanium sheet with hydrofluoric acid to remove the surface oxide layer, and then polish it with 500, 600, 800, 1000, 2000, 5000 mesh sandpaper after rinsing with clean water. Ultrasonic cleaning with water for 2 minutes;

[0046] S2: Preparation of graphitic carbon nitride

[0047] The precursor of graphitic carbon nitride was calcined at 550°C for 2 hours, placed in an aqueous solution for ultrasonic dispersion for 2 hours, and freeze-dried;

[0048] S3: Preparation of mixed solution system for anodic oxidation simultaneous deposition process

[0049] Prepare a solution system with a graphite phase carbon nitride concentration of 1 g / L, anhydrous sodium sulfate concentration of 1 mol / L, and sodium fluoride concentration of 0.5 wt%, and st...

Embodiment 3

[0054] A method for preparing a titanium dioxide nanotube array photoelectrode doped with graphite phase carbon nitride in one step, specifically comprising the following steps:

[0055] S1: Pretreatment of titanium sheet

[0056] Wash the titanium sheet with hydrofluoric acid to remove the surface oxide layer, and then polish it with 500, 600, 800, 1000, 2000, 5000 mesh sandpaper after rinsing with clean water. Ultrasonic cleaning with water for 2 minutes;

[0057] S2: Preparation of graphitic carbon nitride

[0058] The precursor of graphite phase carbon nitride was calcined at 500°C for 2h, placed in aqueous solution for ultrasonic dispersion for 2h, and freeze-dried;

[0059] S3: Preparation of mixed solution system for anodic oxidation simultaneous deposition process

[0060] Prepare a solution system with a graphite phase carbon nitride concentration of 1 g / L, anhydrous sodium sulfate concentration of 1 mol / L, and sodium fluoride concentration of 0.5 wt%, and stir and...

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Abstract

The invention discloses a method for preparing a graphite phase carbon nitride doped titanium dioxide nanotube array photoelectrode by a one-step method. The method comprises the following steps: 1, pretreating a titanium sheet; 2, pretreating a carbon nitride precursor; 3, preparing an anodic oxidation synchronous deposition process solution system; and 4, placing a titanium oxide nanotube array photoelectrode in the solution in the step 3, and performing anodic oxidation synchronous deposition by taking a platinum electrode as a counter electrode to obtain a graphite phase carbon nitride doped titanium dioxide nanotube array photoelectrode prepared by a one-step method. In this way, the preparation process steps are saved, and the electrode which is low in cost, good in stability, high in photocatalytic activity, green and free of pollution and has visible light photocatalytic activity can be prepared.

Description

technical field [0001] The invention relates to the field of composite photoelectrode preparation, in particular to a method for preparing graphite-phase carbon nitride-doped titanium dioxide nanotube array photoelectrodes in one step. Background technique [0002] In recent years, semiconductor-based photocatalytic technology has attracted extensive attention due to its excellent properties in the degradation of organic pollutants. TiO 2 It is mainly composed of anatase phase, rutile phase and brookite phase. Anatase TiO 2 Due to its low cost, good chemical stability, non-toxicity, and simple synthesis method, it has good photocatalytic performance. Common semiconducting metal oxides TiO 2 There is a wide bandgap (3.2eV) between the conduction band and the valence band. However, TiO 2 The electron transfer rate is low, which means that the recombination rate of electron-hole pairs is high. Furthermore, due to the limited spectral response under UV light, TiO 2 The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/30C02F1/72C25D9/06C25D11/26
CPCC02F1/30C02F1/46109C02F1/4672C25D11/26C25D9/06C02F2001/46142C02F2305/023
Inventor 辛言君于承泽董雅楠马东崔春月
Owner QINGDAO AGRI UNIV
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