Perovskite-based nanotube array composite material and preparation method thereof

A technology of nanotube arrays and composite materials, which is applied in the field of nanotube array composite materials and its preparation, can solve the problems of low degradation rate of organic matter, achieve the effects of improved degradation rate, high-efficiency photocatalytic properties, and simple and easy methods

Inactive Publication Date: 2010-07-07
HARBIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is to solve the problem that the existing perovskite-based nano-film photocatalyst has a low degradation rate for organic matter, and the photoca...

Method used

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  • Perovskite-based nanotube array composite material and preparation method thereof
  • Perovskite-based nanotube array composite material and preparation method thereof

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specific Embodiment approach 1

[0014] Embodiment 1: The perovskite-based nanotube array composite material of this embodiment is composed of a titanium metal material sheet, an electrolyte solution, an alkaline earth metal hydroxide aqueous solution with a concentration of 0.025 mol / L to 0.1 mol / L, and a concentration of It is made of 0.05mol / L~3mol / L metal nitrate aqueous solution; the electrolyte solution is prepared according to the ratio of 50mL~200mL ethylene glycol, 1mL~20mL water and 0.1g~2g ammonium fluoride; metal nitrate It is silver nitrate or palladium nitrate.

[0015] The perovskite-based nanotube array composite material of this embodiment has the advantage of immobilizing the catalyst, and has the characteristics of a higher quantum size effect of the nanomaterial due to the size reduction, and exhibits high-efficiency photoelectrocatalytic properties. After 15 minutes of degradation under 350W ultraviolet light, the degradation rate is 30% to 85%, which is 20% to 50% higher than that of the...

specific Embodiment approach 2

[0016] Embodiment 2: This embodiment differs from Embodiment 1 in that the titanium metal material sheet is a titanium-tantalum alloy sheet, a titanium-niobium alloy sheet, a titanium-vanadium alloy sheet or a titanium sheet with a mass purity ≥ 99.0%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0017] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the alkaline earth metal hydroxide is barium hydroxide, strontium hydroxide or calcium hydroxide. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a perovskite-based nanotube array composite material and a preparation method thereof, relating to a nanotube array composite material and a preparation method thereof. The invention solves the problems that the conventional perovskite-based nano-film photocatalyst has low degradation ratio on organic matters, and the perovskite-based nanotube array composite material photocatalyst is not reported. The perovskite-based nanotube array composite material is prepared from titanium material sheets, an electrolyte solution, an alkaline-earth metal hydroxide water solution and a metal nitrate water solution. The preparation method comprises the following steps of: polishing and washing the titanium material sheets, then anodizing in the electrolyte solution, putting intothe alkaline-earth metal hydroxide water solution for carrying out hydrothermal reaction, soaking in the metal nitrate solution and then carrying out reductive treatment by ultraviolet lights to obtain the perovskite-based nanotube array composite material. The perovskite-based nanotube array composite material has the degradation ratio on methyl orange is 30 to 85 percent and can be reused and used for carrying out photocatalytic degradation on pollutants in atmosphere and water; and the preparation method can carry out large-area film formation.

Description

technical field [0001] The invention relates to a nanotube array composite material and a preparation method thereof. Background technique [0002] With the rapid development of industrial production, a large amount of waste is continuously discharged into nature, which makes the living environment of human beings worse and worse. Among them, the problem of water pollution is particularly serious. Wastewater contains a large amount of organic pollutants, many of which are difficult to biodegrade. Their biological toxicity is relatively high, which seriously threatens human health and life. Nano-photocatalysts can directly use sunlight as a light source to mineralize organic pollutants into inorganic small molecules and become an ideal environmental pollution control technology. The existing powder photocatalysts are unevenly dispersed and powdery during use. It is difficult to recycle and cannot be reused. However, the degradation rate of the immobilized perovskite-based na...

Claims

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Application Information

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IPC IPC(8): B82B1/00B82B3/00B01J23/66B01J23/58B01J37/34C25D11/26
Inventor 刘佳雯孙玥李中华
Owner HARBIN NORMAL UNIVERSITY
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