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Method for preparing one-dimensional hollow superstructure photocatalytic material of Bi system composite oxide

A technology for composite oxides and photocatalytic materials, which is applied in the field of preparation of Bi-based composite oxide photocatalytic materials, can solve problems such as difficult recycling, low catalytic activity driven by sunlight, and single structure, and achieves a simple and easy preparation method , Excellent sunlight-driven photocatalytic activity and efficiency improvement effect

Active Publication Date: 2012-12-05
HARBIN INST OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing Bi-based photocatalytic materials have a single structure, difficult recovery, and low sunlight-driven catalytic activity for the degradation of RhB organic dyes, and provide a method for preparing Bi-based composite oxides. A method for hollow superstructured photocatalytic materials

Method used

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  • Method for preparing one-dimensional hollow superstructure photocatalytic material of Bi system composite oxide
  • Method for preparing one-dimensional hollow superstructure photocatalytic material of Bi system composite oxide
  • Method for preparing one-dimensional hollow superstructure photocatalytic material of Bi system composite oxide

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specific Embodiment approach 1

[0019] Specific embodiment one: In this embodiment, a method for preparing a Bi-based composite oxide one-dimensional hollow superstructure photocatalytic material is realized according to the following steps:

[0020] First, the one-dimensional Bi 2 o 3 The nanorods are dispersed in absolute ethanol, and then the aqueous solution of acetic acid is added dropwise until the pH value of the system is 3-6 to obtain a suspension;

[0021] 2. Dissolve the oxysalt in deionized water to obtain an aqueous solution of the oxysalt. Under the condition of magnetic stirring at 200-700 r / min, add the aqueous solution of the oxysalt to the suspension in step 1, and then transfer Put it in a stainless steel reaction kettle with a polytetrafluoroethylene liner, react at a temperature of 100-180°C for 6-14 hours, cool naturally to room temperature, wash with deionized water and absolute ethanol three times after centrifugation, and then put In an oven, dry at a temperature of 60°C for 6 hour...

specific Embodiment approach 2

[0025] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, acetic acid aqueous solution is added dropwise until the pH value of the system is 4-5.5. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0026] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that step 2 is reacted at a temperature of 120-160° C. for 8-11 hours. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a method for preparing a one-dimensional hollow superstructure photocatalytic material of a Bi system composite oxide and relates to a preparation method of a Bi system composite oxide photocatalytic material. The method solves the problems that the structure of the existing Bi system photocatalytic material is single, the recovery is difficult, and the sunlight driving photocatalytic activity is low. The preparation method comprises the following steps that 1, a one-dimensional Bi2O3 nanometer bar is dispersed in anhydrous ethanol, acetic acid water solution is dripped for regulating the pH value, and turbid liquid is obtained; and 2, oxysalt water solution is added into the turbid liquid, then, the mixed solution is put in a reaction kettle for heating reaction and is dried in a drying box after the centrifugation and the washing, and the photocatalytic material of the Bi system composite oxide is obtained. The Bi system photocatalytic material prepared by the method has the one-dimensional hollow superstructure, the preparation method is simple, the implementation is easy, the specific surface area of the product is large, the recovery is easy, the photocatalytic activity is superior to that of the traditional commercial TiO2 photocatalytic material, and the photocatalytic material is mainly applied to the photocatalysis study.

Description

technical field [0001] The invention relates to a preparation method of a Bi-based composite oxide photocatalyst material. Background technique [0002] In recent years, energy shortage and environmental pollution have become increasingly serious. How to deal with highly toxic and biodegradable organic matter has become a major problem we need to face. Photocatalysis technology converts the absorbed light energy into chemical energy, so that many organic pollutants that are usually difficult to decompose can be degraded smoothly under relatively mild conditions, showing a good application prospect of photocatalysis in the field of green chemistry to control organic pollutants . At present, most researches on photocatalysts focus on TiO 2 based doping or modification. But due to TiO 2 With a large band gap (3.2eV), it can only be excited by the ultraviolet part of the solar spectrum, and the ultraviolet part only accounts for 4% of the total solar energy irradiated to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J23/22C02F1/30
Inventor 刘淑娟侯亚飞王铀
Owner HARBIN INST OF TECH
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