Method for preparing visible light photocatalyst Bi2O3/TiO

A photocatalyst and visible light technology, which is applied in the field of catalytic materials and environmental chemical industry, can solve the problem of high cost and achieve the effect of improving utilization rate, low cost and simple operation

Inactive Publication Date: 2010-06-23
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, organic polymers are inherently light-blocking and can be degraded by photocatalysis
Zhenfeng Bian, Hexing Li Prepared Mesoporous Compound Semiconductor Bi by Self-Assembly Synthesis 2 o 3 /TiO 2 , under the visible light irradiatio

Method used

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  • Method for preparing visible light photocatalyst Bi2O3/TiO
  • Method for preparing visible light photocatalyst Bi2O3/TiO
  • Method for preparing visible light photocatalyst Bi2O3/TiO

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) Add 0.1 gram of cetyltrimethylammonium bromide (CTAB) to 15 mL of absolute ethanol, and ultrasonically dissolve to form a transparent solution A with a CTAB concentration of 0.018 mol / L;

[0022] (2) Add 6 mL of butyl titanate to solution A, and ultrasonically dissolve to form a light yellow solution B with a molar percentage of CTAB and butyl titanate of 1.6%;

[0023] (3) Under stirring, the temperature of solution B was raised to 80° C., 0.154 g of bismuth nitrate pentahydrate was added, and ultrasonically dispersed to form a light yellow sol with a molar percentage of bismuth nitrate pentahydrate and butyl titanate of 1.8%;

[0024] (4) standing at 25°C to form a light yellow gel;

[0025] (5) Aging at 90°C to obtain light yellow small particles;

[0026] (6) Warming up to 450°C at room temperature, calcined for 8 hours, and then naturally cooled to room temperature, Bi with visible light catalytic activity was obtained. 2 o 3 / TiO 2 compound semiconductor. ...

Embodiment 2

[0031] (1) 0.06 gram of cetyltrimethylammonium bromide (CTAB) was added to 20 mL of absolute ethanol, and ultrasonically dissolved to form a transparent solution A with a CTAB concentration of 0.008 mol / L;

[0032] (2) 6 mL of butyl titanate was added to solution A, and dissolved by ultrasonic to form a pale yellow transparent solution B with a molar percentage of CTAB and butyl titanate of 1.2%;

[0033] (3) Under stirring, the temperature of solution B was raised to 75°C, 0.09 g of bismuth nitrate pentahydrate was added, and ultrasonically dispersed to form a light yellow sol with a molar percentage of bismuth nitrate pentahydrate and butyl titanate of 1.0%;

[0034] (4) standing at 45°C to form a light yellow gel;

[0035] (5) aging at 80°C to obtain light yellow small particles;

[0036] (6) Warming up to 550°C at room temperature, calcining for 5 hours, and then naturally cooling to room temperature, Bi with visible light catalytic activity was obtained. 2 o 3 / TiO 2 ...

Embodiment 3

[0039] (1) 0.15 g of cetyl trimethyl ammonium bromide (CTAB) was added to 15 mL of absolute ethanol, and dissolved by ultrasonic to form a transparent solution A with a CTAB concentration of 0.028 mol / L;

[0040] (2) 6ml of butyl titanate was added to solution A, and ultrasonically dissolved to form a pale yellow transparent solution B with a molar percentage of CTAB and butyl titanate of 2%;

[0041] (3) under stirring state, solution B is warmed up to 85 ℃, adds 0.22 gram of bismuth nitrate pentahydrate, and ultrasonically disperses to form a pale yellow sol whose molar percentage of bismuth nitrate pentahydrate and butyl titanate is 2.6%;

[0042] (4) Stand at 35°C to form a pale yellow gel;

[0043] (5) Aging at 100°C to obtain light yellow small particles.

[0044] (6) be heated to 500 ℃ at room temperature, calcined for 6.5 hours, then naturally cooled to room temperature to obtain Bi with visible light catalytic activity 2 O 3 / TiO 2 compound semiconductor.

[0045...

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Abstract

The invention relates to a method for preparing visible light photocatalyst Bi2O3/TiO2, comprising the following steps: (1) adding cetyl trimethyl ammonium bromide to anhydrous ethanol, and ultrasonically dissolving the cetyl trimethyl ammonium bromide to the anhydrous ethanol to form transparent solution A; (2) adding tetrabutyl titanate to the solution A, and ultrasonically dissolving the tetrabutyl titanate to the solution A to form light yellow transparent solution B; (3) heating the solution B to 75-85 DEG C, adding bismuth nitrate pentahydrate to the solution B, and ultrasonically dispersing the bismuth nitrate pentahydrate to the solution B to form light yellow sol; (4) standing the light yellow sol at 25-45 DEG C to form light yellow gel; (5) aging the light yellow gel at 80-100 DEG C to form light yellow particles; and (6) heating light yellow particles from the room temperature to 450-550 DEG C, calcining the light yellow particles for 5-8h, and cooling the calcined light yellow particles to room temperature naturally to obtain compound semiconductor with visible light catalytic activity. The method for preparing the visible light photocatalyst of Bi2O3/TiO inhibits the combination of the light induced electrons and the hole, improves the quantum efficiency of the photocatalytic reaction and the utilization of solar energy, is easy to operate, has low cost and lays a foundation for the light catalytic technology to be practical. The photocatalyst Bi2O3/TiO2 has high visible light catalytic performance.

Description

technical field [0001] The invention relates to a visible light photocatalyst Bi 2 o 3 / TiO 2 The preparation method is applied to the degradation of organic pollutants in water bodies, and belongs to the technical field of catalytic materials and environmental chemical industry. Background technique [0002] In the late 1980s, the application research of photocatalytic oxidation method in the field of environmental pollution control began. Because this technology can effectively mineralize many structurally stable biorefractory pollutants, compared with traditional treatment methods, it has obvious advantages such as high efficiency and complete pollutant degradation, so it has been paid more and more attention. Among the semiconductor catalysts used in heterogeneous photocatalytic reactions, TiO 2 Because of its non-toxicity, high catalytic activity and good stability, its application potential in wastewater treatment has been reported in many literatures, and it is th...

Claims

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Application Information

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IPC IPC(8): B01J23/18B01J21/06B01J37/34A62D3/10A62D101/28
Inventor 刘元德辛峰王富民罗善霞
Owner TIANJIN UNIV
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