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(BiO)2CO3-BiO2-x composite photocatalyst and preparation and application methods thereof

A 2co3-bio2-x, catalyst technology, applied in the field of photocatalysis, can solve the problem of low photocatalytic activity, achieve obvious degradation rate, increase specific surface area, and improve photocatalytic performance

Active Publication Date: 2018-08-17
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the prior art (BiO) 2 CO 3 The problem of low photocatalytic activity under visible light conditions provides a kind of (BiO) with strong absorption of visible light and high photocatalytic performance. 2 CO 3 -BiO 2-x composite photocatalyst

Method used

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  • (BiO)2CO3-BiO2-x composite photocatalyst and preparation and application methods thereof
  • (BiO)2CO3-BiO2-x composite photocatalyst and preparation and application methods thereof
  • (BiO)2CO3-BiO2-x composite photocatalyst and preparation and application methods thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In this example, NaBiO 3 2H 2 O and g-C 3 N 4 Prepared as raw material (BiO) 2 CO 3 -BiO 2-x The method of composite photocatalyst is realized by following steps:

[0025] 1.68g NaBiO 3 2H 2 O and 0.6 g g-C 3 N 4 (mass ratio is 2.8:1) dissolved in 40mL deionized water, stirred for 30 minutes, added NaOH solution, mixed evenly, the resulting mixture was transferred to a high-pressure hydrothermal kettle, and hydrothermal reaction was carried out at 180-200°C, and the reaction time was 4 ~10h, after the hydrothermal reaction is completed, cool down, filter out the precipitate, wash the precipitate with deionized water and ethanol, and dry it to obtain (BiO) 2 CO 3 -BiO 2-x Composite photocatalyst, x=0.15~0.6, (referred to as (BiO) 2 CO 3 -BiO 2-x -2.8).

[0026] The present invention will obtain (BiO) 2 CO 3 -BiO 2-x The nano photocatalyst is analyzed by XRD, the results are as follows figure 1 as shown, figure 1(BiO) provided for embodiment 1 of the ...

Embodiment 2

[0031] In this example, NaBiO 3 2H 2 O and g-C 3 N 4 Prepared as raw material (BiO) 2 CO 3 -BiO 2-x The method of composite photocatalyst is realized by following steps:

[0032] 1.68g NaBiO 3 2H 2 O and 0.49g g-C 3 N 4 (mass ratio is 3.4:1) dissolved in 40mL deionized water, stirred for 30 minutes, added NaOH solution, mixed evenly, the resulting mixture was transferred to a high-pressure hydrothermal kettle, and hydrothermal reaction was carried out at 100-150°C, and the reaction time was 4 ~10h, after the hydrothermal reaction is completed, cool down, filter out the precipitate, wash the precipitate with deionized water and ethanol, and dry it to obtain (BiO) 2 CO 3 -BiO 2-x Composite photocatalyst, x=0.15~0.6, (referred to as (BiO) 2 CO 3 -BiO 2-x -3.4).

[0033] The present invention will obtain (BiO) 2 CO 3 -BiO 2-x The photocatalyst was analyzed by SEM, and the results were as follows Figure 4 as shown, Figure 4 (BiO) prepared for Example 1 of the...

Embodiment 3

[0035] 1.68g NaBiO 3 2H 2 O and 0.4 g g-C 3 N 4 (mass ratio is 4.2:1) dissolved in 40mL deionized water, stirred for 30 minutes, added NaOH solution, mixed evenly, the resulting mixture was transferred to a high-pressure hydrothermal kettle, and hydrothermal reaction was carried out at 100-200°C, and the reaction time was 4 ~10h, after the hydrothermal reaction is completed, cool down, filter out the precipitate, wash the precipitate with deionized water and ethanol, and dry it to obtain (BiO) 2 CO 3 -BiO 2-x Composite photocatalyst, x=0.15~0.6, (referred to as (BiO) 2 CO 3 -BiO 2-x -4.2).

[0036] The present invention will obtain (BiO) 2 CO 3 -BiO 2-x The photocatalyst was analyzed by SEM, and the results were as follows Figure 5 as shown, Figure 5 (BiO) prepared for Example 1 of the present invention 2 CO 3 -BiO 2-x SEM image of the photocatalyst, by Figure 5 It can be seen that the (BiO) prepared in this example 2 CO 3 -BiO 2-x The photocatalyst is n...

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Abstract

The invention discloses a preparation method of a (BiO)2CO3-BiO2-x composite photocatalyst and belongs to the technical field of photocatalysis. The preparation method of the (BiO)2CO3-BiO2-x composite photocatalyst comprises dissolving NaBiO3*2H2O and a certain amount of g-C3N4 into deionized water, stirring the mixture for 30 min, then stirring in NaOH solution for 30 min, performing hydrothermal reaction at 180-200 DEG C for 4-10 h, after reaction is completed , cooling down and filtering out precipitates, washing the precipitates through deionized water and ethyl alcohol, and then drying the precipitates to obtain (BiO)2CO3-BiO2-x. According to the prepared (BiO)2CO3-BiO2-x composite photocatalyst, the composite BiO2-x improves absorptivity of (BiO)2CO3 to visible light and inhibits compounding of photo-induced electrons and holes at (BiO)2CO3 and accordingly improves the visible light catalyzing performance of (BiO)2CO3, especially, achieves a degradation rate of bisphenol A up tohigher than 70% and a degradation rate of phenol up to higher than 50%.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a (BiO) 2 CO 3 -BiO 2-x Composite photocatalyst and its preparation method and application. Background technique [0002] As the water pollution problem has been paid more and more attention in recent years, sewage treatment has become the main research object at present. Among them, photocatalytic technology has become one of the effective means to treat water pollution because of its non-toxic materials, strong oxidizing and reducing properties, no secondary pollution of products, and the ability to use solar energy. Currently, among photocatalytic materials, TiO 2 Because of its non-toxicity, strong strengthening ability and stable chemical properties, it has become the most popular photocatalytic material in the world. Due to TiO 2 Only when irradiated by ultraviolet light can electron and hole pairs be formed, and because of its narrow band gap, electrons and ho...

Claims

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Application Information

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IPC IPC(8): B01J27/232B01J35/02B01J35/10C02F1/30C02F101/34
CPCC02F1/30B01J27/232C02F2101/345C02F2305/10B01J35/39B01J35/40B01J35/61
Inventor 朱刚强
Owner SHAANXI NORMAL UNIV
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