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Bi2S3/Bi2MoO6 compound visible-light-induced photocatalyst as well as preparation method and application thereof

A catalyst and visible light technology, applied in the direction of light water/sewage treatment, energy wastewater treatment, etc., can solve the problems of low photogenerated electron-hole separation efficiency, low solar energy utilization rate, and inability to absorb visible light. Effects of surface area, cheap reagents

Inactive Publication Date: 2015-06-17
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the chemically stable titanium dioxide (TiO2) is the main research object, and its wide industrial application is greatly restricted. The main problem is the low utilization rate of solar energy. The energy band structure of / sub> determines that it can only absorb the ultraviolet part of sunlight and cannot absorb visible light
At the same time, because the separation efficiency of photogenerated electrons and holes is relatively low, so pure TiO2 often has the problem of low efficiency in practical applications.

Method used

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  • Bi2S3/Bi2MoO6 compound visible-light-induced photocatalyst as well as preparation method and application thereof
  • Bi2S3/Bi2MoO6 compound visible-light-induced photocatalyst as well as preparation method and application thereof
  • Bi2S3/Bi2MoO6 compound visible-light-induced photocatalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0027] The present invention is a kind of visible light response type Bi 2 S 3 / Bi 2 MoO 6 Composite photocatalyst and preparation method thereof, comprising the following steps:

[0028] In the first step, place 0.379 g of bismuth nitrate in 50 ml of deionized water for ultrasonic dispersion, and ultrasonically disperse for 30 minutes.

[0029] In the second step, 2.9 g of bismuth molybdate was added to the dispersion liquid obtained in the first step for ultrasonic dispersion, and the ultrasonic dispersion was performed for 20 minutes.

[0030] In the third step, 0.093 g of thioacetamide was added to the dispersion in the second step, and ultrasonically dispersed for 20 minutes.

[0031] In the fourth step, add commercial grade ammonia water with a mass concentration of 25-28% to the mixed liquid obtained in the third step, and keep stirring, test the pH with a glass rod, and adjust it to 7.

[0032] In the fifth step, the reaction product obtained in the fourth step is...

Embodiment 2

[0035] The present invention is a kind of visible light response type Bi 2 S 3 / Bi 2 MoO 6 Composite photocatalyst and preparation method thereof, comprising the following steps

[0036] In the first step, place 0.793 bismuth nitrate in 50 ml of deionized water for ultrasonic dispersion, and ultrasonically disperse for 30 minutes.

[0037] In the second step, 2.5 g of bismuth molybdate was added to the dispersion liquid obtained in the first step for ultrasonic dispersion, and the ultrasonic dispersion was performed for 20 minutes.

[0038] In the third step, 0.33 g of thioacetamide was added to the dispersion in the second step, and ultrasonically dispersed for 20 minutes.

[0039] In the fourth step, add commercial grade ammonia water with a mass concentration of 25-28% to the mixed liquid obtained in the third step, and keep stirring, test the pH with a glass rod, and adjust it to 7.

[0040] In the fifth step, the reaction product obtained in the fourth step is left t...

Embodiment 3

[0043] The present invention is a kind of visible light response type Bi 2 S 3 / Bi 2 MoO 6 Composite photocatalyst and preparation method thereof, comprising the following steps

[0044] In the first step, place 0.06 g of bismuth nitrate in 50 ml of deionized water for ultrasonic dispersion, and ultrasonically disperse for 30 minutes.

[0045] In the second step, 3.9 g of bismuth molybdate was added to the dispersion obtained in the first step for ultrasonic dispersion, and the ultrasonic dispersion was performed for 20 minutes.

[0046] In the third step, 0.03 g of thioacetamide was added to the dispersion in the second step, and ultrasonically dispersed for 20 minutes.

[0047] In the fourth step, add commercial grade ammonia water with a mass concentration of 25-28% to the mixed liquid obtained in the third step, and keep stirring, test the pH with a glass rod, and adjust it to 7.

[0048] In the fifth step, the reaction product obtained in the fourth step is left to s...

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Abstract

The invention discloses a visible-light response Bi2S3 / Bi2MoO6 compound photocatalyst and a preparation method thereof. The compound photocatalyst is formed by compounding Bi2S3 and Bi2MoO6 according to the mass ratio of (1:1) to (1:99). The preparation method comprises the following steps: weighing bismuth nitrate, dissolving in deionized water, performing ultrasonic dispersion until all the bismuth nitrate dissolves, adding thioacetamide, then adding Bi2MoO6, continuing stirring, adopting ammonium hydroxide to adjust the pH of the system to be 6-8, then continuing stirring, leaving the reaction product to stand, performing centrifugal separation, using deionized water to wash, drying to obtain powder of the compound photocatalyst, putting the powder in a crucible, putting the crucible in a muffle furnace, in the nitrogen atmosphere, heating the muffle furnace from the room temperature to 100-200 DEG C at the rate of 5 DEG C per minute, keeping the temperature for 4 h, and then, naturally cooling to the room temperature to obtain the Bi2S3 / Bi2MoO6 compound photocatalyst. The Bi2S3 / Bi2MoO6 compound photocatalyst prepared through the preparation method has better application prospect and economic benefit in sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of material preparation and visible light photocatalysis, and specifically relates to Bi 2 S 3 / Bi 2 MoO 6 Preparation of the formed composite visible light catalyst and its application in catalytic degradation of organic pollutants in water under visible light. Background technique [0002] Today's environmental problems are becoming more and more serious, which has attracted extensive attention worldwide. Photocatalytic technology is a potential ideal way to solve environmental problems. The use of photocatalytic technology to purify the environment is a "green technology", which has become a research hotspot in the academic and industrial circles of various countries. The photocatalyst can effectively remove harmful substances and sterilize the air under the irradiation of ultraviolet or visible light, and directly oxidize and decompose VOCs (formaldehyde, benzene series, nitrogen oxides and other po...

Claims

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Application Information

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IPC IPC(8): B01J27/051C02F1/30
CPCY02W10/37
Inventor 张海涛
Owner UNIV OF JINAN
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