Preparation method of photocatalyst based on monodisperse elemental bismuth and carbon nitride

A photocatalyst and carbon nitride technology, which is applied in the direction of physical/chemical process catalysts, separation methods, chemical instruments and methods, etc., can solve the problem that the structure and shape of elemental bismuth particles are difficult to control, affect the reaction ability of composite photocatalysts, and composite materials Problems such as agglomeration are prone to occur, achieving uniform appearance, reducing preparation costs, and avoiding poor appearance

Active Publication Date: 2017-10-20
CHONGQING TECH & BUSINESS UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in previous studies, the structure and morphology of elemental bismuth particles were difficult to control, and the dispersion was poor. The obtained composite materials were prone to agglomeration, which affected the use effect of t

Method used

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  • Preparation method of photocatalyst based on monodisperse elemental bismuth and carbon nitride
  • Preparation method of photocatalyst based on monodisperse elemental bismuth and carbon nitride
  • Preparation method of photocatalyst based on monodisperse elemental bismuth and carbon nitride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Use the method of the present invention to prepare the following materials, and carry out relevant characterization tests to the materials:

[0043] (1) Prepare carbon nitride with urea as the precursor. Dissolve 10g of urea in 20mL of deionized water, stir and dissolve, bake in an oven at 60°C for 8-12 hours to recrystallize, take it out and place it in a muffle furnace at 550°C Heating and calcining in medium temperature for 2 hours to obtain carbon nitride material;

[0044] (2) Dissolve 1.0 mM bismuth dodecanoate, a precursor of bismuth, in 12 mL of tetralin, and heat and stir at 110° C. for 30 minutes after blowing nitrogen gas to remove oxygen and moisture in the system. After adding 0.24mL of dodecanethiol to the solution as a stabilizer, slowly add 1.5mL of reducing agent trioctylphosphine, pay attention to the color change in the system, the solution turns yellow after adding dodecanethiol, and trioctylphosphine After the base phosphine is added, the solution ...

Embodiment 2-5

[0055] The research is to control the size of bismuth particles in the bismuth / carbon nitride composite photocatalyst by using the method of the invention.

[0056] Prepare elemental bismuth particles according to step (2) in Example 1, and prepare elemental bismuth / carbon nitride composite materials of different sizes by controlling the reaction precursor and aging reaction temperature and time. The different formulations of Examples 3-6 The ratios and aging temperatures are shown in the table below:

[0057]

Example 2

Example 3

Example 4

Example 5

Dosage of trioctylphosphine (mL)

1.0

2.0

1.5

1.5

Aging reaction temperature (°C)

60

60

70

75

Aging reaction time (min)

30

30

5

5

[0058] Figure 7 to Figure 10 It is a transmission electron microscope image of elemental bismuth particles with different particle sizes obtained according to Examples 2-5 of the present invention. It can be seen f...

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Abstract

The invention discloses a preparation method of a photocatalyst based on monodisperse elemental bismuth and carbon nitride. The method comprises the following key steps: monodisperse elemental bismuth particles which are prepared through a liquid phase chemical reduction technology are immobilized on the surface of carbon nitride used as a carrier and prepared by using urea as a precursor, and a surfactant component in the above obtained composite system is removed through a coordination exchange reaction to obtain the elemental bismuth/carbon nitride photocatalyst. The preparation method of the elemental bismuth/carbon nitride photocatalyst has the advantages of simple process, low energy consumption, controllable material morphology and high reaction activity. The elemental bismuth/carbon nitride photocatalyst prepared in the invention can rapidly and effectively remove carbon monoxide and other pollutants in air, and the catalysis activity can be regulated through the controllable synthesis of the elemental bismuth.

Description

technical field [0001] The invention relates to a high activity photocatalyst. Background technique [0002] With the continuous progress of the society and the rapid development of the economy, various environmental pollution problems have gradually become severe challenges faced by human beings. In recent years, air pollution incidents have occurred frequently, which has attracted widespread attention. Whether it is PM2.5 or various indoor toxic gases, they are closely related to our lives. According to statistics, 80% of people's life is spent indoors, and more than 60% of human diseases are related to indoor air pollution. With the improvement of human beings' requirements for the quality of living environment, indoor air pollution control has become a hot spot in the field of environmental restoration. The traditional indoor air purification technology is mainly realized by physical adsorption, but this method not only has low efficiency and poor stability, but also ha...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01D53/86B01D53/56
CPCB01D53/8628B01J27/24B01J35/004
Inventor 吕晓书曹嘉真蒋光明董帆
Owner CHONGQING TECH & BUSINESS UNIV
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