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Preparation method of CdS/g-C3N4 hollow microspheres

A hollow microsphere, g-c3n4 technology, applied in the field of photocatalysis, can solve the problems of limited practical application and low photocatalytic efficiency, and achieve the effect of improving photocatalytic performance, simple operation and uniform structure

Inactive Publication Date: 2017-12-19
GUANGXI NORMAL UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This has some unique electronic properties, but also has the characteristics of rich, clean, stable, and visible light response, which meets the basic requirements of photocatalysts. The catalytic efficiency is low, and the corresponding wavelength is less than 460nm, these characteristics limit its practical application

Method used

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  • Preparation method of CdS/g-C3N4 hollow microspheres
  • Preparation method of CdS/g-C3N4 hollow microspheres

Examples

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Effect test

Embodiment 1

[0020] A CdS / g-C 3 N 4 The preparation method of hollow microspheres comprises the following steps:

[0021] S1. In parts by weight, add 300 parts of liquid paraffin into a three-necked flask, add 13.47 parts of Span85 and 4.53 parts of Tween60 into the three-necked flask, then stir at a speed of 300 r / min, and heat the three-necked flask with a water bath at 40°C;

[0022] S2. In terms of parts by weight, take 5.2 parts of ethyl orthosilicate and dissolve it in 45 parts by mass of 40% ethanol aqueous solution and stir at a speed of 700 r / min at a water bath temperature of 15°C, and then add a concentration of 25% The ammoniacal liquor makes pH value reach 8 and obtains reaction solution A, and reaction solution A is added dropwise in the there-necked flask and reacts for 30min;

[0023] S3. In parts by weight, get 9.46 parts of cadmium nitrate and 2.5 parts of g-C 3 N 4 Add 25 parts of water to obtain reaction solution C, take 3 parts of thioacetamide and add 10 parts of ...

Embodiment 2

[0027] A CdS / g-C 3 N 4 The preparation method of hollow microspheres comprises the following steps:

[0028] S1. In parts by weight, take 300 parts of liquid paraffin into a three-necked flask, add 17.14 parts of Span85 and 6.86 parts of Tween80 into the three-necked flask, then stir at a speed of 400 r / min, and heat the three-necked flask in a water bath at 40°C;

[0029] S2. In terms of parts by weight, take 5.2 parts of ethyl orthosilicate and dissolve it in 48 parts by mass of 45% ethanol aqueous solution and stir at a speed of 500 r / min at a water bath temperature of 10°C, and then add a concentration of 25% Aqueous ammonia makes the pH value reach 9 to obtain reaction solution A, and reaction solution A is added dropwise in the three-necked flask to react for 40min;

[0030] S3. In parts by weight, get 9.46 parts of cadmium nitrate and 1.2 parts of g-C 3 N 4 Add 25 parts of water to obtain reaction solution C, take 3 parts of thioacetamide and add 10 parts of water t...

Embodiment 3

[0034] A CdS / g-C 3 N 4 The preparation method of hollow microspheres comprises the following steps:

[0035] S1. In parts by weight, take 300 parts of liquid paraffin into a three-necked flask, add 26.44 parts of Span65 and 9.56 parts of Tween60 into the three-necked flask, then stir at a speed of 500 r / min, and heat the three-necked flask with a water bath at 40°C;

[0036] S2. In terms of parts by weight, take 5.2 parts of ethyl orthosilicate and dissolve it in 50 parts by mass of 50% ethanol aqueous solution and stir at a speed of 600 r / min at a water bath temperature of 12°C, and then add a concentration of 25% Aqueous ammonia makes the pH value reach 8.5 to obtain reaction solution A, and reaction solution A is added dropwise in the three-necked flask to react for 45min;

[0037] S3. In parts by weight, get 9.46 parts of cadmium nitrate and 2 parts of g-C 3 N 4 Add 25 parts of water to obtain reaction solution C, take 3 parts of thioacetamide and add 10 parts of water...

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Abstract

The invention discloses a preparation method of CdS / g-C3N4 hollow microspheres. The preparation method comprises the following steps: firstly taking liquid paraffin as an oil phase, taking tetraethoxysilane as a silicon source, preparing silicon dioxide microspheres according to an emulsion method, then taking the silicon dioxide microspheres as templates, compounding g-C3N4 while taking cadmium nitrate and thioacetamide to prepare cadmium sulfide, and then taking a sodium hydroxide solution to remove silicon dioxide templates so as to prepare the CdS / g-C3N4 hollow microspheres. The average grain diameter of the CdS / g-C3N4 hollow microspheres prepared according to the invention is 493 nm, and the CdS / g-C3N4 hollow microspheres have the characteristics of small grain diameters, uniform size, spherical appearance and high stability.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a CdS / g-C 3 N 4 Preparation method of hollow microspheres. Background technique [0002] With the rapid development of human society, the governance of the environment has not kept pace with the excessive consumption of energy, thus causing problems of energy shortage and environmental pollution. Photocatalytic hydrogen production and photocatalytic decomposition based on semiconductor photocatalytic technology have become the most promising methods to solve the above two problems. Graphite carbon nitride (g-C 3 N 4 ) has good chemical stability and a small direct bandgap (band gap of 2.7eV). This has some unique electronic properties, but also has the characteristics of rich, clean, stable, and visible light response, which meets the basic requirements of photocatalysts. The catalytic efficiency is low, and the corresponding wavelength is less than 460nm, these characteristic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J27/24
CPCB01J13/02B01J27/24B01J35/39B01J35/51
Inventor 张春艳赖家胜
Owner GUANGXI NORMAL UNIV OF SCI & TECH
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