Preparation method for composite photocatalytic material based on microbial template

A technology for composite photocatalysis and photocatalytic materials, which is applied in the field of composite photocatalytic material preparation based on microbial templates, and can solve the problems of aggregation of gold nanoparticles, difficulty in obtaining size nanomaterials, and coupling and synergy of difficult composite photocatalytic materials.

Active Publication Date: 2018-11-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the patent CN105363477A, ​​the silver-cadmium sulfide-titanium dioxide ternary composite photocatalytic material was prepared by evaporation-induced self-assembly and photodeposition. This method uses a grinding process to prepare powder composite materials, and it is difficult to obtain nanomaterials with uniform size and regular shape.
In addition, in the patent CN105498802A, a zinc oxide-gold-cadmium sulfide ternary composite photocatalytic material with a one-dimensional nanorod array structure was prepared through the process of electrochemical deposition and photodeposition. The nanoscale controllability of mass junction and gold nanoparticle size and loading site is easy to cause problems such as heterojunction overlap and gold nanoparticle aggregation
The current preparation method is difficult to maximize the coupling and synergy between the components of the composite photocatalytic material, so it is necessary to explore a new nanoscale controllable composite photocatalytic material preparation method

Method used

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  • Preparation method for composite photocatalytic material based on microbial template
  • Preparation method for composite photocatalytic material based on microbial template
  • Preparation method for composite photocatalytic material based on microbial template

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this example, titanium dioxide is used as the photocatalytic material 5, Au is used as the catalytic loading material I6, and M13 phage is used as the biological template. The structure of M13 phage is as follows: figure 1 shown. The specific preparation process of the composite photocatalytic material is as follows:

[0028] 1) Use phage display technology to screen the polypeptide Ⅰ3 with specific adsorption and nucleation ability to the photocatalytic material titanium dioxide 5 and the polypeptide Ⅱ4 with specific adsorption and nucleation ability to the catalytic loading material ⅠAu6;

[0029] 2) Using genetic modification technology to express the polypeptide I3 with specific adsorption and nucleation ability on PⅧ protein 1 of M13 phage, and express the polypeptide II4 with specific adsorption and nucleation ability on PⅢ protein 2 of M13 phage, Its structure is as figure 2 shown;

[0030] 3) The concentration of 25mL genetic modification is 5×10 13 Pfu / ...

Embodiment 2

[0033] In this example, titanium dioxide is used as the photocatalytic material 5, Au is used as the catalytic supporting material I6, cadmium sulfide is used as the catalytic supporting material II8, and M13 phage is used as the biological template. The structure of M13 phage is as follows: figure 1 shown. The specific preparation process of the composite photocatalytic material is as follows:

[0034] 1) Use phage display technology to screen the polypeptide Ⅰ3 with specific adsorption and nucleation ability to the photocatalytic material titanium dioxide 5, the polypeptide Ⅱ4 with specific adsorption and nucleation ability to the catalytic loading material ⅠAu6, and the sulfidation of the catalytic loading material Ⅱ Cadmium 8 is a peptide III7 with specific adsorption and nucleation capabilities;

[0035] 2) Using genetic modification technology to express polypeptide I3 and polypeptide III7 with specific adsorption and nucleation ability on PⅧ protein 1 at different posi...

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Abstract

The invention discloses a preparation method for a composite photocatalytic material based on a microbial template, and belongs to the field of photocatalysis. The method comprises the following steps: firstly screening polypeptide with specific adsorption and nucleation ability by utilizing a phage display technology, expressing the polypeptide on a capsid protein of a specific microorganism through a genetic modification technology, finally putting the modified microorganism into a sol of a photocatalytic material by using the modified microorganism as a template, and putting the obtained microorganism into a sol of a co-catalysis supported material by using the obtained microorganism as a template to prepare the composite photocatalytic material. The preparation method for the compositephotocatalytic material based on the microbial template disclosed by the invention can realize preparation of mass nano composite photocatalytic materials, the preparation process is nano-scale controllable, and the photocatalytic efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a method for preparing a composite photocatalytic material based on a microbial template. Background technique [0002] In the 21st century, energy and the environment are two important issues that human beings face and need to be resolved urgently. Due to the advantages of low energy consumption and no secondary pollution, photocatalytic technology has become an ideal environmental pollution control technology and clean energy production technology, and is widely used in energy, water or air purification, medical and health care, and national defense and military fields. Multi-component composite photocatalytic materials with zero-dimensional or one-dimensional nanostructures can effectively reduce the recombination rate of photogenerated electron-hole pairs, increase the surface catalytic reaction speed and increase the spectral absorption range of wide-bandgap photocatalytic mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/00B01J37/00
CPCB01J31/38B01J35/004B01J35/006B01J37/0009
Inventor 马炳和罗剑王冠毕珍李博源邓进军苑伟政
Owner NORTHWESTERN POLYTECHNICAL UNIV
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