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Preparation method of composite material and application of composite material in photocatalytic disinfection in water

A composite material, photocatalytic technology, applied in the field of composite material preparation, to achieve remarkable results

Pending Publication Date: 2021-09-24
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is that in the prior art, it is impossible to obtain a good pathogenic microorganism removal effect under the condition of ensuring water safety, thereby providing a method for preparing a composite material and photocatalytic disinfection in water. Applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a photocatalytic composite material, comprising:

[0028] Step 1. Purchasing and obtaining nano-scale titanium dioxide and corn stalk powder with a particle size within 10nm respectively; passing the corn stalk powder through a 60-mesh sieve to obtain corn stalk powder with a particle size less than 60 mesh, and using deionized water to sieve the sieved corn stalk powder Wash and filter three times, and dry in a drying oven at a constant temperature, where the temperature is set at 50°C and the drying time is set at 12h.

[0029] Step 2. Put the dried straw powder in the crucible, cover the lid and wrap the crucible with a layer of tin foil to keep it in a sealed environment, put it in a muffle furnace, and set the heating rate at 10°C / min Raise the temperature in the muffle furnace to 500°C and keep it warm for 6 hours to prepare biochar;

[0030] Step 3. Weigh nano-scale titanium dioxide and biochar according to the mass ratio of 1:5, mix nano-...

Embodiment 2

[0032] A method for preparing a photocatalytic composite material, comprising:

[0033] Step 1. Purchasing and obtaining nano-scale titanium dioxide and corn stalk powder with a particle size within 10nm respectively; passing the corn stalk powder through a 60-mesh sieve to obtain corn stalk powder with a particle size less than 60 mesh, and using deionized water to sieve the sieved corn stalk powder Wash and filter three times, and dry in a drying oven at a constant temperature, where the temperature is set at 50°C and the drying time is set at 12h.

[0034] Step 2. Put the dried straw powder in the crucible, cover the lid and wrap the crucible with a layer of tin foil to keep it in a sealed environment, put it in a muffle furnace, and set the heating rate at 10°C / min Raise the temperature in the muffle furnace to 500°C and keep it warm for 6 hours to prepare biochar;

[0035] Step 3: Weigh nano-scale titanium dioxide and biochar according to the mass ratio of 1:4, mix nano-...

Embodiment 3

[0037] A method for preparing a photocatalytic composite material, comprising:

[0038] Step 1. Purchasing and obtaining nano-scale titanium dioxide and corn stalk powder with a particle size within 10nm respectively; passing the corn stalk powder through a 60-mesh sieve to obtain corn stalk powder with a particle size less than 60 mesh, and using deionized water to sieve the sieved corn stalk powder Wash and filter three times, and dry in a drying oven at a constant temperature, where the temperature is set at 50°C and the drying time is set at 12h.

[0039] Step 2. Put the dried straw powder in the crucible, cover the lid and wrap the crucible with a layer of tin foil to keep it in a sealed environment, put it in a muffle furnace, and set the heating rate at 10°C / min Raise the temperature in the muffle furnace to 500°C and keep it warm for 6 hours to prepare biochar;

[0040] Step 3. Weigh the nano-scale titanium dioxide and biochar according to the mass ratio of 1:2, mix t...

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Abstract

The invention discloses a preparation method of a composite material and application of the composite material in photocatalytic disinfection in water. The preparation method of the photocatalytic composite material comprises the following steps: obtaining raw materials: respectively obtaining nanoscale titanium dioxide and biochar; sealed calcinating: mixing the nanoscale titanium dioxide and the biochar according to the mass ratio of 3: (3-16) and then subjecting to sealed calcination at the temperature of 300-750 DEG C, and obtaining a finished product. According to the invention, a relatively good pathogenic microorganism removal effect can be obtained under the condition of ensuring water safety, the pathogenic microorganism removal efficiency can reach 80% or above, even 99% or above, and the effect is remarkable.

Description

technical field [0001] The invention relates to the field of disinfectants, in particular to a preparation method of a composite material and the application of photocatalytic disinfection in water. Background technique [0002] With the development of human society, people's demand for water resources is becoming increasingly tense, and water consumption is increasing. At the same time, the problem of water pollution is also seriously threatening the supply and demand of water resources. These are exacerbating the impact of water crisis on human society. . Compared with domestic sewage and industrial wastewater, rainwater is less polluted and highly acceptable to people. Therefore, rainwater as a recyclable water resource is of great significance to alleviate the water resource crisis. [0003] Traditional water treatment technology can effectively remove suspended solids, organic matter, heavy metals and other pollutants in water. For microbial pollutants in water such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18C02F1/30
CPCB01J21/18C02F1/30C02F2305/10C02F2303/20B01J35/39
Inventor 刘安谢耀锋
Owner SHENZHEN UNIV
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