Method for preparing lotus leaf carbon nanometer material

A technology of nanomaterials and lotus leaf carbon, which is applied in the field of nanomaterials, can solve the problems of high requirements for reaction equipment, high raw material prices, and high production costs, and achieve the effects of low raw material costs, simple preparation processes, and improved utilization rates

Inactive Publication Date: 2017-02-01
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The synthesis method of carbon nanomaterials in the prior art has disadvantages such as insufficient environmental protection, high synthesis temperature, high requirements for reaction equipment, high production cost, and high raw material price.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of lotus leaf carbon nanomaterials, specifically comprising the following steps:

[0026] (1) picking and removing impurities after the lotus leaves are collected, washing, freeze-drying, crushing and sieving to obtain 100-mesh lotus leaf powder;

[0027] (2) Calcining the lotus leaf powder in a nitrogen atmosphere at 200°C until black for 60 minutes to obtain a pre-carbonized product;

[0028] (3) Add potassium permanganate to the pre-carbonized product according to a weight ratio of 1:1, and stir for 4 hours at a temperature of 50° C. and a stirring speed of 50 r / min to obtain a precursor; Dry at 50°C for 6h to obtain an intermediate product;

[0029] (4) heat-treating the intermediate product to obtain product I, the conditions of the heat treatment are heating up to 600°C at a heating rate of 10°C / min, and then heating for 0.5h at an inert gas flow rate of 30mL / min;

[0030] (5) Treat the product I with 10-30% hydrochloric acid by acid leachin...

Embodiment 2

[0032] Different from Example 1, a preparation method of lotus leaf carbon nanomaterials specifically comprises the following steps:

[0033] (1) picking and removing impurities after the lotus leaves are collected, washing, freeze-drying, crushing and sieving to obtain 50 mesh lotus leaf powder;

[0034] (2) Calcining the lotus leaf powder in an argon atmosphere at 800°C until black for 60 minutes to obtain a pre-carbonized product;

[0035] (3) Add phosphorus pentoxide to the pre-carbonized product according to a weight ratio of 1:5, and stir for 10 h at a temperature of 50° C. and a stirring speed of 300 r / min to obtain a precursor; Dry at 100°C for 12 hours to obtain an intermediate product;

[0036] (4) heat-treating the intermediate product to obtain product I, the conditions of the heat treatment are to heat up to 1400°C at a heating rate of 20°C / min, and then heat for 6h at an inert gas flow rate of 200mL / min;

[0037] (5) The product I was treated with 30-60% sulfur...

Embodiment 3

[0039] Different from Examples 1 and 2, a method for preparing lotus leaf carbon nanomaterials specifically comprises the following steps:

[0040] (1) picking and removing impurities after the lotus leaves are collected, washing, freeze-drying, crushing and sieving to obtain 70 mesh lotus leaf powder;

[0041] (2) Calcining the lotus leaf powder in an argon atmosphere at 650°C until black for 30 minutes to obtain a pre-carbonized product;

[0042] (3) Add phosphorus pentoxide to the pre-carbonized product according to a weight ratio of 1:3, and stir for 8 hours at a temperature of 30° C. and a stirring speed of 250 r / min to obtain a precursor; Dry at 85°C for 10 hours to obtain an intermediate product;

[0043] (4) heat-treating the intermediate product to obtain product I, the conditions of the heat treatment are heating up to 1000°C at a heating rate of 15°C / min, and then heating for 3h at an inert gas flow rate of 100mL / min;

[0044] (5) The product I was treated with 48...

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PUM

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Abstract

The invention discloses a method for preparing a lotus leaf carbon nanometer material. The method specifically includes the following steps that firstly, after being collected, lotus leaves are selected, subjected to impurity removal, cleaned, freeze-dried, smashed and screened, and 50-100-mesh lotus leaf powder is prepared; secondly, the lotus leaf powder is placed in an inert gas atmosphere and the like to prepare a pre-carbonization product; thirdly, an activating agent is added into the pre-carbonization product to prepare a precursor, the precursor is dried for 6-12 h at 50-100 DEG C, and an intermediate product is prepared; fourthly, the intermediate product is subjected to heat treatment to prepare a product I; fifthly, the product I is processed through the acid leaching method, and the lotus leaf carbon nanometer material is prepared. The lotus leaves are used for preparing the carbon nanometer material, a new biomass carbon material preparation method is disclosed, raw materials are rich, the preparation process is simple, pollution is not caused, and quantitative production can be achieved.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing lotus leaf carbon nanomaterials. Background technique [0002] Lotus leaf, also known as lotus stem, lotus stem. There are many tiny papillae on the surface of the lotus leaf, with an average size of about 10 microns and an average spacing of about 12 microns, and each papillae is composed of many protrusions with a diameter of about 200 nanometers. Adding "nanostructure" to the "microstructure" forms numerous "hills" densely distributed on the surface of the lotus leaf. "Mountains" running around, can't get into the inside of the lotus leaf, so the lotus leaf has water-repelling properties. The basic chemical composition of lotus leaf is polysaccharide carbohydrates such as chlorophyll, cellulose, starch, etc. It is rich in polar groups such as hydroxyl OH-, amino NH-, etc. It should be easy to absorb water or stains in the natural environment, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15B82Y40/00
CPCC01P2004/62C01P2004/64
Inventor 曲丽君田明伟周珍卉迟淑丽赵壬海于荣荣赵洪涛
Owner QINGDAO UNIV
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