Method for preparing porous photoluminescence material by utilization of rice husks
A photoluminescent material and rice husk technology, applied in the field of material chemistry, can solve the problems of high heavy metal content, high price, complex process, etc., and achieve the effect of simple production process, low cost, and wide source of raw materials
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Embodiment 1
[0034] (1) Pretreatment: In terms of mass percentage, add 100g of rice husk to 1000g of aqueous solution containing 0.2% hydrochloric acid and 0.1% hydrogen peroxide, treat at 100°C for 120 minutes, wash with water and dry;
[0035] (2) Thermal decomposition: pyrolyze the product obtained in step (1) for 120 minutes at 600°C in a nitrogen atmosphere to prepare a silicon-carbon composite material;
[0036] (3) Thermal oxidative decomposition: the product obtained in step (2) was incinerated in air at 550° C. for 120 minutes to prepare a porous photoluminescent material.
[0037] The specific surface area and pore structure of the material were tested by the TriStar automatic specific surface area and pore size analyzer of American Mike Company (see Table 1 for the results), and the luminescence properties of the material were tested by the Hitachi F-4500 fluorescence spectrometer of Japan (see the results in Table 1). figure 1 ). The specific surface area of this sample is 3...
Embodiment 2
[0039] (1) Pretreatment: In terms of mass percentage, add 100g of rice husk to 1000g of aqueous solution containing 0.01% hydrochloric acid and 0.1% hydrogen peroxide, treat at 300°C for 30 minutes, wash with water and dry;
[0040] (2) Thermal decomposition: pyrolyze the product obtained in step (1) in an argon atmosphere at 1500°C for 10 minutes to prepare a silicon-carbon composite material;
[0041] (3) Thermal oxidative decomposition: the product obtained in step (2) was incinerated in air at 1000° C. for 10 minutes to prepare a porous photoluminescent material.
[0042] The specific surface area and pore structure of the material were tested by the TriStar automatic specific surface area and pore size analyzer of American Mike Company (see Table 1 for the results), and the luminescence properties of the material were tested by the Hitachi F-4500 fluorescence spectrometer of Japan (see the results in Table 1). figure 2 ). The specific surface area of this sample is 98...
Embodiment 3
[0044] (1) Pretreatment: In terms of mass percentage, add 100g of rice husk to 1000g of aqueous solution containing 30% hydrochloric acid and 5% chlorine dioxide, treat at 20°C for 300 minutes, wash with water and dry;
[0045] (2) Thermal decomposition: pyrolyze the product obtained in step (1) for 300 minutes at 400°C in a nitrogen atmosphere to prepare a silicon-carbon composite material;
[0046] (3) Thermal oxidative decomposition: the product obtained in step (2) was incinerated in air at 400° C. for 300 minutes to prepare a porous photoluminescent material.
[0047] The specific surface area and pore structure of the material were tested by the TriStar automatic specific surface area and pore size analyzer of American Mike Company (see Table 1 for the results), and the luminescence properties of the material were tested by the Hitachi F-4500 fluorescence spectrometer of Japan (see the results in Table 1). image 3 ). The specific surface area of this sample is 289m ...
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