Method for detecting manganese content in graphene oxide and graphene samples

Abstract

The invention relates to a method for detecting manganese content in graphene oxide and graphene samples. The method is characterized by comprising: drawing a standard curve diagram of a relationship between absorbance and manganese content, measuring absorbance of a sample, and searching the corresponding manganese content from the standard curve diagram according to the absorbance of the sample. The method has the following characteristics that: the method is simple and easy to achieve, and detection precision of the manganese content can meet requirements.

Description

technical field

[0001] The invention relates to the technical field of new energy materials, in particular to a method for detecting manganese content in graphene oxide and graphene samples. Background technique

[0002] Graphene oxide and graphene are emerging materials in recent years with many superior properties. For example, graphene has high strength and good conductivity; graphene oxide is still a new type of carbon nanomaterial adsorbent, which can remove various heavy metal ions and dyes in wastewater. At present, various physical and chemical methods have been developed to prepare graphene. Among them, the chemical oxidation method is widely used. Generally, oxidizers such as potassium permanganate are used to oxidize graphite to obtain graphene oxide, but at the same time, manganese ions are introduced into the material to reasonably control the manganese content in graphene oxide and graphene. It can improve the purity of the product, and then improve the perfo...

Examples

Embodiment 1

[0022] (1) Accurately weigh 0.5000g of graphene oxide, accurate to 0.0001g;

[0023] (2) Place the sample in a quartz crucible, spread it flat, and add concentrated sulfuric acid dropwise until the sample is completely covered and blackened;

[0024] (3) Place the quartz crucible in an electric furnace and heat it until the yellow smoke dissipates;

[0025] (4) Take it out and place it in a muffle furnace and burn it at 900°C for 4 hours until the sample is completely burned and cooled;

[0026] (5) Add 10 mL of sulfuric acid with a density of 1.84 g / mL and 5 g of ammonium sulfate, cover with a watch glass, heat in an electric furnace until the residue is completely dissolved, cool, and rinse the watch glass and the crucible wall with distilled water;

[0027] (6) Add 1.5mL of nitric acid, add 40mL of distilled water, heat to near boiling, remove, add 0.3g of potassium periodate, heat and boil for 12min, cool, transfer to a 50mL volumetric flask, add distilled water to dilute...

Embodiment 2

[0030] (1) Accurately weigh 0.5000g of graphene, accurate to 0.0001g;

[0031] (2) Place the sample in a quartz crucible, spread it flat, and add concentrated sulfuric acid dropwise until the sample is completely covered and blackened;

[0032] (3) Place the quartz crucible in an electric furnace and heat it until the yellow smoke dissipates;

[0033] (4) Take it out and place it in a muffle furnace and burn it at 900°C for 4 hours until the sample is completely burned and cooled;

[0034] (5) Add 10 mL of sulfuric acid with a density of 1.84 g / mL and 5 g of ammonium sulfate, cover with a watch glass, heat in an electric furnace until the residue is completely dissolved, cool, and rinse the watch glass and the crucible wall with distilled water;

[0035] (6) Add 1.5mL of nitric acid, add 40mL of distilled water, heat to near boiling, remove, add 0.3g of potassium periodate, heat and boil for 12min, cool, transfer to a 50mL volumetric flask, add distilled water to dilute to th...

technical field

[0001] The invention relates to the technical field of new energy materials, in particular to a method for detecting manganese content in graphene oxide and graphene samples. Background technique

[0002] Graphene oxide and graphene are emerging materials in recent years with many superior properties. For example, graphene has high strength and good conductivity; graphene oxide is still a new type of carbon nanomaterial adsorbent, which can remove various heavy metal ions and dyes in wastewater. At present, various physical and chemical methods have been developed to prepare graphene. Among them, the chemical oxidation method is widely used. Generally, oxidizers such as potassium permanganate are used to oxidize graphite to obtain graphene oxide, but at the same time, manganese ions are introduced into the material to reasonably control the manganese content in graphene oxide and graphene. It can improve the purity of the product, and then improve the perfo...

Examples

Embodiment 1

[0022] (1) Accurately weigh 0.5000g of graphene oxide, accurate to 0.0001g;

[0023] (2) Place the sample in a quartz crucible, spread it flat, and add concentrated sulfuric acid dropwise until the sample is completely covered and blackened;

[0024] (3) Place the quartz crucible in an electric furnace and heat it until the yellow smoke dissipates;

[0025] (4) Take it out and place it in a muffle furnace and burn it at 900°C for 4 hours until the sample is completely burned and cooled;

[0026] (5) Add 10 mL of sulfuric acid with a density of 1.84 g / mL and 5 g of ammonium sulfate, cover with a watch glass, heat in an electric furnace until the residue is completely dissolved, cool, and rinse the watch glass and the crucible wall with distilled water;

[0027] (6) Add 1.5mL of nitric acid, add 40mL of distilled water, heat to near boiling, remove, add 0.3g of potassium periodate, heat and boil for 12min, cool, transfer to a 50mL volumetric flask, add distilled water to dilute...

Embodiment 2

[0030] (1) Accurately weigh 0.5000g of graphene, accurate to 0.0001g;

[0031] (2) Place the sample in a quartz crucible, spread it flat, and add concentrated sulfuric acid dropwise until the sample is completely covered and blackened;

[0032] (3) Place the quartz crucible in an electric furnace and heat it until the yellow smoke dissipates;

[0033] (4) Take it out and place it in a muffle furnace and burn it at 900°C for 4 hours until the sample is completely burned and cooled;

[0034] (5) Add 10 mL of sulfuric acid with a density of 1.84 g / mL and 5 g of ammonium sulfate, cover with a watch glass, heat in an electric furnace until the residue is completely dissolved, cool, and rinse the watch glass and the crucible wall with distilled water;

[0035] (6) Add 1.5mL of nitric acid, add 40mL of distilled water, heat to near boiling, remove, add 0.3g of potassium periodate, heat and boil for 12min, cool, transfer to a 50mL volumetric flask, add distilled water to dilute to th...

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