Method for preparing Fe-encapsulating metal carbon onions with even particle size through macroscopic quantity

A carbon onion and iron-coated technology is applied in the field of macro-scale preparation of iron-coated carbon onions with uniform particle size, which can solve the problems of high cost of internal-coated iron-coated carbon onions, great harm to the environment and laboratory personnel, and difficulty in controlling product appearance. , to achieve the effect of low equipment requirements and dependence, stable product quality, simple and controllable implementation steps

Active Publication Date: 2016-10-26
HARBIN INST OF TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of high cost, low yield and purity, harsh reaction conditions, difficult control of product appearance, and great harm to the environment and experimenters in the preparation of iron metal carbon onions by the existing method, and provides a macro-preparation pellet Method for inner-coating iron metal carbon onion with uniform diameter

Method used

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  • Method for preparing Fe-encapsulating metal carbon onions with even particle size through macroscopic quantity
  • Method for preparing Fe-encapsulating metal carbon onions with even particle size through macroscopic quantity
  • Method for preparing Fe-encapsulating metal carbon onions with even particle size through macroscopic quantity

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specific Embodiment approach 1

[0019] Specific embodiment one: the present embodiment is a kind of method for macro-preparing iron metal carbon onions with uniform particle size, the method is realized according to the following steps:

[0020] Step 1. Weigh the Prussian blue and place it in a tube furnace, heat and crack it under the condition of nitrogen protection, and cool to room temperature under the condition of nitrogen protection after the heating and cracking is completed, so as to obtain the crude product of inner-coated iron metal carbon onion; the heating and cracking process It is: heat up from room temperature to 350°C to 450°C at a heating rate of 1.5°C / min to 2.5°C / min and keep warm for 1h to 3h, then raise the temperature to 800°C to 1100°C at a heating rate of 0.5°C / min to 2°C / min Keep warm for 3h~6h;

[0021] Step 2. Put the crude iron metal carbon onion prepared in step 1 into dilute hydrochloric acid, heat and reflux for 6h to 10h, then centrifuge to obtain the precipitate, wash with d...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment is different from Embodiment 1 in that: the particle size of the Prussian blue in Step 1 is 400nm-600nm. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the drying process described in step 2 is to place the sediment in a blast dryer and dry it at 80° C. for 10 hours. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing Fe-encapsulating metal carbon onions with even particle size through the macroscopic quantity and relates to a method for preparing the Fe-encapsulating metal carbon onions. The problems that an existing method for preparing the Fe-encapsulating metal carbon onions is high in cost, low in yield and purity, rigorous in reaction condition, and large in harm to environment and testers, and the product appearance is difficult to control are solved. The preparation method comprises the steps that 1, prussian blue is heated and split; 2, heating reflux is conducted in diluted hydrochloric acid, and then centrifugation, washing with distilled water and drying are conducted; and 3, annealing is conducted in a muffle furnace. The method has the advantages that the cost is low, the yield is high, the reaction conditions are mild, and harm to environment and testers is small. The method is used for preparation of the Fe-encapsulating metal carbon onions.

Description

technical field [0001] The invention relates to a method for macro-preparing iron-metal-coated carbon onions with uniform particle diameters. Background technique [0002] Carbon onion is a zero-dimensional (0D) spherical carbon nanomaterial, which was discovered in 1992 by Wu Jiate, who observed carbon soot irradiated by high-energy electron beams. The discovery is of great significance: it shows that there is a reaction mechanism to reduce the gap bond at the edge of carbon nanomaterials, and the perfect structure with the lowest carbon energy is not a two-dimensional plane, but a three-dimensional spherical shape, which has aroused strong attention in the fields of basic and technical science . The difference in the number of carbon onion layers, the type of core, and its synthetic precursors lead to very different physical properties, which determine the diversity of its applications. With the deepening of research, carbon onion has gradually emerged in the application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30B22F1/02B82Y40/00
CPCB82Y40/00B22F9/30B22F1/0553B22F1/07B22F1/065B22F1/16
Inventor 冷劲松刘彦菊张志春阮超李志刚
Owner HARBIN INST OF TECH
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