Transition metal doped carbon microsphere as well as preparation method and application thereof

A transition metal, transition metal salt technology, applied in the directions of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve problems such as cumbersome methods, achieve uniform distribution, increased pore structure, good The effect of adsorption performance

Active Publication Date: 2021-02-09
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these methods are a bit cumbersome

Method used

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  • Transition metal doped carbon microsphere as well as preparation method and application thereof
  • Transition metal doped carbon microsphere as well as preparation method and application thereof
  • Transition metal doped carbon microsphere as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This example relates to the preparation of Mn-doped carbon spheres (Mn-CS) and the control sample Mn-doped carbon material (Mn-C), and the non-destructive activation of Mn-CS by potassium oxalate to prepare Mn-ACS.

[0044] 4 parts by mass of sucrose, 1 part by mass of KMnO 4 , 3 parts by mass of APS (ammonium persulfate) were dissolved in 40 parts by volume of water, and then the mixed solution was transferred to a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, placed in a hot air oven and heated to 180 ° C and then kept warm React for 4 hours; filter the reaction solution, wash the filter cake three times with water and ethanol, and dry it in a hot air oven at 80°C for 8 hours, and name it as Mn-CS. The Mn content therein is 0.89wt%.

[0045] A control sample Mn-C was prepared in the same manner as above without adding APS. Follow the same method as above without adding KMnO 4 A control sample CS was prepared with APS.

[0046] The SEM com...

Embodiment 2

[0050] This example relates to the preparation of Mn-doped carbon spheres (Mn-CS), and the nondestructive activation of Mn-CS by potassium oxalate to prepare Mn-ACS.

[0051] 4 mass parts of sucrose, 4 mass parts of KMnO 4 1. Dissolve 5 parts by mass of APS in 40 parts by volume of water, then transfer the mixed solution into a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, place it in a hot air oven and heat it up to 180°C, then keep it warm for 4 hours; filter the reaction solution , the filter cake was washed three times with water and ethanol, and then dried in a hot air oven at 80 °C for 8 h, named Mn-CS. The Mn content therein is 2.31 wt%.

[0052] Take 1 mass part of the Mn-CS sample, mix it with 3 mass parts of potassium oxalate, transfer it into a ceramic boat, and place it in a tube furnace, pass in nitrogen to replace the air in the furnace, and then adjust the nitrogen flow rate to 30mL / min. Raise to 800°C at a heating rate of 3°C / min, ba...

Embodiment 3

[0056] This example relates to the preparation of V-doped carbon spheres (V-CS) and the control sample V-doped carbon material (V-C), and the non-destructive activation of V-CS by potassium oxalate to prepare V-ACS.

[0057] 4 parts by mass of sucrose, 1 part by mass of Na 3 VO 4 1. Dissolve 3 parts by mass of APS in 40 parts by volume of water, then transfer the mixed solution into a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, place it in a hot air oven, heat it up to 180°C, and keep it warm for 4 hours; After filtration, the filter cake was washed three times with water and ethanol respectively, and then the filter cake was dried in a hot air oven at 80°C for 8 hours, and named as V-CS. The V content therein is 2.59wt%.

[0058] Without adding APS, control samples V-C were prepared according to the same method. The SEM comparison photos of V-CS and V-C are as follows Figure 5 As shown, V-CS is smooth spherical, and V-C is fused irregular bloc...

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Abstract

The invention discloses a transition metal doped carbon microsphere as well as a preparation method and application thereof. The transition metal doped carbon sphere has a uniform solid porous structure, and transition metal is uniformly distributed in the carbon sphere. The preparation method comprises the steps of preparing carbon microspheres uniformly doped with manganese, vanadium, molybdenumand tungsten by a one-step hydrothermal method, mixing the carbon microspheres with potassium oxalate, and roasting in a protective atmosphere to obtain activated metal-doped carbon spheres. The doped transition metal elements are still kept in a uniformly dispersed state after being roasted and are not aggregated. The prepared transition metal doped carbon microspheres show good adsorption performance on heavy metal ions Cr(VI), and the maximum adsorption capacity can reach 660.7 mg/g; and deep removal of Cr(VI)-containing wastewater with the initial concentration lower than 200 mg/L can beachieved, the residual concentration of Cr(VI) after adsorption is lower than 0.05 mg/L, and the good application prospect of the transition metal doped carbon microspheres in the field of heavy metalwastewater treatment is shown.

Description

technical field [0001] The invention belongs to the technical field of adsorption and separation materials, and in particular relates to a carbon microsphere doped with a transition metal and a preparation method and application thereof. Background technique [0002] At present, the problem of water pollution is becoming more and more prominent. Among them, the sewage of heavy metal ions such as Cr(VI) in metal processing and other industries has attracted attention because of its strong toxicity, easy penetration into the soil, and entry into the food chain. There are many treatment methods for heavy metal ion sewage. Among them, the adsorption method to remove heavy metal ions has the advantages of simple operation, low cost, and strong practicability. However, general adsorbents are difficult to achieve deep removal of heavy metal ions in sewage. Therefore, an adsorbent with both high adsorption capacity and trace removal effect has become a major difficulty in research....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/28C02F1/28C02F101/22
CPCB01J20/20B01J20/28019C02F1/283B01J20/0222B01J20/0214B01J20/0218B01J20/28066C02F2101/22Y02W10/37
Inventor 蔡卫权刘裴
Owner GUANGZHOU UNIVERSITY
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