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Ultrathin graphite phase C3N4/calcite nanosheet composite material as well as preparation method and application thereof

A C3N4, composite material technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., to achieve the effect of improving removal rate, expanding growth area, and preventing secondary pollution

Active Publication Date: 2019-01-01
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there is no combination of calcite and ultrathin g-C in the prior art. 3 N 4 This class of materials composited by nanosheets, therefore, by ultrathin g-C 3 N 4 Combining with calcite, increasing the specific surface area of ​​calcite, increasing more active sites for Cd(II) adsorption, and further improving the removal rate of Cd(II) in wastewater has broad market prospects

Method used

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  • Ultrathin graphite phase C3N4/calcite nanosheet composite material as well as preparation method and application thereof
  • Ultrathin graphite phase C3N4/calcite nanosheet composite material as well as preparation method and application thereof
  • Ultrathin graphite phase C3N4/calcite nanosheet composite material as well as preparation method and application thereof

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Embodiment 1

[0032] An ultrathin graphite phase C 3 N 4 / calcite nanosheet composite material, which is based on ultrathin graphite phase C 3 N 4 as the carrier, and the ultrathin graphite phase C 3 N 4 Calcite nanosheets are loaded and modified on the carrier. Among them, the ultrathin graphite phase C 3 N 4 It is a two-dimensional layered nanosheet structure (2D structure), the calcite nanosheet is a 3D structure, and the loading amount of the calcite nanosheet is 29% of the mass of the carrier.

[0033] The above ultrathin graphite phase C 3 N 4 / The preparation method of calcite nano sheet composite material, comprises the following steps:

[0034] (1) Block graphite phase C 3 N 4 Preparation: Put 80g of melamine into a crucible, heat up to 500°C in a muffle furnace at a heating rate of 2°C / min, keep the constant temperature for 2 hours, and then drop to normal temperature at the same cooling rate to obtain a light yellow powder that is a block graphite phase C 3 N 4 ; ...

Embodiment 2

[0042] An ultrathin graphite phase C 3 N 4 / calcite nanosheet composite material, which is based on ultrathin graphite phase C 3 N 4 as the carrier, and the ultrathin graphite phase C 3 N 4 Calcite nanosheets are loaded and modified on the carrier. Among them, the ultrathin graphite phase C3 N 4 It is a two-dimensional layered nanosheet structure (2D structure), the calcite nanosheet is a 3D structure, and the loading amount of the calcite nanosheet is 37% of the mass of the carrier.

[0043] The above ultrathin graphite phase C 3 N 4 / The preparation method of calcite nano sheet composite material, comprises the following steps:

[0044] (1) Block graphite phase C 3 N 4 Preparation of melamine: put 90g of melamine into a crucible, raise the temperature to 600°C in a muffle furnace at a heating rate of 4°C / min, keep the temperature at a constant temperature for 3 hours, and then lower it to normal temperature at the same cooling rate to obtain a light yellow powder ...

Embodiment 3

[0054] An ultrathin graphite phase C 3 N 4 / calcite nanosheet composite material, which is based on ultrathin graphite phase C 3 N 4 as the carrier, and the ultrathin graphite phase C 3 N 4 Calcite nanosheets are loaded and modified on the carrier. Among them, the ultrathin graphite phase C 3 N 4 It is a two-dimensional layered nanosheet structure (2D structure), the calcite nanosheet is a 3D structure, and the loading amount of the calcite nanosheet is 22% of the mass of the carrier.

[0055] The above ultrathin graphite phase C 3 N 4 / The preparation method of calcite nano sheet composite material, comprises the following steps:

[0056] (1) Block graphite phase C 3 N 4 Preparation: Put 100g of melamine into a crucible, heat up to 650°C in a muffle furnace at a heating rate of 6°C / min, keep the temperature at a constant temperature for 4 hours, and then drop to normal temperature at the same cooling rate to obtain a light yellow powder that is a block graphite p...

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Abstract

The invention discloses an ultrathin graphite phase C3N4 / calcite nanosheet composite material, an ultrathin graphite phase C3N4 is as a carrier by the composite material, and the ultrathin graphite phase C3N4 carrier is loaded with calcite nanosheets. The invention also provides a preparation method of an ultrathin graphite phase C3N4 / calcite nanosheet composite material, comprising the followingsteps: (1) preparing an ultrathin graphite phase C3N4 carrier suspension; (2) mixing a Ca<2+> solution and the ultrathin graphite phase C3N4 carrier suspension obtained in step (1) uniformly, ultrasonically treating to obtain a mixed solution, and then introducing CO2 for reaction, centrifuging after the reaction is completed, collecting the precipitate, and drying to obtain the ultrathin graphitephase C3N4 / calcite nanosheet composite material. The ultrathin graphite phase C3N4 / calcite nanosheet composite material of the invention can provide more active sites for adsorbing Cd<2+>, and can greatly improve the removal rate of Cd<2+> in wastewater.

Description

technical field [0001] The invention belongs to the field of functional composite material adsorbents, in particular to a composite material for adsorbing cadmium in waste water, a preparation method and application thereof. Background technique [0002] Cadmium is a heavy metal element with high toxicity. The air and food polluted by cadmium are seriously harmful to the human body, and the metabolism in the human body is slow. Cadmium will not be degraded by microorganisms in the water body, has the potential to accumulate, and will accumulate in the human body, thereby causing chronic liver, kidney, nervous and cardiovascular system diseases. Therefore, it is very important to find a green and efficient method to remove cadmium to an acceptable level. At present, adsorption is generally considered as one of the most promising technologies, which can effectively remove soluble and insoluble pollutants without producing dangerous by-products. [0003] Carbonates are consid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/28B01J20/30C02F1/28C02F1/38C02F1/52C02F101/20
CPCB01J20/02B01J20/043B01J20/28007B01J20/28035C02F1/281C02F1/38C02F1/5236C02F2101/20
Inventor 王文磊杨田丽黄自知文瑞芝王琼贺任邓明向胡云楚
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY