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Ultrathin graphite phase c 3 no 4 /Calcite nano sheet composite material and its preparation method and application

A technology of C3N4 and composite materials, applied in chemical instruments and methods, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of improving removal rate, preventing secondary pollution, and stabilizing structure

Active Publication Date: 2021-04-20
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 c <sub>3</sub> no <sub>4</sub> /Calcite nano sheet composite material and its preparation method and application
  • Ultrathin graphite phase c <sub>3</sub> no <sub>4</sub> /Calcite nano sheet composite material and its preparation method and application
  • Ultrathin graphite phase c <sub>3</sub> no <sub>4</sub> /Calcite nano sheet composite material and its preparation method and application

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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 temperature at a 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 ph...

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 4Calcite 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 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 ultra-thin graphite phase C 3 N 4 / calcite nanosheet composite material, the composite material with ultrathin graphite phase C 3 N 4 As a carrier, the ultrathin graphite phase C 3 N 4 Calcite nanosheets are loaded on the carrier. The present invention also provides a kind of ultra-thin graphite phase C 3 N 4 / The preparation method of calcite nano sheet composite material, comprises the following steps: (1) prepare ultra-thin graphite phase C 3 N 4 Carrier suspension; (2) Ca 2+ Ultrathin graphite phase C obtained in solution and step (1) 3 N 4 The carrier suspension was mixed evenly, and the mixed solution was obtained by ultrasonic treatment, and then CO 2 After the reaction, centrifuge after the completion of the reaction, collect the precipitate and dry it to obtain the ultra-thin graphite phase C 3 N 4 / Calcite nanosheet composites. Ultrathin graphite phase C of the present invention 3 N 4 / Calcite nanosheet composites can be used for adsorbing Cd 2+ Provide more active sites, can greatly improve the Cd in wastewater 2+ removal rate.

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 Patents(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