Phosphorus-doped carbon dot photocatalytic material based on fly ash as well as preparation method and application of phosphorus-doped carbon dot photocatalytic material

A technology of photocatalytic materials and fly ash, which is applied in the field of photocatalytic materials, can solve the problems of inefficient utilization of metal elements, complicated preparation methods, and high costs, and achieve remarkable photocatalytic effects, high recycling rates, and stable properties. Effect

Pending Publication Date: 2022-04-22
CHENGDU TECHCAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, although the utilization rate of fly ash has gradually increased, many useful metal elements in fly ash have not been efficiently utilized, and there are problems of complicated preparation methods and high costs.

Method used

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  • Phosphorus-doped carbon dot photocatalytic material based on fly ash as well as preparation method and application of phosphorus-doped carbon dot photocatalytic material
  • Phosphorus-doped carbon dot photocatalytic material based on fly ash as well as preparation method and application of phosphorus-doped carbon dot photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example provides a method for preparing a phosphorus-doped carbon dot photocatalytic material based on fly ash. The specific steps are as follows: 5.0 g of sucrose is added to 10 ml of ultrapure water for ultrasonic dissolution for 10 minutes, and 2 ml of phosphoric acid (density of 1.874 g / mL) is added. After mixing, add 2g of fly ash and stir thoroughly, ultrasonic again for 10min, microwave (microwave power 700W) treatment for 4min (during the microwave process, about 1.5min, the reaction solution is burned dry, the material begins to expand, hydrogen gas is generated inside, and a micro-explosion is formed. , sparks splashed, producing a large number of pores, which grow layer by layer, forming a porous mushroom cloud-like material, such as figure 1 and figure 2 shown), after cooling to room temperature, mash and grind, wash, centrifuge, and dry at 60°C for 9 hours to obtain the final phosphorus-doped carbon dot photocatalytic material, which has a very large...

Embodiment 2

[0025] This example provides a method for preparing a phosphorus-doped carbon dot photocatalytic material based on fly ash. The only difference from Example 1 is that the masses of sucrose, phosphoric acid and fly ash are 7g, 5g and 2g respectively, and the remaining steps and The parameters are all the same.

experiment example 1

[0031] In this example, 50mg of rhodamine B was weighed and added to 50ml of ultrapure water for ultrasonic dissolution for 10min. Into 25mL of diluted rhodamine B solution, carry out dark reaction and light reaction for 2 hours respectively; measure the absorbance, calculate the degradation rate of rhodamine B, and the results are shown in Table 1.

[0032] Table 1

[0033] Numbering Degradation rate(%) Example 1 99％ Example 2 98.5％ Comparative example 1 75％ Comparative example 2 35％

[0034] On the basis of the above experimental steps, rhodamine B was adjusted to methylene blue for experimentation, and the degradation rate of methylene blue was finally measured as shown in Table 2.

[0035] Table 2

[0036] Numbering Degradation rate(%) Example 1 99％ Example 2 98.8％ Comparative example 1 68％ Comparative example 2 41％

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Abstract

The invention discloses a phosphorus-doped carbon dot photocatalytic material based on fly ash and a preparation method and application of the phosphorus-doped carbon dot photocatalytic material based on fly ash, and belongs to the technical field of photocatalytic materials. A blocky graphite-like carbon nano material formed by cane sugar and phosphoric acid is attached to the spherical surface of fly ash to form a multi-layer structure of carbon layer loaded fly ash loaded phosphating carbon dots, the carbonized material has strong adsorption capacity on pollutants, and nano-scale carbon can be attached to a substrate material by adding phosphoric acid, so that the adsorption capacity of the carbon layer loaded phosphating carbon dots is improved. The metal ions on the fly ash can play a role in assisting catalysis, a semiconductor-like material is formed, and the photocatalytic degradation effect of the fly ash is achieved.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a phosphorus-doped carbon dot photocatalytic material based on fly ash and its preparation method and application. Background technique [0002] Fly ash is a powdery solid waste produced in the combustion process of coal energy production, commonly known as fly ash (FA). The output of fly ash is huge. The annual discharge of fly ash in the world is about 500 million tons. 30% of the world's total. Therefore, the comprehensive utilization of fly ash has attracted great attention from various countries. At present, fly ash is mainly used in building bricks, cement raw materials, roadbed materials, soil improvers and rubber fillers in my country, but its high comprehensive utilization rate can only reach 70%, and the average comprehensive utilization rate is only 30%. far below the level of developed countries. Therefore, it has become an urgent task to develop ot...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J35/10B01J37/34B01J37/06A62D3/17A62D101/20A62D101/26A62D101/28
CPCB01J27/1853B01J37/343B01J37/0036B01J37/06A62D3/17A62D2101/20A62D2101/26A62D2101/28B01J35/39B01J35/618Y02W10/37
Inventor 景江罗凌志何思雨王冠龙刘耀琦蒋婷婷朱星宇黄作军王付军吴勇倪家明冯仲康
Owner CHENGDU TECHCAL UNIV
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