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Visible-light-induced photocatalyst and green synthesis method and application thereof

A synthesis method and green synthesis technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the influence of semiconductor photocatalyst energy band structure, fast recombination of photogenerated carriers, interlayer structure Easy to accumulate and aggregate to achieve the effect of broadening the photoresponse range, obvious degradation effect, and increasing active sites

Active Publication Date: 2020-06-26
SOUTH CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional photocatalytic reaction effect is often affected by the light intensity of the light source, the pH of the solution, and the energy band structure of the semiconductor photocatalyst.
And although hydrotalcite itself has a certain catalytic ability, it participates in the photocatalytic reaction as a photocatalyst, and the photogenerated carriers often recombine quickly inside it, and the interlayer structure is easy to accumulate and aggregate. Under the condition of acting as a photocatalyst, the demand for photocatalytic reaction cannot be met, so a suitable method is needed to improve the catalytic performance of hydrotalcite

Method used

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  • Visible-light-induced photocatalyst and green synthesis method and application thereof
  • Visible-light-induced photocatalyst and green synthesis method and application thereof
  • Visible-light-induced photocatalyst and green synthesis method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: Preparation of ZnAlTi-composite hydrotalcite-like material

[0029] Add zinc oxide, aluminum oxide, and titanium dioxide into the ball milling tank so that the molar ratio of Zn:Al:Ti is 2:1:2; add ball milling beads so that the mass ratio of ball milling beads to raw materials is 49:1. The product: the initial product is washed, centrifuged, dried, and sieved to obtain a ZnAlTi-composite hydrotalcite material.

[0030] The prepared ZnAlTi-composite hydrotalcite-like material photocatalytically degrades tetracycline, comprising the following steps:

[0031] Take 200mL of the tetracycline background stock solution with an initial concentration of 10mg / L, add the ZnAlTi-composite hydrotalcite-like material prepared in Example 1, the amount of the material is 0.4g / L, and adjust the pH value of the solution to 7.0. Under a 30W LED light source, magnetically stirred for 180 minutes, followed by a dark reaction for 30 minutes, followed by a photocatalytic react...

Embodiment 2

[0040] Embodiment 2: Preparation of ZnAlTi / graphene oxide composite hydrotalcite-like material

[0041]Add zinc oxide, aluminum oxide, and titanium dioxide into the ball mill jar so that the Zn:Al:Ti molar ratio is 2:1:2; take 1.25mL of graphene oxide dispersion (Graphene oxide, GO) with a concentration of 10mg / L, and Add to the ball mill tank; add ball mill beads so that the mass ratio of the ball mill beads to the above three mixed raw materials is 49:1, and obtain the primary product after high-speed ball milling for 5 hours; wash the primary product, centrifuge, dry, and sieve to obtain ZnAlTi / graphite oxide Alkene composite hydrotalcite-like materials.

[0042] The prepared ZnAlTi / graphene oxide composite hydrotalcite-like material photocatalytically degrades tetracycline, comprising the following steps:

[0043] Take 200mL of the tetracycline background stock solution with an initial concentration of 10mg / L, add the ZnAlTi / graphene oxide composite hydrotalcite-like mate...

Embodiment 3

[0052] Example 3: Preparation of ZnAlTi / graphene oxide composite hydrotalcite-like material

[0053] Add zinc oxide, aluminum oxide, and titanium dioxide into the ball mill jar so that the Zn:Al:Ti molar ratio is 2:1:2; take 2.5mL of graphene oxide dispersion (Graphene oxide, GO) with a concentration of 10mg / L, and Add to the ball mill tank; add ball mill beads so that the mass ratio of the ball mill beads to the above three mixed raw materials is 49:1, and obtain the primary product after high-speed ball milling for 5 hours; wash the primary product, centrifuge, dry, and sieve to obtain ZnAlTi / graphite oxide Alkene composite hydrotalcite-like materials.

[0054] The prepared ZnAlTi / graphene oxide composite hydrotalcite-like material photocatalytically degrades rhodamine B, comprising the following steps:

[0055] Get 200mL of rhodamine B background stock solution whose initial concentration is 5mg / L, add the ZnAlTi / graphene oxide composite hydrotalcite-like material obtained...

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Abstract

The invention belongs to the field of environmental water treatment, and discloses a visible-light-induced photocatalyst and a green synthesis method thereof. The green synthesis method comprises thefollowing steps: (1) mixing zinc oxide, alumina and titanium dioxide; then carrying out high-energy ball milling treatment to obtain a primary product; and (2) washing, carrying out solid-liquid separation, drying and sieving to obtain the composite hydrotalcite-like material, namely the visible-light-induced photocatalyst. The preparation method is simple and convenient to operate, energy consumption required in the preparation process is low, no wastewater is generated, and large-scale application can be achieved. The catalyst is used for degrading antibiotics or organic dyes under visible light, a photocatalyst can be directly added into a photocatalytic reaction under the condition of a low-energy LED (30W) light source for a stirring reaction, and a good effect of degrading tetracycline and rhodamine B is achieved. The whole treatment process is simple and convenient to operate, low in cost and obvious in efficiency.

Description

technical field [0001] The invention belongs to the field of environmental water treatment and relates to a visible light catalyst and its green synthesis method and application. Background technique [0002] With the rise of various emerging industries, when people are enjoying various benefits brought by economic prosperity, various increasingly serious pollution problems have also become difficult problems that people need to solve urgently. Among them, the global water pollution problem caused by the massive discharge of various domestic sewage and industrial and commercial wastewater containing high concentrations of organic pollutants has attracted widespread attention from all over the world. [0003] Photocatalytic reaction is an advanced green oxidation technology. It is energy-saving and environmentally friendly, easy to operate, stable in performance, and mild in reaction conditions. It performs well in degrading organic pollutants in sewage. The performance of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J35/00B01J37/00C02F1/30C02F101/34C02F101/38C02F101/30
CPCB01J37/0036B01J23/06B01J23/007C02F1/30C02F2305/10C02F2101/308C02F2101/34C02F2101/38B01J35/39Y02W10/37
Inventor 黄柱坚吴思颖谢晓敏陈紫盈郑芊
Owner SOUTH CHINA AGRI UNIV
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