Preparation method of bismuth oxide composite visible light catalytic material loaded with CdS quantum dots and product prepared by preparation method

A catalytic material, bismuth oxide technology, applied in the field of photocatalytic materials, can solve the problems of poor photoresponse and limitations, and achieve the effects of good dispersion, uniform particles and high photocatalytic activity

Active Publication Date: 2021-09-03
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, single-phase bismuth oxide has a high recombination rate of photogenerated charges and poor response to visible light, which limits its photocatalytic pollution control ability.

Method used

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  • Preparation method of bismuth oxide composite visible light catalytic material loaded with CdS quantum dots and product prepared by preparation method
  • Preparation method of bismuth oxide composite visible light catalytic material loaded with CdS quantum dots and product prepared by preparation method
  • Preparation method of bismuth oxide composite visible light catalytic material loaded with CdS quantum dots and product prepared by preparation method

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Experimental program
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Embodiment 1

[0023] In this embodiment, a method for preparing a bismuth oxide composite visible light catalytic material loaded with CdS quantum dots, the steps are as follows:

[0024] (1) Synthesis of Bi with Bi-MOF as precursor 2 o 3

[0025] (1-1) 0.45gBi(NO 3 ) 3 ·5H 2 O and 2.25g trimesic acid (H 3 BTC) is dissolved in the DMF solution of 180mL methanol (according to the volume ratio DMF: methanol=4: 1), after magnetic stirring 30min, obtain mixed solution;

[0026] (1-2) Transfer the above mixed solution into a reaction kettle and react at 120°C for 24 hours. After the reaction product is cooled, wash it with DMF and methanol for 3 times, and then put it in a vacuum oven at 60°C. Dry for 10 hours to obtain a white Bi-MOF precursor;

[0027] (1-3) Put the above-mentioned Bi-MOF precursor in a muffle furnace, and calcinate it at 500°C for 2 hours in an air atmosphere to obtain light yellow Bi 2 o 3 product;

[0028] (2)CdS@Bi 2 o 3 Preparation of Composite Visible Light C...

Embodiment 2

[0031] In this embodiment, a method for preparing a bismuth oxide composite visible light catalytic material loaded with CdS quantum dots, the steps are as follows:

[0032] (1) Synthesis of Bi with Bi-MOF as precursor 2 o 3

[0033] (1-1) 0.45gBi(NO 3 ) 3 ·5H 2 O and 2.25g trimesic acid (H 3 BTC) is dissolved in the DMF solution of 180mL methanol (according to the volume ratio DMF: methanol=4: 1), after magnetic stirring 30min, obtain mixed solution;

[0034] (1-2) Transfer the above mixed solution into a reaction kettle and react at 130°C for 20 hours. After the reaction product is cooled, wash it with DMF and methanol for 3 times, and then put it in a vacuum oven at 60°C. Dry for 10 hours to obtain a white Bi-MOF precursor;

[0035] (1-3) Put the above-mentioned Bi-MOF precursor in a muffle furnace and calcinate it at 520°C for 2 hours in an air atmosphere to obtain light yellow Bi 2 o 3 product;

[0036] (2)CdS@Bi 2 o 3 Preparation of Composite Visible Light Ca...

Embodiment 3

[0039] In this embodiment, a method for preparing a bismuth oxide composite visible light catalytic material loaded with CdS quantum dots, the steps are as follows:

[0040] (1) Synthesis of Bi with Bi-MOF as precursor 2 o 3

[0041] (1-1) 0.45gBi(NO 3 ) 3 ·5H 2 O and 2.25g trimesic acid (H 3 BTC) is dissolved in the DMF solution of 180mL methanol (according to the volume ratio DMF: methanol=4: 1), after magnetic stirring 30min, obtain mixed solution;

[0042] (1-2) Transfer the above mixed solution into a reaction kettle and react at 140°C for 12 hours. After the reaction product is cooled, it is washed with DMF and methanol for 3 times, and then placed in a vacuum oven at 60°C. Dry for 10 hours to obtain a white Bi-MOF precursor;

[0043] (1-3) Put the above-mentioned Bi-MOF precursor in a muffle furnace, and calcinate it at 550°C for 2 hours in an air atmosphere to obtain light yellow Bi 2 o 3 product;

[0044] (2)CdS@Bi 2 o 3 Preparation of Composite Visible Ligh...

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Abstract

The invention discloses a preparation method of a bismuth oxide composite visible light catalytic material loaded with CdS quantum dots, which comprises the following steps: firstly synthesizing Bi2O3 by taking Bi-MOF as a precursor; then loading cadmium sulfide quantum dots on the surface of bismuth oxide by taking Bi2O3 and cadmium acetate dihydrate as raw materials and adopting an in-situ oil bath method to synthesize the bismuth oxide composite visible light catalytic material loaded with the CdS quantum dots. In addition, the invention also discloses a product prepared by the preparation method. The prepared bismuth oxide composite visible light catalytic material is of a rod-shaped structure, the CdS quantum dots are evenly dispersed on the surface of the rod-shaped bismuth oxide structure, the specific surface area of the material is effectively increased, more active sites are exposed, and therefore the visible light catalytic performance of the material is effectively improved.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a method for preparing a supported bismuth oxide composite visible photocatalytic material and a product thereof. Background technique [0002] At present, with the continuous development of modern industrial technology, more and more pollutants are discharged into aquatic ecosystems. Among them, the pollution of organic dyes occupies a dominant position, however, the traditional water treatment process is not effective in its treatment. Therefore, there is an urgent need to develop efficient degradation technologies for removing organic dye pollutants in water. Among many advanced water treatment technologies, photocatalytic technology is widely favored by researchers due to its high efficiency, green and environmental protection. [0003] Photocatalytic materials can be roughly divided into seven categories, namely metal oxides, metal sulfides, Bi-based photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J37/08B01J37/20C02F1/30C02F101/36C02F101/38
CPCB01J27/04B01J35/004B01J35/0013B01J37/086B01J37/20C02F1/30C02F2101/36C02F2101/38C02F2101/40C02F2305/10C02F2101/308Y02W10/37
Inventor 廖润华任婉璐肖林锋
Owner JINGDEZHEN CERAMIC INSTITUTE
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