Bi-MOF-M/Bi2MoO6 visible-light-driven photocatalyst capable of efficiently degrading organic wastewater and preparation method of Bi-MOF-M/Bi2MoO6 visible-light-driven photocatalyst

A technology of organic wastewater and catalysts, which is applied in the field of environment and energy, can solve the problems that nano photocatalysts are difficult to recycle and reuse, photogenerated carriers are easy to recombine, and are not easy to recycle, so as to achieve good industrial application prospects, improve visible light catalytic performance, and improve The effect of absorption strength

Active Publication Date: 2021-10-26
JIANGNAN UNIV
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Problems solved by technology

[0006] In order to solve the two major technical problems that the photogenerated carriers of the existing photocatalysts are easy to recombine and the nanophotocatalysts are difficult to recycle and use, the present invention prepares a micro-nano hierarchical structure Bi- MOF microspheres (Bi-MOF-M), and then grow a layer of petal-like Bi on the surface of Bi-MOF-M by homologous growth method 2 MoO 6 , to prepare chemically bonded heterojunction composite photocatalyst Bi-MOF-M / Bi 2 MoO 6 , the prepared Bi-MOF-M / Bi 2 MoO 6 The composite photocatalyst has a micro-nano hierarchical flower spherical structure, which can not only maintain the high activity advantages of nano-scale particles, but also overcome the defects that nano-scale materials are easy to agglomerate and difficult to recycle; the formed chemically bonded heterojunction can not only effectively broaden the The spectral absorption range of the obtained composite photocatalyst and its absorption intensity can be improved, and the separation of photogenerated electrons and holes can be effectively promoted by forming a favorable interface electric field, thereby greatly improving the visible light catalytic performance of the obtained composite photocatalyst

Method used

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  • Bi-MOF-M/Bi2MoO6 visible-light-driven photocatalyst capable of efficiently degrading organic wastewater and preparation method of Bi-MOF-M/Bi2MoO6 visible-light-driven photocatalyst
  • Bi-MOF-M/Bi2MoO6 visible-light-driven photocatalyst capable of efficiently degrading organic wastewater and preparation method of Bi-MOF-M/Bi2MoO6 visible-light-driven photocatalyst
  • Bi-MOF-M/Bi2MoO6 visible-light-driven photocatalyst capable of efficiently degrading organic wastewater and preparation method of Bi-MOF-M/Bi2MoO6 visible-light-driven photocatalyst

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Experimental program
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Embodiment 1

[0039] This embodiment is Bi-MOF-M / Bi 2 MoO 6 Preparation and application of visible light catalysts. The specific process is:

[0040] Preparation of Bi-MOF microspheres (Bi-MOF-M): 1 mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 40 mL of ethylene glycol to obtain A; 1 mmol of terephthalic acid was dissolved in 30 mL of N,N-dimethylformamide to obtain B, and the obtained B was added dropwise to A, and stirred at room temperature for 1 h, Then transferred to a hydrothermal reaction kettle, reacted at 120°C for 12h, after the reaction, naturally cooled to room temperature, filtered, washed once with deionized water, washed once with ethanol, and dried in vacuum at 50°C to obtain the Bi-MOF Microspheres (Bi-MOF-M);

[0041] Bi-MOF-M / Bi 2 MoO 6 Preparation of visible light catalyst: 0.1g of Bi-MOF-M was ultrasonically dispersed in 40mL of ethanol to obtain A; 0.1mmol of Na 2 MoO 4 2H 2 O was dissolved in 20mL of ethylene glycol to obtain B, and the obtained B was added ...

Embodiment 2

[0045] This embodiment is Bi-MOF-M / Bi 2 MoO 6 Preparation and application of visible light catalysts. The specific process is:

[0046] Preparation of Bi-MOF microspheres (Bi-MOF-M): 5 mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 40 mL of ethylene glycol to obtain A; 5 mmol of terephthalic acid was dissolved in 30 mL of N,N-dimethylformamide to obtain B, and the obtained B was added dropwise to A, and stirred at room temperature for 3 h, Then transferred to a hydrothermal reaction kettle, reacted at 160°C for 18h, after the reaction, naturally cooled to room temperature, filtered, washed twice with deionized water, washed twice with ethanol, and dried in vacuum at 80°C to obtain the Bi-MOF Microspheres (Bi-MOF-M);

[0047] Bi-MOF-M / Bi 2 MoO 6 Preparation of visible light catalyst: 0.3g of Bi-MOF-M was ultrasonically dispersed in 40mL of ethanol to obtain A; 0.5mmol of Na 2 MoO 4 2H 2 O was dissolved in 20mL of ethylene glycol to obtain B, and the obtained B was adde...

Embodiment 3

[0051] This embodiment is Bi-MOF-M / Bi 2 MoO 6 Preparation and application of visible light catalysts. The specific process is:

[0052] Preparation of Bi-MOF microspheres (Bi-MOF-M): 2 mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 40 mL of ethylene glycol to obtain A; 3 mmol of terephthalic acid was dissolved in 30 mL of N,N-dimethylformamide to obtain B, and the obtained B was added dropwise to A, and stirred at room temperature for 2 h, Then transferred to a hydrothermal reaction kettle, reacted at 150°C for 16h, after the reaction, naturally cooled to room temperature, filtered, washed twice with deionized water, washed twice with ethanol, and dried in vacuum at 60°C to obtain the Bi-MOF Microspheres (Bi-MOF-M);

[0053] Bi-MOF-M / Bi 2 MoO 6 Preparation of visible light catalyst: 0.2g of Bi-MOF-M was ultrasonically dispersed in 40mL of ethanol to obtain A; 0.3mmol of Na 2 MoO 4 2H 2 O was dissolved in 20mL of ethylene glycol to obtain B, and the obtained B was adde...

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Abstract

The invention discloses a Bi-MOF-M / Bi2MoO6 visible-light-driven photocatalyst capable of efficiently degrading organic wastewater and a preparation method of the Bi-MOF-M / Bi2MoO6 visible-light-driven photocatalyst, and belongs to the technical field of environment and energy. According to the preparation method, Bi-MOF-M microspheres are prepared through self-assembly, a layer of petal-shaped Bi2MoO6 is grown on the surface layers of the Bi-MOF-M microspheres through interface in-situ growth, chemical bonding type heterojunctions are formed, and the micro-nano graded flower-ball-shaped Bi-MOF-M / Bi2MoO6 visible-light-driven photocatalyst is prepared. The obtained composite visible-light-driven photocatalyst is easy and convenient to prepare, environmentally friendly, high in stability, free of residues in waste water, high in visible-light catalytic activity, capable of efficiently degrading various organic dye waste water and high-concentration antibiotic waste water under irradiation of visible light, simple in waste water treatment process, capable of being recycled and reused, capable of greatly reducing cost and suitable for industrial production, and has good industrial application prospects.

Description

technical field [0001] The invention relates to a Bi-MOF-M / Bi that efficiently degrades organic wastewater 2 MoO 6 A visible light catalyst and a preparation method thereof belong to the technical field of environment and energy. Background technique [0002] With the rapid development of modern industry, the number and types of organic pollutants that are difficult to biodegrade are increasing, which has a great impact on the natural ecological environment, people's life and health, especially the chemical, printing and dyeing and pharmaceutical industries. Pollutants have gradually increased with the development of society. Affected by technical and economic factors, the current wastewater treatment still mainly adopts chemical and physical methods, but this can no longer meet the current high efficiency and high requirements for pollutant treatment. The organic and difficult-to-treat wastewater produced in chemical, printing and dyeing, and pharmaceutical industries ur...

Claims

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Application Information

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IPC IPC(8): B01J31/34B01J31/22C02F3/30C02F101/30
CPCB01J31/34B01J31/1691B01J31/223C02F3/30B01J2531/54C02F2305/10C02F2101/308C02F2101/30B01J35/39Y02W10/37
Inventor 顾文秀李倩李海新宋启军赵媛王婵
Owner JIANGNAN UNIV
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