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Fe monatomic catalyst Fe-PANI and preparation method thereof

A catalyst and atom technology, which is applied in the field of Fe single-atom catalyst Fe-PANI and its preparation, can solve the problems of the narrow pH range of homogeneous Fenton and the inability to recycle Fe of the catalyst, and achieve high heterogeneous Fenton catalytic activity. and stability, less environmental hazard, and the effect of improving transmission efficiency

Pending Publication Date: 2022-05-31
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a Fe single-atom catalyst Fe-PANI and a preparation method thereof, to solve the problem that the homogeneous Fenton pH range is narrow and the catalyst Fe 2+ The problem of not being able to recycle

Method used

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  • Fe monatomic catalyst Fe-PANI and preparation method thereof
  • Fe monatomic catalyst Fe-PANI and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Add 0.2g of acid-doped polyaniline and 20mL of 0.2mol·L -1 NaOH solution, ultrasonically oscillating for 0.5h to de-dope the polyaniline, separate the polyaniline and wash it with deionized water until the washing solution is neutral, then transfer the polyaniline carrier to 20mL 0.12mol·L -1 The ferrous sulfate solution was stirred magnetically at room temperature for 2 hours, and then the polyaniline carrier was separated and washed fully with deionized water, drained and dried in an oven at 60°C to obtain the Fe-PANI catalyst.

[0027] figure 1 and figure 2 These are the high-resolution transmission electron microscope image and the spherical aberration-corrected transmission electron microscope image of the Fe single-atom catalyst Fe-PANI prepared in this example, respectively. Depend on figure 1 It can be seen that the Fe atoms are evenly distributed on the surface of the polyaniline carrier, and there is no agglomeration phenomenon. and figure 2 The spheric...

Embodiment 2

[0030] Add 0.2g of acid-doped polyaniline and 20mL of 0.02mol·L -1 NaOH solution, after ultrasonic oscillation for 0.5h, the polyaniline was separated and washed with deionized water until the washing liquid was neutral, and then the polyaniline carrier was transferred to 20mL0.12mol·L -1 The ferrous sulfate solution was stirred magnetically at room temperature for 2 hours, and then the polyaniline carrier was separated and washed fully with deionized water, drained and dried in an oven at 60°C to obtain the Fe-PANI catalyst.

Embodiment 3

[0032] Add 0.2g of acid-doped polyaniline and 20mL of 0.2mol·L -1 NaOH solution, after ultrasonic oscillation for 0.5h, the polyaniline was separated and washed with deionized water until the washing liquid was neutral, and then the polyaniline carrier was transferred to 20mL 1.0mol·L -1 The ferrous sulfate solution was stirred magnetically at room temperature for 2 hours, and then the polyaniline carrier was separated and washed fully with deionized water, drained and dried in an oven at 60°C to obtain the Fe-PANI catalyst.

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Abstract

The invention discloses a preparation method of a Fe monatomic catalyst Fe-PANI. The preparation method comprises the following steps: 1) pretreating a polyaniline carrier; polyaniline in a complete oxidation state or an intermediate oxidation state is directly used as a carrier; the polyaniline in the acid-doped state is used as a carrier after being subjected to alkali washing; (2) dipping the polyaniline carrier in a ferric salt solution or a ferrous salt solution or a mixed solution of ferric salt and ferrous salt, so that Fe atoms are coordinated with imine nitrogen atoms in polyaniline to be loaded on the surface of polyaniline; and 3) separating out the polyaniline carrier loaded with Fe atoms, washing the polyaniline carrier with deionized water, and drying to obtain the Fe monatomic catalyst Fe-PANI. The invention further relates to the Fe monatomic catalyst Fe-PANI prepared through the method, polyaniline serves as a carrier of the Fe monatomic catalyst Fe-PANI, and Fe monatomic atoms are stably loaded on the surface of the polyaniline carrier in a highly dispersed mode through coordination.

Description

technical field [0001] The invention relates to a catalyst and water treatment technology, in particular to an Fe single-atom catalyst Fe-PANI and a preparation method thereof. Background technique [0002] Homogeneous Fenton oxidation technology is often used in the treatment of organic wastewater that is refractory to biodegradation or difficult to treat with general chemical oxidation technology. The mechanism is that ferrous ions (Fe 2+ ) catalyzes the decomposition of hydrogen peroxide to produce strong oxidizing hydroxyl radicals (oxidation potential, as high as 2.80V, second only to fluorine). Hydroxyl radicals have high electronegativity or electrophilicity, and their electron affinity is as high as 569.3kJ, so they have strong addition reaction characteristics and can effectively degrade organic pollutants in water bodies. However, the homogeneous Fenton reaction has disadvantages such as narrow pH range (about 3), difficulty in catalyst recovery, and generation of...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J31/18C02F1/72C02F101/30
CPCB01J31/069B01J31/1805C02F1/722C02F1/725B01J2531/842C02F2101/30C02F2101/40C02F2305/10C02F2305/023C02F2209/06B01J35/39Y02P20/584
Inventor 杨鸿辉石博方李航
Owner XI AN JIAOTONG UNIV
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