Bismuth molybdate graphene aerogel compound and preparation method thereof

A technology of graphene airgel and graphene hydrogel, which is applied in chemical instruments and methods, catalyst activation/preparation, water pollutants, etc., can solve the problems of low visible light absorption, hindering practical application, and low specific surface area. Achieve the effects of improving chemical action, prolonging life, and improving adsorption capacity

Inactive Publication Date: 2018-10-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Bi 2 MoO 6 It has certain application prospects in the field of photocatalysis, but its low specific surface area, low visible light absorption, and rapid recombination of photogenerated charge carriers hinder its practical application.

Method used

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  • Bismuth molybdate graphene aerogel compound and preparation method thereof
  • Bismuth molybdate graphene aerogel compound and preparation method thereof
  • Bismuth molybdate graphene aerogel compound and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: Preparation of reduced graphene oxide airgel (GA) and photodegradation of pollutants

[0024](1) Synthesis of reduced graphene oxide airgel (GA): 10 mL of GO (2 mg / mL) suspension was sonicated for 1 hour at room temperature to form a homogeneous solution. Then 0.04 g of L-lysine was added to the prepared GO solution under vigorous stirring and stirred for 1 h. Afterwards, the solution was transferred to a 50-mL polytetrafluoroethylene-lined autoclaved hydrothermal reactor and heated at 160 °C for 10 h. After cooling to room temperature, a 3D reduced graphene oxide hydrogel was obtained, which was immersed in deionized water and absolute ethanol several times, and the resulting composite was further freeze-dried at −50 °C for 24 h. Finally, a 3D independent mesoporous product of reduced graphene oxide airgel (GA) was obtained;

[0025] (2) Photodegradation of organic pollutants by reduced graphene oxide airgel (GA): Add reduced graphene oxide airgel (GA) to ...

Embodiment 2

[0026] Embodiment 2: Pure Bi 2 MoO 6 Preparation and Photodegradation of Pollutants

[0027] (1) Pure Bi 2 MoO 6 Synthesis of : at room temperature, 0.15g of Bi(NO 3 ) 3 .5H 2 O and 0.025g (NH 4 ) 6 Mo 7 o 24 .4H 2 O was dissolved in 10 mL of deionized water, sonicated at room temperature for 1 h (referred to as solution A), and then 0.04 g of L-lysine was added dropwise to solution A under vigorous stirring and stirred for 1 hour. Afterwards, the solution was transferred to a 50-mL polytetrafluoroethylene-lined autoclaved hydrothermal reactor and heated at 160 °C for 10 h. After cooling to room temperature, it was immersed in deionized water and absolute ethanol several times, and the resulting product was further freeze-dried at −50 °C for 24 h. Finally, to obtain pure Bi 2 MoO 6 ;

[0028] Pure Bi 2 MoO 6 Photodegradation of organic pollutants: pure Bi 2 MoO 6 Add it to 60mL of methylene blue aqueous solution with a concentration of 10mg / L, stir in the da...

Embodiment 3

[0029] Example 3: 3D Bi 2 MoO 6 / Reduced graphene oxide airgel composite synthesis and photodegradation of organic pollutants

[0030] (1) Bi 2 MoO 6 / Synthesis of reduced graphene oxide airgel composite: 10 mL of GO (2.0 mg / mL) suspension was sonicated for 1 hour at room temperature to form a homogeneous solution. At the same time, 0.15g of Bi(NO 3 ) 3 .5H 2 O and 0.025g (NH 4 ) 6 Mo 7 o 24 .4H 2 O was dissolved in 10 mL deionized water, sonicated for 1 h at room temperature (referred to as solution A), and then the prepared GO solution and 0.04 g L-lysine were added dropwise to solution A under vigorous stirring and stirred for 1 h. Afterwards, the solution was transferred to a 50-mL polytetrafluoroethylene-lined autoclaved hydrothermal reactor and heated at 160 °C for 10 h. After cooling to room temperature, three-dimensional (3D) Bi 2 MoO 6 / reduce the graphene oxide hydrogel composite, and after immersing it in deionized water and absolute ethanol several ti...

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Abstract

The invention discloses bismuth molybdate graphene aerogel compound and a preparation method thereof and belongs to the technical field of photocatalyst preparation. According to the bismuth molybdategraphene aerogel compound disclosed by the invention, graphene oxide is utilized as a raw material, hexaammonium molybdate tetrahydrate and anhydrous bismuth nitrate are utilized as raw materials forpreparing Bi2MoO6, and 3D Bi2MoO6 / reduced graphene oxide aerogel compound can be finally obtained through solvent heat and freeze drying treatment. The life of an electron-hole pair of the synthesized 3D Bi2MoO6 / reduced graphene oxide aerogel compound is longer, adsorption capacity of the synthesized 3D Bi2MoO6 / reduced graphene oxide aerogel compound to organic pollutants and absorption capacityof the synthesized 3D Bi2MoO6 / reduced graphene oxide aerogel compound to visible light are also enhanced, and catalytic degradation activity to the organic pollutants under the visible light is higher. A photodegradation rate of the 3D Bi2MoO6 / reduced graphene oxide aerogel compound is 2.1 times of that of Bi2MoO6 and is 2.46 times of that of reduced graphene oxide aerogel, and the 3D Bi2MoO6 / reduced graphene oxide aerogel compound has higher actual application value.

Description

technical field [0001] The invention relates to a bismuth molybdate graphene airgel composite and a preparation method thereof, belonging to the technical field of photocatalyst preparation. Background technique [0002] At present, with the rapid development of industry, the problem of environmental pollution, especially the problem of organic pollutants is becoming more and more serious. Generally speaking, adsorption is one of the important methods to solve organic pollutants. Among many adsorption materials, the three-dimensional porous structure of reduced graphene oxide airgel (GA) has the advantages of low cost, convenient operation, large surface area, and large open pores, so it has a high adsorption rate for organic pollutants (Acs Applied Materials & Interfaces, 2012, 4(8), pp 4373–4379). Although reduced graphene oxide airgel is considered to be an effective adsorption material for organic pollutants, toxic organic pollutants are only aggregated together instea...

Claims

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Application Information

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IPC IPC(8): B01J23/31B01J37/10B01J37/34B01J37/16B01J37/02C02F1/30C02F101/30
CPCC02F1/30B01J23/31B01J37/0201B01J37/10B01J37/16B01J37/343C02F2305/10C02F2101/30B01J35/39B01J35/23
Inventor 刘湘王珏张倩文夏咏梅王海军
Owner JIANGNAN UNIV
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