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Composite photocatalytic material as well as preparation method and application thereof

A technology of composite photocatalysis and cobalt nitrate hexahydrate, which is applied in the field of photocatalytic materials, can solve the problems of light absorption limitation and wide utilization, and achieve the effects of inhibiting recombination, easy capture of electrons, and easy recombination

Active Publication Date: 2020-12-04
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the existence of the inherent internal electrostatic field of BiOCl can also effectively promote the separation of photogenerated electrons and holes, but the limited absorption of light limits its wider application.

Method used

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  • Composite photocatalytic material as well as preparation method and application thereof
  • Composite photocatalytic material as well as preparation method and application thereof
  • Composite photocatalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A Co-g-C 3 N 4 The preparation method of / BiOCl composite photocatalytic material, this method comprises the following steps:

[0034] 1) 20mg Co(NO 3 ) 2 ·6H 2 O, 4 g of melamine and 20 mL of deionized water were uniformly mixed under ultrasound for 60 minutes;

[0035] 2) Place the ultrasonic solution in a constant temperature drying oven at 80°C to dry overnight to remove moisture;

[0036] 3) Grind the obtained solid and calcinate it in a muffle furnace at 550°C for 4 hours to obtain a solid powder Co-g-C 3 N 4 , calcined melamine under the same conditions to obtain light yellow powder g-C 3 N 4 ;

[0037] 4) Separately mix 5mmol Bi(NO 3 ) 3 ·5H 2 O and 5mmol KCl were sonicated for 30 minutes to fully dissolve in 40ml ethylene glycol solution and 40mL deionized water, then the above two solutions were mixed and 0.1g Co-g-C was added 3 N 4 , continue to sonicate for 60 minutes to obtain a uniformly dispersed mixed solution;

[0038] 5) Transfer the mixe...

Embodiment 2

[0041] A Co-g-C 3 N 4 The preparation method of / BiOCl composite photocatalytic material, this method comprises the following steps:

[0042] 1) 40mg Co(NO 3 ) 2 ·6H 2 O, the melamine of 4g and 20mL deionized water are mixed evenly under ultrasonic, and continue 60 minutes;

[0043] 2) Place the ultrasonic solution in a constant temperature drying oven at 80°C to dry overnight to remove moisture;

[0044] 3) Grind the obtained solid and calcinate it in a muffle furnace at 550°C for 4 hours to obtain a solid powder Co-g-C 3 N 4 , calcined melamine under the same conditions to obtain light yellow powder g-C 3 N 4 ;

[0045] 4) Separately mix 5mmol Bi(NO 3 ) 3 ·5H 2 O and 5mmol potassium chloride were ultrasonically dissolved in 40ml ethylene glycol solution and 40mL deionized water for 30 minutes, then the above two solutions were mixed and 0.1g Co-g-C was added 3 N 4 , continue to sonicate for 60 minutes to obtain a uniformly dispersed mixed solution;

[0046] 5) ...

Embodiment 3

[0049] A Co-g-C 3 N 4 The preparation method of / BiOCl composite photocatalytic material, this method comprises the following steps:

[0050] 1) 100mg Co(NO 3 ) 2 ·6H 2 O, the melamine of 4g and 20mL deionized water are mixed evenly under ultrasonic, and continue 60 minutes;

[0051] 2) Place the ultrasonic solution in a constant temperature drying oven at 80°C to dry overnight to remove moisture;

[0052] 3) Grind the obtained solid and calcinate it in a muffle furnace at 550°C for 4 hours to obtain a solid powder Co-g-C 3 N 4 , calcined melamine under the same conditions to obtain light yellow powder g-C 3 N 4 ;

[0053] 4) Separately mix 5mmol Bi(NO 3 ) 3 ·5H 2 O and 5mmol KCl were sonicated for 30 minutes to fully dissolve in 40ml ethylene glycol solution and 40mL deionized water, then the above two solutions were mixed and 0.1g Co-g-C was added 3 N 4 , continue to sonicate for 60 minutes to obtain a uniformly dispersed mixed solution;

[0054] 5) Transfer th...

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Abstract

The invention relates to a composite photocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) uniformly mixing cobaltnitrate hexahydrate, melamine and deionized water under ultrasound waves; (2) drying the solution having been subjected to ultrasonic treatment; (3) grinding and calcining a dried solid to obtain solid powder Co-g-C3N4; (4) uniformly mixing a solution A and a solution B, adding Co-g-C3N4, and continuing ultrasonic treatment to obtain a uniformly-dispersed mixed solution; (5) carrying out a hydrothermal reaction on the mixed solution; and (6) centrifuging, washing, drying, cooling and grinding a reacted substance successively to obtain the Co-g-C3N4 / BiOCl composite photocatalytic material. Compared with the prior art, the composite photocatalytic material has the advantages of simple preparation method, convenience in operation, capability of effectively degrading rhodamine B under visiblelight and the like.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a Co-g-C 3 N 4 / BiOCl composite photocatalytic material and its preparation method and application. Background technique [0002] Organic dyes are excellent light-harvesting materials, but they are also regarded as environmental pollutants when they are discharged into natural water resource systems. These compounds are difficult to degrade in water by themselves, causing serious environmental pollution. Efficient methods to deal with organic dyes are imminent. Semiconductor-based photocatalysis has emerged as one of the most effective approaches to degrade these organic dye pollutants. Recently, bismuth-based photocatalytic materials have also attracted great attention for pollution treatment due to their excellent activity. To date, a large number of bismuth-based materials have been developed to remove organic dyes in natural water resource systems. [0003] As a w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/10B01J37/08B01J37/34C02F1/30C02F101/34C02F101/38C02F101/30
CPCB01J27/24B01J37/0036B01J37/10B01J37/082B01J37/343C02F1/30C02F2101/34C02F2101/38C02F2305/10C02F2101/308C02F2101/30B01J35/39Y02W10/37
Inventor 梅杰高程徐虎方振王宇红
Owner SHANGHAI INST OF TECH