Preparation method and applications of nitrogen doped reduced graphene oxide supported CdTe/CdS heterojunction composite photocatalyst

A technology of nitrogen doping and graphene, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex operation, high energy consumption, harsh synthesis conditions, etc., and achieve high-efficiency processing technology , environmental protection treatment technology, the effect of easy operation

Inactive Publication Date: 2018-10-23
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have disadvantages such as high energy consumption, complicated operation, and relatively harsh synthesis conditions, and are not practical and cannot be applied on a large scale.

Method used

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  • Preparation method and applications of nitrogen doped reduced graphene oxide supported CdTe/CdS heterojunction composite photocatalyst
  • Preparation method and applications of nitrogen doped reduced graphene oxide supported CdTe/CdS heterojunction composite photocatalyst
  • Preparation method and applications of nitrogen doped reduced graphene oxide supported CdTe/CdS heterojunction composite photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Nitrogen-doped reduced graphene oxide (N-rGO):

[0055] Graphene oxide (GO) powder was synthesized by the modified Hummer method, 0.3g GO powder was added into 150mL deionized water, and ultrasonically dispersed. Add 2mL ammonia water and sonicate. Then 1 mL of hydrazine hydrate was added, magnetically stirred at 100 °C for 24 h after ultrasonication, centrifuged, washed with deionized water several times, and dried in an oven at 60 °C to obtain N-rGO.

[0056] (2) Preparation of CdTe nanoparticles:

[0057] Weigh 6mmol cadmium chloride (CdCl 2 2.5H 2 0), join in the reactor core of 50mL, add 20mL deionized water, sonicate until completely dissolved, then add 10mL ammonia water, 0.4g tartaric acid, 4mmol sodium tellurite, 4mL hydrazine hydrate, ultrasonic treatment for half an hour, pack The kettle was placed in an oven at 180°C for 5 hours, cooled to room temperature, centrifuged, washed several times with deionized water and absolute ethanol, and dried in an o...

Embodiment 2

[0062] (1) Nitrogen-doped reduced graphene oxide (N-rGO):

[0063] Graphene oxide (GO) powder was synthesized by the modified Hummer method, 0.3g GO powder was added into 150mL deionized water, and ultrasonically dispersed. Add 2mL ammonia water and sonicate. Then 1 mL of hydrazine hydrate was added, magnetically stirred at 100 °C for 24 h after ultrasonication, centrifuged, washed with deionized water several times, and dried in an oven at 60 °C to obtain N-rGO.

[0064] (2) Preparation of CdTe nanoparticles:

[0065] Weigh 6mmol cadmium chloride (CdCl 2 2.5H 2 0), join in the reactor core of 50mL, add 20mL deionized water, sonicate until completely dissolved, then add 10mL ammonia water, 0.4g tartaric acid, 4mmol sodium tellurite, 4mL hydrazine hydrate, ultrasonic treatment for half an hour, pack The kettle was placed in an oven at 180°C for 5 hours, cooled to room temperature, centrifuged, washed several times with deionized water and absolute ethanol, and dried in an o...

Embodiment 3

[0070] (1) Nitrogen-doped reduced graphene oxide (N-rGO):

[0071] Graphene oxide (GO) powder was synthesized by the modified Hummer method, 0.3g GO powder was added into 150mL deionized water, and ultrasonically dispersed. Add 2mL ammonia water and sonicate. Then 1 mL of hydrazine hydrate was added, magnetically stirred at 100 °C for 24 h after ultrasonication, centrifuged, washed with deionized water several times, and dried in an oven at 60 °C to obtain N-rGO.

[0072] (2) Preparation of CdTe nanoparticle photocatalyst:

[0073] Weigh 6mmol cadmium chloride (CdCl 2 2.5H 2 0), join in the reactor core of 50mL, add 20mL deionized water, sonicate until completely dissolved, then add 10mL ammonia water, 0.4g tartaric acid, 4mmol sodium tellurite, 4mL hydrazine hydrate, ultrasonic treatment for half an hour, pack The kettle was placed in an oven at 180°C for 5 hours, cooled to room temperature, centrifuged, washed several times with deionized water and absolute ethanol, and ...

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Abstract

The invention belongs to the technical field of environmental material preparation, and relates to a preparation method and applications of a nitrogen doped reduced graphene oxide supported CdTe/CdS heterojunction composite photocatalyst. The preparation method comprises following steps: (1) preparing nitrogen doped reduced graphene oxide (N-Rgo); (2) preparing CdTe nano particles; and (3) preparing a CdTe/CdS/N-rGO composite photocatalyst. CdTe and CdS semiconductors are used to establish heterojunction, and then N-rGO is loaded to prepare the photocatalyst, which can be used to degrade wastewater containing 2,4-dichlorophenol.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and in particular relates to a preparation method and application of a nitrogen-doped reduced graphene oxide-supported CdTe / CdS heterojunction composite photocatalyst. Background technique [0002] Phenols and their compounds are widely used in petrochemical, coal chemical, agricultural and other fields, and the environmental problems brought about by the products cannot be ignored. Phenol pollution is the pollution of phenolic compounds to water bodies, and is one of the important industrial wastewater pollution. Wastewater is exemplified by 2,4-dichlorophenol, which is widely used in pesticides, wood preservatives, herbicides and other fields. However, 2,4-dichlorophenol has the characteristics of high stability, strong irritation, and volatility, and will cause a lot of harm to the atmosphere, ecology, and human body. Therefore, to eliminate the pollution of 2,4-di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/36
CPCB01J27/24B01J35/0006B01J35/004C02F1/30C02F2101/36C02F2305/10
Inventor 刘重阳李金择孙林林周亚举刘淳王会琴马长畅霍鹏伟闫永胜
Owner JIANGSU UNIV
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