Z-Scheme composite system as well as preparation method and application of Z-Scheme composite system

A system, g-c3n4 technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of facilitating mass production, excellent photocatalytic activity, reducing energy consumption and reaction costs

Active Publication Date: 2017-12-05
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no one-step hydrothermal synthesis of single-crystal nanodots forming mesoporous Co 3 o 4 Nanosphere-modified mesoporous mesoporous g-C 3 N 4 The "Z-Scheme" Co 3 o 4 / g -C 3 N 4 Composite system

Method used

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  • Z-Scheme composite system as well as preparation method and application of Z-Scheme composite system
  • Z-Scheme composite system as well as preparation method and application of Z-Scheme composite system
  • Z-Scheme composite system as well as preparation method and application of Z-Scheme composite system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: "Z-Scheme" 0.3wt% Co 3 o 4 / g -C 3 N 4 Preparation of composite system

[0033] 1. Preparation of g-C 3 N 4 catalyst of light

[0034] 1. Put melamine into an open crucible, heat it from room temperature to 550°C at a heating rate of 2°C / min, and keep it for 4 hours.

[0035] 2. After cooling to room temperature, take out the yellow solid and grind it to powder with an agate mortar to obtain g-C 3 N 4 Photocatalysts are collected and put into sealed bags.

[0036] 2. Preparation of "Z-Scheme" 0.3wt% Co 3 o 4 / g -C 3 N 4 Composite system

[0037] 1. Accurately weigh 0.0054 grams of cobalt nitrate hexahydrate and 2 grams of cetyltrimethylammonium bromide, and then dissolve them in a mixture of 6 milliliters of deionized water and 30 milliliters of methanol to obtain solution A.

[0038] 2. Add 0.5 g g-C to solution A 3 N 4 Suspension B was formed.

[0039] 3. Suspension B was ultrasonically dispersed for 30 minutes, then magnetically stirred fo...

Embodiment 2

[0042] Example 2: "Z-Scheme" 0.5wt% Co 3 o 4 / g -C 3 N 4 Preparation of composite system

[0043] 1. Preparation of g-C 3 N 4 catalyst of light

[0044] 1. Put melamine into an open crucible, heat it from room temperature to 550°C at a heating rate of 2°C / min, and keep it for 4 hours.

[0045] 2. After cooling to room temperature, take out the yellow solid and grind it to powder with an agate mortar to obtain g-C 3 N 4 Photocatalysts are collected and put into sealed bags.

[0046] 2. Preparation of "Z-Scheme" 0.5wt% Co 3 o 4 / g -C 3 N 4 Composite system

[0047] 1. Accurately weigh 0.0091 grams of cobalt nitrate hexahydrate and 2 grams of cetyltrimethylammonium bromide, and then dissolve them in a mixture of 6 milliliters of deionized water and 30 milliliters of methanol to obtain solution A.

[0048] 2. Add 0.5 g g-C to solution A 3 N 4 Suspension B was formed.

[0049] 3. Suspension B was ultrasonically dispersed for 30 minutes, then magnetically stirred fo...

Embodiment 3

[0052] Example 3: "Z-Scheme" 1 wt% Co 3 o 4 / g -C 3 N 4 Composite system preparation

[0053] 1. Preparation of g-C 3 N 4 catalyst of light

[0054] 1. Put melamine into an open crucible, heat it from room temperature to 550°C at a heating rate of 2°C / min, and keep it for 4 hours.

[0055] 2. After cooling to room temperature, take out the yellow solid and grind it to powder with an agate mortar to obtain g-C 3 N 4 Photocatalysts are collected and put into sealed bags.

[0056] 2. Preparation of "Z-Scheme" 1wt% Co 3 o 4 / g -C 3 N 4 Composite system

[0057] 1. Accurately weigh 0.0181 grams of cobalt nitrate hexahydrate and 2 grams of cetyltrimethylammonium bromide, and then dissolve them in a mixture of 6 milliliters of deionized water and 30 milliliters of methanol to obtain solution A.

[0058] 2. Add 0.5 g g-C to solution A 3 N 4 Suspension B was formed.

[0059] 3. Suspension B was ultrasonically dispersed for 30 minutes, then magnetically stirred for 24 h...

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Abstract

The invention belongs to the technical field of nanometer material synthesis and relates to a "Z-Scheme" Co3O4/g-C3N4 composite system which is synthesized by one step by using a simple and rapid hydrothermal method and can be used for degrading tetracycline hydrochloride under visible light, wherein the surface of g-C3N4 is modified by a mesoporous Co3O4 nanosphere composed of monocrystal nanodots in the system. A sample is prepared by the steps: firstly, preparing g-C3N4 for later use; and then, controllably preparing the "Z-Scheme" Co3O4/g-C3N4 composite system, accurately weighing a certain quantity of cobaltous nitrate hexahydrate and cetyltrimethyl ammonium bromide, dissolving cobaltous nitrate hexahydrate and cetyltrimethyl ammonium bromide into a mixed solution of deionized water and methanol, then, adding g-C3N4, carrying out magnetic stirring for 24h after carrying out ultrasonic dispersion for 30min, then, transferring a suspension liquid into a 50ml high-pressure reactor, carrying out reaction in a baking oven at 180 DEG C for 24h to obtain a dark yellow sediment, and then, carrying out centrifuging, cleaning and drying.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and uses a simple and fast hydrothermal method to synthesize single crystal nanodots in one step to form mesoporous Co 3 o 4 Nanosphere modified g-C 3 N 4 The "Z-Scheme" Co 3 o 4 / g -C 3 N 4 The composite system can be used to degrade tetracycline hydrochloride pollutants under visible light. Background technique [0002] In recent decades, with the rapid development of modern industry, the world is facing increasingly severe energy crisis and environmental pollution. The photocatalytic technology has the characteristics of energy saving, high efficiency, and environmental protection, and is an ideal new method for using clean solar energy to control environmental pollution. However, designing and preparing photocatalytic materials with high-efficiency photocatalytic performance is still a huge challenge for researchers. [0003] Graphite phase carbon nitride (g-C for shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/004
Inventor 吴海君李春梅董红军艾俊哲刘春波车慧楠胡颢胡伟
Owner YANGTZE UNIVERSITY
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