Preparation method of graphene-like carbon nitride photocatalytic material

A technology of carbon nitride light and graphite carbon nitride, which is applied in the field of preparation of graphene-like carbon nitride photocatalyst, can solve the problem of low light utilization rate, and achieve good photocatalytic degradation of environmental pollutants and photocurrent The effect of responsiveness

Active Publication Date: 2013-09-25
JIANGSU UNIV
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  • Abstract
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Problems solved by technology

[0002] Graphite carbon nitride (g-C 3 N 4 ) has a layered structure like graphite, has conjugated large π bonds, and has good chemical stability. It has been reported that it can photolyze water to produce hydrogen under visible light, and has the ability to photocatalyze the degradation of environmental pollutants, thus Rapidly becoming a research hotspot in the field of photocatalysis; g-C 3 N 4 As a high-temperature-resistant, non-metallic, non-toxic catalyst, it has good application prospects, but the study of its properties found that the monomer g-C 3 N 4 The utilization rate of light is low, and the recombination rate of electron holes is high under light conditions. Researchers use modification methods to improve g-C 3 N 4 Photocatalytic activity, such as transition metal doping, semiconductor recombination, dye sensitization, etc.; Inspired by graphene research, single-layer graphene has excellent photoelectric properties, because graphite-type carbon nitride has a layered structure like graphite , and the layers are connected by van der Waals force, so if it can be prepared like graphene, the g-C 3 N 4 After processing, exfoliating a single-layer or few-layer graphene-like structure carbon nitride two-dimensional material, its properties may show characteristics different from graphite-type carbon nitride

Method used

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  • Preparation method of graphene-like carbon nitride photocatalytic material
  • Preparation method of graphene-like carbon nitride photocatalytic material
  • Preparation method of graphene-like carbon nitride photocatalytic material

Examples

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Effect test

Embodiment 1

[0024] Example 1: Graphene-like C prepared by exfoliation 3 N 4

[0025] Weigh 0.06g g-C 3 N 4 Place in a 50 ml beaker, add 25 ml 99% 1,3-butanediol, then put it into a 100W ultrasonic wave for 30 hours, then centrifuge the suspoemulsion at 13000 rpm for 5 After 10 minutes, the obtained suspoemulsion was transferred to a watch glass, placed in a constant temperature oven, and evaporated to dryness at 160 ° C. The finally obtained light yellow solid powder was graphene-like carbon nitride.

Embodiment 2

[0026] Example 2: Graphene-like C prepared by exfoliation 3 N 4

[0027] Weigh 0.08 g g-C 3 N 4 Place in a 50 ml beaker, add 40ml of 40% 1,3-butanediol, then put it into an 800W ultrasonic wave for 7 hours, then centrifuge the suspoemulsion at 1500 rpm for 20 minutes , transfer the obtained suspoemulsion to a watch glass, put it into a constant temperature oven, and evaporate to dryness at 100°C, and the finally obtained light yellow solid powder is graphene-like carbon nitride.

Embodiment 3

[0028] Embodiment 3: the graphene-like C prepared by exfoliation 3 N 4

[0029] Weigh 0.1g g-C 3 N 4 Place in a 50 ml beaker, add 30 ml of 70% 1,3-butanediol, then put it into a 400 W ultrasonic wave for 15 hours, then centrifuge the suspoemulsion at 9000 rpm After 10 minutes, the obtained suspoemulsion was transferred to a watch glass, placed in a constant temperature oven, and evaporated to dryness at 300°C. The finally obtained light yellow solid powder was graphene-like carbon nitride.

[0030] The structure test of the prepared graphene-like carbon nitride was carried out on a German Bruker D8 type ray diffractometer (XRD) (Cu-Kα ray, λ=1.5418?, the range is 10 ° -80 ° ), and its XRD pattern is shown in figure 1 shown. Depend on figure 1 It can be seen that g-C 3 N 4 in 13.1 ° and 27.4 ° Diffraction peaks appear. and g-C 3 N 4 Compared to graphene-like carbon nitride in 13.1 ° and 27.4 ° The intensity of the diffraction peaks is significantly weakened, in...

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Abstract

The invention relates to a preparation method of a graphene-like carbon nitride photocatalyst, belonging to the technical field of preparation methods of photocatalytic materials. The method comprises the following steps of: (1) dispersing graphite type carbon nitride in 1, 3-butanediol for performing ultrasonic treatment; (2) performing centrifugal treatment on an obtained suspension to remove a precursor; and (3) evaporating the suspension obtained by centrifugation till dryness so as to obtain a solid, namely the graphene-like carbon nitride photocatalyst. Ultra-thin type graphene-like carbon nitride nano-sheets prepared by utilizing the method disclosed by the invention has good photocatalytic property and photocurrent response, and the graphene-like carbon nitride nano-sheets simultaneously show stronger adsorption capacity. The preparation method provided by the invention has the advantages of low price of raw materials, simple process and mild reaction; and furthermore, the solvent raw materials can be industrially recycled, so that the whole synthesis process is green and environment-friendly, the product cost is effectively reduced, the preparation method is suitable for industrial large-batch production, and the preparation method further has very high application prospects and using values.

Description

technical field [0001] The invention relates to a preparation method of a graphene-like carbon nitride photocatalyst, belonging to the technical field of preparation methods of photocatalytic materials. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) has a layered structure like graphite, has conjugated large π bonds, and has good chemical stability. It has been reported that it can photolyze water to produce hydrogen under visible light, and has the ability to photocatalyze the degradation of environmental pollutants, thus Rapidly becoming a research hotspot in the field of photocatalysis; g-C 3 N 4 As a high-temperature-resistant, non-metallic, non-toxic catalyst, it has good application prospects, but the study of its properties found that the monomer g-C 3 N 4 The utilization rate of light is low, and the recombination rate of electron holes is high under light conditions. Researchers use modification methods to improve g-C 3 N 4 Photocatalytic ...

Claims

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Application Information

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IPC IPC(8): B01J31/02
Inventor 许晖佘小杰李华明徐远国颜佳夏杰祥宋艳华
Owner JIANGSU UNIV
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