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rGO/Fe<3+>/g-C3N4 ternary composite photocatalyst and preparation method thereof

A photocatalyst and ternary composite technology, applied in the field of photocatalytic materials, can solve the problems of low utilization rate of sunlight, high recombination rate of photogenerated carriers, and small specific surface area, so as to improve the catalytic activity of visible light and broaden the range of photoresponse Effect

Active Publication Date: 2018-10-19
重庆铭楚新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, g-C 3 N 4 There are still many difficulties in practical application due to the small specific surface area, high recombination rate of photogenerated carriers, and low utilization rate of sunlight.

Method used

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  • rGO/Fe&lt;3+&gt;/g-C3N4 ternary composite photocatalyst and preparation method thereof
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  • rGO/Fe&lt;3+&gt;/g-C3N4 ternary composite photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 prepares rGO / Fe 3+ / g -C 3 N 4 Ternary Composite Photocatalyst

[0032] Preparation of rGO / Fe 3+ / g -C 3 N 4 Ternary composite photocatalyst, according to the following steps:

[0033] (1) Fe-C 3 N 4 Preparation of photocatalyst

[0034] Take a certain amount of iron nitrate nonahydrate and dissolve it in deionized water, add melamine, wherein the quality of the two is based on Fe and g-C 3 N 4 The mass ratio ranges from 0.1 to 3%, weighed, stirred for 0.5h, and dried in an oven at 80°C for 24h. Then use an agate mortar to grind the dried solid into powder and put it into a muffle furnace, control the calcination temperature to 550°C, and the calcination time to 2h, and grind the air-cooled solid to obtain Fe-C 3 N 4 catalyst of light. At the same time, the sample without Fe was used as a control.

[0035] (2) Protonated Fe-C 3 N 4 catalyst of light

[0036] The resulting Fe-C 3 N 4 Add the powder into 0.5mol / L hydrochloric acid solution,...

Embodiment 2

[0039] Implementation of 2 sample testing

[0040] Detect the sample prepared according to the method of Example 1:

[0041] Microscopic characterization: Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS).

[0042] Optical properties: UV diffuse reflectance spectrum (UV-vis), observe the light absorption range and absorption intensity of different photocatalysts; photoluminescence spectrum (PL), the greater the fluorescence intensity, the higher the electron-hole recombination rate.

[0043] Evaluation of photocatalytic activity: Under the conditions of temperature 25°C, relative humidity 50%, and initial NO concentration of 1000ppb, a 250W metal halide lamp was selected as the light source for the photocatalytic degradation of NO reaction, and the photocatalytic degradation efficiency of different photocatalysts was tested to evaluate the photocatalytic activity. size of catalytic activity.

[0044] 1. Eff...

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Abstract

The invention discloses a rGO / Fe<3+> / g-C3N4 ternary composite photocatalyst. The rGO / Fe<3+> / g-C3N4 ternary composite photocatalyst is obtained by mixing an aqueous iron ion solution and tripolycyanamide, drying, grinding and calcinating to obtain an Fe-C3N4 photocatalyst, protonating the Fe-C3N4 photocatalyst, then mixing with graphene oxide, drying and calcinating. The invention further disclosesa preparation method of the rGO / Fe<3+> / g-C3N4 ternary composite photocatalyst. The preparation method comprises the following steps: (1), preparing the Fe-C3N4 photocatalyst: weighing a certain amount of iron salt, dissolving in deionized water, adding the tripolycyanamide, uniformly mixing, drying, calcinating, and cooling to obtain the Fe-C3N4 photocatalyst; (2), protonating the Fe-C3N4 photocatalyst; (3), dissolving graphene oxide powder in deionized water, ultrasonically dispersing, adding the protonated Fe-C3N4 powder, uniformly mixing, stirring, drying, grinding, and calcinating to obtain the rGO / Fe<3+> / g-C3N4 ternary composite photocatalyst.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a rGO / Fe 3+ / g -C 3 N 4 Ternary composite photocatalyst and preparation method thereof. Background technique [0002] In recent years, semiconductor-based photocatalytic technology has attracted much attention because of its excellent potential in solar energy conversion, degradation of organic pollutants, and photolysis of water to produce hydrogen and oxygen. It has become an emerging environmental protection technology in the 21st century. Graphite carbon nitride g-C 3 N 4 It is a C-rich photocatalyst with visible light responsiveness, which has significant advantages in terms of preparation process, cost, and structural properties, and has gradually become a research hotspot in the field of photocatalysis. However, g-C 3 N 4 There are still many difficulties in practical applications due to the small specific surface area, high recombination rate of ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 曹雪娟唐伯明杨晓宇何丽红郭鹏单柏林
Owner 重庆铭楚新材料有限公司
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