Visible light responsive photocatalyst and preparation method thereof

A photocatalyst and visible light technology, which is applied in the field of photocatalysis, can solve the problems of high cost, poor stability of photosensitizer, and low photocatalytic efficiency, and achieve the effects of low cost, simple and easy preparation method, and good photocatalytic effect

Inactive Publication Date: 2018-12-04
WUXI JIANGNAN CABLE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have problems such as high cost, poor stability of photosensitizer, and low photocatalytic efficiency.

Method used

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  • Visible light responsive photocatalyst and preparation method thereof
  • Visible light responsive photocatalyst and preparation method thereof
  • Visible light responsive photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A visible light-responsive photocatalyst consisting of two-dimensional thin-layer V with a mass ratio of 1.71:100 2 o 5 and two-dimensional thin-layer g-C 3 N 4 Composite, the specific preparation method includes the following steps:

[0019] (1) First, the bulk V 2 o 5 Put it into a muffle furnace for calcination to 600°C, then quickly transfer it to liquid nitrogen, and rapidly cool it to obtain V 2 o 5 nanosheet, the V 2 o 5 Nanosheets were added to isopropanol, ultrasonicated for 30 min, stirred for 50 min to make it evenly mixed, and a suspension with a concentration of 0.01 mg / L was prepared;

[0020] (2) Add 1 mL of the suspension obtained in step (1) to melamine, stir for 40 min, and make it mix evenly;

[0021] (3) Move the evenly stirred mixture to a crucible, put it into a muffle furnace for secondary calcination, the heating rate of the first calcination is 2°C / min, keep it at 550°C for 240 min, and the heating rate of the second calcination is 10°C...

Embodiment 2

[0024] A visible-light-responsive photocatalyst consisting of two-dimensional thin-layer V with a mass ratio of 11.1:100 2 o 5 and two-dimensional thin-layer g-C 3 N 4 Composite, the specific preparation method includes the following steps:

[0025] (1) First, the bulk V 2 o 5 Put it into a muffle furnace for calcination to 800°C, then quickly transfer it to liquid nitrogen, and rapidly cool it to obtain V2 o 5 For nanosheets, add vanadium pentoxide nanosheets to isopropanol, sonicate for 30 minutes, and stir for 50 minutes to make it evenly mixed, and prepare a suspension with a concentration of 0.04 mg / L;

[0026] (2) Add 5 mL of the suspension obtained above into melamine, stir for 40 min, and make it evenly mixed;

[0027] (3) Move the evenly stirred mixture to a crucible, put it into a muffle furnace for secondary calcination, the heating rate of the primary calcination is 2 °C / min, keep it at 550 °C for 240 min, and the heating rate of the second calcination is 10 ...

Embodiment 3

[0030] A visible-light-responsive photocatalyst consisting of two-dimensional thin-layer V with a mass ratio of 35.4:100 2 o 5 and two-dimensional thin-layer g-C 3 N 4 Composite, the specific preparation method includes the following steps:

[0031] (1) First, the bulk V 2 o 5 Calcined to 600-900 ° C, then quickly transferred to liquid nitrogen, rapid cooling to obtain V 2 o 5 For nanosheets, add vanadium pentoxide nanosheets to isopropanol, sonicate for 30 minutes, and stir for 50 minutes to make it evenly mixed, and prepare a suspension with a concentration of 0.01 mg / L;

[0032] (2) Add 5 mL of the suspension obtained above into melamine, stir for 40 min, and make it mix evenly;

[0033] (3) Move the evenly stirred mixture to a crucible, put it into a muffle furnace for secondary calcination, the heating rate of the first calcination is 2°C / min, keep it at 550°C for 240 min, and the heating rate of the second calcination is 10°C / min min, kept at 530°C for 90 min, th...

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Abstract

The invention discloses a visible light responsive photocatalyst, which belongs to the field of photocatalysis. The prepared photocatalyst has a good photocatalytic effect, and has low cost and mild synthesis conditions. The photocatalyst of the invention is composed of a vanadium pentoxide nanosheet and a two-dimensional carbon nitride compound with a mass ratio of 1:100-40:100. A preparation method comprises the following steps: placing the vanadium pentoxide nanosheet in isopropanol, and performing ultrasonic stirring to uniform dispersing; dropping an obtained suspension into melamine, andperforming stirring and uniform mixing; and finally, performing secondary calcination on an uniformly stirred mixture to obtain a light yellow solid which is the vanadium pentoxide/carbon nitride composite photocatalytic material. The photocatalyst prepared by the method of the invention has good photocatalytic performance and photocurrent response, and has a wide visible light response range.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a photocatalyst responsive to visible light and a preparation method thereof. Background technique [0002] With the rapid development of human society, environmental pollution and energy crisis have gradually become the focus of attention. The photocatalytic technology happens to be able to take into account these two problems at the same time. While effectively using solar energy to solve the problem of environmental pollution, it greatly saves the consumption of non-renewable energy, and has no secondary pollution, which is green and environmentally friendly. However, due to the shortcomings of many photocatalysts such as large band gap and low utilization rate of visible light, the further development of photocatalytic technology is greatly restricted. Therefore, the development of new visible light catalysts has become the mainstream direction of modern photocatalytic technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J35/0013B01J35/004B01J37/082C02F1/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 吉海燕费婷许晖宋艳华朱文帅胡杰李华明陈晓军夏亚芳
Owner WUXI JIANGNAN CABLE
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