Unlock instant, AI-driven research and patent intelligence for your innovation.

Cu2O/Au-Fe2O3 photocatalyst and preparation method and application thereof

A technology of au-fe2o3 and photocatalyst, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc. It can solve the problem of small light absorption coefficient and reduced photocatalytic activity, etc. problem, to achieve the effect of improving catalytic performance, promoting hole generation, and reducing recombination

Active Publication Date: 2016-07-27
浙江海宁经编产业园区开发有限公司
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Fe 2 o 3 In the process of photocatalysis, photogenerated electrons and holes recombine rapidly, and the light absorption coefficient is small, resulting in a decrease in photocatalytic activity.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cu2O/Au-Fe2O3 photocatalyst and preparation method and application thereof
  • Cu2O/Au-Fe2O3 photocatalyst and preparation method and application thereof
  • Cu2O/Au-Fe2O3 photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Fe 2 o 3 Preparation of photocatalyst: Fe(NO 3 ) 3 9H 2 O is ground and laid flat in a crucible, heated to 500°C at 2°C / min, and calcined at constant temperature for 3h.

[0051] (2) Au-Fe 2 o 3 The preparation of photocatalyst, the steps are as follows:

[0052] 1gFe 2 o 3 Add it into the reactor, stir evenly, add 0.2mL of chloroauric acid, continue to pass nitrogen, irradiate with visible light for 3h, centrifuge, dry at 100°C, and grind to obtain Au-Fe 2 o 3 .

[0053] (3) Cu 2 O / Fe 2 o 3 The preparation of photocatalyst, the steps are as follows:

[0054] 1gFe 2 o 3 and 50mgCu 2 O was added to water, ultrasonically dispersed for 30 minutes, hydrothermally reacted for 18 hours, kept at a constant temperature of 160°C, centrifuged, dried at 60°C, and ground to obtain Cu 2 O / Fe 2 o 3 .

[0055] (4) Cu 2 O / Au-Fe 2 o 3 The preparation of photocatalyst, the steps are as follows:

[0056] (1) 6gFe(NO 3 ) 3 9H 2 O is ground and laid flat in a...

Embodiment 2

[0060] The photocatalyst Cu prepared by embodiment 1 2 O / Au-Fe 2 o 3 、Cu 2 O / Fe 2 o 3 , Fe 2 o 3 、Au-Fe 2 o 3 Perform UV-visible diffuse reflectance scanning and infrared spectral scanning to obtain UV-vis-DRS comparison figure 1 and infrared spectroscopy figure 2 .

[0061] like figure 1 , Fe 2 o 3 It has strong absorption in the visible light range, and when the wavelength reaches 700nm, it still has strong absorption. After loading Au in the full wavelength range, Au-Fe 2 o 3 The absorption of light is enhanced. Cu 2 O / Fe 2 o 3 In the full wavelength range, the absorption of light, the absorption of light is also enhanced. Cu 2 O / Au-Fe 2 o 3 relative to Fe 2 o 3 , the absorption of light with a wavelength less than 600nm increases significantly, and the absorption of light with a wavelength greater than 700nm increases significantly. This shows that Cu 2 O / Au-Fe 2 o 3 Good response to light, especially visible light.

[0062] like figure 2...

Embodiment 3

[0064] Add phenol-containing wastewater with a volume of 50 mL and a concentration of 10 mg / L into the reactor, and add 50 mg of Cu 2 O / Au-Fe 2 o 3 Visible light catalyst, no need to adjust the pH, keep stirring, stir in the dark for 30 minutes to adsorption equilibrium, turn on the visible light source, and react for 5 hours.

[0065] Change photocatalyst to be the photocatalyst Fe that embodiment 1 prepares 2 o 3 、Au-Fe 2 o 3 、Cu 2 O / Fe 2 o 3 Carry out the comparison of degrading phenol effect, the result is as follows image 3 and Table 1.

[0066] like image 3 , under the same conditions, modified prepared Cu 2 O / Au-Fe 2 o 3 、Cu 2 O / Fe 2 o 3 、Au-Fe 2 o 3 relative to Fe 2 o 3 , the degradation effect of phenol was improved to varying degrees. After 5 hours, Fe 2 o 3 The oxidation rate of phenol reaches 32.85%. Cu 2 O / Au-Fe 2 o 3 The oxidation rate of phenol reaches 87.07%, which is about Fe 2 o 3 2.65 times. As in Table 1, the degradation rate...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a Cu2O / Au-Fe2O3 photocatalyst and a preparation method and application thereof.The loading capacity of Au in the Cu2O / Au-Fe2O3 photocatalyst ranges from 0.5 wt% to 5 wt%, and the loading capacity of Cu2O ranges from 2.5 wt% to 20 wt%.The preparation method comprises the following steps that 1, Fe2O3 powder and a chloroauric acid solution are mixed to be uniform, visible light irradiation is carried out in an oxygen-free environment, after the reaction is finished, centrifugation, drying and grinding are carried out, and Au / Fe2O3 is obtained; 2, Au / Fe2O3 and Cu2O are dispersed in water in proportion, then a hydrothermal reaction is carried out, after the reaction is finished, centrifugation, drying and grinding are carried out, and the Cu2O / Au-Fe2O3 photocatalyst is obtained.The preparation method of the photocatalyst is simple, the photoinduced electron and hole separation effect is good, the visible light response degree is improved, the phenolic wastewater treatment effect is good, and secondary pollution is avoided.

Description

technical field [0001] The present invention relates to the technical field of photocatalytic materials, especially the technical field of visible light catalytic materials, in particular to a Cu 2 O / Au-Fe 2 o 3 Preparation method of photocatalyst and its application. Background technique [0002] Photocatalytic materials have attracted much attention in recent years because they can be used for photocatalytic degradation of organic pollutants, photolysis of water to produce oxygen and hydrogen, etc. Extensively studied TiO 2 , with a wide band gap, it can only absorb ultraviolet light which accounts for less than 5% of solar energy, and the utilization rate of solar energy is very low. Therefore, the development of novel narrow-bandgap photocatalytic materials has attracted extensive attention in the field of photocatalysis. [0003] Fe 2 o 3 As a narrow bandgap semiconductor material, the bandgap energy is 2.1-2.2eV, and the maximum absorption wavelength is 560nm. T...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J23/89C02F1/30C02F1/72C02F101/34
CPCC02F1/30C02F1/725B01J23/8926C02F2101/345C02F2305/10B01J35/39Y02W10/37
Inventor 王齐张晨露石晓东刘恩秦胡含蕾周甜甜
Owner 浙江海宁经编产业园区开发有限公司