Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of composite photocatalyst and its preparation method and the application of this catalyst in degrading organic dye

A technology of organic dyes and catalysts, applied in the field of materials

Active Publication Date: 2021-10-15
HUBEI NORMAL UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in BiVO 4 / Bi 4 V 2 o 11 Further doping or deposition is rarely reported

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
  • A kind of composite photocatalyst and its preparation method and the application of this catalyst in degrading organic dye
  • A kind of composite photocatalyst and its preparation method and the application of this catalyst in degrading organic dye
  • A kind of composite photocatalyst and its preparation method and the application of this catalyst in degrading organic dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of composite photocatalyst of the present embodiment, described composite photocatalyst is made of Ag and BiVO 4 / Bi 4 V 2 o 11 Composite material composition, wherein the mass fraction of Ag is 43.2%, that is, Ag and BiVO 4 / Bi 4 V 2 o 11 The mass ratio of the composite material is 0.76.

[0032] A kind of preparation method of composite photocatalyst of the present embodiment, comprises the following steps:

[0033] (1) BiVO 4 / Bi 4 V 2 o 11 Preparation of composite materials

[0034] Weigh 0.485g Bi(NO 3 ) 3 ·5H 2 O dissolved in 8mL H 2 O and 2 mL HNO 3 In a 25mL beaker, a transparent solution A was obtained after stirring for 30 minutes;

[0035] Add 0.117g NH 4 VO 3 Dissolve 0.1g EDTA in 10mL NaOH solution with a concentration of 4mol / L, and obtain B solution after ultrasonication for 30min;

[0036] Add solution B to solution A dropwise, stir for 10 minutes, and then use 2mol / L NaOH solution and 2mol / L HNO 3 Adjust the pH of the mixed ...

Embodiment 2

[0040] In order to verify the composite photocatalyst prepared in Example 1, the obtained Ag / BiVO 4 / Bi 4 V 2 o 11 The composite photocatalyst was analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM). The test results are shown in figure 1 and figure 2 , figure 1 The two curves in the BiVO 4 / Bi 4 V 2 o 11 Composites and Ag / BiVO 4 / Bi 4 V 2 o 11 The XRD pattern of the composite photocatalyst, figure 2 and image 3 BiVO 4 / Bi 4 V 2 o 11 and Ag / BiVO 4 / Bi 4 V 2 o 11 SEM image of the composite photocatalyst.

[0041] Depend on figure 1 It can be seen that BiVO 4 / Bi 4 V 2 o 11 The characteristic diffraction peaks also contain monoclinic BiVO 4 (JCPDS 75-1866) and Bi in the orthorhombic phase 4 V 2 o 11 (JCPDS 42-0135). in BiVO 4 / Bi 4 V 2 o 11 After the introduction of metal Ag, the Ag / BiVO 4 / Bi 4 V 2 o 11 The characteristic diffraction peaks are basically the same as those of BiVO 4 / Bi 4 V 2 o 11 Consistent, no...

Embodiment 3

[0047] In order to verify the Ag / BiVO 4 / Bi 4 V 2 o 11 The photocatalytic activity of the composite photocatalyst was tested with rhodamine B (RhB) as a model pollutant. At present, commercial P25 is often used for photocatalytic degradation of RhB, so P25 is used as a reference, and the Ag / BiVO 4 / Bi 4 V 2 o 11 Composite Photocatalysts for Activity Evaluation, Simultaneously Studying Ag and BiVO 4 / Bi 4 V 2 o 11 Effects of different mass ratios on the catalytic activity of composite photocatalysts.

[0048] The RhB solution that 50mL concentration is 5mg / L is slowly poured into the AgNO prepared in Example 1 3 / BiVO 4 / Bi 4 V 2 o 11 In the beaker of the precursor, obtain the reaction mixture. In order for the adsorption-desorption to reach equilibrium, the reaction mixture was magnetically stirred for 30 min in the dark before turning on the light. Use a 300W xenon lamp (CEL-HXF300 from Zhongjiao Jinyuan) to simulate a visible light source, and illuminate for...

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 composite photocatalyst, a preparation method thereof, and an application of the catalyst in degrading organic dyes. The invention first adopts a simple and stable hydrothermal method to synthesize BiVO 4 / Bi 4 V 2 O 11 Composites followed by in situ photoreduction of AgNO during photocatalytic degradation of the dye Rhodamine B 3 Get Ag / BiVO 4 / Bi 4 V 2 O 11 composite photocatalyst to enhance the photocatalytic degradation activity; the present invention studies the crystal shape, morphology and specific surface area of ​​the composite photocatalyst through XRD, SEM and BET, and the capture experiment proves that the photocatalytic degradation process plays an important role in the degradation process. Active species for degradation, providing strong evidence for the degradation of RhB; Ag / BiVO of the present invention 4 / Bi 4 V 2 O 11 The composite photocatalyst has a simple preparation method and high photocatalytic activity, which opens up a new idea for the catalytic degradation of organic dyes.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a composite photocatalyst, a preparation method thereof and an application of the catalyst in degrading organic dyes. Background technique [0002] Due to the increase in population and the demand for the development of the chemical industry, the problem of environmental pollution is becoming more and more serious day by day. Therefore, the problem of environmental pollution has been closely concerned by all walks of life at home and abroad, and the research on how to reduce environmental pollution is also imminent. After years of research and exploration, as well as the advantages of solar energy as a renewable resource, the technology of visible light catalytic degradation of pollutants has emerged as the times require. This technology has the advantages of convenient operation, no re-pollution, and complete degradation. As a result, photocatalysis has set off a research boo...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B01J35/10C02F1/30C02F1/72C02F101/34C02F101/36C02F101/38
Inventor 吕宝兰梁梦君章福清杨水金
Owner HUBEI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com