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

C3N4-Bi2O3-BiOI-TiO2NTs visible-light response photocatalysis electrode as well as preparation method and application thereof

A photocatalytic and visible light technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve problems such as difficult treatment and secondary pollution, and achieve the effect of improving the effect

Inactive Publication Date: 2017-01-25
ZHEJIANG GONGSHANG UNIVERSITY
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first three methods do not change the valence state of hexavalent chromium, which leads to the risk of secondary pollution
The chemical precipitation method of hexavalent chromium requires a large amount of chemical reagents, and the electrolysis of hexavalent chromium produces a large amount of sludge, which is difficult to handle

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
  • C3N4-Bi2O3-BiOI-TiO2NTs visible-light response photocatalysis electrode as well as preparation method and application thereof
  • C3N4-Bi2O3-BiOI-TiO2NTs visible-light response photocatalysis electrode as well as preparation method and application thereof
  • C3N4-Bi2O3-BiOI-TiO2NTs visible-light response photocatalysis electrode as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] TiO 2 Nanotube Array Electrode, C 3 N 4 -Bi 2 o 3 / TiO 2 Nanotube array electrodes and C 3 N 4 -Bi 2 o 3 -BiOI / TiO 2The nanotube array electrode was tested for the reduction kinetics of Cr(VI). In a reactor equipped with a working electrode and a Ti sheet as a counter electrode, chromium-containing wastewater containing 1ml of a hole-trapping agent was added, and the pH value was adjusted to 3 , after stirring and adsorption equilibrium in the dark, apply voltage, turn on the light source, and carry out the reaction, and the reaction lasts for 160 minutes.

[0065] The photocatalytic degradation effects of different types of nanotube array electrodes under visible light conditions are as follows: figure 1 shown. To verify C 3 N 4 -Bi 2 o 3 -BiOI / TiO 2 Ternary composite catalytic electrode compared with the original substrate TiO 2 The photocatalytic performance of the nanotube array electrode has been significantly improved, from figure 1 From the data...

Embodiment 2

[0067] Determination of C by electrochemical workstation 3 N 4 -Bi 2 o 3 -BiOI / TiO 2 The photochemical performance test of the nanotube electrode, firstly with the prepared C 3 N 4 -Bi 2 o 3 -BiOI / TiO 2 The nanotube electrode is the working electrode, the Pt sheet is the counter electrode, the Ag / AgCl is the reference electrode, and the Na 2 SO 4 (0.1mol / L) and Na 2 SO 3 (0.1mol / L) solution is the electrolyte. by C 3 N 4 -Bi 2 o 3 -BiOI / TiO 2 The nanotube electrode was scanned to obtain the volt-ampere curve. The light source in this experiment was a xenon lamp (500W). Under the condition that the positions of the electrodes and the light source were consistent, scanning of visible light was carried out respectively. and with C 3 N 4 -Bi 2 o 3 / TiO 2 Nanotube electrode, Bi 2 o 3 / TiO 2 Nanotube electrodes, TiO 2 The photocurrents of nanotube electrodes under visible light and ultraviolet light were compared.

[0068] From figure 2 It can be seen th...

Embodiment 3

[0070] Change g-C in preparation steps (4) and (5) 3 N 4 The amount added to prepare the resulting different g-C 3 N 4 Added amount of C 3 N 4 -Bi 2 o 3 -BiOI / TiO 2 The nanotube electrode is the working electrode, the Pt sheet is the counter electrode, the Ag / AgCl is the reference electrode, and the Na 2 SO 4 (0.1mol / L) and Na 2 SO 3 (0.1mol / L) solution is the electrolyte. by C 3 N 4 -Bi 2 o 3 -BiOI / TiO 2 The nanotube electrode was scanned to obtain the volt-ampere curve. The light source in this experiment was a xenon lamp (500W). Under the condition that the positions of the electrodes and the light source were consistent, the visible light scans were carried out respectively. The results are as follows: image 3 shown. From image 3 It can be seen from the data that when adding different masses of g-C 3 N 4 Next, the prepared C 3 N 4 -Bi 2 o 3 -BiOI / TiO 2 The photocurrent difference of the nanotube array electrode is more obvious, when adding 0.02g ...

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 C3N4-Bi2O3-BiOI-TiO2NTs visible-light response photocatalysis electrode as well as a preparation method and application thereof. The preparation method comprises the following steps of (1) preparing a sodium hydroxide alcoholic solution B and a bismuth nitrate pentahydrate ethylene glycol solution A containing g-C3N4, alternately leaching a TiO2NTs electrode with the solution A and the solution B, and washing the TiO2NTs electrode with absolute ethyl alcohol after each leaching; (2) drying the electrode obtained in the step (1), calcinating the electrode in air atmosphere, cooling the electrode, then flushing the electrode with distilled water, and airing the electrode so as to obtain a C3N4-Bi2O3-TiO2NTs electrode; and (3) immerging the C3N4-Bi2O3-TiO2NTs electrode into a KI ethanol aqueous solution, taking out the C3N4-Bi2O3-TiO2NTs electrode, firstly airing the C3N4-Bi2O3-TiO2NTs electrode, and processing the C3N4-Bi2O3-TiO2NTs electrode at a constant temperature of 70-90 DEG C for 8-12 hours. The preparation method of the electrode is simple; the C3N4-Bi2O3-BiOI-TiO2NTs visible-light response photocatalysis electrode is strong in visible-light response, can achieve an obvious effect on Cr(VI) wastewater treatment, has no second pollution and can be used for multiple times.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a C 3 N 4 -Bi 2 o 3 -BiOI-TiO 2 Preparation method and application of NTs visible light-responsive photocatalytic electrode. Background technique [0002] Chromium generally exists in two forms, Cr(III) and Cr(VI). From a nutritional point of view, Cr(III) is an important trace metal, while Cr(VI) is a DNA-damaging carcinogen. High concentrations of Cr(VI) are found in cooling towers and in wastewater from electroplating, tanning, printing and dyeing and manufacturing industries. [0003] Therefore, it is of great significance to study the reduction of hexavalent chromium to trivalent chromium in aqueous solution. Techniques currently commonly used to eliminate hexavalent chromium include adsorption, filtration, ion exchange, chemical precipitation, electrolysis, and photocatalytic reduction. The first three methods do not change the valence state of hexa...

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): C02F1/30C02F1/461C02F1/62C02F101/22
CPCC02F1/30C02F1/46109C02F2001/46133C02F2101/22
Inventor 王齐张晨露刘恩秦卓颖邹紫莹黄思伟岳子原
Owner ZHEJIANG GONGSHANG UNIVERSITY
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