A fibrous z-shaped photocatalyst tio for treating organic sewage 2 /g-c 3 no 4 preparation method

A photocatalyst and organic sewage technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, energy wastewater treatment, etc., can solve the problems of potential safety hazards, easy agglomeration of composite materials, and no reports, etc., to broaden the space for photogenerated electrons Hole space distance, easy separation and recycling, and the effect of improving utilization efficiency

Active Publication Date: 2020-03-06
WUHAN POLYTECHNIC UNIVERSITY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing technologies use the solvothermal method, which is complex and uses a large amount of organic solvents or strong corrosive acid HF as catalysts. The prepared composite materials are easy to agglomerate, which requires high requirements for operators and has potential safety hazards.
In addition, the existing technology has not reported the use of electrospinning and in-situ crystallization and calcination to prepare fibrous Z-type photocatalyst TiO for the treatment of organic sewage. 2 / g -C 3 N 4 method report

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 fibrous z-shaped photocatalyst tio for treating organic sewage <sub>2</sub> /g-c <sub>3</sub> no <sub>4</sub> preparation method
  • A fibrous z-shaped photocatalyst tio for treating organic sewage <sub>2</sub> /g-c <sub>3</sub> no <sub>4</sub> preparation method
  • A fibrous z-shaped photocatalyst tio for treating organic sewage <sub>2</sub> /g-c <sub>3</sub> no <sub>4</sub> preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Add 9ml of methanol, 0.3ml of glacial acetic acid, 2ml of tetrabutyl titanate and 0.56g of polyvinylpyrrolidone to the Erlenmeyer flask in turn, stir for 3 hours to obtain a uniform spinning solution, and put the spinning solution into a plastic syringe with a stainless steel needle Carry out high-voltage electrospinning, the spinning voltage is 12kV, the receiving distance is 15cm, and the air humidity is 39%, to obtain tetrabutyl titanate / polyvinylpyrrolidone fiber membrane, put the composite fiber membrane into a temperature-programmed muffle furnace, and heat up The speed is set at 2°C / min, and calcined at 500°C for 2h to obtain porous TiO 2 Nanofibers.

[0033] Weigh the above porous TiO 2 Add 360 mg of nanofibers to 50 ml of distilled water, and ultrasonically grind the porous TiO 2 The nanofibers were crushed into short fibers and dispersed evenly in water, then 3 g of melamine was added, stirred by magnetic force and heated to 98 ° C, and the distilled water wa...

Embodiment 2

[0035] Add 8ml of methanol, 0.4ml of glacial acetic acid, 2ml of tetrabutyl titanate and 0.7g of polyvinylpyrrolidone to the Erlenmeyer flask in turn, and stir for 3.5h to obtain a uniform spinning solution. The syringe was subjected to high-voltage electrospinning, the spinning voltage was 12kV, the receiving distance was 15cm, and the air humidity was 35% to obtain a tetrabutyl titanate / polyvinylpyrrolidone fiber membrane, and the composite fiber membrane was placed in a temperature-programmed muffle furnace, The heating rate is set at 2°C / min, and calcined at 500°C for 2 hours to obtain porous TiO 2 Nanofibers.

[0036] Weigh the above porous TiO 2 Add 90 mg of nanofibers to 45 ml of distilled water, and ultrasonically grind the porous TiO 2 The nanofibers were crushed into short fibers and dispersed evenly in water, then 3.0 g of melamine was added, stirred by magnetic force and heated to 98 ° C, and the distilled water was evaporated to dryness, and the melamine in the ...

Embodiment 3

[0038] Add 7ml of methanol, 0.4ml of glacial acetic acid, 2.5ml of tetrabutyl titanate and 0.8g of polyvinylpyrrolidone to the Erlenmeyer flask in sequence, and stir for 3.5h to obtain a uniform spinning solution. High-voltage electrospinning was carried out with a plastic syringe, the spinning voltage was 14kV, the receiving distance was 14cm, and the air humidity was 35% to obtain tetrabutyl titanate / polyvinylpyrrolidone fiber membrane, and the composite fiber membrane was placed in a temperature-programmed muffle furnace , the heating rate was set at 2.5°C / min, and calcined at 500°C for 1.5h to obtain porous TiO 2 Nanofibers.

[0039] Weigh the above porous TiO 2 Add 180 mg of nanofibers to 45 ml of distilled water, and ultrasonically grind the porous TiO 2 The nanofibers were crushed into short fibers and dispersed evenly in water, then 4 g of melamine was added, magnetically stirred and heated to 99 ° C, and the distilled water was evaporated to dryness, and the melamin...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of organic sewage degradation photocatalysts, and in particular relates to a method for preparing a fiber-like Z-type photocatalyst TiO2 / g-C3N4 for treating organic sewage. The photocatalyst is prepared by using electrostatic spinning and in-situ crystallization calcining methods, specifically, the method comprises the following steps: preparing a porous TiO2 nanofiber by using an electrostatic spinning method; and by taking water as a solvent, implementing an in-situ crystallization method to carry out in-situ separation on melamine on the surface of the porous TiO2 nanofiber, and implementing a calcining process, thereby obtaining the fiber-like Z-type photocatalyst TiO2 / g-C3N4. The method is simple, the problems of aggregation of G-C3N4 and low specific surface areas are effectively solved, the fiber-like Z-type photocatalyst TiO2 / g-C3N4 which is good in morphology is prepared by adjusting the amount of melamine, the Z-type photocatalyst is capable of effectively widening the space distances of photo-induced electron holes and inhibiting combination of the photo-induced electron holes, then the photocatalytic degradation efficiency is greatly improved, sunshine can be well captured through one-dimensional fiber morphology, and the photocatalyst is easy to separate and recycle and relatively good in recycling photocatalytic performance.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts for organic sewage degradation, in particular to a fibrous Z-type photocatalyst TiO for treating organic sewage 2 / g -C 3 N 4 method of preparation. Background technique [0002] High-efficiency photocatalysts responsive to sunlight have been extensively studied for applications in sewage treatment and comprehensive utilization of solar energy. TiO 2 It is one of the common semiconductor materials, which has the advantages of good photoelectric performance, photocatalytic performance, good chemical stability, and non-toxicity, but its band gap is wide and can only be absorbed by a very small proportion of ultraviolet light in sunlight. Excited, it does not respond to visible light, which accounts for about 50% of sunlight, and photogenerated electrons and holes are easy to recombine. g-C 3 N 4 It is a non-metallic photocatalyst with strong visible light absorption, but the specific s...

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): B01J27/24C02F1/30C02F101/30
CPCB01J27/24B01J35/004C02F1/30C02F2101/30C02F2305/10Y02W10/37
Inventor 王春蕾闫俊涛李建芬柴波
Owner WUHAN POLYTECHNIC UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap