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

A high stability tio 2 Nanobelt-rgo-porous carbon nitride composite photocatalyst and preparation method thereof

A high-stability, nano-ribbon technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low catalytic activity improvement ratio and ternary composite material stability to be improved. , to achieve significant visible light catalytic activity and superior stability

Active Publication Date: 2021-11-12
YUNNAN MINZU UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these three components have been combined into composite materials, on the one hand, the prepared ternary composites are relative to the g-C 3 N 4 -TiO 2 or TiO 2 -The increase in the catalytic activity of GR is not high, the main reason is that the ternary material belongs to the disordered assembly hybrid material
On the other hand, the stability of the prepared ternary composites needs to be improved

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 high stability tio <sub>2</sub> Nanobelt-rgo-porous carbon nitride composite photocatalyst and preparation method thereof
  • A high stability tio <sub>2</sub> Nanobelt-rgo-porous carbon nitride composite photocatalyst and preparation method thereof
  • A high stability tio <sub>2</sub> Nanobelt-rgo-porous carbon nitride composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) In the first step, first weigh 5 g of P25 and suspend it in 25 mL of 10 M NaOH aqueous solution, stir for 1 h, transfer to a hydrothermal reaction kettle, stir at 400 rpm, 180 o C reacted in an oil bath for 72 h, cooled, washed with water to pH = 7, then washed with 1 M HCl solution for 1 h, filtered and washed 3 times with water, and dried at 50 for 24 h to obtain TiO 2 nanobelt;

[0029] (2) In the second step, accurately pipette 1mL of a 2mg / mL graphene oxide solution (the volume ratio of water and ethanol is 2:1 as a mixed solvent), and then add 29mL of a mixed solvent of water and ethanol (V water: V ethanol = 2:1), sonicated for 0.5 h, and 0.2 g TiO was added under vigorous stirring 2 Nanobelts were ultrasonically dispersed for 10 min, stirred at room temperature for 2 h, and then the suspension was transferred to a polytetrafluoroethylene high-temperature and high-pressure reactor at 220 o C for 7 h, naturally cooled to room temperature, centrifuged, washed...

Embodiment 2

[0034] (1) In the first step, first weigh 5 g of P25 and suspend it in 25 mL of 10 M NaOH aqueous solution, stir for 1 h, transfer to a hydrothermal reaction kettle, stir at 400 rpm, 180 o C reacted in an oil bath for 72 h, cooled, washed with water to pH = 7, then washed with 1 M HCl solution for 1 h, filtered and washed 3 times with water, and dried at 50 for 24 h to obtain TiO 2 nanobelt;

[0035] (2) In the second step, accurately pipette 1mL of a 2mg / mL graphene oxide solution (the volume ratio of water and ethanol is 2:1 as a mixed solvent), and then add 29mL of a mixed solvent of water and ethanol (V water: V ethanol = 2:1), sonicated for 0.5 h, and 0.2 g TiO was added under vigorous stirring 2 Nanobelts were ultrasonically dispersed for 10 min, stirred at room temperature for 2 h, and then the suspension was transferred to a polytetrafluoroethylene high-temperature and high-pressure reactor at 220 o C for 7 h, naturally cooled to room temperature, centrifuged, washed...

Embodiment 3

[0040] (1) In the first step, first weigh 5 g of P25 and suspend it in 25 mL of 10 M NaOH aqueous solution, stir for 1 h, transfer to a hydrothermal reaction kettle, stir at 400 rpm, 180 o C reacted in an oil bath for 72 h, cooled, washed with water to pH = 7, then washed with 1 M HCl solution for 1 h, filtered and washed 3 times with water, and dried at 50 for 24 h to obtain TiO 2 nanobelt;

[0041] (2) In the second step, accurately pipette 5mL of 2mg / mL graphene oxide (the volume ratio of water and ethanol is 2:1 as a mixed solvent) solution, and then add 25mL of a mixed solvent of water and ethanol (V water: V ethanol = 2:1), sonicated for 0.5 h, and 0.5 g TiO was added under vigorous stirring 2 Nanobelts were ultrasonically dispersed for 10 min, stirred at room temperature for 2 h, and then the suspension was transferred to a polytetrafluoroethylene high-temperature and high-pressure reactor at 220 o C for 7 h, naturally cooled to room temperature, centrifuged, washed 3...

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
lengthaaaaaaaaaa
Login to View More

Abstract

The present invention proposes a high stability TiO 2 Nanobelt-RGO-porous carbon nitride composite photocatalyst and its preparation method: first weigh 0.2-10 g P25 in 10-50 mL 10 M NaOH solution, stir for 0.5-1 h, and stir at 200-600 rpm Down, 120‑180 o C hydrothermal reaction for 24‑72 h, cooled, washed with 1‑3 M HCl for 0.5‑1 h, washed with water for 3‑5 times until neutral, 50‑80 o C dried for 12‑24 h to obtain TiO 2 Nanobelts; secondly, take 1-10mL 2mg / mL graphene oxide solution into 20-29mL water and ethanol mixed solvent (V water: V ethanol = 2:1), sonicate for 0.5-1 h, stir and add 0.1-0.5 g TiO 2 Nanoribbons, sonicate for 5‑20 min, stir for 1‑3 h, 150‑250 o C hydrothermal reaction 5‑10 h, cooling, centrifugation, washing 3‑5 times, 50‑80 o C dried for 12‑24 h to obtain TiO 2 Nanobelt‑RGO; then, weigh 5‑10 g urea at 400‑600 at 0.5‑1.2 mL / min nitrogen o Calcined at C for 1‑4 h and ground to obtain Pg‑C 3 N 4 ; Finally, weigh 0.02‑0.5g TiO 2 Nanoribbon‑RGO and 0.1‑0.3g Pg‑C 3 N 4 Uniform grinding, 400-600 under 0.5-1.2mL / min nitrogen o Calcined at C for 1‑4 h to obtain TiO 2 Nanobelt‑RGO‑Pg‑C 3 N 4 .

Description

technical field [0001] The invention belongs to the field of semiconductor photocatalysts, in particular to a highly stable TiO 2 Preparation method of nanobelt-RGO-porous carbon nitride composite photocatalyst. Background technique [0002] Photocatalytic technology is one of the most promising "environmentally friendly" water treatment technologies, which can degrade organic pollutants into non-toxic carbon dioxide and water under the action of sunlight [1] . Although conventionally used TiO 2 Photocatalyst has the characteristics of stable physical and chemical properties, low cost, non-toxicity and high catalytic activity, but it can only absorb ultraviolet light, and photogenerated electrons-holes are easy to recombine, and the quantum efficiency is low. limitations. Therefore, the research and development of stable, low-cost, and highly active photocatalysts that respond to visible light is the focus and hotspot in the field of photocatalysis. In the present inven...

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): B01J27/24B01J35/10B01J37/10B01J37/34B01J37/08C02F1/30C02F101/34
CPCB01J27/24B01J35/004B01J35/1014B01J37/082B01J37/10B01J37/343C02F1/30C02F2101/305C02F2101/34C02F2305/10
Inventor 罗利军石苗夏丽红李俊红王红斌龙俊宏
Owner YUNNAN MINZU 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