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

Efficient near-infrared light responsive compound photocatalyst, preparation method and application thereof

A near-infrared photoresponse and composite light technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high cost and limited enhancement effect of long-wavelength sunlight absorption, and achieve expansion Response range, effect of improving up-conversion luminous efficiency

Active Publication Date: 2019-07-23
ZHEJIANG UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have limited effect on enhancing the absorption of long-wavelength sunlight and are cost prohibitive.

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
  • Efficient near-infrared light responsive compound photocatalyst, preparation method and application thereof
  • Efficient near-infrared light responsive compound photocatalyst, preparation method and application thereof
  • Efficient near-infrared light responsive compound photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A preparation method of a composite photocatalyst with high efficiency near-infrared photoresponse, comprising the following steps:

[0047] First, NaGdF was synthesized by co-precipitation method 4 :49%Yb / 1%Tm, that is, the molar ratio of Gd:Yb:Tm=0.5:0.49:0.01, 1mL gadolinium acetate aqueous solution (0.2M, i.e. 0.2mol / L), 0.98mL ytterbium acetate aqueous solution (0.2M, That is, 0.2mol / L) and 0.2mL thulium acetate aqueous solution (0.02M, ie 0.2mol / L) were added to a 50mL two-necked flask containing 4mL oleic acid, and the above mixed solution was stirred and heated in an oil bath, and the temperature was raised to 150°C. After all the water was removed, 6 mL of 1-octadecene was added and maintained for 1 hour, then the heating was stopped and cooled to room temperature 25°C with stirring. 3.3mLNH 4 Mix F methanol solution (0.4M, ie 0.4mol / L) and 2mL NaOH methanol solution (0.5M, ie 0.5mol / L) and quickly add to the two-necked flask, heat to 50°C under stirring and ...

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 an efficient near-infrared light responsive compound photocatalyst, a preparation method and an application thereof in photocatalytic degradation of organic pollutants in water. The preparation method comprises the following steps: utilizing a hydrothermal method to compound an up-conversion material NaGdF4:49%Yb / 1%Tm@NaGdF4, and then combining the up-conversion material with the photocatalyst, thereby generating a novel compound photocatalyst NaGdF4: Yb / Tm@NaGdF4@TiO2. Under near-infrared light, the photocatalyst is capable of quickly degrading wastewater containing dyestuff rhodamine B. The technology is capable of efficiently utilizing solar energy, is capable of effectively degrading organic pollutants in waste, is safe and nontoxic and is free from secondary pollution to environment.

Description

technical field [0001] The invention relates to the field of environmental functional materials, in particular to a composite photocatalyst with high-efficiency near-infrared light response, a preparation method thereof, and an application in photocatalytic degradation of organic pollutants in water bodies. Background technique [0002] Since the last century, with the rapid development of various industries, especially petrochemical, printing and dyeing industries, various wastewater containing organic pollutants has entered the water body, causing serious environmental pollution and threatening the health of various organisms. These pollutants last for a long time, are not completely decomposed, and the intermediate products are highly toxic and complex in composition. Traditional water treatment methods such as chemical precipitation, physical adsorption, etc. only transfer pollutants from one medium to another, and often require secondary treatment to achieve material re...

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): B01J27/135C02F1/30C02F1/32C02F101/30C02F101/38
CPCB01J27/135C02F1/30C02F1/32C02F2101/308C02F2101/38C02F2305/10C02F2103/30B01J35/39
Inventor 王娟王嘉莹汪海英
Owner ZHEJIANG UNIV