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

Visible light-responsive photocatalyst li 2 cu 2 the si 4 o 11 and its preparation method

A photocatalyst, visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Weak effect, etc., to achieve the effects of low cost, wide spectral response range and simple preparation method

Active Publication Date: 2016-09-28
SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, niobate photocatalyst Pb 3 Nb 4 o 13 、BiNbO 4 and Bi 2 MbO 7 (M=Al, Ga, In, Y, rare earth elements and Fe) etc. and niobium potassium composite oxide photocatalysts such as KNbO 3 , KNb 3 o 8 、K 4 Nb 6 o 17 and K 6 Nb 10.6 o 30 have good photocatalytic performance, but their intrinsic photocatalytic effect is weak or inactive in the visible light range.
[0005] Although photocatalysis research has been carried out for several years, the types of photocatalysts with visible light response reported are still very limited, and there are still problems such as low photoconversion efficiency, poor stability and narrow spectral response range, so the research and development of new photocatalysts with Efficient photocatalysts responsive to visible light are highly desirable

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , CuO and SiO 2 The original powder by Li 2 Cu 2 Si 4 O 11 The composition of weighing ingredients.

[0019] (2) Mix the raw materials prepared in step (1), put them in a ball mill, add zirconia balls and distilled water, ball mill for 8 hours, mix and grind finely, take out and dry, and pass through a 200-mesh sieve.

[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 1000 °C, keep the temperature for 6 hours, naturally cool to room temperature, and then pulverize by a ball mill to make the average particle diameter smaller than 2 μm, that is, to obtain Li 2 Cu 2 Si 4 O 11 powder.

[0021] The prepared photocatalyst can achieve a removal rate of 97.9% for methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420 nm.

Embodiment 2

[0023] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , CuO and SiO 2 The original powder by Li 2 Cu 2 Si 4 O 11 The composition of weighing ingredients.

[0024] (2) Mix the raw materials prepared in step (1), put them in a ball mill, add zirconia balls and distilled water, ball mill for 8 hours, mix and grind finely, take out and dry, and pass through a 200-mesh sieve.

[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 1030 °C, keep the temperature for 6 hours, naturally cool to room temperature, and then pulverize by a ball mill to make the average particle diameter smaller than 2 μm, that is, Li is obtained. 2 Cu 2 Si 4 O 11 powder.

[0026] The prepared photocatalyst can remove 98.6% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420 nm.

Embodiment 3

[0028] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , CuO and SiO 2 The original powder by Li 2 Cu 2 Si 4 O 11 The composition of weighing ingredients.

[0029] (2) Mix the raw materials prepared in step (1), put them in a ball mill, add zirconia balls and distilled water, ball mill for 8 hours, mix and grind finely, take out and dry, and pass through a 200-mesh sieve.

[0030] (3) Pre-fire the uniformly mixed powder in step (2) at 1050°C, keep the temperature for 6 hours, cool down to room temperature naturally, and then pulverize by a ball mill to make the average particle diameter smaller than 2 μm, that is, to obtain Li 2 Cu 2 Si 4O 11 powder.

[0031] The prepared photocatalyst can remove 97.5% of methyl orange in 60 min under the irradiation of visible light with a wavelength greater than 420 nm.

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
band gapaaaaaaaaaa
Login to View More

Abstract

The invention discloses a visible-light response photocatalyst Li2Cu2Si4O11 and a preparation method thereof. The photocatalyst has the chemical composition of Li2Cu2Si4O11. The invention also discloses the preparation method of the material. The photocatalyst has the advantages of being wide in spectral response range, high in light conversion efficiency, good in stability and the like, and has the functions of decomposing harmful chemical substances and organism as well as sterilization when being irradiated by visible light; furthermore, the preparation method is simple, the resultant temperature is low and the cost is low, and thus the visible-light photocatalyst is suitable for industrial production and application.

Description

technical field [0001] The invention relates to a visible light-responsive photocatalyst Li 2 Cu 2 Si 4 O 11 The invention and the preparation method thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] With the development of social economy, people pay more and more attention to energy and ecological environment. Solving the problems of energy shortage and environmental pollution is an urgent need to achieve sustainable development, improve people's quality of life and ensure national security. [0003] Since the late 1970s, the use of photocatalysts to decompose organic substances such as pesticides and malodorous substances in water and the atmosphere, and the self-cleaning of photocatalyst-coated solid surfaces have been proposed. The principle of the photocatalytic reaction is that the photocatalyst generates holes and electrons after absorbing photons with energy higher than its band gap. These holes and electrons undergo...

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): B01J23/78
Inventor 唐莹苏和平李洁
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD