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

A biocl/al2o3 heterojunction material with photocatalytic activity and its preparation method

A photocatalytic activity, heterojunction technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of limited contact area, limited transfer speed of photogenerated carriers, etc. The preparation process is simple, it is beneficial to the transfer of electrons and catalytic activity, and the effect of broadening the application

Active Publication Date: 2019-03-05
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are currently two problems in constructing heterojunctions: one is to find heterojunction materials that are cheap and can match energy levels
At present, most heterostructures are built by synthesizing one semiconductor and then loading another semiconductor by precipitation, hydrothermal and other methods. The contact area between the two is limited, which limits the transfer speed of photogenerated carriers.

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 biocl/al2o3 heterojunction material with photocatalytic activity and its preparation method
  • A biocl/al2o3 heterojunction material with photocatalytic activity and its preparation method
  • A biocl/al2o3 heterojunction material with photocatalytic activity and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 Prepare pure BiOCl according to the following steps

[0020] ① Mix 0.005 mol of bismuth nitrate and 0.005 mol of diethylamine hydrochloride, heat to melt to form ionic liquid;

[0021] ② Heat the ionic liquid described in step ① in a tube furnace at a heating rate of 10 ℃ / min until the ionic liquid burns, and the combustion produces a large amount of smoke and releases a large amount of heat;

[0022] ③Collect the solid produced after the complete combustion in step ②, cool and grind to obtain powder.

[0023] The above powders were tested by XRD and UV-Vis DRS respectively, and the test patterns were as follows: figure 1 and figure 2 shown. figure 1 aXRD results show that the powder is pure BiOCl; figure 2 It can be seen from the figure that the pure BiOCl prepared in this example has absorption in the ultraviolet and visible light regions, and the absorption in the visible light region may come from the surface oxygen vacancies. SEM pictures such as...

Embodiment 2

[0025] Example 2 Prepare pure Al according to the following steps 2 o 3

[0026] ① Mix 0.010 mol aluminum nitrate and 0.010 mol diethylamine hydrochloride and heat until ionic liquid is formed;

[0027] ②Heat the above-mentioned ionic liquid in a resistance furnace at a heating rate of 50 ℃ / min until the ionic liquid burns, and the combustion produces a large amount of smoke and heat;

[0028] ③Collect the solid produced after the complete combustion in step ②, cool and grind to obtain a white powder.

[0029] Carry out XRD and UV-Vis DRS test to above-mentioned white powder, its pattern see respectively figure 1 and figure 2 . Depend on figure 1 a can see Al 2 o 3 There are no obvious characteristic peaks, in order to find Al 2 o 3 The crystalline phase, the enlarged Al 2 o 3 XRD as figure 1 As shown in b, there are mainly three diffraction peaks at 37.4°, 45.5° and 66.9°, corresponding to cubic γ-Al 2 o 3 (311), (400) and (440) diffractive phases of (JCPDS ...

Embodiment 3

[0031] Example 3 Prepare BiOCl / Al according to the following steps 2 o 3 Heterojunction

[0032] ① Mix and heat 0.002 mol bismuth nitrate, 0.010 mol aluminum nitrate and 0.010 mol diethylamine hydrochloride until ionic liquid is formed;

[0033] ②Heat in the tube furnace at a heating rate of 5 ℃ / min until the ionic liquid burns, and the combustion produces a lot of smoke and heat;

[0034] ③ Collect the solids produced after complete combustion, cool and grind to obtain BiOCl / Al 2 o 3 Heterojunction powder, the sample is named 0.4BA. Its XRD and UV-Vis DRS patterns refer to figure 1 a and figure 2 .

[0035] According to the method of Example 1, the visible light catalytic activity test was carried out, and the results showed that the degradation rate of phenol was 25.4% after irradiating for 240 min, as Figure 4 shown.

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 BiOCl / Al with photocatalytic activity 2 O 3 Heterojunction materials and preparation methods thereof. The BiOCl / Al 2 O 3 The heterojunction material consists of BiOCl and Al with a molar ratio of (0.4~2.0): 1 2 O 3 composition. The above BiOCl / Al 2 O 3 The preparation of heterojunction materials is carried out according to the following steps: (1) Mix bismuth nitrate, aluminum nitrate and diethylamine hydrochloride in a molar ratio of (0.2~1.0):1: (1.0~3.5), and heat to Melt to obtain ionic liquid; (2) Continue to heat the ionic liquid obtained in step (1) until burning; (3) Collect the solid produced after complete combustion in step (2), cool and grind to obtain BiOCl / Al 2 O 3 Heterojunction materials. The preparation method of the invention is simple, does not require complicated equipment, is short in time, has high yield and low cost, and is suitable for industrial mass production.

Description

technical field [0001] The invention relates to a heterojunction material with photocatalytic activity, in particular to a BiOCl / Al material with photocatalytic activity 2 o 3 Heterojunction materials and methods for their preparation. Background technique [0002] With the development of the economy, the environmental pollution is becoming more and more serious, and the energy is being exhausted day by day. People are eager to seek a new clean energy. The pollution-free and inexhaustible characteristics of solar energy have attracted more and more attention. The nanophotocatalytic degradation of organic pollutants using sunlight has also attracted widespread attention. Photocatalytic technology not only has good prospects in the degradation of pollutants, but also has great applications in energy conversion, such as photolysis of water to produce hydrogen, photoreduction of CO 2 Wait. Among many photocatalysts, nano-TiO 2 Because of its high efficiency, non-toxic, goo...

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): B01J27/125
CPCB01J27/125B01J35/39
Inventor 李发堂李义磊刘瑞红
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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