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

A preparation method of an all-solid-state z-type heterojunction photocatalyst

A photocatalyst and heterojunction technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low quantum efficiency, easy recombination, and limit further applications, and achieve photocatalytic activity High, easy to compound, solve the effect of mass transfer problems

Active Publication Date: 2020-03-13
XI AN JIAOTONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among many semiconductor materials, hydrogen tungsten bronze (H x WO 3 ) is favored by researchers for its stable performance, non-toxic and harmless, cheap raw materials, and strong light absorption ability in both visible light and near-infrared light. However, hydrogen tungsten bronze photocatalysts still have few a technical problem, which limits its further application in industry
Such as low quantum efficiency, easy recombination of photogenerated carriers, and no ability to photolyze water to produce hydrogen

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 preparation method of an all-solid-state z-type heterojunction photocatalyst
  • A preparation method of an all-solid-state z-type heterojunction photocatalyst
  • A preparation method of an all-solid-state z-type heterojunction photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of the all-solid-state Z-type heterojunction photocatalyst of the present invention comprises the following steps:

[0043] 1) Add tungstic acid and ammonia water to deionized water A, stir evenly, add oxalic acid and absolute ethanol, then add PS template, then vacuum impregnate, dry and calcinate to obtain 3DOM-WO 3 Catalyst to 3DOM-WO 3 Add deionized water B to the catalyst, then add chloroplatinic acid solution, and stir and irradiate under a xenon lamp by photoreduction method to obtain 3DOM-WO 3 / Pt catalyst, and finally 3DOM-WO 3 / Pt catalyst in H 2 Heat treatment under the atmosphere to get 3DOM-H x WO 3 / Pt;

[0044] 2) Weigh L-cysteine, Cd(NO 3 ) 2 and 3DOM-H x WO 3 / Pt, then L-cysteine, Cd(NO 3 ) 2 and 3DOM-H x WO 3 / Pt is added to water, and then stirred evenly to obtain a mixed solution;

[0045] 3) Add Na to the mixed solution obtained in step 2) 2 S solution, followed by hydrothermal reaction, cooled to room temperatu...

Embodiment 2

[0056] The preparation method of the all-solid-state Z-type heterojunction photocatalyst of the present invention comprises the following steps:

[0057] 1) Add tungstic acid and ammonia water to deionized water A, stir evenly, add oxalic acid and absolute ethanol, then add PS template, then vacuum impregnate, dry and calcinate to obtain 3DOM-WO 3 Catalyst to 3DOM-WO 3 Add deionized water B to the catalyst, then add chloroplatinic acid solution, and stir and irradiate under a xenon lamp by photoreduction method to obtain 3DOM-WO 3 / Pt catalyst, and finally 3DOM-WO 3 / Pt catalyst in H 2 Heat treatment under the atmosphere to get 3DOM-H x WO 3 / Pt;

[0058] 2) Weigh L-cysteine, Cd(NO 3 ) 2 and 3DOM-H x WO 3 / Pt, then L-cysteine, Cd(NO 3 ) 2 and 3DOM-H x WO 3 / Pt is added to water, and then stirred evenly to obtain a mixed solution;

[0059] 3) Add Na to the mixed solution obtained in step 2) 2 S solution, followed by hydrothermal reaction, cooled to room temperatu...

Embodiment 3

[0070] The preparation method of the all-solid-state Z-type heterojunction photocatalyst of the present invention comprises the following steps:

[0071] 1) Add tungstic acid and ammonia water to deionized water A, stir evenly, add oxalic acid and absolute ethanol, then add PS template, then vacuum impregnate, dry and calcinate to obtain 3DOM-WO 3 Catalyst to 3DOM-WO 3 Add deionized water B to the catalyst, then add chloroplatinic acid solution, and stir and irradiate under a xenon lamp by photoreduction method to obtain 3DOM-WO 3 / Pt catalyst, and finally 3DOM-WO 3 / Pt catalyst in H 2 Heat treatment under the atmosphere to get 3DOM-H x WO 3 / Pt;

[0072] 2) Weigh L-cysteine, Cd(NO 3 ) 2 and 3DOM-H x WO 3 / Pt, then L-cysteine, Cd(NO 3 ) 2 and 3DOM-H x WO 3 / Pt is added to water, and then stirred evenly to obtain a mixed solution;

[0073] 3) Add Na to the mixed solution obtained in step 2) 2 S solution, followed by hydrothermal reaction, cooled to room temperatu...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of an all-solid Z-type heterojunction photocatalyst, which includes the following steps: 1) Add tungstic acid and ammonia water into deionized water A, stir evenly, add oxalic acid and absolute ethanol, and then add PS template, then vacuum impregnated, dried and calcined to obtain 3DOM‑WO 3 Catalyst, then add deionized water B, then add chloroplatinic acid solution, and stir and irradiate under a xenon lamp through photoreduction method to obtain 3DOM‑WO 3 / Pt catalyst, and finally heat treatment to obtain 3DOM‑H x WO 3 / Pt; 2) Combine L-cysteine, Cd(NO 3 ) 2 and 3DOM‑H x WO 3 / Pt is added to the water, and then stirred evenly to obtain a mixed solution; 3) Add Na to the mixed solution 2 S solution, and then perform a hydrothermal reaction. After the reaction is completed, it is cooled to room temperature, and then washed, centrifuged and freeze-dried to obtain a Z-type heterojunction photocatalyst. The all-solid Z-type heterojunction photocatalyst prepared by this method The catalyst has the characteristics of high quantum efficiency, difficulty in recombination of photogenerated carriers, and high photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of energy catalysis, and relates to a preparation method of an all-solid-state Z-type heterojunction photocatalyst. Background technique [0002] Hydrogen is a renewable, pollution-free, clean energy with high energy density. It has played an important role in metallurgy, fuel cell, organic synthesis, petrochemical and other industries. At present, hydrogen is mainly produced through water gas conversion, water electrolysis, and hydrocarbon cracking, but these processes have more or less problems such as excessive resource consumption, environmental pollution, and production safety. Therefore, the development of new, economical and efficient hydrogen production technologies is of great significance to the sustainable development of human society. Solar photocatalytic hydrolysis hydrogen production technology is a newly developed hydrogen production technology in recent years. Its principle is that photocat...

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): B01J27/04B01J37/08B01J37/10B01J37/18C01B3/04
CPCC01B3/042B01J27/04B01J37/0018B01J37/10B01J37/18B01J35/399B01J35/23B01J35/39Y02E60/36
Inventor 杨贵东严孝清夏梦阳
Owner XI AN JIAOTONG 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