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

A phosphorus-doped zinc cadmium sulfide solid solution catalyst, photocatalytic system and method for splitting water to produce hydrogen

A technology of zinc cadmium sulfide and solid solution, which is applied in the field of photocatalysis, can solve the problems of secondary pollution of the natural environment, waste of resources, etc., and achieve the effects of improving light absorption performance, mild reaction conditions, and simple operation

Active Publication Date: 2020-09-18
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of the sacrificial agent itself is a waste of resources, and if the decomposition is not complete, it will cause secondary pollution to the natural environment

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 phosphorus-doped zinc cadmium sulfide solid solution catalyst, photocatalytic system and method for splitting water to produce hydrogen
  • A phosphorus-doped zinc cadmium sulfide solid solution catalyst, photocatalytic system and method for splitting water to produce hydrogen
  • A phosphorus-doped zinc cadmium sulfide solid solution catalyst, photocatalytic system and method for splitting water to produce hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A kind of phosphorus-doped zinc cadmium sulfide solid solution catalyst, its chemical formula is P-CdS, and preparation method comprises the steps:

[0056] 1) Dissolve 2 mmol of cadmium acetate dihydrate in 75 mL of deionized water. Then take 2mmol thiourea and dissolve in the above solution. After electromagnetic stirring at room temperature for 1 h, 5 mL of hydrazine hydrate was added dropwise to the above mixed solution. Then all the reaction solution was transferred to a polytetrafluoroethylene reactor with a volume of 100mL, and hydrothermally reacted at 180°C for 24h. After the reaction was completed, it was naturally cooled to room temperature. Finally, after several times of centrifugation, washing with deionized water, and drying at 60° C. for 12 hours, the CdS catalyst was obtained.

[0057] 2) Take 100 mg of CdS prepared in step 1) and 500 mg of NaH 2 PO 2 Grind in an agate mortar to mix well. Then the above solid was placed in a porcelain boat and heat...

Embodiment 2

[0061] A kind of phosphorus-doped zinc cadmium sulfide solid solution catalyst, its chemical formula is P-Zn 0.5 Cd 0.5 S, the preparation method comprises the steps:

[0062] 1) Dissolve 1 mmol of cadmium acetate dihydrate and 1 mmol of zinc acetate dihydrate in 75 mL of deionized water at the same time, and disperse evenly by ultrasonication. Then take 2 mmol thiourea in the above mixed solution, and disperse evenly by ultrasonic. After electromagnetic stirring at room temperature for 1 h, 5 mL of hydrazine hydrate was added dropwise to the above mixed solution. Then all the reaction solution was transferred to a polytetrafluoroethylene reactor, and hydrothermally reacted at 180° C. for 24 hours, and naturally cooled to room temperature after the reaction was completed. Finally, the Zn 0.5 Cd 0.5 S solid solution.

[0063] 2) Take 100mg of Zn prepared in step 1) 0.5 Cd 0.5 S solid solution with 500mg NaH 2 PO 2 Grind in an agate mortar to mix well. Then put the ab...

Embodiment 12

[0077] Photocatalytic system, including phosphorus-doped zinc cadmium sulfide solid solution catalyst and water, wherein the phosphorus-doped zinc cadmium sulfide solid solution catalyst adopts the P-Zn prepared in Example 1~Example 11 respectively x Cd 1-x S (x=0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0).

[0078] The above 11 kinds of photocatalytic systems are used for photocatalytic water splitting, including the following steps:

[0079]Add 1 mg phosphorus-doped zinc cadmium sulfide solid solution catalyst and 5 mL water into a quartz tube with a total volume of 15 mL, pass argon gas for 30 min to remove oxygen, and seal it with a rubber stopper. The sample tube was kept stirring continuously with a magnetic stirrer at room temperature, and the light source for illumination was an LED lamp (λ≥420nm). The amount of hydrogen gas produced after 2 hours of illumination was detected by gas chromatography (GC-14C, Shimadzu). The type of molecular sieve column is ...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a phosphorus-doped zinc-cadmium sulfide solid solution catalyst. The chemical formula of the phosphorus-doped zinc-cadmium sulfide solid solution catalyst is P-Zn x cd 1‑x S, where 0≤x≤1. The invention also discloses a preparation method of the phosphorus-doped zinc-cadmium sulfide solid solution catalyst, which includes the following steps: mixing the zinc-cadmium sulfide solid solution with a phosphorus source and then performing a phosphating reaction to prepare a phosphorus-doped zinc-cadmium sulfide solid solution catalyst. The preparation method of the present invention has fewer types of raw materials, is cheap and easy to obtain, has mild reaction conditions and is simple to operate. The invention also discloses a photocatalytic system including the phosphorus-doped zinc cadmium sulfide solid solution catalyst. The photocatalytic system does not need to add any cocatalyst and electron sacrificial agent. The reaction system is simple and it catalyzes water decomposition under pure water conditions. More conducive to practical applications.

Description

technical field [0001] The invention relates to the technical field of photocatalysis. More specifically, it relates to a phosphorus-doped zinc-cadmium sulfide solid solution catalyst, a photocatalytic system and a method for splitting water to produce hydrogen. Background technique [0002] In recent years, semiconductor photocatalysis technology has attracted much attention because of its broad application prospects in solving environmental pollution problems and alleviating energy crises. Among them, the narrow-bandgap semiconductor cadmium sulfide (CdS), which can respond to visible light and has a suitable energy band position, has attracted extensive research. However, the low separation efficiency of photogenerated electron-hole pairs of cadmium sulfide and severe photocorrosion phenomenon limit its practical application. In order to improve the photocatalytic activity and stability of cadmium sulfide, it can be combined with zinc sulfide with similar lattice struct...

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): B01J27/14B01J35/02C01B3/04B01J35/00
CPCC01B3/042B01J27/14C01B2203/0277C01B2203/1041B01J35/39B01J35/40Y02E60/36
Inventor 陈勇野惠芳石睿
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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