A kind of composite photocatalyst and preparation method thereof

A catalyst and composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of inability to achieve large-scale production and waste, and achieve a wide range of The effect of application prospect and industrialization prospect, easy operation and stable structure

Active Publication Date: 2020-01-17
HUAIBEI NORMAL UNIVERSITY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, some patents use ultraviolet light to decompose water and produce hydrogen. Hydrogen is indeed an ideal energy source. Under the action of a catalyst, water is decomposed to produce hydrogen and oxygen. After the hydrogen is burned, water is produced, without any pollution to the environment. Moreover, the energy generated is very considerable, and hydrogen can be used to replace traditional energy sources; there are also technical papers that disclose hydrogen production by using ultraviolet light to produce hydrogen, but the proportion of ultraviolet light in sunlight is only 2%, and the rest 98% are all wasted. Although sunlight is infinite, such a small proportion cannot be mass-produced.

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 kind of composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Disperse cadmium nitrate and thioacetamide into 40ml mixed solution at a mass ratio of 0.4:1, the volume ratio of triethylenediamine and deionized water in the mixed solution is 2:1, heat to 80°C for 16h, and then centrifuge , and vacuum dried at 60°C for 6h to obtain CdS nanocrystals.

[0022] CdS nanocrystals are mixed with 15ml ethylene glycol, 0.3g sodium molybdate, and 0.5g bismuth nitrate and added to 25ml deionized water, and the mixed solution is transferred to a 50ml polytetrafluoroethylene-lined stainless steel reactor, heated to React at 180°C for 24 hours to prepare bismuth molybdate and cadmium sulfide composite photocatalyst.

[0023] Such as figure 1 As shown in the photo of the TEM spectrum of the produced bismuth molybdate and cadmium sulfide, the hydrogen production performance can reach 2490 micromoles after 2 hours.

Embodiment 2

[0025] Disperse 20g of cadmium chloride and 15g of sodium sulfide into a 2L mixed solution, the volume ratio of diethylenetriamine and deionized water in the mixed solution is 1:1, then heat the mixed solution to 180°C for 48 h, then centrifuge, Vacuum drying to obtain CdS nanocrystals.

[0026] CdS nanocrystals were mixed with 0.5L Tween, 30g ammonium molybdate, and 15g bismuth chloride into 5L deionized water, and the mixed solution was heated to 200°C for hydrothermal reaction for 36 hours to prepare bismuth molybdate and cadmium sulfide composite photocatalyst.

[0027] Its photocatalytic degradation efficiency of methylene blue dye wastewater reaches 98%.

Embodiment 3

[0029] Disperse 1Kg of cadmium acetate and 1Kg of sublimed sulfur into a 30L mixed solution, the volume ratio of hexamethylenetetramine and deionized water in the mixed solution is 4:1, then heat the mixed solution to 110°C for 30 h, then centrifuge , dried in vacuum to obtain CdS nanocrystals.

[0030] Mix CdS nanocrystals with 1L disodium lauryl sulfosuccinate monoester, 900g molybdenum trioxide, 1.5Kg bismuth subnitrate and add to 7L deionized water, heat the mixed solution to 220°C for 24 hours to produce molybdic acid Bismuth and cadmium sulfide composite photocatalyst.

[0031] Its photocatalytic degradation of heavy metal Cr 3+ Ions are 96% efficient.

[0032] The invention discloses a composite photocatalyst of bismuth molybdate and cadmium sulfide, which can decompose water by using visible light in sunlight to generate hydrogen. Owing to what utilize is visible light to go to produce hydrogen, the ratio that visible light accounts for in sunlight is 49%, and this ...

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 composite photocatalyst and a preparation method thereof. The composite photocatalyst is a bismuth molybdate and cadmium sulfide composite photocatalyst and enables water to produce hydrogen continuously under irradiation of visible light of sunlight. The prepared bismuth molybdate and cadmium sulfide composite photocatalyst has a large-area contact interface and facilitates carrier separation, bismuth molybdate and cadmium sulfide are stable in structure and are in band gap matching, so that photocatalytic activity is improved, catalytic effect is stable, and excellent properties of photocatalytically splitting water into hydrogen, photodegrading organic pollutants and reducing heavy metal ions and carbon dioxide are obtained; the raw materials for the synthetic method are common, the preparation operating process is simple, technological parameters are easy to realize, the cost is low, the operation is simple, the yield is high, the service life cycle is long, and the composite photocatalyst and the preparation method thereof have broad application prospect and industrial prospect in the fields of photocatalytic splitting of water into hydrogen, photodegradation of organic pollutants, reduction of heavy metal ions and carbon dioxide and the like.

Description

technical field [0001] The invention relates to a composite photocatalyst and a preparation method thereof, belonging to the technical field of nanometer material preparation, in particular to a composite nanometer material and a preparation method thereof. Background technique [0002] In recent years, the energy crisis has intensified, oil has become increasingly depleted, and oil prices have risen, resulting in slow global economic growth. Countries have implemented various policies to solve the energy crisis, and some countries have launched wars to seize crude oil, the Iranian Revolution, the Persian Gulf War, and Iraq All wars are for the control of oil, and the ultimate goal is to solve the energy crisis. In order to solve the energy crisis in the world, many new energy sources and new methods have also been developed, such as photolysis hydrogen production, wind power generation, tidal power generation, geothermal power generation, etc., but most of the methods have ...

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): B01J27/051
CPCB01J23/31B01J27/04B01J27/051B01J35/0006B01J35/004
Inventor 代凯李真吕佳丽王中辽霍瑶胡太平张金锋李强
Owner HUAIBEI NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap