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

Weak visible light response compound photocatalyst and preparation thereof and application thereof

A photocatalyst, visible light technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as weak phenol, achieve easy operation, low cost, Simple preparation method

Inactive Publication Date: 2018-10-12
ZHEJIANG GONGSHANG UNIVERSITY
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the interference of salt ions in the seawater system, the activity of the two catalysts to photodegrade phenol in seawater under weak ultraviolet light was significantly weaker than that in pure water under the same conditions.

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
  • Weak visible light response compound photocatalyst and preparation thereof and application thereof
  • Weak visible light response compound photocatalyst and preparation thereof and application thereof
  • Weak visible light response compound photocatalyst and preparation thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Catalyst preparation

[0054] Dissolve 3.18 mg of lanthanum nitrate in 50 mL of absolute ethanol, stir in a water bath until it is completely dissolved, then quickly add 2.5 g of tetrabutyl titanate. Under the protection of nitrogen, the temperature of the water bath was raised to 80° C. and stirred for 2 hours, and then cooled to room temperature to form a composite reactant solution A (the atomic ratio of La and Ti was 0.1:100). Another 0.5g graphene oxide (specific surface area 50m 2 / g), 200mL of absolute ethanol and 1.5mL of deionized water were placed in a flask, stirred and adsorbed in a water bath at 30°C. After adsorption equilibrium (12 hours), a stable adsorption water layer was formed on the surface of graphene oxide, and finally adsorption system B was formed.

[0055] The reaction solution system A was dropped into the adsorption system B dropwise using a constant pressure funnel. The tetrabutyl titanate prepolymer doped with La ions diffuses into t...

Embodiment 2

[0098] (1) Catalyst preparation

[0099] Dissolve 6.36 mg of lanthanum nitrate in 50 mL of absolute ethanol, stir in a water bath until it is completely dissolved, and then quickly add 2.5 g of tetrabutyl titanate. Under the protection of nitrogen, the temperature of the water bath was raised to 80° C. and stirred for 2 hours, and then cooled to room temperature to form a composite reactant solution A (the atomic ratio of La and Ti was 0.1:100). Another 0.5g graphene oxide (specific surface area 50m 2 / g), 200mL of absolute ethanol and 1.5mL of deionized water were placed in a flask, stirred and adsorbed in a water bath at 30°C. After adsorption equilibrium (12 hours), a stable adsorption water layer was formed on the surface of graphene oxide, and finally adsorption system B was formed.

[0100] The reaction solution system A was dropped into the adsorption system B dropwise using a constant pressure funnel. The tetrabutyl titanate prepolymer doped with La ions diffuses in...

Embodiment 3

[0113] (1) Catalyst preparation

[0114] Dissolve 3.30 mg of ytterbium nitrate in 50 mL of absolute ethanol, stir in a water bath until it is completely dissolved, and then quickly add 2.5 g of tetrabutyl titanate. Under the protection of nitrogen, the temperature of the water bath was raised to 80° C. and stirred for 2 hours, and then cooled to room temperature to form a composite reactant solution A (the atomic ratio of La and Ti was 0.1:100). Another 0.5g graphene oxide (specific surface area 50m 2 / g), 200mL of absolute ethanol and 1.5mL of deionized water were placed in a flask, stirred and adsorbed in a water bath at 30°C. After adsorption equilibrium (12 hours), a stable adsorption water layer was formed on the surface of graphene oxide, and finally adsorption system B was formed.

[0115] The reaction solution system A was dropped into the adsorption system B dropwise using a constant pressure funnel. The tetrabutyl titanate prepolymer doped with Yb ions diffuses in...

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 sizeaaaaaaaaaa
Login to View More

Abstract

The present invention discloses a weak visible light response compound photocatalyst and a preparation thereof and an application thereof. The preparation is as follows: (1) rare earth ion nitrate andtetrabutyl titanate are mixed and dissolved to form a compound reactant solution A; (2) graphene oxide, absolute ethyl alcohol and deionized water are mixed and dissolved to form an adsorption systemB; (3) in a water bath stirring, the compound reactant solution A is slowly added dropwise to the adsorption system B to obtain a suspension system; (4) the suspension system is transferred into a high-pressure autoclave; and a hot treatment is conducted at 160 DEG C-180 DEG C after sealing; and (5) the hot-treated reaction liquid is cooled; the cooled reaction liquid is separated; and washing and drying are conducted to obtain the catalyst. The radius of the rare earth metal ions is much larger than that of Ti4+ atoms; a small amount of the rare earth ions after doping are added and then dispersed in a lattice structure of TiO2, which promotes the transformation of the TiO2 crystal form from anatase to rutile; besides, a lattice distortion structure is formed to enable parameters of unitcells to change; and at the same time, the visible light response of the catalyst is promoted and photocatalytic activity under visible light is improved.

Description

technical field [0001] The invention relates to the preparation of a rare earth ion-doped composite photocatalyst corresponding to visible light and the field of visible light photocatalytic oxidation degradation of pollutants in a saline wastewater system, in particular to a rare earth ion-doped TiO with a weak visible light response in an artificial seawater system 2 The preparation method of / reduced graphene composite material. Background technique [0002] The rapid development of land discharge of industrial and agricultural wastewater and shipping demand has brought serious marine environmental pollution problems. The long-term effect of various organic pollutants in the ocean has caused great harm to marine life, and the presence of strong carcinogen polycyclic aromatic hydrocarbons has even been found in deep-sea fish. Different from the traditional wastewater system polluted by organic matter, the concentration of organic pollutants in seawater is very low and inte...

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
IPC IPC(8): B01J23/10B01J37/03B01J37/10C02F1/30C02F1/72C02F101/30C02F101/34
CPCC02F1/30C02F1/725B01J23/10B01J37/033B01J37/10C02F2101/345C02F2101/30B01J35/399B01J35/393B01J35/23B01J35/39
Inventor 王挺李瑶潘家豪李冰蕊吴礼光丁知非
Owner ZHEJIANG GONGSHANG UNIVERSITY
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