Preparation method and application for ternary composite photocatalyst
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A ternary composite, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve problems such as low photocatalytic efficiency
Inactive Publication Date: 2018-08-31
NANJING UNIV
View PDF3 Cites 11 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, TiO 2 There are two major defects: (1) wide bandgap (3.0-3.2eV) TiO 2 The responsive ultraviolet light region only accounts for about 5% of sunlight; (2) The large recombination of electrons an
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0060] The preparation method of this ternary composite photocatalyst comprises the following steps:
[0061] Prepare g-C 3 N 4 catalyst of light:
[0062] Weigh 10g of urea into a crucible, cover the crucible, place it horizontally in a muffle furnace, and calcinate at 600°C for 4 hours. 3 N 4 sample.
Embodiment 2
[0064] The preparation method of this ternary composite photocatalyst comprises the following steps:
[0065] Preparation of single carbon spheres:
[0066] At room temperature, slowly add 4.0 g of ground dextrose monohydrate into 40 mL of ultrapure water, stir well, place it in a 50 mL stainless steel autoclave, heat to 180 ° C for 6 h; After washing with pure water and absolute ethanol for 6 times, vacuum drying at 60°C for 10 hours, the carbon sphere material with uniform size was obtained.
Embodiment 3
[0068] The preparation method of this ternary composite photocatalyst comprises the following steps:
[0069] Preparation of C@TiO 2-x Composite material:
[0070] 1. Preparation of monomeric carbon spheres
[0071] 1. At room temperature, take 4.5g of glucose monohydrate and slowly add it to 45ml of pure water. After fully stirring, place it in a 50mL stainless steel autoclave and heat it to 180°C for 6 hours;
[0072] 2. After the reaction, wash with ultra-pure water and absolute ethanol for 6 times, and vacuum-dry at 60°C for 10 hours to obtain carbon sphere materials with uniform size.
[0073] 2. Preparation of C@TiO 2-x composite material
[0074] 1. Take 0.2g of carbon spheres and add them to a mixed solution of 35mL of absolute ethanol and 0.1mL of ultrapure water, and sonicate for 0.5h to obtain dispersion A;
[0075] 2. Take 2mL of tetrabutyl titanate and slowly add it into 40mL of absolute ethanol, stir and mix well to obtain dispersion B;
[0076] 3. Slowly d...
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
Login to view more
Abstract
The invention provides a preparation method for a ternary composite photocatalyst. The method comprises the following steps: slowly adding carbon spheres into an aqueous solution containing absolute ethanol, and performing stirring to obtain a dispersion liquid A; slowly adding tetrabutyl titanate into anhydrous ethanol, performing full stirring to obtain a dispersion liquid B; slowly adding the dispersion liquid B into the dispersion liquid A, and uniformly depositing a layer of reduction type TiO2-x on the surfaces of the carbon spheres through a solvothermal method to obtain a C@TiO2-x composite material; dispersing g-C3N4 into pure water to obtain a mixed liquid F; and dispersing the C@TiO2-x composite material into the mixed liquid F, and performing hydrothermal synthesis to obtain the ternary C@TiO2-x/g-C3N4 heterojunction material. According to the method provided by the invention, the ternary composite photocatalyst prepared by the method is a ternary heterojunction material, can be used for degrading medical wastewater such as 2,4,6-trichlorophenol under visible light and preparing hydrogen by photolysis of water, and has good photocatalytic performance.
Description
technical field [0001] The invention belongs to the technical field of nanomaterial synthesis and relates to a preparation method of a visible light responsive C@TiO2-x / g-C3N4 heterojunction material, in particular to a preparation method and application of a ternary composite photocatalyst. Background technique [0002] With the rapid development of industrialization, energy shortage and environmental pollution have become two key issues that threaten human society and life on earth. Based on the unique properties of solar energy conversion and pollutant removal, photocatalytic technology is regarded as an important strategy for environmental governance and clean energy regeneration. The highly promising semiconductor anatase titanium dioxide (TiO 2 ), have been widely used in the fields of hydrogen production, photocatalysis, and optoelectronics due to low cost, good chemical stability, and no pollution. However, TiO 2 There are two major defects: (1) wide bandgap (3.0-...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more