Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A photocatalyst and catalyst technology, applied in the chemical industry, can solve the problems of different reduction rates, inability to be widely used, unsatisfactory catalytic activity of bimetallic nanoparticles, etc., and achieve good application prospects
Inactive Publication Date: 2017-08-01
NANCHANG INST OF TECH
View PDF1 Cites 4 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
At present, the research on the preparation of monometallic nanoparticles by phytoreduction has been relatively mature, but the reduction rate of different metal nanoparticles by plant extracts is different. Researchers generally believe that it is difficult to prepare bimetallic nanoparticles by phytoreduction, and because Adsorption of plant molecules, catalytic activity of bimetallic nanoparticles is
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
[0034] Embodiment 1, the preparation method of the present embodiment is:
[0035] Configuration of Cinnamomum camphora leaf extract: Weigh 2.0 g of Cinnamomum camphora leaf powder into a 250 mL Erlenmeyer flask, add 100 mL of deionized water, shake in a shaker (30°C, 150 rpm) for 4 hours, filter to obtain the filtrate, That is 20 g / L of cinnamon camphor leaf extract;
[0036] Take 20 mL of the Cinnamomum camphora leaf extract in a 50 mL Erlenmeyer flask, add 0.1 mL of 100 mmol / L silver nitrate solution to it, stir magnetically, react at 30°C for 24 h, then add 0.2 mL of 50 mmol / L chlorine Auric acid solution, magnetically stirred, and reacted for 4 hours at 30°C to obtain gold-silver bimetallic nanoparticles, such as figure 1 ;
[0037] Add 0.5 g TiO to the gold-silver bimetallic nanosol 2 powder (anatase, 100nm), magnetically stirred for 2 h, filtered to get filter cake and dissolved in 20 mL deionized water, added 0.1 mL ionic liquid [BMIM][BF 4 ], magnetically stirred ...
Embodiment 2
[0039] Embodiment 2, the preparation method of the present embodiment is:
[0040] Get catalyst (d) 0.3 g obtained in example 1 and mix with 300 mL methylene blue solution, magnetically stir, every 2 min or 5min take a sample, scan on UV-Vis spectrophotometer, scan wavelength is 300-900 nm, degradation effect is as follows Figure 4 a, The degradation rate of methylene blue reaches 98% in 35 min.
Embodiment 3
[0041] Embodiment 3, the preparation method of the present embodiment is:
[0042] Get catalyst (d) 0.3 g obtained in Example 1 and mix with 300 mL rhodamine B solution, magnetically stir, take a sample every 2 min or 5 min, scan on the UV-Vis spectrophotometer, the scan wavelength is 300-900 nm, the degradation effect Such as Figure 4 b, The degradation rate of rhodamine B reaches 96% in 20 min.
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
Property
Measurement
Unit
Particle size
aaaaa
aaaaa
Login to view more
Abstract
The invention provides a preparation method of a photocatalyst. The method comprises the following steps that cinnamomum camphora leaves are washed, dried and pulverized into powder; the powder smaller than 200 meshes is taken for later use; plant leaf powder is added into water; oscillation is performed in a shaking table; filtering is performed to obtain plant extracting liquid; a silver nitrate water solution and a chloroauric acid water solution are prepared; gold and silver bi-metal nanoparticles are prepared by mainly using the cinnamomum camphora leaf extracting liquid as a protection agent and a reducing agent; the bi-metal nanoparticles are prepared by a substitution method and a coreduction method at normal temperature; the nanoparticles are loaded on a titanium dioxide carrier for degrading dye such as methyl orange, methylene blue and rhodamine B; the condition that the dye is basically and completely degraded within 1h is found. When the catalyst is subjected to ionic liquid extraction and roasting treatment, the catalytic activity can be shortened within 30 minutes, and is superior to the results reported in most literatures. In addition, the photocatalyst is sunk at the bottom of a container after being used; through simple solid-liquid separation and roasting treatment, the activity is not obviously lowered; good application prospects are realized.
Description
technical field [0001] The invention relates to the technical field of chemical industry, in particular to a "green" preparation method of photocatalyst, which includes the preparation of bimetallic nanoparticles by plant reduction method and the preparation and pretreatment of bimetallic nanoparticle catalysts. Background technique [0002] Au-Ag bimetallic nanoparticles have unique catalytic properties, so their preparation has attracted the attention of many scientists. The addition of Ag to the bimetallic catalyst can promote the O 2 This is because the formation of the bimetallic structure promotes Au and Ag to have greater electron-donating capabilities, and the electrons can be transferred to oxygen molecules, weakening the oxygen-oxygen bond to form O 2 - , to promote the oxidation performance of the catalyst, and at the same time, the interaction of Au and Ag generated by the addition of Ag can prevent the agglomeration of the catalyst during pretreatment. At pre...
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