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

Fluorescent carbon dot/mesoporous molecular sieve composite luminescent material as well as preparation and application of fluorescent carbon dot/mesoporous molecular sieve composite luminescent material

A technology of mesoporous molecular sieves and fluorescent carbon dots, applied in the fields of luminescent materials, fluorescence/phosphorescence, analytical materials, etc., can solve the problems of production and application limitations, high price of precious metals, and achieve short time consumption, high sensitivity and selectivity, and low cost. Effect

Inactive Publication Date: 2016-07-13
SOUTH CHINA AGRI UNIV
View PDF6 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In previous studies, luminescent complexes of noble metals such as platinum and ruthenium were often used for oxygen sensing, but due to the high price of such noble metals, their practical production and application were greatly limited.

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
  • Fluorescent carbon dot/mesoporous molecular sieve composite luminescent material as well as preparation and application of fluorescent carbon dot/mesoporous molecular sieve composite luminescent material
  • Fluorescent carbon dot/mesoporous molecular sieve composite luminescent material as well as preparation and application of fluorescent carbon dot/mesoporous molecular sieve composite luminescent material
  • Fluorescent carbon dot/mesoporous molecular sieve composite luminescent material as well as preparation and application of fluorescent carbon dot/mesoporous molecular sieve composite luminescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Preparation of carbon dots / MCM-41 composite luminescent material

[0036] (1) Preparation of silane-functionalized fluorescent carbon dots: Add 30mL of silane coupling agent KH-602 into a 100mL three-necked flask, degas with nitrogen for 10 minutes, and heat to 240°C. Quickly add 1.5g of anhydrous citric acid while stirring, take it out after 3 minutes of constant temperature reaction, and cool it down to room temperature naturally. After the crude product is purified three times with petroleum ether, the final silane-functionalized fluorescent carbon quantum dots are obtained;

[0037] (2) Preparation of inorganic carrier mesoporous material MCM-41: can be obtained by referring to literature methods (C.T.Kresge, M.E.Leonowicz, W.J.Roth, J.C.Vartuli, J.S.Beck, Nature, 1992,359,710; J.S.Beck, J.C.Vartuli, W.J.Roth, M.E.Leonowicz, C.T.Kresge, K.D.Schmitt, C.T.-W.Chu, D.H.Olson, E.W.Sheppard, S.B.McCullen, J.B.Higgins, J.L.Schlenker, J.Am.Chem.Soc.1992,114,10834...

Embodiment 2

[0039] Example 2: Preparation of carbon dots / MCM-48 composite luminescent material

[0040] (1) Prepare silane functionalized fluorescent carbon dots by the method of Example 1;

[0041] (2) Preparation of inorganic carrier mesoporous material MCM-48: it can be obtained by referring to literature methods (D.Zhao, Q.Huo, J.Feng, B.F.Chmelka, G.D.Stucky, J.Am.Chem.Soc.1998,120, 6024; J.Xu, Z.H.Luan, L.Kevan, Chem.Mater, 1998, 10, 3690-3698), the specific steps are: according to TEOS: CTAB: NaOH: H 2O=1:0.6:0.47:65 ratio, weigh 10.95g cetyltrimethylammonium bromide (CTAB), dissolve it in 59.1mL deionized water, then add 0.94g NaOH, and maintain the system at 35°C Stir at constant temperature for a period of time to dissolve it, slowly add 9.7mL tetraethyl orthosilicate (TEOS), and continue stirring for 4 to 5 hours. Move it into a polytetrafluoroethylene-lined reactor, crystallize at 100°C for 48h, filter, wash with deionized water, and dry at 60°C for 12h. Put it into a muffl...

Embodiment 3

[0043] Example 3: Preparation of carbon dots / SBA-15 composite luminescent material

[0044] (1) Prepare silane functionalized fluorescent carbon dots by the method of Example 1;

[0045] (2) Preparation of inorganic carrier mesoporous material SBA-15: It can be obtained according to the literature method (B.F.Lei, L.Wang, H.R.Zhang, Y.L.Liu, H.W.Dong, M.T.Zheng, X.H.Zhou, SensActuatorsBChem.2016,10,1016) , the specific steps are: Weigh 6g of P123 into a round bottom flask, add 225mL of a mixture containing 180mL of 2mol / L hydrochloric acid and 45mL of deionized water, stir in a water bath at 35°C until it becomes clear, and add 13.8mL of orthosilicic acid dropwise Ethyl ester, kept stirring at 25°C for 24h. Put it into a polytetrafluoroethylene reactor lined with water heat treatment at 100°C for 48 hours, take it out after cooling, filter it with suction, and wash it repeatedly with deionized water for 5 times and once with ethanol, and dry the obtained powder in an oven at ...

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 belongs to the field of composite luminescent materials and discloses a fluorescent carbon dot / mesoporous molecular sieve composite luminescent material, a preparation method of the composite luminescent material and application of the composite luminescent material in the aspect of oxygen sensing. The preparation method of the composite luminescent material comprises the following steps: (1) preparing silane functionalized fluorescent carbon dots: under a stirring condition, adding anhydrous citric acid into a silane coupling agent and reacting at a constant temperature; purifying to obtain silane functionalized fluorescent quantum dots; (2) preparing the fluorescent carbon dot / mesoporous molecular sieve composite luminescent material: under the condition of taking ethanol as a solvent, taking a mesoporous molecular sieve to react with the silane functionalized fluorescent carbon dots prepared in the step (1) and purifying to obtain the fluorescent carbon dot / mesoporous molecular sieve composite luminescent material. The preparation method is simple, and the raw materials are low in price and have no toxin; the prepared composite luminescent material has high sensitivity and selectivity, stable performance, and quick response, the emission intensity is sensitive to oxygen concentration, and the composite luminescent material is an economical type green and environment-friendly oxygen sensing material.

Description

technical field [0001] The invention belongs to the field of composite luminescent materials, in particular to a fluorescent carbon dot / mesoporous molecular sieve composite luminescent material and its preparation and application in oxygen sensing. Background technique [0002] With the advancement of science and technology, sensing technology has played a key role in various aspects such as environmental protection, national defense construction, and space exploration. Since Freeman et al first developed a chemiluminescent hydrogen peroxide sensor in 1978, optical sensors have attracted more and more attention from analytical chemists. The luminescence intensity, luminescence peak position or excited state lifetime of luminescent chemical sensing materials change with the surrounding chemical environment, so as to realize the sensing and detection of the analyte. Sensing and detection methods based on luminescence do not have the interference of scattered light background ...

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): C09K11/65G01N21/64
CPCC09K11/65G01N21/643G01N2021/6432
Inventor 雷炳富王丽张浩然周晓华刘应亮庄健乐何友玲
Owner SOUTH CHINA AGRI UNIV
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