研究目的
Investigating the synthesis of silver sulfide (Ag2S) quantum dots (QDs) with near-infrared (NIR) luminescence using a high-gravity coupled liquid–liquid interface reaction technique in a rotating packed bed (RPB) reactor for potential scale-up.
研究成果
The study successfully demonstrates a novel approach for the continuous and ultrafast synthesis of NIR Ag2S QDs using a high-gravity coupled liquid–liquid interface reaction technique in an RPB reactor. The Ag2S QDs exhibit good dispersion in organic solvents and NIR luminescence, making them suitable for various applications. The mechanism of process intensification is attributed to the formation of small and uniform droplets in the RPB reactor.
研究不足
The study focuses on the synthesis of Ag2S QDs using a specific technique and does not explore other methods or materials. The scalability of the process, while suggested, is not fully demonstrated.
1：Experimental Design and Method Selection:
The study employs a high-gravity coupled liquid–liquid interface reaction technique in an RPB reactor for the synthesis of Ag2S QDs. The methodology includes the use of computational fluid dynamics (CFD) simulation and fluorescence imaging to understand the process intensification mechanism.
2：Sample Selection and Data Sources:
Silver acetate (AgAc) and sodium sulfide nonahydrate (Na2S·9H2O) are used as precursors. The products are characterized using TEM, HRTEM, XRD, FTIR, XPS, and PL emission spectra.
3：List of Experimental Equipment and Materials:
RPB reactor, Shimadzu XRD-6000 diffractometer, Hitachi H-7700 TEM, Tecnai G2 F20 S-Twin HRTEM, PerkinElmer GX FTIR spectroscopy system, ESCALAB 250 XPS, Horiba FLS980 spectrometer, PerkinElmer Lambda 950 UV/VIS spectrometer, LEICA SP8 confocal laser scanning microscope.
4：Experimental Procedures and Operational Workflow:
Solutions of silver precursor and sulfur precursor are prepared and pumped into the RPB reactor. The reaction occurs at the liquid–liquid interface, and the products are collected and characterized.
5：Data Analysis Methods:
The size and distribution of Ag2S QDs are analyzed using TEM. The luminescence properties are measured using PL emission spectra. The mechanism of process intensification is studied using CFD simulation and fluorescence imaging.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
Shimadzu XRD-6000 diffractometer
XRD-6000
Shimadzu
Analyzing the crystallization phase of the sample
-
Hitachi H-7700 transmission electron microscopy
H-7700
Hitachi
Investigating the morphology of the samples
-
PerkinElmer GX FTIR spectroscopy system
GX
PerkinElmer
Collecting the FTIR spectra
-
PerkinElmer Lambda 950 UV/VIS spectrometer
Lambda 950
PerkinElmer
Characterizing the absorption of the Ag2S QD dispersion at different wavelengths
-
LEICA SP8 confocal laser scanning microscope
SP8
LEICA
Observing the size and morphology of droplets
-
Tecnai G2 F20 S-Twin HRTEM
G2 F20 S-Twin
Tecnai
Obtaining high-resolution transmission electron microscopy images
-
ESCALAB 250 XPS
250
ESCALAB
Confirming the valence states of silver and sulfur
-
Horiba FLS980 spectrometer
FLS980
Horiba
Measuring the photoluminescence emission spectrum
-
登录查看剩余6件设备及参数对照表
查看全部
