研究目的
To study the synergistic effects between metal oxides (MnO2 and Fe2O3) and graphene on far-infrared (FIR) emission performance for potential applications in medical care products.
研究成果
The study successfully demonstrated that metal oxides/graphene composites, specifically MnO2/GNPs and Fe2O3/GNPs, exhibit enhanced FIR emission properties due to synergistic effects. The MnO2/GNPs (2%) composite showed a super high FIR emissivity of 0.981, and Fe2O3/GNPs (1%) reached up to 0.953, indicating their promising application in high FIR emission materials for medical care.
研究不足
The study primarily focuses on the FIR emission performance of MnO2/GNPs and Fe2O3/GNPs composites, with limited exploration into the underlying mechanisms of the synergistic effects, especially for the Fe2O3/GNPs system.
1：Experimental Design and Method Selection:
The study involved the synthesis of MnO2/graphene nanoplate (GNPs) and Fe2O3/GNPs composites via in situ hydrothermal process to investigate their FIR emission properties.
2：Sample Selection and Data Sources:
GNPs (KNG-G5) was supplied by Xiamen Knano Graphene Technology Co., Ltd. KMnO4, H2SO4, H2O2, and FeCl3·6H2O were purchased from chemical reagent suppliers.
3：List of Experimental Equipment and Materials:
Field-emission scanning electron microscopy (SEM, NJSM-6700F, JEOL, Japan), transmission electron microscope (TEM, JEOL-2100F, Japan), powder XRD system (D8-Advance, Bruker, Germany), Raman spectrometer (Raman, LABRAM, HJY, France), dual-band emissivity meter (IR-2, Shanghai Chengbo Optoelectronic Technology, China), and Brunauer–Emmett–Teller (BET) method via nitrogen adsorption–desorption measurements using a NOVA 2000e analyzer (Quantachrome, USA).
4：Experimental Procedures and Operational Workflow:
GNPs/MnO2 and GNPs/Fe2O3 composites were synthesized via hydrothermal process, followed by characterization using SEM, TEM, XRD, Raman spectroscopy, and FIR emissivity measurements.
5：Data Analysis Methods:
The FIR emissivity was measured and compared between composites and pristine materials. The specific surface area, pore volume, and pore size were analyzed to understand the morphological effects on FIR emission.
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Transmission electron microscope
JEOL-2100F
JEOL, Japan
Used to observe the micro morphology of the as-prepared materials.
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Powder XRD system
D8-Advance
Bruker, Germany
Used to determine the crystallographic structures of the materials.
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Field-emission scanning electron microscopy
NJSM-6700F
JEOL, Japan
Used to observe the micro morphology of the as-prepared materials.
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GNPs
KNG-G5
Xiamen Knano Graphene Technology Co., Ltd
Used as a base material for synthesizing composites with metal oxides to enhance FIR emission performance.
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Raman spectrometer
LABRAM
HJY, France
Used to record Raman spectra of the materials.
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Dual-band emissivity meter
IR-2
Shanghai Chengbo Optoelectronic Technology, China
Used to measure FIR emissivity of the materials.
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Brunauer–Emmett–Teller (BET) analyzer
NOVA 2000e
Quantachrome, USA
Used to measure the specific surface area, pore volume, and pore size of the materials via nitrogen adsorption–desorption measurements.
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