研究目的
To prepare low-cost and high-efficiency photothermal materials for solar vapor generation by controlled carbonization of waste polypropylene.
研究成果
The controlled carbonization of PP by using NiO and PIL-X as combined catalysts has been proposed to prepare Ni/CNM. Ni/CNM-I exhibits a high evaporation rate of 1.67 kg m?2 h?1 and a solar-to-vapor conversion efficiency up to 94.9%, prevailing over the-state-of-art carbon-based photothermal materials. This work contributes to the field of seawater desalination and proposes a new sustainable approach to convert waste polymers into high value-added carbon nanomaterials.
研究不足
The study focuses on the controlled carbonization of PP and the application of Ni/CNM in solar vapor generation. The scalability and long-term stability of the process in industrial applications are not extensively discussed.
1：Experimental Design and Method Selection:
Controlled carbonization of polypropylene (PP) using NiO and poly(ionic liquid) (PIL) as combined catalysts to prepare Ni/carbon nanomaterial (Ni/CNM).
2：Sample Selection and Data Sources:
Waste PP cups collected from a local restaurant in Wuhan.
3：List of Experimental Equipment and Materials:
PP pellets, NiO nanoparticles, PIL, ethanol, methylene blue, Rhodamine B, dimethylpolysiloxane, and hydrochloride acid.
4：Experimental Procedures and Operational Workflow:
Mixing PP with NiO and PIL, heating the mixture in a crucible at 750°C for 8 min, and characterization of the resultant Ni/CNM.
5：Data Analysis Methods:
Characterization by SEM, TEM, HRTEM, XRD, Raman spectroscopy, TGA, N2 adsorption/desorption measurement, UV-Vis-NIR spectrophotometer, and thermal conductivity Instrument.
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field-emission scanning electron microscope
S4800ESEM-FEG
Observation of the morphology of Ni/CNM
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energy dispersive X-ray spectrometer
Genesis 2000
Analysis of the surface element distribution
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transmission electron microscope
Tecnai G2 F30
Investigation of the microstructure of Ni/CNM
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high-resolution TEM
Tecnai G2 F30
High-resolution observation of the microstructure of Ni/CNM
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surface area analyzer
Micromeritics ASAP 2460
Measurement of the textural structure of Ni/CNM based on N2 adsorption/desorption isotherms
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confocal Raman microscope
inVia Reflex
Collection of Raman spectrum
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X-ray diffraction
SmartLab-SE
Analysis of the phase structure of Ni/CNM
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Elemental Analyzer
Vario EL III
Determination of the element content of Ni/CNM
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X-ray photoelectron spectroscopy
VG ESCALAB MK II spectrometer
Characterization of the surface element composition of Ni/CNM
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thermogravimetric analysis
TA Instruments SDT Q600
Measurement of the thermal stability of Ni/CNM
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Fourier transform infrared spectroscopy
BRUKER Vertex 80 FT-IR
Characterization of the functional group of Ni/CNM
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UV-Vis-NIR spectrophotometer
Lambda 750 S
Testing of the absorption spectrum of Ni/CNM
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thermal conductivity Instrument
Hot Disk, TPS 2500
Measurement of the thermal conductivity of Ni/CNM-I
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micro optical contact angle measurement
Dataphysics OCA15EC
Measurement of water contact angle
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solar light simulator
CEL-S500L
Carrying out the vapor generation experiment
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infrared thermal imaging camera
DM-I220
Monitoring the surface temperature of water and membrane
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electronic balance
JA2003
Measurement of the mass change of water
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UV-6100 spectrometer
UV-6100
Recording UV-Vis absorption spectra of the dye-containing water and the condensed water
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inductively coupled plasma-optical emission spectrometry
JY 200-2
Determination of the metallic ion concentrations of the seawater and the condensed water
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optical microscope
Mshot, MS60
Observation of the optical images of the oil/water emulsion and the condensed water
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