研究目的
To realize environmentally friendly synthesis of hierarchically porous ZSM-5 zeolite from iron ore tailings (IOTs) using a solvent-free method.
研究成果
Hierarchically porous ZSM-5 was successfully synthesized from IOT without using a solvent, demonstrating well-defined crystallinity and micro-/mesoporous structures. This method is environmentally friendly and sustainable, offering a cost-effective and industrially applicable way for synthesizing micro-/mesoporous zeolites.
研究不足
The study focuses on the synthesis of ZSM-5 from IOTs using a solvent-free method, which may have limitations in terms of scalability and the need for further optimization of synthesis conditions for industrial application.
1：Experimental Design and Method Selection
The study employs a solvent-free method for the synthesis of hierarchically porous ZSM-5 zeolite from IOTs, using 1,6-hexanediamine as a single template via in situ crystallization.
2：Sample Selection and Data Sources
Iron ore tailings (IOTs) were collected from Kuancheng, Chengde (Northeastern China), and processed by grinding, roasting, acid leaching, filtering, and drying before use as material.
3：List of Experimental Equipment and Materials
Materials include sodium aluminate (NaAlO2), sodium hydroxide (NaOH), sodium carbonate decahydrate (Na2CO3·10H2O), and 1,6-hexanediamine (HDA) obtained from Sinopharm Chemical Reagent. Equipment includes an Ultima IV diffractometer, JSM-6701F SEM, TF20 TEM, Nicolet IS10 FTIR spectrometer, and Micromeritics ASAP 2460 for BET surface area analysis.
4：Experimental Procedures and Operational Workflow
Pretreated IOT was mixed with NaAlO2, HDA, and Na2CO3·10H2O in a rotating mortar, then transferred to an autoclave for heating. The solid sample was collected, washed, dried, and calcined.
5：Data Analysis Methods
Characterization techniques included XRD, SEM, TEM, FTIR spectroscopy, and nitrogen adsorption for BET surface area analysis.
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Ultima IV diffractometer
Ultima IV
Rigaku
X-ray diffraction analysis
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JSM-6701F
JSM-6701F
JEOL
Scanning electron microscopy
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TF20
TF20
JEOL
Transmission electron microscopy
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Nicolet IS10
IS10
Thermo Scientific
Fourier transform infrared spectroscopy
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Micromeritics ASAP 2460
ASAP 2460
Micromeritics
Brunauer–Emmett–Teller (BET) surface area analysis
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