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Optimizing the Micro/Mesoporous Structure of Hierarchical Porous Carbon Synthesized from Petroleum Pitch Using the
Guan-Wen Liu1, Chen-Shiuan Fan2, Chun-Han Hsu3
1Department of Chemistry, National Cheng Kung University, No.1, University Road, Tainan701, Taiwan.
ACS Omega
|January 2, 2023
Summary
This study developed hierarchical porous carbons (HPCs) using a solvent-free ZnO-template method. HPC-2 demonstrated excellent performance for rapid deionization, showing high electrosorption capacity for sodium and chloride ions.
Area of Science:
- Materials Science
- Environmental Science
- Electrochemistry
Background:
- Hierarchical porous carbons (HPCs) are crucial for water treatment technologies.
- Controlling pore structure is key to enhancing material performance.
- Petroleum industrial-residual pitch offers a sustainable carbon source.
Purpose of the Study:
- To synthesize novel HPCs using a solvent-free ZnO-template method.
- To investigate the influence of ZnO content on pore structure and properties.
- To evaluate the capacitive deionization performance of synthesized HPCs.
Main Methods:
- Solvent-free pyrolysis of petroleum industrial-residual pitch with varying amounts of ZnO.
- Characterization of pore structure (micro-, meso-, macropores), surface area, and tap density.
- Testing of capacitive deionization performance for sodium and chloride ions in NaCl solution.
Main Results:
- ZnO content precisely controlled the micro/meso/macroporous structure of HPCs.
- Surface area ranged from 1141 to 1469 m² g⁻¹, with pore size increasing from 2.4 to 3.7 nm.
- HPC-2 achieved the highest electrosorption capacity (9.94 mg g⁻¹ in 10 min, 10.62 mg g⁻¹ max).
Conclusions:
- The ZnO-template method enables tailored synthesis of HPCs for specific applications.
- HPC-2 exhibits superior performance for rapid capacitive deionization.
- These findings highlight HPC-2 as a promising electrode material for efficient water purification.
