Preparation of N-doped nanoporous carbon from ZIF-8 metal-organic framework via ultrasonic spray pyrolysis

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2024-11-14 DOI:10.1016/j.apt.2024.104727

Masaru Kubo, Akito Kawamoto, Manabu Shimada

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Abstract

N-doped nanoporous carbon (NPC) was synthesized from ZIF-8 metal–organic framework via a one-step ultrasonic spray pyrolysis (USP) process and evaluated as a supercapacitor electrode material. The USP method involves ultrasonic nebulization of a ZIF-8 suspension, formation of agglomerates by preheating the droplets, and carbonizing the agglomerates at 1100 °C to yield USP-NPC. For comparison, conventional ZIF-8-derived NPC (c-NPC) and spray-dried ZIF-8 derived NPC (SD-NPC) were also prepared. USP-NPC consists of spherical dense submicron particles with a BET surface area of 1059 m²/g and high N content (6.4 at%). Electrochemical tests revealed that USP-NPC exhibited superior supercapacitance performance (249.7F/g at 0.5 A/g) and 10000-cycles durability compared to c-NPC and SD-NPC. The enhanced performance of USP-NPC is attributed to its spherical morphology, high surface area, and rich N-doping. This study demonstrates that the USP method is a promising approach for the facile synthesis of high-performance NPC electrode materials for supercapacitor applications.

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通过超声喷雾热解从 ZIF-8 金属有机框架制备掺 N 纳米多孔碳

通过一步式超声喷雾热解（USP）工艺从 ZIF-8 金属有机框架合成了掺杂 N 的纳米多孔碳（NPC），并将其作为超级电容器电极材料进行了评估。USP 方法包括对 ZIF-8 悬浮液进行超声波雾化，通过预热液滴形成团聚体，并在 1100 °C 下对团聚体进行碳化，从而生成 USP-NPC。为了进行比较，还制备了传统的 ZIF-8 衍生 NPC（c-NPC）和喷雾干燥 ZIF-8 衍生 NPC（SD-NPC）。USP-NPC 由球形致密亚微米颗粒组成，BET 表面积为 1059 m2/g，氮含量高（6.4%）。电化学测试表明，与 c-NPC 和 SD-NPC 相比，USP-NPC 表现出更优越的超级电容器性能（0.5 A/g 时为 249.7F/g）和 10000 周期的耐用性。USP-NPC 性能的提高归功于其球形形态、高表面积和丰富的 N 掺杂。这项研究表明，USP 方法是一种用于超级电容器应用的高性能 NPC 电极材料的简便合成方法。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)