Kirigami-inspired synthesis of functional mesoporous nanospheres through spray drying of holey nanosheets. (30th June 2021)

• Record Type: Journal Article
• Authors: Zhang, Jingyi; Fu, Benwei; Song, Chengyi; Shang, Wen; Tao, Peng; Deng, Tao
• Is Part Of: Carbon. Volume 178(2021)
• Page Start: 382
• Page End: 390
• Publication Date: 2021-06-30
• Subjects: Kirigami -- Mesoporous spherical graphene oxide -- Holey graphene oxide -- Adsorption; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2021.02.101
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Mesoporous graphene and other carbon derivative nanospheres have attracted intensive research attention owing to their many unique characteristics and fascinating properties. However, facile synthesis of these mesoporous nanospheres with a small particle size and controllable morphology is still a grand challenge. Herein, we report a Kirigami-inspired approach to prepare mesoporous spherical graphene oxide (MSGO) particles through spray drying of holey GO sheets. By increasing pore size and porosity of the holey GO sheets, the spray-dried particles underwent the transition from rough crumpled structure to smooth spherical shape. The prepared MSGO particles have tunable diameters smaller than 200 nm and a high specific surface area of 503 m 2 /g, which enable consistent high-efficiency physical adsorption removal of organic dyes such as Rhodamine B from polluted water with a high adsorption rate of 335.6 mg/(g min). Moreover, the reported synthetic route provides the freedom to easily incorporate other functional nanoparticles such as TiO2, CuO or post-dope MSGO with nitrogen elements for construction of multifunctional composite particles with tailorable structures, which may enable a broad range of promising applications. Graphical abstract: Image 1 Highlights: MSGO nanoparticles are synthesized by spray drying holey graphene oxide sheets. Pore size, porosity, particle size and specific surface area of MSGO particles can be tuned. High-capacity fast adsorption removal of Rhodamine B by MSGO particles is demonstrated. Easy integration of other functional materials into MSGO particles is demonstrated.