title: Controlling Heat Release from a Close-Packed Bisazobenzene-Reduced-Graphene-Oxide Assembly Film for High-Energy Solid-State Photothermal Fuels.
abstract: A closed-cycle system for light-harvesting, storage, and heat release is important for utilizing and managing renewable energy. However, combining a high-energy, stable photochromic material with a controllable trigger for solid-state heat release remains a great challenge for developing photothermal fuels (PTFs). This paper presents a uniform PTF film fabricated by the assembly of close-packed bisazobenzene (bisAzo) grafted onto reduced graphene oxide (rGO). The assembled rGO-bisAzo template exhibited a high energy density of 131 Wh kg-1and a long half-life of 37 days owing to inter- or intramolecular H-bonding and steric hindrance. The rGO-bisAzo PTF film released and accumulated heat to realize a maximum temperature difference (DT) of 15 °C and a DT of over 10 °C for 30 min when the temperature difference of the environment was greater than100 °C. Controlling heat release in the solid-state assembly paves the way to develop highly efficient and high-energy PTFs for a multitude of applications.
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R China.
authors.forename: Xiaoze
authors.initials: X
authors.lastname: Zhao
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R China.|Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin, 300072, P. R China.|Tianjin Key Laboratory of Composite and Functional Materials, Tianjin, 300072, P. R China.
authors.forename: Yiyu
authors.initials: Y
authors.lastname: Feng
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R China.
authors.forename: Chengqun
authors.initials: C
authors.lastname: Qin
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R China.
authors.forename: Weixiang
authors.initials: W
authors.lastname: Yang
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R China.
authors.forename: Qianyu
authors.initials: Q
authors.lastname: Si
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P. R China.|Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin, 300072, P. R China.|Tianjin Key Laboratory of Composite and Functional Materials, Tianjin, 300072, P. R China.
authors.forename: Wei
authors.initials: W
authors.lastname: Feng
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D001554:Benzene / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006358:Hot Temperature; D007536:Isomerism; D008958:Models, Molecular; D008968:Molecular Conformation; D010087:Oxides / Q000737:chemistry*; D055668:Photochemical Processes
chemical_list: D001391:Azo Compounds; D010087:Oxides; D006108:Graphite; D001554:Benzene
keywords: graphene oxide; heat release; high energy; photothermal fuels; solid state