title: Spinous TiO₂ and Au@TiO₂ octahedral nanocages: amorphisity-to-crystallinity transition-driven surface structural construction and photocatalytic study.
abstract: Novel spinous TiO2 and Au@TiO2 octahedral nanocages have been prepared through a well-designed three-step strategy including templated TiO2 wet coating, subsequent structural ripening and final template removal or transformation. The strategy is built on an amorphisity-to-crystallinity transition-driven surface structural construction, which emphasizes the critical steps of crystallization-controlled TiO2 coating and consequent structural ripening. The influence of some key parameters, such as coating temperature, ripening temperature and ripening time, on the structure and morphology of the spinous TiO2 and Au@TiO2 nanocages have been investigated. In addition, in photocatalytic measurements, the prepared spinous TiO2-based nanocages exhibit enhanced photocatalytic efficiency relative to spinousless TiO2-based nanocages as well as P-25, owing to their structure advantages resulting from spinous surfaces. The photocatalytic activity of these TiO2 based photocatalysts has been systematically studied through the corresponding ·OH radical measurements. The synthetic strategy may work as a general method, through similarly designing, to realize surface structure engineering for various materials such as metals, hydroxide and other oxides besides TiO2.
authors.affiliation: Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People's Republic of China.
authors.forename: Lianhai
authors.initials: L
authors.lastname: Zu
authors.affiliation: Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People's Republic of China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Jin
authors.affiliation: Research Center for Translational Medicine & Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, No. 150 Jimo Road, Shanghai 200120, People's Republic of China. Electronic address: lilyqin@tongji.edu.cn.
authors.forename: Yao
authors.initials: Y
authors.lastname: Qin
authors.affiliation: Research Center for Translational Medicine & Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, No. 150 Jimo Road, Shanghai 200120, People's Republic of China; Materials Science and Engineering Program, Department of Mechanical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0072, United States.
authors.forename: Donglu
authors.initials: D
authors.lastname: Shi
authors.affiliation: Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People's Republic of China; Research Center for Translational Medicine & Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, No. 150 Jimo Road, Shanghai 200120, People's Republic of China. Electronic address: yangjinhu2010@gmail.com.
authors.forename: Jinhu
authors.initials: J
authors.lastname: Yang
mesh_terms: D002384:Catalysis; D003460:Crystallization; D006046:Gold / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008968:Molecular Conformation; D049329:Nanostructures; D055668:Photochemical Processes; D013052:Spectrometry, X-Ray Emission; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: C009495:titanium dioxide; D006046:Gold; D014025:Titanium
keywords: Hollow structures; Octahedral nanocages; Photocatalysis; Surface engineering; TiO(2)