VGD participated in the PL measurements. JW and SL carried out the XRD, AFM, J-V, and photoresponse measurements. JW, ZMW, SL, JL, and YIM participated in the statistical analysis and drafted the manuscript. JW, ZMW, ESK, and GJS conceived the study and participated in its design and coordination. All authors read and approved the final manuscript.”
“Background Three-dimensional hierarchical architectures, or nanoarchitectures, assembled by one-dimensional (1D) nanostructures have attracted extraordinary attention and intensive interests owing to their unique structures and fantastic properties different from those of the monomorph structures [1–5]. Particularly,
hierarchical architectures with mesoporous structures have triggered more and more research enthusiasm in recent years for their high surface-to-volume ratio and permeability. Synthesis of mesoporous materials has become BTSA1 chemical structure a remarkable level in modern materials chemistry . Mesoporous materials are generally synthesized via a soft- or hard-template-aided process, which usually, however, suffers from the removal of templates and resultant structural collapse, although hydrothermal synthesis or treatment has been extensively investigated
at various stages with the attempt to improve the hydrothermal stability of the as-synthesized mesoporous products. Consequently, great effort has been made to directly grow mesoporous inorganic materials in the absence of any templates in recent years [7, 8]. Most recently, the hydrothermal method has emerged as a thriving technique for the facile fabrication of the nanoarchitectures Cilengitide price [9–12], such as AlOOH cantaloupe , Co(OH)2 and Co3O4 nanocolumns , ZnSe nanoflowers , Ni(OH)2 and NiO microspheres , and even mesoporous SrCO3 microspheres . As the most stable iron oxide, hematite (α-Fe2O3) has drawn much concern owing to its widespread applications as catalysts, pigments, gas sensors , photoelectrodes [17, 18], starting materials for the synthesis of magnetic iron oxide nanoparticles (NPs) , electrode materials for lithium-ion battery (LIB)
[20–26], etc. α-Fe2O3 is considered a promising active lithium intercalation host due to its high theoretical capacity aminophylline (1,007 mAh·g−1), low cost, and environmental friendliness. In contrast to graphite electrodes, the lithium storage within iron oxides is mainly achieved through the reversible conversion reaction between lithium ions and metal nanocrystals dispersed in a Li2O matrix . Such a process usually causes drastic volume changes (>200%) and severe destruction of the electrode upon INK1197 order electrochemical cycling, especially at a high rate . Particle morphology has been recognized as a key factor influencing the electrochemical performance for lithium storage; thus, hematite nanostructures with different morphologies have been synthesized so as to enhance the electrochemical performance .