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Hydrothermal Synthesis and Phase‐, Morphology‐Evolution Mechanism of Lead Titanate Nanostructures Assisted with Tetramethylammonium Hydroxide
Author(s) -
Bao Liang,
He Junhao,
Xu Gang,
Zhao Yangang,
Yang Xin,
Shen Ge,
Han Gaorong
Publication year - 2017
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201600936
Subject(s) - chemistry , tetramethylammonium hydroxide , tetramethylammonium , hydrothermal circulation , hydroxide , morphology (biology) , hydrothermal synthesis , phase (matter) , chemical engineering , mechanism (biology) , lead (geology) , titanate , nanostructure , nanotechnology , inorganic chemistry , organic chemistry , ion , ceramic , materials science , engineering , philosophy , epistemology , geomorphology , biology , genetics , geology
Lead titanate nanostructures with different phases and morphologies, layered hexagonal PbTiO 2 (CO 3 ) 0.3 ‐ (NO 3 ) 0.35 (OH) nanosheets, pyrochlore Pb 2 Ti 2 O 6 nanodendites, pre‐perovskite PbTiO 3 nanofibres and perovskite PbTiO 3 nanoplates, have been synthesized via a conventional hydrothermal route assisted with different concentrations of tetramethylammonium hydroxide (TMAH). X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high‐resolution TEM (HRTEM) were employed to characterize the phase, morphology and growth behavior of the synthesized samples. The results reveal that at low TMAH concentration the obtained samples are mainly of PbTiO 2 (CO 3 ) 0.3 (NO 3 ) 0.35 (OH) nanosheets. With the TMAH concentration increasing, the obtained samples change to pyrochlore Pb 2 Ti 2 O 6 nanodendites, pre‐perovskite PbTiO 3 nanofibres and perovskite PbTiO 3 nanoplates in turn. With the basis of the experimental results, the phase‐ and morphology‐evolution mechanism of the lead titanate nanostructures is discussed by combining the analysis of the lattice structure feature and the properties of TMAH.