Open AccessHydrothermal synthesis, characterisation and growth mechanism of Ni(SO 4 ) 0.3 (OH) 1.4 nanowires
Author(s) -
Wang Haoran,
Wan Lei,
Chen Yaqiong,
Hu Wenbin,
Deng Yida
Publication year - 2015
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2015.0152
Subject(s) - nanowire , hydrothermal circulation , hydroxide , amorphous solid , materials science , molar ratio , fabrication , hydrothermal synthesis , phase (matter) , morphology (biology) , chemical engineering , nanotechnology , crystal structure , crystallography , crystal growth , crystal (programming language) , chemistry , catalysis , organic chemistry , geology , medicine , paleontology , programming language , alternative medicine , pathology , computer science , engineering
A report is presented on the facile fabrication of Ni(SO 4 ) 0.3 (OH) 1.4 nanowires via the hydrothermal synthesis method. The outcome demonstrates that the existence of SO 4 2− and a comparatively lower pH are of great essence to form nanowires morphology rather than flake‐like or amorphous ones. When the molar ratio of SO 4 2− to OH − was 1:1, almost pure nanowires of diameter 20−30 nm and several micrometres long could be obtained. Ni(SO 4 ) 0.3 (OH) 1.4 is actually a type of α‐Ni(OH) 2 . The growth mechanism of this hydroxyl‐lacking hydroxide is discussed. The embedded SO 4 2− between Ni(OH) 2 layers can realise electrostatic equilibrium which may ensure an hcp crystal structure of Ni(OH) 2 having the trend to grow along the (001) direction. On the contrary, when SO 4 2− was superseded by other anions, the nanowires would progressively convert to nanosheets, accompanied by an α‐phase to β‐phase transformation.