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Active Electrochemical Dissolution of Molybdenum and Application for Room‐Temperature Synthesis of Crystallized Luminescent Calcium Molybdate Film
Author(s) -
Cho WooSeok,
Yashima Masatomo,
Kakihana Masato,
Kudo Akihiko,
Sakata Tadayoshi,
Yoshimura Masahiro
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb02895.x
Subject(s) - molybdate , molybdenum , dissolution , luminescence , electrochemistry , inorganic chemistry , calcium , substrate (aquarium) , chemistry , materials science , ion , nuclear chemistry , electrode , metallurgy , organic chemistry , oceanography , optoelectronics , geology
Crystallized luminescent calcium molybdate (CaMoO 4 ) film has been prepared on a molybdenum substrate in an alkaline solution containing calcium ions by active electrochemical dissolution of molybdenum at room temperature (25°C). The dissolution rate became faster with an increase of pH value. A high concentration of calcium (0.02M) and a high pH value (13) favored the reaction of film formation. The film showed only a single green emission at 536 nm with the excitation of 285 nm at liquid‐nitrogen temperature (‐196°C), strongly suggesting that it consisted of well‐crystallized defect‐free crystals.