Active Electrochemical Dissolution of Molybdenum and Application for Room‐Temperature Synthesis of Crystallized Luminescent Calcium Molybdate Film

Abstract

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.