High yield synthesis of intrinsic, doped and composites of nano-zinc oxide using novel combinatorial method |
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Authors: | Singh Nahar Rashmi Ahuja Tarushee Singh Sukhvir Pasricha Renu Haranath D |
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Institution: | CSIR-National Physical Laboratory, Dr K S Krishnan Marg, New Delhi, India. nahar67@yahoo.com |
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Abstract: | A novel synthesis of the production of luminescent zinc oxide (ZnO), either in its intrinsic, metal, non-metal-doped or composite forms with high yield has been developed by parallel iterative techniques, within a combinatorial library prepared by the reduction of nitroarenes. The reduction of nitroarenes by aluminium/zinc dusts in alkaline medium (pH 10±2) forms azoxy compounds, whereas in acidic medium (pH 4.9±0.2) forms phenyl hydroxylamine and zinc/aluminium dust gets oxidised into respective hydroxide. Here, we demonstrate the reduction of nitroarenes at neutral pH (7.0±0.2), which forms intrinsic as well as doped ZnO at 50±5°C using zinc dust alone or mixtures of salts of several transition and non-transition metals in presence of 1:10 ratio of solvent and water. Interestingly, it is observed that the photoluminescence emission could be tuned in a wide range from 390 to 615 nm useful for many display related devices. |
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