期刊
JOURNAL OF MOLECULAR AND ENGINEERING MATERIALS
卷 2, 期 1, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S2251237314400024
关键词
Soft-oxometalates; {Mo-132}; keplerates; photocatalysis; photopolymerization; polystyrene latexes
资金
- DST-Fast-track fellowship
- BRNS DAE grant
- IISER-K
In this paper, a green and facile synthetic protocol for the preparation of photoactive gold nanoparticle-soft oxometalates (AuNP-SOM) using a unique keplarate type oxomolybdate cluster viz. {Mo-132}, is reported. The as-synthesized AuNP-SOMs are fully characterized by electronic absorption spectroscopy, Raman spectroscopy and high resolution transmission electron microscopy (HR-TEM). We further demonstrate that by merely tuning the ratio of the precursors in solution it is possible to control the morphology of AuNP-SOM nanostructures. Moreover, these photoactive AuNP-SOMs are employed as photocatalysts for the photopolymerization of styrene to generate colloidal monodisperse polystyrene microspheres in a controllable way in the absence of any external co-initiator or inert atmosphere. Effect of styrene concentration on the size of microspheres is studied using DLS and optical microscopy. Finally, the role of AuNP-SOMs as efficient photocatalyst is established through several control experiments and a reaction pathway is proposed.
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