Abstract
Silver bromide (AgBr) rods with different polydispersity were first synthesized in situ in oil (dodecane)-in-water emulsion, where AgNO3 was used as the silver ion source and tetradecyl trimethyl ammonium bromide acted as both the bromide ion source as well as the stabilizing agent. Scanning electron microscopy and X-ray diffraction techniques were carried out to characterize their morphologies and crystal structures. A morphology evolution varying with aging time showed that the AgBr rods in oil-in-water emulsion formed from nanoparticles, and the formation process was disclosed by drop-coating initially formed emulsion onto glass substrate and quick solvents evaporation. Besides, in comparison with commercial P25 (anatase 80%, rutile 20%), the as-fabricated AgBr rods presented excellent photocatalytic activities over methyl orange under direct sunlight irradiation, showing their promising potential as efficient sunlight-driven photocatalysts for organic pollutants degradation.
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