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One‐Pot Photoinitiated Synthesis and Phase‐Transfer Separation of Bismuth Nanoparticles
Author(s) -
Brütsch Lennart,
Feldmann Claus
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201700328
Subject(s) - oleylamine , nanoparticle , bismuth , materials science , phase (matter) , transmission electron microscopy , propylene carbonate , heptane , photochemistry , chemical engineering , analytical chemistry (journal) , chemistry , nanotechnology , organic chemistry , electrolyte , electrode , engineering , metallurgy
Bismuth nanoparticles were obtained via sequential photoinitiated synthesis and phase‐transfer separation. Specifically, BiBr 3 was used as a starting material in propylene carbonate (PC) as the polar phase, which was topped by heptane (Hep) as the non‐polar phase containing oleylamine (OA) as the phase‐transfer agent. In a photoreactor set‐up, this two‐phase system was thoroughly mixed and illuminated by broad‐band UV light emitted by a high‐pressure Xe lamp. Upon excitation via the Br→Bi ligand‐to‐metal charge transfer (LMCT), the photoreduction was initiated resulting in Bi 0 nanoparticles that were instantaneously functionalized by oleylamine and transferred to the heptane phase. As a result, Bi 0 nanoparticles with uniform, spherical shape and a diameter of about 5 nm were formed. The as‐prepared nanoparticles are characterized by transmission electron microscopy, X‐ray powder diffraction and infrared spectroscopy.