Surfactant-Assisted Hydrothermal Synthesis, Physical Characterization, and Photoluminescence of PbWO4

Large-scale selective synthesis Of uniform microcrystals lead tungstate (PbWO4) with controlled morphologies has been achieved via a facile surfactant-assisted hydrothermal process. The formation of PbWO4 crystal is strongly dependent on its reaction parameters. The variation of different types of surfactants (such as P123, cetyltrimethyl ammonium bromide (CTAB), poly (vinyl pyrrolidone) (PVP), and dodecyl benzene sulfonic acid sodium salt (SDBS), respectively), reaction temperature, and reaction time are found to play a crucial role in controlling the particle size and morphology of the products. The growth process has been investigated by carefully following time-dependent experiments, and the oriented attachment process has been proposed for the possible formation mechanism. The optical properties, such as UV-vis spectra and PL spectra of PbWO4 crystals, were studied and the room-temperature photoluminescence of PbWO4 samples with different morphologies was investigated.