Salt-Assisted Synthesis of Rod-Like Bi<sub>2</sub>S<sub>3</sub> Single Crystals for Gas-Phase Elemental Mercury Removal
Jiang Wu, Lingtao Yang, Tao Jia, Dongjing Liu
Abstract
Here, rod-like Bi2S3 single crystals are facilely obtained via a low-temperature molten salt (KSCN) method and employed for capturing Hg0. The annealing temperature and salt dosage both affect the structures and performances of Bi2S3. The Hg0 capture ability of Bi2S3 both first increases and then declines with the augmented annealing temperature and salt dosage. The optimal Hg0 removal performance is reached over Bi2S3-300K20 synthesized at 300 °C with usage of 20 g of KSCN. It performs well within 100–260 °C as a result of the higher binding energy of Bi3+ species and one-dimensional rod-like structures with ample exposed adsorption sites. SO2 and NO show almost no impacts on mercury removal performance.