Abstract
HgS nanoparticles have been successfully prepared by a hydrothermal method using polyethylene glycol (PEG) as stabilizing agent and characterized by a variety of methods. Our experiments confirmed that the size of the HgS nanocrystals could be easily modified by tuning the chain length of PEG. X-ray powder diffraction (XRD) results for the nanoparticles revealed the hexagonal structure of the HgS, i.e. α-phase known as cinnabar. Morphological studies performed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the synthesized nanocrystals were nanoparticles. Furthermore, a rational mechanism of the formation and evolution of the products was proposed. The optical properties of HgS were investigated by diffuse reflectance spectroscopy (DRS), which indicated that the band gap of the nanoparticles is slightly decreased from 2.05 to 2.00 eV as the average particle size decreases from 55 to 35 nm. Furthermore, the photocatalytic activity studies of the particles demonstrated their excellent photocatalytic performance in rapidly degrading aqueous methylene blue dye solution under visible light irradiation. These results suggest that HgS nanoparticles will be an interesting candidate of photocatalyst working in visible light range. This journal is
| Original language | English |
|---|---|
| Pages (from-to) | 15371-15376 |
| Number of pages | 6 |
| Journal | RSC Advances |
| Volume | 4 |
| Issue number | 30 |
| DOIs | |
| Publication status | Published - 2014 |
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ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemistry(all)
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A simple hydrothermal route for the preparation of HgS nanoparticles and their photocatalytic activities. / Selvaraj, Rengaraj; Qi, Kezhen; Al-Kindy, Salma M Z; Sillanpää, Mika; Kim, Younghun; Tai, Cheuk Wai.
In: RSC Advances, Vol. 4, No. 30, 2014, p. 15371-15376.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A simple hydrothermal route for the preparation of HgS nanoparticles and their photocatalytic activities
AU - Selvaraj, Rengaraj
AU - Qi, Kezhen
AU - Al-Kindy, Salma M Z
AU - Sillanpää, Mika
AU - Kim, Younghun
AU - Tai, Cheuk Wai
PY - 2014
Y1 - 2014
N2 - HgS nanoparticles have been successfully prepared by a hydrothermal method using polyethylene glycol (PEG) as stabilizing agent and characterized by a variety of methods. Our experiments confirmed that the size of the HgS nanocrystals could be easily modified by tuning the chain length of PEG. X-ray powder diffraction (XRD) results for the nanoparticles revealed the hexagonal structure of the HgS, i.e. α-phase known as cinnabar. Morphological studies performed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the synthesized nanocrystals were nanoparticles. Furthermore, a rational mechanism of the formation and evolution of the products was proposed. The optical properties of HgS were investigated by diffuse reflectance spectroscopy (DRS), which indicated that the band gap of the nanoparticles is slightly decreased from 2.05 to 2.00 eV as the average particle size decreases from 55 to 35 nm. Furthermore, the photocatalytic activity studies of the particles demonstrated their excellent photocatalytic performance in rapidly degrading aqueous methylene blue dye solution under visible light irradiation. These results suggest that HgS nanoparticles will be an interesting candidate of photocatalyst working in visible light range. This journal is
AB - HgS nanoparticles have been successfully prepared by a hydrothermal method using polyethylene glycol (PEG) as stabilizing agent and characterized by a variety of methods. Our experiments confirmed that the size of the HgS nanocrystals could be easily modified by tuning the chain length of PEG. X-ray powder diffraction (XRD) results for the nanoparticles revealed the hexagonal structure of the HgS, i.e. α-phase known as cinnabar. Morphological studies performed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the synthesized nanocrystals were nanoparticles. Furthermore, a rational mechanism of the formation and evolution of the products was proposed. The optical properties of HgS were investigated by diffuse reflectance spectroscopy (DRS), which indicated that the band gap of the nanoparticles is slightly decreased from 2.05 to 2.00 eV as the average particle size decreases from 55 to 35 nm. Furthermore, the photocatalytic activity studies of the particles demonstrated their excellent photocatalytic performance in rapidly degrading aqueous methylene blue dye solution under visible light irradiation. These results suggest that HgS nanoparticles will be an interesting candidate of photocatalyst working in visible light range. This journal is
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U2 - 10.1039/c4ra00483c
DO - 10.1039/c4ra00483c
M3 - Article
VL - 4
SP - 15371
EP - 15376
JO - RSC Advances
JF - RSC Advances
SN - 2046-2069
IS - 30
ER -