Abstract
In this study, graphene oxide-doped nano-hydroxyapatite (nHAp@GO) composite was synthesized via a simple in-situ one-pot method and was used as an adsorbent for the removal of toxic diazo dyes, Congo Red (CR) and Trypan Blue (TB), in water. A remarkable adsorption capacity for CR (48.5 mg/g) and TB (41.0 mg/g) were shown on the surface of nHAp@GO (2 g/L), respectively, and was much higher than those of bare nHAp or GO. After doping of GO on nHAp, the specific surface area of nHAp was increased by 2.5 times. The presence of sulphur peak in EDX spectrum and S–O stretching vibration peak in FTIR confirmed the adsorption of dyes on the surface of nHAp@GO composite. After the adsorption process, the shifting of d(100) spacing of nHAp confirmed the loading of bulky organic moieties on nHAp@GO composite. Maximum CR and TB dyes adsorption occurred in a wide range of initial pH between 3.0 and 10.0. The adsorption of both CR and TB dyes are due mainly to the electrostatic interaction, π − π stacking interaction, hydrophobic interaction, and hydrogen bonds between dyes and nHAp@GO composite. The nHAp@GO nanocomposite was recycled up to three times at the sustained efficiency after washing with ethanol solution. We believe that such multifunctional material developed in this study will be effectively used for the depollution of toxic diazo dyes in practical applications.
| Original language | English |
|---|---|
| Pages (from-to) | 746-754 |
| Number of pages | 9 |
| Journal | Journal of Molecular Liquids |
| Volume | 269 |
| DOIs | |
| Publication status | Published - 2018 Nov 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Spectroscopy
- Physical and Theoretical Chemistry
- Materials Chemistry
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Synthesis and characterization of graphene oxide-doped nano-hydroxyapatite and its adsorption performance of toxic diazo dyes from aqueous solution. / Prabhu, Subbaiah Muthu; Khan, Abuzar; Hasmath Farzana, M.; Hwang, Gil Chan; Lee, Woojin; Lee, Giehyeon.
In: Journal of Molecular Liquids, Vol. 269, 01.11.2018, p. 746-754.Research output: Contribution to journal › Article
TY - JOUR
T1 - Synthesis and characterization of graphene oxide-doped nano-hydroxyapatite and its adsorption performance of toxic diazo dyes from aqueous solution
AU - Prabhu, Subbaiah Muthu
AU - Khan, Abuzar
AU - Hasmath Farzana, M.
AU - Hwang, Gil Chan
AU - Lee, Woojin
AU - Lee, Giehyeon
PY - 2018/11/1
Y1 - 2018/11/1
N2 - In this study, graphene oxide-doped nano-hydroxyapatite (nHAp@GO) composite was synthesized via a simple in-situ one-pot method and was used as an adsorbent for the removal of toxic diazo dyes, Congo Red (CR) and Trypan Blue (TB), in water. A remarkable adsorption capacity for CR (48.5 mg/g) and TB (41.0 mg/g) were shown on the surface of nHAp@GO (2 g/L), respectively, and was much higher than those of bare nHAp or GO. After doping of GO on nHAp, the specific surface area of nHAp was increased by 2.5 times. The presence of sulphur peak in EDX spectrum and S–O stretching vibration peak in FTIR confirmed the adsorption of dyes on the surface of nHAp@GO composite. After the adsorption process, the shifting of d(100) spacing of nHAp confirmed the loading of bulky organic moieties on nHAp@GO composite. Maximum CR and TB dyes adsorption occurred in a wide range of initial pH between 3.0 and 10.0. The adsorption of both CR and TB dyes are due mainly to the electrostatic interaction, π − π stacking interaction, hydrophobic interaction, and hydrogen bonds between dyes and nHAp@GO composite. The nHAp@GO nanocomposite was recycled up to three times at the sustained efficiency after washing with ethanol solution. We believe that such multifunctional material developed in this study will be effectively used for the depollution of toxic diazo dyes in practical applications.
AB - In this study, graphene oxide-doped nano-hydroxyapatite (nHAp@GO) composite was synthesized via a simple in-situ one-pot method and was used as an adsorbent for the removal of toxic diazo dyes, Congo Red (CR) and Trypan Blue (TB), in water. A remarkable adsorption capacity for CR (48.5 mg/g) and TB (41.0 mg/g) were shown on the surface of nHAp@GO (2 g/L), respectively, and was much higher than those of bare nHAp or GO. After doping of GO on nHAp, the specific surface area of nHAp was increased by 2.5 times. The presence of sulphur peak in EDX spectrum and S–O stretching vibration peak in FTIR confirmed the adsorption of dyes on the surface of nHAp@GO composite. After the adsorption process, the shifting of d(100) spacing of nHAp confirmed the loading of bulky organic moieties on nHAp@GO composite. Maximum CR and TB dyes adsorption occurred in a wide range of initial pH between 3.0 and 10.0. The adsorption of both CR and TB dyes are due mainly to the electrostatic interaction, π − π stacking interaction, hydrophobic interaction, and hydrogen bonds between dyes and nHAp@GO composite. The nHAp@GO nanocomposite was recycled up to three times at the sustained efficiency after washing with ethanol solution. We believe that such multifunctional material developed in this study will be effectively used for the depollution of toxic diazo dyes in practical applications.
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U2 - 10.1016/j.molliq.2018.08.044
DO - 10.1016/j.molliq.2018.08.044
M3 - Article
VL - 269
SP - 746
EP - 754
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
SN - 0167-7322
ER -