TY - JOUR
T1 - Green synthesis of mesoporous hematite (α-Fe2O 3) nanoparticles and their photocatalytic activity
AU - Ahmmad, Bashir
AU - Leonard, Kwati
AU - Shariful Islam, Md
AU - Kurawaki, Junichi
AU - Muruganandham, Manickavachagam
AU - Ohkubo, Takahiro
AU - Kuroda, Yasushige
N1 - Funding Information:
This work was partly supported by Grant-in-Aid for Scientific Research (No. 21020030). One of the authors (B.A.) acknowledges the financial support by the Sasakawa Scientific Research Grant from the Japan Science Society. The authors also wish to thank Mr. Masao Arima of Kagoshima prefecture for providing fresh green tea leaves and Ms. Mika Arima for helping to prepare the green tea extract.
PY - 2013/1
Y1 - 2013/1
N2 - A green synthesis method for the preparation of mesoporous α-Fe 2O3 nanoparticles has been developed using the extract of green tea (camellia sinensis) leaves. This simple and one-step method can suitably be scaled up for large-scale synthesis. The as-prepared mesoporous nanoparticles were characterized by SEM, TEM, XRD, XPS, Raman, UV-visible spectroscopy and N2 adsorption analysis. The nanoparticles were highly pure and well crystallized with an average particle size of 60 nm. The photocatalytic activity of nanoparticles was evaluated by the amount of hydroxyl radical formation under visible light irradiation detected by fluorescence spectroscopy. The as-prepared α-Fe2O3 showed two times higher activity than commercial α-Fe2O3 in term of hydroxyl radical formation and enhanced performance in a photoelectrochemical cell. Also, a plausible mechanism for the formation of mesoporous α-Fe2O3 has been suggested.
AB - A green synthesis method for the preparation of mesoporous α-Fe 2O3 nanoparticles has been developed using the extract of green tea (camellia sinensis) leaves. This simple and one-step method can suitably be scaled up for large-scale synthesis. The as-prepared mesoporous nanoparticles were characterized by SEM, TEM, XRD, XPS, Raman, UV-visible spectroscopy and N2 adsorption analysis. The nanoparticles were highly pure and well crystallized with an average particle size of 60 nm. The photocatalytic activity of nanoparticles was evaluated by the amount of hydroxyl radical formation under visible light irradiation detected by fluorescence spectroscopy. The as-prepared α-Fe2O3 showed two times higher activity than commercial α-Fe2O3 in term of hydroxyl radical formation and enhanced performance in a photoelectrochemical cell. Also, a plausible mechanism for the formation of mesoporous α-Fe2O3 has been suggested.
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U2 - 10.1016/j.apt.2012.04.005
DO - 10.1016/j.apt.2012.04.005
M3 - Article
AN - SCOPUS:84870488447
SN - 0921-8831
VL - 24
SP - 160
EP - 167
JO - Advanced Powder Technology
JF - Advanced Powder Technology
IS - 1
ER -