TY - JOUR
T1 - Photocatalytic performance of Cu-doped TiO 2 nanofibers treated by the hydrothermal synthesis and air-thermal treatment
AU - Wu, Ming Chung
AU - Wu, Po Yeh
AU - Lin, Ting-Han
AU - Lin, Tz Feng
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - Series of transition metal-doped TiO 2 (metal/TiO 2 ) is prepared by combining the hydrothermal synthesis and air-thermal treatment without any reduction process. The selected transition metal precursors, including Ag, Au, Co, Cr, Cu, Fe, Ni, Pd, Pt, Y, and Zn, were individually doped into TiO 2 nanofibers to evaluate the photocatalytic degradation activity and photocatalytic hydrogen generation. Consider the photocatalytic performance of these synthesized metal/TiO 2 under UV-A irradiation, copper doped TiO 2 nanofibers (Cu/TiO 2 NFs) was chosen for further study due to its extraordinary reactivity. Systematical studies were spread to optimize the doping concentration and the calcination condition for much higher photocatalytic activity Cu/TiO 2 NFs. In the photocatalytic degradation test, 0.5 mol%-Cu/TiO 2 NFs calcined at 650 °C exhibits the highest activity, which is even higher than commercial TiO 2 -AEROXIDE ® TiO 2 P25 under UV-A irradiation. The synthesized 0.5 mol%-Cu/TiO 2 -650 NFs also have the capability in the photocatalytic hydrogen production. The hydrogen evolution rates are 200 μmol/g·h under UV-A irradiation and 280 μmol/g·h under UV-B irradiation. The density of state calculated by CASTEP for Cu/TiO 2 indicates that Cu doping contributes to the states near valence band edge and narrows the band gap. The disclosed process in this study is industrial safe, convenient and cost-effective. We further produce a significant amount of TiO 2 -based catalysts without any hydrogen reduction treatment.
AB - Series of transition metal-doped TiO 2 (metal/TiO 2 ) is prepared by combining the hydrothermal synthesis and air-thermal treatment without any reduction process. The selected transition metal precursors, including Ag, Au, Co, Cr, Cu, Fe, Ni, Pd, Pt, Y, and Zn, were individually doped into TiO 2 nanofibers to evaluate the photocatalytic degradation activity and photocatalytic hydrogen generation. Consider the photocatalytic performance of these synthesized metal/TiO 2 under UV-A irradiation, copper doped TiO 2 nanofibers (Cu/TiO 2 NFs) was chosen for further study due to its extraordinary reactivity. Systematical studies were spread to optimize the doping concentration and the calcination condition for much higher photocatalytic activity Cu/TiO 2 NFs. In the photocatalytic degradation test, 0.5 mol%-Cu/TiO 2 NFs calcined at 650 °C exhibits the highest activity, which is even higher than commercial TiO 2 -AEROXIDE ® TiO 2 P25 under UV-A irradiation. The synthesized 0.5 mol%-Cu/TiO 2 -650 NFs also have the capability in the photocatalytic hydrogen production. The hydrogen evolution rates are 200 μmol/g·h under UV-A irradiation and 280 μmol/g·h under UV-B irradiation. The density of state calculated by CASTEP for Cu/TiO 2 indicates that Cu doping contributes to the states near valence band edge and narrows the band gap. The disclosed process in this study is industrial safe, convenient and cost-effective. We further produce a significant amount of TiO 2 -based catalysts without any hydrogen reduction treatment.
KW - Hydrogen evolution
KW - Metal ion doping
KW - Nanofiber morphology
KW - Phase transition
KW - Photocatalysis
KW - TiO
UR - http://www.scopus.com/inward/record.url?scp=85029596335&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2017.09.035
DO - 10.1016/j.apsusc.2017.09.035
M3 - 文章
AN - SCOPUS:85029596335
SN - 0169-4332
VL - 430
SP - 390
EP - 398
JO - Applied Surface Science
JF - Applied Surface Science
ER -