TY - JOUR
T1 - Worm-like FeS2/TiO2 Nanotubes for Photoelectrocatalytic Reduction of CO2 to Methanol under Visible Light
AU - Han, Ershuan
AU - Hu, Fengyun
AU - Zhang, Shuai
AU - Luan, Bo
AU - Li, Peiqiang
AU - Sun, Hongqi
AU - Wang, Shaobin
N1 - Funding Information:
This research was supported by the National Natural Science Foundation of China (Grant 21203114), the Natural Science Foundation of Shandong Province (Grant ZR2017MB018), and the Planning Project of Science and Technology in Colleges of Shandong Province (Grant J14LC16) and partially supported by the Australian Research Council (DP170104264). The authors are also grateful to the support from the Shandong Jingbo Holdings Corporation.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/4/19
Y1 - 2018/4/19
N2 - Photoelectrocatalytic (PEC) reduction of CO2 to hydrocarbons provides a great technique for CO2 utilization, renewable energy transformation, and storage. Iron disulfide (FeS2), as an earth-abundant and nontoxic semiconductor, has narrow band gap energy, high photovoltaic conversion efficiency, and light absorption, making it very promising as a photoelectrode in a PEC cell. Herein, novel worm-like FeS2/TiO2 nanotubes (NTs) was prepared by introducing FeS2 on TiO2 NTs and exhibited excellent PEC performance for CO2 reduction to methanol. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) showed that worm-like FeS2 was densely packed on the TiO2 NT substrate. By introduction of FeS2 on TiO2 NTs, the visible light absorption was improved greatly and the energy band gap energy was narrowed to 1.70 eV, which significantly enhanced the photocatalytic performance under visible light. Furthermore, the resistance was reduced with increasing electrocatalytic ability. The major product of PEC reduction of CO2 was methanol, reaching 91.7 μmol h-1 L-1.
AB - Photoelectrocatalytic (PEC) reduction of CO2 to hydrocarbons provides a great technique for CO2 utilization, renewable energy transformation, and storage. Iron disulfide (FeS2), as an earth-abundant and nontoxic semiconductor, has narrow band gap energy, high photovoltaic conversion efficiency, and light absorption, making it very promising as a photoelectrode in a PEC cell. Herein, novel worm-like FeS2/TiO2 nanotubes (NTs) was prepared by introducing FeS2 on TiO2 NTs and exhibited excellent PEC performance for CO2 reduction to methanol. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) showed that worm-like FeS2 was densely packed on the TiO2 NT substrate. By introduction of FeS2 on TiO2 NTs, the visible light absorption was improved greatly and the energy band gap energy was narrowed to 1.70 eV, which significantly enhanced the photocatalytic performance under visible light. Furthermore, the resistance was reduced with increasing electrocatalytic ability. The major product of PEC reduction of CO2 was methanol, reaching 91.7 μmol h-1 L-1.
UR - http://www.scopus.com/inward/record.url?scp=85045832556&partnerID=8YFLogxK
U2 - 10.1021/acs.energyfuels.7b03234
DO - 10.1021/acs.energyfuels.7b03234
M3 - Article
AN - SCOPUS:85045832556
SN - 0887-0624
VL - 32
SP - 4357
EP - 4363
JO - Energy and Fuels
JF - Energy and Fuels
IS - 4
ER -