Open AccessGreen synthesis of carbon quantum dots embedded onto titanium dioxide nanowires for enhancing photocurrent
Author(s) -
YinCheng Yen,
ChiaChi Lin,
PingYu Chen,
WenYin Ko,
Tzu-Rung Tien,
KuanJiuh Lin
Publication year - 2017
Publication title -
royal society open science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 51
ISSN - 2054-5703
DOI - 10.1098/rsos.161051
Subject(s) - photocurrent , materials science , nanowire , titanium dioxide , electrochemistry , photocatalysis , electron paramagnetic resonance , photochemistry , semiconductor , titanium , water splitting , electrolyte , singlet oxygen , oxygen , chemical engineering , nanotechnology , electrode , optoelectronics , catalysis , chemistry , nuclear magnetic resonance , organic chemistry , physics , engineering , metallurgy
The green synthesis of nanowired photocatalyst composed of carbon quantum dots-titanium hybrid-semiconductors, CQDs/TiO 2 , are reported. Where graphite-based CQDs with a size less than 5 nm are directly synthesized in pure water electrolyte by a one-step electrochemistry approach and subsequently electrodeposited onto as-prepared TiO 2 nanowires through a voltage-driven reduction process. Electron paramagnetic resonance studies show that the CQDs can generate singlet oxygen and/or oxygen radicals to decompose the kinetic H 2 O 2 intermediate species upon UV light illumination. With the effect of peroxidase-like CQDs, photocurrent density of CQDs/TiO 2 is remarkably enhanced by a 6.4 factor when compared with that of as-prepared TiO 2 .
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