1 research outputs found
Enhanced Photodegradation of Organic Pollutants by Carbon Quantum Dot (CQD) Deposited Fe<sub>3</sub>O<sub>4</sub>@mTiO<sub>2</sub> Nano-Pom-Pom Balls
Highly
water dispersible, superparamagnetic carbon quantum dot
(CQD) deposited Fe<sub>3</sub>O<sub>4</sub>@mTiO<sub>2</sub> pom-pom
balls have been prepared by a simple hydrothermal method. The effective
deposition of carbon dots expands the light absorption of mTiO<sub>2</sub> from the UV to visible region. The results of photocurrent
measurement reveal that an optimum deposition of C-dot at 20 wt %
significantly increases the photocurrent density. High surface area
and extended conjugation of carbon dots enhance the adsorption of
organic pollutants. The active species generated in the photocatalytic
system were also detected through trapping of radicals and holes in
the presence of various scavengers. In a comparison with a conventional
photocatalyst such as Degussa P25, the developed heterojunction shows
much higher degradation efficiency for ciprofloxacin, methylene blue,
quinalphos, and 4-nitrophenol under visible light. The light upconversion
properties of uniformly deposited carbon quantum dots could be a reason
for higher visible light catalytic activity of the synthesized magnetically
recoverable hybrid photocatalyst