Idris, Nurul Hidayah Mohamad
(2024)
Synthesis And Characterisation Of Carbon, Nitrogen Co-Doped-Titanium Dioxide/Sodium Alginate Buoyant Photocatalyst For Degradation Of Diazinon.
PhD thesis, Perpustakaan Hamzah Sendut.
Abstract
The utilisation of titanium dioxide (tio2)- based photocatalysts has garnered
significant attention among researchers due to their promising potential for removing
pollutants from wastewater. Buoyant photocatalysts are being explored as viable
candidates for wastewater treatment applications, aiming to address filtration
challenges during the treatment process. In this study, the design of modified tio2
with a highly durable buoyant carrier is essential to enhance its photocatalytic
performance in degrading pollutants from wastewater. Subsequently, carbon (c) and
nitrogen (n)-codoped tio2 nps with varying c:n percentages were successfully
developed using the sol-gel method. These optimised c, n-tio2 nps exhibit
favorable attributes, including activity in the visible light region with a lower
bandgap energy of 2.94 ev compared to the 3.0 ev of the synthesised tio2 nps, as
well as slower recombination of electron-hole pairs than the synthesised tio2 nps.
X-ray photoelectron spectroscopy (xps) analysis further verified the co-doping of c
and n into tio2, evidenced by the shift in ti2p binding energy.
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