Page 58 - IPCoSME 2021

1 INTERNATIONAL POSTGRADUATE CONFERENCE ON SCIENCE AND MARINE ENVIRONMENT 2021
st
(IPCoSME 2021)
“Environmental Sustainability Enhancement Through the Collaboration of Sciences”

RC-03

EFFECT OF TIO2 CONCENTRATION IN TIO2/G-C3N4 PHOTOCATALYST FOR
PHOTODEGRADATION OF METHYLENE BLUE

1
12
MUHAMMAD AMIR FIKRI MD FAUZI , MOHD HASMIZAM RAZALI *, MD
1
UWAISULQARNI OSMAN , BASIRAH MOHD AZAM 1

1 Faculty of Science and Marine Environment, Universiti Malaysia Terengganu,
21030 Kuala Nerus, Terengganu, Malaysia
2 Advanced Nanomaterials Research Group, Faculty of Science and Marine Environment,
Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia

*Corresponding author email: mdhasmizam@umt.edu.my
Abstract: Titanium dioxide (TiO2) has been one of the most important inorganic materials in

both fundamental research and industrial applications. Because of its outstanding chemical
stability, unique physical and chemical properties, low cost, non-toxicity, and ease of

preparation. Mesoporous materials are especially appealing as a photocatalyst because their
pores structure allows for extremely fast diffusion, adsorption, and photoreactions onto the
surface and pores. g-C3N4 has a narrow band gap energy, it can exhibit excellent photocatalytic

properties in visible light. The g-C3N4 was synthesized from urea and formed a yellow powder
g-C3N4. The anatase TiO2 was synthesized via hydrolysis method by using titanium

tetrachloride (TiCl4). The TiO2/g-C3N4 nanocomposite was fabricated via hydrolysis by
various amounts of TiCl4 ranging from 5 to 25 ml. The samples have been characterized by
using FTIR, XRD, SEM and TGA. The photocatalytic activity was conducted by using a

predetermined amount of photocatalyst on 20 ppm of methylene blue (MB) under UV
irradiation for 30 min light off and 300 min light on. Kinetic study as calculated by using

Langmuir−Hinshelwood model pseudo-first-order equation. The TiO2/g-C3N4 (2:1) perform
better compared to TiO2/g-C3N4 (2.5:1) in both photodegradation efficiency and kinetic study

as excess TiO2 particles can easily destroy the heterojunction between g-C3N4 and TiO2 and
cause the photodegradation efficiency to decrease. The TiO2/g-C3N4 (2:1) 100% degraded
-1
within 270 min with a rate constant of 0.0156 min and TiO2/g-C3N4 (2.5:1) 90% after 330
-1
min degradation with a rate constant of 0.0105 min . The assembly of TiO2 and g-C3N4 is
thought to be the most efficient synthesis technique for creating large area heterojunctions and

surface contacts, as well as increasing the photonic efficiency of the nanocomposite.

Keywords: nanocomposites, TiO2, g-C3N4, photocatalytic degradation, methylene blue

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