Show/Hide Menu
Hide/Show Apps
anonymousUser
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Açık Bilim Politikası
Açık Bilim Politikası
Frequently Asked Questions
Frequently Asked Questions
Browse
Browse
By Issue Date
By Issue Date
Authors
Authors
Titles
Titles
Subjects
Subjects
Communities & Collections
Communities & Collections
Synthesis of g-C3N4/TiO2 heterojunction composites with enhanced solar light photocatalytic activity
Download
index.pdf
Date
2020
Author
Gündoğmuş, Peli
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
3
views
0
downloads
The solar light sensitive g-C3N4/TiO2 composites containing various amounts of graphitic carbon nitride (g-C3N4) and titania (TiO2) were prepared by the hydrothermal and sol-gel processes for photocatalytic applications. Hydrothermally derived g-C3N4/TiO2 composites were subjected to regulated heat treatments at temperatures ranging from 350 to 500 oC for 1 h to improve their photocatalytic efficiency. Particle size, crystal structure, morphology, and optical properties of the g-C3N4/TiO2 nanocomposites were investigated and were compared with those of the pristine TiO2 and g-C3N4 powders using particle size analyzer, X-ray diffractometer, Field emission scanning electron microscope, Fourier transform infrared spectroscopy, Raman spectroscopy, diffuse reflectance spectroscopy (DRS) and UV-Vis spectrophotometer. Photocatalytic activity of all powders was assessed by the Methylene Blue (MB) degradation test under solar light illumination. The results revealed that g-C3N4/TiO2 composites exhibited better photocatalytic activity for the degradation of MB than both pristine TiO2 and g-C3N4. Hydrothermally derived and sol-gel derived g-C3N4/TiO2 composites showed 100% and 87.05%, respectively photocatalytic efficiency under 180 min solar light illumination. The enhancement in photocatalytic activity was related to the generation of reactive oxidation species induced by photogenerated electrons and reduced recombination rate of the electron-hole pairs.
Subject Keywords
Sol-gel process.
,
Heterojunction
,
Hydrothermal process
,
Sol-gel process
,
g-C3N4/TiO2 composites
,
Photocatalytic activity.
URI
http://etd.lib.metu.edu.tr/upload/12625289/index.pdf
https://hdl.handle.net/11511/45506
Collections
Graduate School of Natural and Applied Sciences, Thesis