Catalyst g-C3N4 and MgO-g-C3N4 have synthesized using Furnace box. g-C3N4 is synthesized using melamine as a precursor then MgO is made dopant. g-C3N4 and MgO-g-C3N4 were synthesized with various temperatures, namely 450⁰C, 500⁰C, 550⁰C, 600⁰C, 650⁰C. Characterization was carried out to test the structure of g-C3N4 and MgO-g-C3N4. Characterization testing is carried out using UV-Visible Diffuse Reflectance Spectra (UV-Vis DRS), Fourier Transform Infra-Red (FT-IR), X-Ray Diffraction (XRD), X-Ray Photoelectron Spectrometer (XPS), Electron Paramagnetic Resonance (EPR). g-C3N4 and MgO-g-C3N4 have different characterizations in each temperature variation. Temperature of 550⁰C shows a very significant characterization when compared to other temperatures. The g-C3N4 and MgO-g-C3N4 band gap also experienced a shift from 2.82 eV to 2.7 eV. This shows adsorption isotherms part IV which shows characteristics of mesoporous structures that are in accordance with IUPAC in the classification of elements and compounds. Then for the application of g-C3N4 and MgO-g-C3N4 catalysts carried out on Methylene Blue pollutants and E-coli bacteria. At the temperature of synthesis 550⁰C this catalyst application works well, this is evidenced by the percentage decrease in each temperature variation, both in pollutants and bacteria. The most supportive thing is that characterization is also in line with the application and can be seen clearly through the results of the correspondence analysis between the rate of constant decrease in MB and E-coli with visible light minus the dark EPR signal.

Abstract ..................................................... i
Acknowledge .................................................. ii
Table of Contents ............................................ iv
List of Tables ............................................... vi
List of Figure .............................................. vii
List of Equation ............................................. ix
Chapter 1 Introduction ....................................... 1
1.1 Research Background ................................... 1
1.2 Research Motivation ................................... 2
1.3 Aim of the Thesis ..................................... 4
Chapter 2 Literature Review .................................. 6
2.1 Definition of Photocatalysist ............................ 6
2.2 Discovery and Development of g-C3N4 and MgO-g-C3N4 ....... 8
Chapter 3 Experimental Instruments and Principles ............ 11
3.1 Synthesis Techniques ..................................... 11
3.2 Characterization Technique ............................... 13
3.2.1 UV-Visible Diffuse Reflectance Spectra ................. 13
3.2.2 Fourier Transform Infra-Red ............................ 15
3.2.3 X-Ray Diffraction ...................................... 17
3.2.4 X-Ray Photoelectron Spectrometer ....................... 18
3.2.5 Electron Paramagnetic Resonance ........................ 19
Chapter 4 Experimental Materials and Method .................. 22
4.1 Synthesis Catalyst ....................................... 22
4.1.1 Preparation g-C3N4 ..................................... 22
4.1.2 Preparation MgO-g-C3N4 ................................. 23
4.2 Preparation Samples ...................................... 24
4.2.1 Preparation Methylene Blue Pollutant ................... 24
4.2.2 Culture Escherichia coli (E-coli) Bacteria ............. 24
Chapter 5 Results and Discussion ............................. 27
5.1 Characterization Analysis ................................ 27
5.1.1 UV-Visible Diffuse Reflectance Spectra ................. 27
5.1.2 Fourier Transform Infra-Red ............................ 29
5.1.3 X-Ray Diffraction ...................................... 30
5.1.4 X-Ray Photoelectron Spectrometer ....................... 31
5.1.5 Electron Paramagnetic Resonance ........................ 35
5.2 Application Analysis ..................................... 38
5.2.1 Photocatalytic Degradation of Methylene Blue ........... 38
5.2.2 Photocatalytic Anti-microbial of Escherichia coli ...... 43
Chapter 6 Conclusion ......................................... 50
References ................................................... 52

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