Title

Interfacial Molecular Engineering of Macrocycle-Fullerene-Molybdenum Disulfide Heterostructures for Photocatalytic and Piezocatalytic Effect

DGIST Authors

Chaewon Lee ; Chiyoung Park ; Dae-Hyun Nam

Advisor

박치영

Co-Advisor(s)

Dae-Hyun Nam

Issued Date

2023

Awarded Date

2023-02-01

Citation

Chaewon Lee. (2023). Interfacial Molecular Engineering of Macrocycle-Fullerene-Molybdenum Disulfide Heterostructures for Photocatalytic and Piezocatalytic Effect. doi: 10.22677/THESIS.200000656610

Type

Thesis

Description

Mechanochemistry, Photocatalyst, Hydrogen production, Interfacial engineering, Piezo-photocatalysis

Table Of Contents

I . Introduction 1
1.1 Mechanochemistry 1
1.1.1 Principles of Mechanochemistry 1
1.1.2 Liquid assisted grinding 1
1.2 2D Transition Metal Dichalcogenide 2
1.2.1 Mechanical Exfoliation Methods of TMD 2
1.2.2 Cyclodextrin Assisted Aqueous TMD Exfoliation 3
1.3 Photocatalytic Hydrogen Production 5
1.3.1 Mechanism of Photocatalytic Water Splitting 5
1.3.2 Band Gap 6
1.3.3 Sacrificial Agent and Photosensitizer 7
1.3.4 MoS2 Based Photocatalyst 7
1.3.5 C60 cocatalyst 8
1.4 Piezo-Photocatalytic Effect 9
1.4.1 Piezoelectric 9
1.4.2 Piezocatalytic effect 9
1.4.3 Piezo-Photocatalytic Hydrogen Evolution 11
1.5 Volatile Organic Compounds 12
1.5.1 VOCs Removal from Wastewater 12
1.5.2 Membrane Distillation 13
1.5.3 Photothermal/Photocatalytic Membrane 13

II . Experimental 15
2.1 Materials and Methods 15
2.2 Preparation of MoS2-C60-γCD Heterostructure 15
2.3 Photocatalytic Hydrogen Production Measurements 15
2.4 Dye degradation via piezo-photocatalysis effect 16
2.5 Hydrogen production via piezo-photocatalysis effect 16
2.6 Fabrication of PVDF/MoS2-C60-γCD 16
2.7 Fabrication of PVDF/MoS2-C60-γCD/GA 16
2.8 Phenol rejection test 16

III . Results and Discussion 19
3.1 Results and Discussion of Photocatalytic Hydrogen Production 19
3.1.1 Determination of Cyclodextrin Type 19
3.1.2 Determination of Cyclodextrin Concentration 19
3.1.3 XRD data of MoS2-C60-γCD Heterostructures 21
3.1.4 Raman data of MoS2-C60-γCD Heterostructures 21
3.1.5 Electron Microscope Images of MoS2-C60-γCD Heterostructures 22
3.1.6 Photocatalytic Performance of MoS2-C60-γCD Heterostructures 23
3.2 Results and Discussion of Piezo-Photocatalytic Effect 25
3.2.1 RB Degradation Under Ultrasonic Vibration 25
3.2.2 Hydrogen Production Under Ultrasonic Vibration 26
3.3 Results and Discussion of VOCs Rejection 28
3.3.1 Characterization of the MoS2-C60-γCD Membrane 28
3.3.2 Photothermal Evaporation 29
3.3.3 VOCs Removal from Wastewater 30

IV . Conclusion 32
V . References 33
VI . Korean Summary 37

URI

http://hdl.handle.net/20.500.11750/45738
http://dgist.dcollection.net/common/orgView/200000656610

DOI

10.22677/THESIS.200000656610

Degree

Master

Department

Department of Energy Science and Engineering

Publisher

DGIST

Show Full Item Record