Title

Photoelectrochemical Water Splitting Strategy for Green Hydrogen Production Using Eco-friendly Chalcogenide Materials

Alternative Title

친환경 칼코제나이드 물질을 이용한 녹색 수소 생산을 위한 광전기화학적 물 분해 전략

DGIST Authors

Jin Young Park ; Jongmin Choi ; Jiwoong Yang

Advisor

최종민

Co-Advisor(s)

Jiwoong Yang

Issued Date

2025

Awarded Date

2025-08-01

Type

Thesis

Description

Photoelectrochemistry, chalcogenides, nanocrystals, silver bismuth sulfide, titanium oxide, heterojunctions

Table Of Contents

List of Contents
Abstract i
List of contents ii
List of contents iv

Ⅰ. Introduction 1

ⅠⅠ. Theoretical Background 6
2.1 Principle of Photoelectrochemical Hydrogen Production 6
2.2 Physical and Photoelectrochemical Properties of AgBiS2 Nanocrystals 10
2.3 Limitations of Standalone Nanomaterials in PEC Applications 12
2.4 Theoretical Background of Heterojunction Electrodes Based on Metal Oxides 14
2.5 Heterojunction Techniques: EPD and Linker-Assist Method 17

ⅠⅠⅠ. Experimental Section 19
3.1 Chemicals and Materials 19
3.2 Synthesis of AgBiS2 Nanocrystals 20
3.3 Fabrication of PEC Electrodes Using AgBiS2 Nanocrystals 20
3.4 PEC measurement and analysis 22

ⅠV. Results and Discussion (I) 27
4.1 Properties of AgBiS2 nanocrystals 27
4.2 Preparation process for the AgBiS2 nanocrystal photoanodes for PEC water splitting 34
4.3 Effect of different ligands on AgBiS2 nanocrystal photoanodes on their photoelectrochemical water splitting performance 39
4.4 Visible and near-IR light usability of various photoanodes in a photoelectrochemical water splitting system 50

V. Results and Discussion (II) 66
5.1 Metal Oxide Heterojunction Electrode 66
5.2 Structural and Optical Characterization of AgBiS2/TiO2 Heterojunction Photoelectrodes 69
5.3 Surface Chemistry and Ligand Evaluation of AgBiS2/TiO2 Heterojunctions 76
5.4 Photoelectrochemical Performance of TiO2/AgBiS2 Heterojunction Photoanodes 82

VI. Summary 91

URI

https://scholar.dgist.ac.kr/handle/20.500.11750/59789
http://dgist.dcollection.net/common/orgView/200000890690

DOI

10.22677/THESIS.200000890690

Degree

Doctor

Department

Department of Energy Science and Engineering

Publisher

DGIST

Show Full Item Record