단일 헤마타이트 입자 내 이질적인 광-펜톤 활성의 화학발광 이미징

다국어 초록 (Multilingual Abstract)

In this study, we present a novel approach using chemiluminescence imaging to visualize heterogeneous photo-Fenton activity within individual hematite photocatalysts. The photocatalytic activity of hematite was analyzed at the single-particle level using chemiluminescence microscopy, and a mechanism for the photo-Fenton reaction, in which Fe2+/Fe3+ cycling drives continuous generation of reactive oxygen species, was proposed. Additionally, we characterized the hematite photocatalysts with varying shapes and sizes through individual and statistical analyses, identifying unique heterogeneous photo-Fenton active sites within dendritic hematite particles. Specifically, the branch of snowflake-shaped hematite exhibited 83% and 92% higher activity compared to the core and trunk, respectively. Furthermore, adsorption modeling, along with AFM and TEM analyses, was used to investigate the underlying causes of this heterogeneity.

목차 (Table of Contents)

• 제 1 장 서론 1
• 1.1 촉매의 이질성 1
• 1.2 화학발광 (Chemiluminescence) 2
• 1.3 광-펜톤 반응 (Photo-Fenton reaction) 5
• 1.4 Hematite (α-Fe2O3) 7
• 1.5 연구 목적 8
• 제 2 장 실험 9
• 2.1 시약 및 자재 9
• 2.2 Dendritic hematite 합성 9
• 2.3 Hematite 분산 및 고정 10
• 2.4 CL microscopy 10
• 2.5 기기 11
• 제 3 장 실험 결과 및 고찰 12
• 3.1 Dendritic hematite 합성 12
• 3.2 광-펜톤 활성의 CL 이미징 20
• 3.2.1 단일 hematite 입자의 광-펜톤 활성 시각화 20
• 3.2.2 광촉매와 빛의 상관관계 25
• 3.2.3 광-펜톤 반응 메커니즘 30
• 3.3 단일 hematite 입자의 광-펜톤 활성 분석 32
• 3.3.1 Hematite 광촉매 특성 분석 32
• 3.3.2 Hematite 입자 내 이질적 광-펜톤 활성 원인 분석 38
• 제 4 장 결론 43
• 참고문헌 44