논문 상세보기
pp.14-22
To improve light absorption ability in the visible light region and the efficiency of the charge transfer reaction, Pd nanoparticles decorated with reduced TiO2 nanotube photocatalyst were synthesized. The reduced TiO2 nanotube photocatalyst was fabricated by anodic oxidation of Ti plate, followed by an electrochemical reduction process using applied cathodic potential. For TiO2 photocatalyst electrochemically reduced using an applied voltage of -1.3 V for 10 min, 38% of Ti4+ ions on TiO2 surface were converted to Ti3+ ion. The formation of Ti3+ species leads to the decrease in the band gap energy, resulting in an increase in the light absorption ability in the visible range. To obtain better photocatalytic efficiency, Pd nanoparticles were decorated through photoreduction process on the surface of reduced TiO2 nanotube photocatalyst (r10-TNT). The Pd nanoparticles decorated with reduced TiO2 nanotube photocatalyst exhibited enhanced photocurrent response, and high efficiency and rate constant for aniline blue degradation; these were ascribed to the synergistic effect of the new electronic state of the TiO2 band gap energy induced by formation of Ti3+ species on TiO2, and by improvement of the charge transfer reaction.
1.서 론
2. 실험 방법
2.1. 복합 광촉매 제조 및 표면특성 관찰
2.2. 광 촉매의 전기화학적 특성 조사
2.3. 염료분해와 반응효율 조사
3. 결과 및 고찰
3.1. TNT 환원처리 및 특성변화
3.2. Pd 이종결합된 r-TNT 광촉매 제조
3.3. 광촉매의 XRD 분석
3.4. 광전기화학적 특성 분석
3.5. 표면의 화학적 결합상태 분석
3.6. 광촉매의 밴드갭 에너지 변화
3.7. 염료분해 반응
4.결 론
Reference
