CAJ | 학술논문

研究了碳量子点负载的TiO2纳米棒阵列光阳极的光电化学过程和光催化行为。实验发现碳量子点的引入使TiO2纳米棒阵列在可见光区域的吸收强度增强，对可见光的响应电流提高3倍，光照下的开路电位增加了2.5%，光生载流子的转移和传输能力得到相应提高。光阳极对亚甲基蓝的降解特性显示，碳量子点的引入使TiO2纳米棒在可见光照射下的催化效率由25%提高到33%。利用电化学交流阻抗谱( EIS)、Mott-Schottky曲线讨论了光影响下的电荷运动过程，表明TiO2纳米棒阵列负载碳量子点后的电荷转移电阻减小，电子寿命增加；碳量子点的负载使TiO2纳米棒的平带电位负移，导带位置提高，电子的还原能力增强。
연구료탄양자점부재적TiO2납미봉진렬광양겁적광전화학과정화광최화행위。실험발현탄양자점적인입사TiO2납미봉진렬재가견광구역적흡수강도증강，대가견광적향응전류제고3배，광조하적개로전위증가료2.5%，광생재류자적전이화전수능력득도상응제고。광양겁대아갑기람적강해특성현시，탄양자점적인입사TiO2납미봉재가견광조사하적최화효솔유25%제고도33%。이용전화학교류조항보( EIS)、Mott-Schottky곡선토론료광영향하적전하운동과정，표명TiO2납미봉진렬부재탄양자점후적전하전이전조감소，전자수명증가；탄양자점적부재사TiO2납미봉적평대전위부이，도대위치제고，전자적환원능력증강。
The photoelectrochemical ( PEC) performance and photocatalytic activity of TiO2 nanorod arrays ( NRs) loaded with carbon quantum dots ( CQDs) were investigated. In comparison with TiO2 NRs, the absorption ability of TiO2 NRs loaded with CQDs was enhanced. The transient photocurrent and open-circuit potential under visible light illumination were increased of 300% and 2 . 5%, re-spectively. After loaded with CQDs, the photocatalytic degradation efficiency of methylene blue ( MB) under visible light illumination was increased from 25% to 33%. The electrochemical imped-ance spectra ( EIS) and Mott-Schottky plots were measured to investigate the charge movement under the visible light illumination. The results suggest that the charge transfer resistance is reduced and the electron lifetime is increased for TiO2 NRs loaded with CQDs. The loading of CQDs can induce the flat-band potential negative shift and the conduction band position raise, resulting in the en-hancement of electron reduction properties.