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论文类型：期刊论文

发表时间：2020-04-01

发表刊物：APPLIED CATALYSIS B-ENVIRONMENTAL

收录刊物：EI、SCIE

卷号：263

ISSN号：0926-3373

关键字：In2O3-based photocatalyst; Core@shell structure; Charge carriers lifetime; In situ FTIR; 1,2-dichlorobenzene

摘要：In2O3-based nanocomposites with ultralong lifetime charge carriers were successfully prepared by deposition of a thin polyaniline (PANI) shell on the In2O3 monodispersed nanospheres and used as a visible-light responsive catalyst for the decomposition of gaseous 1,2-dichlorobenzene. The effect of PANI shell modification on the micro-structures, optical properties, as well as transfer dynamic behaviors and lifetime of charge carriers were investigated, respectively. Meanwhile, the catalytic oxidation process and the corresponding intermediates of 1,2-dichlorobenzene were investigated by in situ FTIR spectroscopy. More importantly, the optical absorption and the time-resolved photoluminescence investigation jointly corroborated that the enhancement of photocatalytic performance by modification of PANI shell was highly correlated with the substantially prolonged lifetime of charge carriers and simultaneously narrowing bandgap. Thus, it resulted in improved charge separation efficiency and visible-light absorption capability, respectively. This study provides an interesting insight and meaningful guideline for designing long-lifetime In2O3-based heterojunctions via conductive polymer coating.