Journal
JOURNAL OF NANOPARTICLE RESEARCH
Volume 17, Issue 12, Pages -Publisher
SPRINGER
DOI: 10.1007/s11051-015-3293-x
Keywords
In2S3 nanoflowers; Ionic dyes; Reactive species; Degradation; Daylight-driven photocatalysis; Surface science; Surface electrical charging
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Funding
- Youth National Science Foundation of China [51302241, 21507107]
- National Science Foundation of China [51472100]
- Foundation of Henan Educational Committee [14A430005]
- Science and Technology Development Plan Foundation of Xuchang [1504018]
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Even though dye degradation is a successful application of semiconductor photocatalysis, the roles of reactive species in dye degradation have not received adequate attention. In this study, we systematically investigated the degradation of two cationic dyes (rhodamine B and methylene blue) and two anionic dyes (methyl orange and orange G) over negatively surface-charged In2S3 nanoflowers synthesized at 80 degrees C under indoor daylight lamp irradiation. It is notable to find In2S3 nanoflowers were more stable in anionic dyes degradation compared to that in cationic dyes removal. The active species trapping experiments indicated photogenerated electrons were mainly responsible for cationic dyes degradation, but holes were more important in anionic dyes degradation. A surface-charge-dependent role of reactive species in ionic dye degradation was proposed for revealing such interesting phenomenon. This study would provide a new insight for preparing highly efficient daylight-driven photocatalyst for ionic dyes degradation.
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