Sm2O3/S-doped g-C3N4 nanocomposites with enhanced photocatalytic activities under visible light irradiation
محل انتشار: شانزدهمین کنگره ملی مهندسی شیمی ایران
سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 471
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شناسه ملی سند علمی:
NICEC16_586
تاریخ نمایه سازی: 7 خرداد 1398
چکیده مقاله:
Some Sm2O3/S-doped g-C3N4 (CNS) composites were synthesized with in situ method by simultaneous combining S doping in carbon nitride structure to produce CNS as well as hybridization of CNS with the Sm2O3 semiconductor. The photocatalytic activities of composite photocatalysts were investigated for the degradation of methylene blue (MB) as a model pollutant in aqueous solution under visible-light irradiation. The optimal Sm2O3 loading value was determined to be 8.9 wt% and its corresponding MB photodegradation rate was about 93% after 150 min light irradiation, which was indeed greater compared with those of the individual CNS and Sm2O3 samples. This enhanced photocatalytic performance was originated from characteristics of the hybrid formed between the Sm2O3 and CNS so that it improved the effective charge transfer through interfacial interactions between both components. In addition, the CNS synthesized by Sdoping exhibited a significant enhancement in the photocatalytic activity relative to that of the pure g-C3N4; this was mostly caused by the increase in its visible light harvesting ability and charge mobility. The possible mechanism for the photocatalytic degradation of MB was suggested and discussed in detail based on the findings acquired from radical/hole trapping experiments.
کلیدواژه ها:
نویسندگان
Zahra Mirzaeefard
Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box:۱۵۸۷۵-۴۴۱۳, Tehran, Iran.
Zahra Shariatinia
Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box:۱۵۸۷۵-۴۴۱۳, Tehran, Iran.
Milad Jourshabani
Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box:۱۵۸۷۵-۴۴۱۳, Tehran, Iran.
Amin Alizadeh
Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box:۱۵۸۷۵-۴۴۱۳, Tehran, Iran.