کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6453887 1418807 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication of hollow mesoporous SiO2-BiOCl@PANI@Pd photocatalysts to improve the photocatalytic performance under visible light
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Fabrication of hollow mesoporous SiO2-BiOCl@PANI@Pd photocatalysts to improve the photocatalytic performance under visible light
چکیده انگلیسی


- The carrier, H-mSiO2,provides photocatalyst with super adsorption performance.
- H-mSiO2, as a light-storing material, works on photocatalytic process.
- Interacted interfaces of BiOCl/PANI improve separation of electron-hole pairs.
- The present of Pd NPs with LSPR makes BiOCl photoexcited at visible light.
- Degradation rate of 140 °C HBPP5wt.% is 9.5 * 10−3 min−1, which is 13.3 times than HBP.

A facile method was developed to synthesize a series of hollow mesoporous SiO2-BiOCl@PANI@Pd (HBPP) photocatalysts with super adsorption performance, plasmonic effect and fast interfacial charge migration. The samples were characterized by XRD, FETEM, FT-IR, XPS, DRS, etc. Photocatalytic degradation of methyl orange (MO) by HBPP composites was investigated.Results showed that the photocatalytic property of HBPP composite was superior to that of hollow mesoporous SiO2-BiOCl@PANI (HBP) composite under visible light irradiation, and the HBPP5wt% photocatalyst synthesized under 140 °C exhibits the highest photocatalytic activity. In this photocatalysis system, the orderly mesoporous opening structure of the hollow mesoporous SiO2 sphere could effectively facilitate the transfer of reactant molecules, and the existence of the internal cavities would effectively prolong the action time of the irradiated light for the multiple reflections. Moreover, the formation of interacted interfaces between the semiconductor BiOCl and conducting polymer (polyaniline) could effectively improve the separation of the photogenerated electron-hole pairs, and the palladium nanoparticles (Pd NPs) with strong localized surface plasmon resonance (LSPR) absorption band in the near-UV region could effectively induce the generation of the photoexcited electron-hole pairs in BiOCl, thus the as-obtained photocatalyst exhibits superior photocatalytic activity under visible light irradiation. The work may set foundation for application of the new photocatalyst of HBPP-based LSPR and make an important step forward remedying environmental pollution.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 213, 15 September 2017, Pages 136-146
نویسندگان
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