کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6454257 1418811 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Silver-inserted heterojunction photocatalyst consisting of zinc rhodium oxide and silver antimony oxide for overall pure-water splitting under visible light
ترجمه فارسی عنوان
فوتوکاتالیست هتروزاکتیوی نقرهای حاوی اکسید رودیوم روی و اکسید آنتیموان نقره برای تقسیم کلی خالص آب در زیر نور مرئی
کلمات کلیدی
دو مرحله کلی تقسیم آب، اکسید رودیوم روی، اکسید آنتیموان نقره، نقره، درمان آمونیاک،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


- We established a hetero-junction photocatalyst for overall pure-water splitting.
- The photocatalyst is a solid-state Ag-inserted ZnRh2O4 andAgSbO3.
- Ammonia and hydrogen peroxide treatments to remove excess Ag is required.
- The photocatalyst is capable of utilizing visible at wavelengths up to 660 nm.

Overall pure-water splitting under visible-light irradiation at wavelengths up to 660 nm was accomplished utilizing a solid-state hetero-junction photocatalyst following the Z-scheme mechanism in which zinc rhodium oxide (ZnRh2O4) and silver antimony oxide (AgSbO3) as hydrogen (H2)- and oxygen (O2)-evolution photocatalysts, respectively, were connected with silver (Ag, ZnRh2O4/Ag/AgSbO3). In our previous paper (Kobayashi et al., J. Phys. Chem. C, 118 (2014) 22450-22456), nitric acid (HNO3) treatment of mixtures of AgSbO3, Ag2O, and ZnRh2O4 after calcination formed defective AgSbO3 (Ag1-xSbO3-y) and the resulting photocatalyst, ZnRh2O4/Ag/Ag1-xSbO3-y, exhibited reduced visible-light wavelength sensitivity (up to 545 nm) and overall water-splitting activity. To overcome this limitation, here, unnecessary Ag was removed by treatment with ammonium hydroxide (NH4OH) and hydrogen peroxide (H2O2), which resulted in the successful formation of ZnRh2O4/Ag/AgSbO3. This photocatalyst was capable of utilizing visible light at wavelengths up to 660 nm and exhibited enhanced overall water-splitting activity. The synthesis approach described in this study represents a novel and facile method for preparing visible-light sensitive heterojunction photocatalysts connected with Ag.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 209, 15 July 2017, Pages 663-668
نویسندگان
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