کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
729219 1461416 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Facile synthesis of nanostructured monoclinic bismuth vanadate by a co-precipitation method: Structural, optical and photocatalytic properties
ترجمه فارسی عنوان
سنتز نانوکامپوزیت نانوساختار بیسموت وانادات با استفاده از روش هم پوشانی: خواص ساختاری، اپتیکی و فوتوکاتالیستی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی

We report the synthesis of bismuth vanadate (BiVO4) nanostructure by atoxic-free, inexpensive co-precipitation method. The BiVO4 nanostructures were derived from bismuth nitrate and ammonia metavanadate as starting precursors and sodium hydroxide (NaOH) were used as stabilizers for tuning the morphology (nanorod, nanospheriod and nanoparticulate). The influence of post-calcination treatment (450, 550 and 650 °C) on structural, optical and photocatalytic properties of BiVO4 was studied. The post-calcination treatment strongly induces the crystallization process and produce monoclinic BiVO4 structure with predominant (112) crystallite phases. The absorbance of BiVO4 shows broad coverage of visible light wavelength region up to 550 nm, which is appreciable for solar light driven photocatalysis. Among the different calcinated samples, anisotropy rod-shape BiVO4 (calcinated at 450 °C) shows high optical absorbance than other treated (550 and 650 °C) samples. The monotonic shift in characteristic Raman vibration mode at 824 cm−1 with increasing calcination temperature indicates that the V–O bond length is affected by Bi3+ diffusivity. The PL spectra of these samples explore the intrinsic defects present in BiVO4, and found to be high in high temperature calcinated samples. The photocatalytic property of resultant BiVO4 samples was evaluated in oxygen generation with Ag+ donors. As a result of reduced defects and high optical absorbance, the BiVO4 calcinated at 450 °C showed high photocatalytic oxygen yield (1.02 mmol) compared with high temperature calcinated samples (0.48 mmol).The appreciable quantity of solar fuel O2 generation from the low-cost co-precipitation method can be widely implemented in other visible light metal oxide nanostructures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science in Semiconductor Processing - Volume 30, February 2015, Pages 343–351
نویسندگان
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