کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1609154 1516258 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of porous carbon–titania nanocomposite films as solar selective absorbers
ترجمه فارسی عنوان
آماده سازی و مشخص کردن فیلم های نانوکامپوزیت متخلخل سیلیکا تیتانیایی به عنوان جذب کننده های خورشیدی
کلمات کلیدی
جذب کننده های خورشیدی انتخابی، نانوبلورهای کربنی، فیلم های کامپوزیتی متخلخل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی


• The nanocomposites porous C/TiO2 film were fabricated via PIPS method.
• The HRTEM reveals the size of carbon nanoparticles is about 1.1 nm.
• The PVP advantages residual carbon content but suppresses its crystallization.
• The film exhibits high α (0.928–0.959) with low ε (0.074–0.105) for single layer.

Newly proposed selective solar absorbers of porous carbon–titania nanocomposite films with a well-defined interconnected macropores structure were prepared via a polymer-assisted photopolymerization-induced phase-separation method. The microstructure and optical properties of as-deposited nanocomposite films were characterized and discussed in detail. The results show that non-ionic water-soluble polymer polyvinylpyrrolidone works as a sol modifier advantaging the mean size of the interconnected macropores, residual carbon content, and films thickness, but suppresses the order degree of the carbon remained in the films. The high-resolution transmission electron microscopy demonstrated that a small amount of graphite particles with size of around 1.1 nm embedded in the cavity of the porous while the wall of the porous consists of amorphous carbon and titania composites. The single layer of as-prepared porous C/TiO2 nanocomposite films exhibits high solar absorptance (α = 0.928–0.959) with low thermal emittance (ε = 0.074–0.105), yielding an optimized photothermal conversion efficiency η = α − ε of 0.864 corresponding to a film thickness of around 338 nm, indication of such film is fair enough to serve as an excellent solar absorber.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 635, 25 June 2015, Pages 129–135
نویسندگان
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