کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1616588 1516377 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Free-polymer controlling morphology of α-MoO3 nanobelts by a facile hydrothermal synthesis, their electrochemistry for hydrogen evolution reactions and optical properties
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Free-polymer controlling morphology of α-MoO3 nanobelts by a facile hydrothermal synthesis, their electrochemistry for hydrogen evolution reactions and optical properties
چکیده انگلیسی

Orthorhombic molybdenum oxide (α-MoO3) nanobelts were successfully synthesized by the 100–180 °C and 2–20 h hydrothermal reactions of (NH4)6Mo7O24·4H2O solutions containing 15 ml 2 M acid (HNO3, H2SO4 or HCl) with no surfactant and template adding. These products were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopy, and electron microscopy (EM). In the present research, the product synthesized by the 180 °C and 20 h hydrothermal reaction of the solution containing HNO3 was α-MoO3 nanobelts with >10 μm long and <200 nm wide. Electrochemistry for hydrogen evolution reactions (HER) and optical properties of the as-synthesized α-MoO3 nanobelts were characterized by linear sweep voltammetry (LSV) and Tafel plot, including UV–vis and photoluminescence (PL) spectroscopy. These imply that α-MoO3 nanobelts show satisfied performance for HER, with the 3.75 eV direct allowed band gap (Eg) due to the charged transition of O2p → Mo4d, including the emission of 437 nm wavelength at room temperature.


► MoO3 nanobelts as an n-type semiconducting material.
► It was successfully synthesized by a facile hydrothermal reaction.
► A promising material with 3.75 eV band gap for hydrogen evolution reaction (HER).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 516, 5 March 2012, Pages 172–178
نویسندگان
, , , , , ,