Synthesis ofalpha-MoO$lt;inf$gt;3$lt;/inf$gt; Nanobelt and Its Photocatalytic Oxidative Desulfurization(Photo-ODS) Activity of Simulation Fuel

Abstract

摘 要: 采用简单的水热法获得了一维结构的 α-MoO 3 纳米带, 利用 XRD、SEM、TEM、EDS 和 UV-Vis-DRS 光谱 等测试手段对其相组成、形貌、纯度和光吸收特性进行表征。以噻吩模拟含硫污染物探讨了 α-MoO 3 纳米带对模拟 FCC 汽油的光催化氧化脱硫( Photo-Cat-ODS) 活性及其光催化氧化脱硫机理。结果表明: 一维 α-MoO 3 纳米带有利 于抑制光生电子和空穴的复合, 对模拟 FCC 汽油光催化脱硫活性远高于商品 MoO 3 和商品二氧化钛(P25), 可见光 光照 240 min 模拟汽油 FCC 的脱硫率达到 86.9%。 关 键 词: 水热法; α-MoO 3 纳米带; 光催化氧化; 脱硫 中图分类号: TQ174 文献标识码: A Abstract: 1 D α-MoO 3 nanobels were prepared by facile hydrothermal synthesis. Phase, morphology, purity and optical adsorption properties of as-synthesized samples were investigated by XRD, SEM, TEM, EDS and UV-Vis-DRS spectra. Furthermore, thiophene was selected as a typical pollutant of simulated fuel to evaluate the photocatalytic oxidative desulfurization (Photo-Cat-ODS) activity of as-prepared 1 D α-MoO 3 nanobelt and the mechanism for the photocatalytic oxidation of thiophene was explored. The photocatalysis experimental results indicate that photocatalytic oxidative desulfurization activity of 1 D α-MoO 3 nanobelts is better than that of purchased MoO 3 and P25 due to their reducing recombination of photogenerated electron-hole pairs. The desulfurization rate of simulated FCC fuel reaches 86.9% under visible light irradiation for 240 min.

Ultrabroadband Nanocavity of Hyperbolic Phonon–Polaritons in 1D-Like α-MoO3

“…Representative scanning electron microscopy (SEM) images of the α-MoO3 nanobelts (Figure 1c) reveal welldefined rectangular-like shapes for the synthesized crystals in which the long-axis corresponds to the [001] direction, as already reported [38][39][40][41] . The synthesis produced nanobelts of widths (w) varying between 150 and 400 nm and lengths, from 10 to 30 mm.…”