染料化学翻译

A series of MCM-41 samples containing molybdenum oxide as active species in the mesoporous channels loaded by spontaneous monolayer dispersion (SMD) and impregnation (IM) have been prepared and characterized using XRD, N2adsorption–desorption analysis, Fourier transform infrared spectroscopy (FTIR) and intelligent gravimetric analyzer (IGA). The relative number of hydroxy on the adsorbents was investigated by in situ FTIR. Surface acidities of the adsorbents were studied by infrared spectroscopy of adsorbed pyridine and correlated with reactivity for adsorptive desulfurization. The IGA technique was employed to investigate adsorption behavior of thiophene and benzene on the adsorbents at 303 K. It is shown that MoO3 can be highly dispersed up to 0.2 g g−1 in the MCM-41 channels by the SMD strategy with the ordered mesoporous structure of the MoMM samples remaining intact. The ordered mesostructure of MCM-41 is, however, destroyed at higher MoO3 contents of 0.26 and 0.32 g g−1 with particle sizes of 1.2 nm and 3.6 nm, respectively, observed. For the MoMI(0.2) sample prepared by the IM method, the aggregation of the MoO3 particles takes place with a particle size of 6.5 nm obtained. The results are also revealed that the dispersion extent of the MoO3 species is related to the abundant surface hydroxy of MCM-41. The host species and guest species undergo solid-state reaction to form Si O Mo bonds in the mixtures which enhance both the Lewis acid and Brönsted acid of the samples. It has been concluded that the surface acidities of the sorbents contributes to the desulfurization performance which has also been investigated in this study. The octahedral coordinated species (Mo7O246−) are the adsorptive active species for desulfurization compared with the tetrahedral coordinated ones (MoO42−).

Abstract

一系列的MCM - 41样品含有钼氧化物为活性物种在介孔孔道的自发单层分散（贴片）和浸渍（即时通讯）已编写和特点采用X射线衍射，氮气吸附–解吸分析，傅立叶变换红外光谱（红外）和智能重量分析仪（球蛋白）。相对一些羟基的吸附剂进行了原位红外光谱。表面酸性的红外光谱研究吸附剂的吸附吡啶和相关反应吸附脱硫。免疫技术进行调查的吸附行为噻吩、苯的吸附剂在303光结果表明，MoO 3可高度分散到0.2克−1在MCM - 41的渠道贴片战略的有序介孔结构的momm样本保持不变。有序介孔MCM - 41，然而，在高钼含量的0.26和0.32克−1颗粒大小为1.2纳米和3.6纳米，分别，观察。为莫米（0.2）样品制备的即时通讯方法，聚集的MoO 3颗粒的发生与6.5纳米大小的颗粒，获得。结果还表明，分散程度的钼物种与丰富的表面羟基的MCM - 41。东道国的物种和物种进行固相反应形成硅的钼债券的混合物，提高了路易斯酸和质子酸的样品ö。已经得出结论认为，表面酸性的吸附剂有助于脱硫性能也进行了研究。八面体协调物种（mo7o246−）是吸附活性物种，脱硫与四面体协调人（moo42−）。