2020年2月24日 · Using transmission electron microscopy, we find that one- to few-unit-cell-wide intergrowths of zeolite MEL exist within 2D-MFI. We identify the planar distribution of these 1D or near-1D-MEL...

2021年3月12日 · XRD patterns of MEL zeolites prepared using (1) 2,2-diethoxytrimethylammonium hydroxide; (2) tetrabutylammonium hydroxide; and (3) N,N-diethyl-3,5-dimethylpiperidinium hydroxide .

2005年10月30日 · A detailed study of the kinetics of crystallization of zeolite MEL was carried out at temperatures of 120, 135 and 150 °C for time intervals between 0 and 72 h. The evolution of the nucleation and growth process was followed by X-ray powder diffraction, Infrared Spectroscopy and Scanning and Transmission Electron Microscopy.

5 天之前 · The XRD patterns of Fe 3 O 4 @Mel (Fig. 8a), Fe 3 O 4 @Mel@CuO (Fig. 8b), Fe 3 O 4 @Mel-CC@TEPA (Fig. 9a) and Fe 3 O 4 @Mel-CC@TEPA@CuO (Fig. 9b) nanocomposites exhibited diffraction peaks at 2θ ...

Figure 2 provides the XRD patterns of the MEL and MFI zeolite samples. We have previously proposed a novel approach to steam-assisted crystallization using TBAOH as a template effective in the synthesis of pure-phase MEL zeolite at a SiO 2 /Al 2 O 3 molar ratio of 70 [ 25 ].

2023年9月26日 · MEL-type zeolite was synthesized by a novel steam-assisted crystallization method. This zeolite was characterized by X-ray diffraction, low-temperature nitrogen adsorption/desorption, scanning electron microscopy, and X-ray fluorescence analysis.

2013年2月26日 · The results of XRD characterization indicate that the MEL zeolites did not lose their crystalline initial structure, after all the chemical and thermal treatments. On the other hand, the stability of the FAU zeolites, during the ionic exchange process with transition cations, depended on the acidity of the saline solution used.

2014年8月11日 · 氮吸附，热重一差热分析等手段对所合成的MEL沸石纳米晶进行裹征。 纳米沸石的粒径由XRD，SEM，TEM确定，其形貌可通过SEM，TEM观察。 小于20nm，与Ⅺ①计算结果接近。 由此可断定，粒径约为100nnl的沸石晶. 粒实质是由20mn棒状晶体聚集而成。 由于粒径微小，表面能高，小粒子容易. 得到的粒径数据从不同角度，直观地反映了纳米粒子团聚的真实状态。 石纳米晶样品相应的IR和Raman光谱比较。 MEL和MFI沸石纳米晶的讯. OH缺陷。 MEL …

Here, we report direct visualization of radiolysis-driven restructuring of rutile TiO2 under electron beam irradiation. Using annular dark field imaging and electron energy-loss spectroscopy...

合成并表征了一种具有mel拓扑结构的新型结晶微孔硅酸钛（ts-2）。通过光谱学（xrd，ir，uv-vis），吸附和催化测量来表征si / ti比在14至124之间的ts-2样品。