We have reported the synthesis of mesoporous aluminosilicates (MAs) with high hydrothermal stability via assembly of basic characteristic structure units of typical microporous zeolite Y. In spite of this, high consumption of organic template and H 2 O remains a major obstacle to its industrial application. Herein, a facile and effective strategy called "composite templates" was employed to decrease significantly the amount of P123 and H 2 O. In this method, composite micelles of P123/ poly(vinyl alcohol) (PVA) could be more easily dispersed in the solution due to the lowering of water's surface tension caused by the free hydroxyl groups of PVA. Moreover, the improved assembly ability of composite micelles in high concentration solution leads to the synthesis of hydrothermally stable MAs with 45% decrease of organic template P123 and 81% that of water amount. It was found that by the introduction of composite templates, the textural properties such as the surface area of materials, volume of pore, size of pore, and thickness were enlarged simultaneously. Meanwhile, this article presented an understanding into the assembly of composite micelles in the process of synthesis of MAs.

This article reports a novel strategy for preparing NiMo/γ-Al2O3 ultradeep hydrodesulfurization (HDS) catalysts via thermal decomposition of layered double hydroxides (LDHs). Ni–Al–[C6H4(COO)2]2–-LDHs/γ-Al2O3 (terephthalate-pillared Ni–Al-LDHs/γ-Al2O3) composites were first obtained by in situ crystallization of Ni–Al–[C6H4(COO)2]2–-LDHs on the surface of γ-Al2O3. Then Ni–Al–Mo7O24 6–-LDHs/γ-Al2O3 composites were synthesized from the above composites by the anion exchange of [C6H4(COO)2]2– with Mo7O24 6–. Finally, bimetallic Ni–Mo/γ-Al2O3 catalysts were obtained by the subsequent decomposition of Ni–Al–Mo7O24 6–-LDHs/γ-Al2O3. The LDHs strategy imposes significant effects on improving the Ni/Mo dispersion with weak interaction of active metal and support and thereby greatly improves the HDS properties of the resulting catalysts. The HDS assessment results revealed that the catalyst obtained by LDHs procedure exhibits outstanding HDS activities for 4,6-dimethyldibenzothiophene and Dagang FCC diesel. The novel strategy employed in this article sheds light on the industrial preparation and application of NiMo/γ-Al2O3 catalysts.

The 2008 Wenchuan Earthquake triggered massive landslide erosion, especially in mountainous terrain, which had a great impact on carbon storage of the local terrestrial ecosystem. However, variation in carbon flux and restoration of ecosystem function after the Wenchuan Earthquake remain open issues. In this study, we evaluated the current restored vegetation productive capability on the coseismic landslide scars through moderate resolution imaging spectroradiometer (MODIS) net primary productivity (NPP) imagery, and explored their sensitivity to meteorological, topographical, and geological factors. The spatio-temporal evolution and future sustainability of NPP of the landslides after the Earthquake were revealed. The following results were obtained: (i) After 13 years, only 45.36% of the vegetation productivity capability of the landslide scars reached the pre-earthquake level. (ii) Meteorological factors (precipitation and temperature) have strongest influences on vegetation productivity capability recovery over the coseismic landslide scars, followed by topography (aspect, slope, and altitude) and the lithology of landslides. (iii) The extremely significant improvement (p < 0.01) and significant improvement (0.01 ≤ p < 0.05) in annual NPP pixel values from 2008 to 2021 accounted for 18.92% and 28.30% of the total area, respectively. The slight degradation (p < 0.1) in annual NPP pixel values from 2008 to 2021 account for 0.01% of the total area. In general, the NPP has shown an improving trend since the Wenchuan Earthquake. Moreover, 60.95% of the total area shows the trends of continuous improvement in the future. This study provides important insight into how mega-earthquakes affect regional ecosystem carbon flux and contributes to our understanding of ecosystem carbon cycles along with earthquake-induced geohazard chains.

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