We report a new strategy for the synthesis of robust hierarchical microand mesoporous MOFs from water stable MOFs via a selective acid etching process. The process is controlled by the size-selective diffusion of acid molecules through the MOF windows. This method enables the fine-tuning of the porosity of hierarchical MOFs, allowing for the generation of well-defined mesopores with high mesopo...

Mesoporous silica with worm-like pores of 9–10 nm in size were studied by small-angle neutron scattering (SANS) and high-resolution porosimetry, using nitrogen at 77 K and argon at 87 K. The pore sizes determined from SANS are in excellent agreement with those obtained from a recently developed non-local density functional theory (NLDFT) approach. Furthermore, the additional micropores in the m...

Exploring the relationship between formation pressure and shale pore evolution is helpful for enrichment development of marine gas accumulation theory. The thermal experiment was carried out on Xiamaling Formation (Pr3x) lowly matured shale, which has a similar sedimentary environment to Longmaxi (S1l) highly shale. Comparative experiments open semi-closed pyrolysis multiple structure character...

Mesoporous silica materials have been utilized for various applications (catalysis, sensing, drug delivery, adsorption and separation) due to their uniform mesoporous features as well as high surface areas. When organic polymer layers are introduced to the mesopore walls, the physicochemical properties as well as surface nature of the silica (e.g. hydrophilicity and surface charge) can be alter...

The Jurassic Lianggaoshan Formation lacustrine shale oil is the most potential exploration target of unconventional hydrocarbon resource in Southwest China. In this study, nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), low-temperature N 2 adsorption (LTNA), and high pressure mercury intrusion injection capillary are intergrated to reveal pore structure its controlling fac...

Four samples of MFI zeolites with silica to alumina ratio 100 and using different carbon mass ratios (1:1, 1:4, 1:8 1:12) were synthesized by black particles. Silica-alumina molar imposes the framework structure zeolites. In general an increase in silica-alumina gel ratio, thermal stability, acid resistance hydrophobicity product increases ion-exchange capacity decreases. A higher (as high as 1...