Thermal decompositions and heat capacities study of a co-based zeolitic imidazolate framework

Engineering metal–organic frameworks for adsorption-based gas separations: from process to atomic scale

“…Looking specifically at the studies on MOFs, limited data are available on their thermal conductivity and heat capacity. [103][104][105][106] Empirical models have been proposed to link the heat capacity of MOFs and their composition. 104 Molecular simulations have also been reported to counterbalance the lack of experimental data and provide fundamental insights in the thermal conductivities, [107][108][109][110][111][112] as well as heat capacity and thermal expansion of MOFs.…”

Pt, Ir, Ru, and Rh Nanoparticles Supported on ZIF-67 Nanocubes for Evaluation of Hydrogen Spillover Ability of Noble Metals

“…Additionally, supplementary TGA−DSC curves corresponding to experiments manifested in Figure 10a are plotted in Figure S9. The sharp endothermic peaks in DSC plots are indicative of the major weight loss stage, 20 which correlates well with the steep slopes in the TGA profiles. Therefore, the temperatures corresponding to 30−50 wt % weight loss were used to compare the hydrogen spillover ability.…”

“…In this connection, we note that ZIF-67 is a suitable candidate since it is reducible with atomic hydrogen, yet it can maintain structural integrity in a H 2 environment at elevated temperatures up to 300 °C, noting that Co 2+ has a relatively high standard reduction potential (−0.28 V) with respect to H 2 . This makes ZIF-67 still workable as a stable support material for hydrogenation reactions, such as CO 2 hydrogenation to methanol, which usually operates below 300 °C. − Meanwhile, ZIF-67 preserves good thermal stability at temperatures up to 300 °C in air and 480 °C in N 2 . , However, when noble metal NPs are added to enhance the hydrogenation performance via hydrogen spillover, ZIF-67 becomes vulnerable and goes through hydrogenolysis at much lower temperatures, since dissociated hydrogen is more reactive. , Therefore, the extent of the hydrogenolysis reaction of ZIF-67, which is paired up with metal NPs could serve as a reflection or indicator of the production of spillover hydrogen atoms at elevated temperatures. As a result, the relative hydrogen spillover ability of the studied metal NPs could be qualitatively determined with confidence.…”

“…16−19 Meanwhile, ZIF-67 preserves good thermal stability at temperatures up to 300 °C in air and 480 °C in N 2 . 4,20 However, when noble metal NPs are added to enhance the hydrogenation performance via hydrogen spillover, ZIF-67 becomes vulnerable and goes through hydrogenolysis at much lower temperatures, since dissociated hydrogen is more reactive. 4,21 Therefore, the extent of the hydrogenolysis reaction of ZIF-67, which is paired up with metal NPs could serve as a reflection or indicator of the production of spillover hydrogen atoms at elevated temperatures.…”

Characterizations and antibacterial activities of passion fruit peel pectin/chitosan composite films incorporated Piper betle L. leaf extract for preservation of purple eggplants

“…The majority of commercial pectin can be directly extracted from citrus peel, apple fruit and other plants [ 4 ]. Pectin is also extracted from other sources such as soybean hull [ 5 ], mango peel [ 6 ], sunflower head [ 7 ], banana peel [ 8 ], passion fruit peel [ 9 ], durian rind [ 10 ], grapefruit peel [ 11 ], and persimmon peel [ 12 ]. Due to its high capacity of gel formation, pectin is used as stabilizer, emulsifier, gelling and thickening agent.…”