Novel photocatalytic performance of nanocage-like MIL-125-NH₂ induced by adsorption of phenolic pollutants

Abstract

The present work elucidates that the photocatalytic activity of nanocage-like MIL-125-NH2 is enhanced by adsorption of an electron-withdrawing pollutant (p-nitrophenol) but suppressed by adsorption of an electron-donating pollutant (p-methylphenol).

Engineering Homochiral MOFs in TiO2 Nanotubes as Enantioselective Photoelectrochemical Electrode for Chiral Recognition

“…This phenomenon can be attributed to the positively charged N + group in the carnitine molecule. 53 Benefiting from the electrostatic interaction between negative SO 3 2− and positive carnitine, more SO 3 2− ions (electron donors) reach the surface of the PEC platform and react with photogenerated holes. The results indicate that the as-proposed TiO 2 /MIL-125-NH-L-His NTs have good enantioselectivity and can be utilized as a universal platform with high sensitivity for chiral recognition.…”

“…Notably, unlike DOPA, lactic acid, and tryptophan, the photocurrents recorded for carnitine enantiomers show a reverse change, the photocurrents clearly increased after the l -/ d -carnitine recognition. This phenomenon can be attributed to the positively charged N + group in the carnitine molecule . Benefiting from the electrostatic interaction between negative SO 3 2– and positive carnitine, more SO 3 2– ions (electron donors) reach the surface of the PEC platform and react with photogenerated holes.…”

Recent Advances of Photocatalytic Application in Water Treatment: A Review

“…It should be noted that during the degradation of p-chlorophenol, the electrophilic and nucleophilic properties of • O2 − occur simultaneously, resulting in the highest degradation rate. It was proposed that the photocatalytic activity of nanocage-like MIL-125-NH2 was enhanced by the adsorption of electron-absorbing pollutants and were inhibited by the adsorption of electron-donating pollutants, which provided a reasonable research basis for the photocatalytic degradation of phenolics by MOF materials (Figure 4) [47]. A large number of studies have currently focused on improving photocatalytic efficiency through the preparation and modification of catalytic materials.…”

“…Figure 4. Schematic of the electron-density-induced structure-performance relationship between phenolic molecules and NC-MIL-125-NH 2 in adsorption-photocatalysis[47]. Copyright, 2020 Royal Society of Chemistry.…”

Synthesis and environmental applications of defective metal organic frameworks

“…作为一种新型 材料, 金属有机骨架(metal organic frameworks, MOFs) 也不例外. MOFs是一类由金属离子或金属簇构成的金 属中心与有机配体通过自组装方式相连接, 形成拥有 周期性结构的多孔晶态材料 [4] . 1995年, Yaghi和Li [5] 通 过水热法合成了Cu(4,4′-bpy) 1.…”