l-Ascorbic acid oxygen-induced micro-electronic fields over metal-free polyimide for peroxymonosulfate activation to realize efficient multi-pathway destruction of contaminants

Abstract

Efficient multi-pathway destruction of pollutants is realized over metal-free OVc-CNOP Nfs by PMS activation.

Carbonized MOF-Coated Zero-Valent Cu Driving an Efficient Dual-Reaction-Center Fenton-like Water Treatment Process through Utilizing Pollutants and Natural Dissolved Oxygen

“…The D and G bands attributed to the C characteristic peak of the catalyst were clearly affected after the adsorption of the contaminants. A larger I D / I G ration corresponds to an increase in the number of defects, , indicating that BPA is adsorbed on the C center; this is consistent with the DFT calculations. After the Fenton reaction, the ratio returns to the value before the reaction, which proves that the pollutants adsorbed on the electron-poor C­(π) center are gradually degraded.…”

Efficient Decomposition of Organic Pollutants over nZVI/FeOx/FeNy-Anchored NC Layers via a Novel Dual-Reaction-Centers-Based Wet Air Oxidation Process under Natural Conditions

“…A broad diffraction peak of GP@CN was observed at 24.7°, which corresponded to the diffraction peak of the (002) crystal plane of amorphous carbon. 21 After introducing Fe species, a series of prominent diffraction peaks were observed at 35.5°, 40.0°, and 44.7°, which are related to the (311) plane Fe 3 O 4 (PDF 88-0315), (113) plane α-Fe 2 O 3 (PDF 33-0664), 31 and (110) plane Fe 0 (PDF 87-0721), 32,34 respectively, which are consistent with the HRTEM results above. The continuous diffraction peaks in the range 41.0−44.0°contain the Fe 2 N (PDF 76-0090) and Fe 3 N species (PDF 73-2101).…”

“…The direct oxidation of organic pollutants by O 2 is often kinetically unfavorable due to the weak oxidation ability of the triplet state of O 2 , which is relatively stable under environmental conditions. Our recent studies have found that the construction of dual-reaction-centers (DRCs), including electron-rich microcenters (ERCs) and electron-poor microcenters (EPCs), on the catalyst surface can greatly induce surface electron transfer and realize the selective reduction of H 2 O 2 , reducing resource and energy consumption and breaking the pH limit. − In particular, microactivation (one-electron reduction) of dissolved oxygen (DO) was also observed under natural conditions in an enhanced DRC system based on a Cu-doped graphite polyimide catalyst . The electrons of the pollutants were induced through the DRC-interfacial reaction and finally utilized by DO and H 2 O 2 , realizing the efficient dual-pathway degradation of pollutants.…”

Preparation and optimization of thermosensitive hydrogels for inhibiting coal oxidation

“…The dienol structure of VC exhibits strong reducibility. It can hamper the oxidation of active groups and interrupt the chain reaction during coal oxidation 44,45 . Meanwhile, the MC‐PEG‐SDS solution acts as a VC delivery system, and sol‐gel transition occurs when the temperature is higher than LCST.…”

“…It can hamper the oxidation of active groups and interrupt the chain reaction during coal oxidation. 44,45 Meanwhile, the MC-PEG-SDS solution acts as a VC delivery system, and sol-gel transition occurs when the temperature is higher than LCST. Subsequently, VC is wrapped in gel, which avoids VC failure at high temperature and prolongs its release activity.…”