Graphitic carbon nitride engineered α-Fe2O3/rGO heterostructure for visible-light-driven photochemical oxidation of sulfamethoxazole

Amorphous FeOOH Anchored on Boron and Nitrogen Codoped Carbon Nanotubes for Fenton-like Oxidation of Sulfamethoxazole

“…UHPLC chromatograms of the samples were acquired to explore the possible degradation pathways of SMX under the FeOOH∼5@BNG/H 2 O 2 catalytic system (Figure S5). At first, the pure SMX peak was observed at a retention time ( t R ) of 1.40 min . After the addition of H 2 O 2 , three new peaks emerged at t R of 0.85, 1.31, and 2.66 min, and are ascribed to the possible reaction intermediates of I 1 , I 2 , and I 3 , respectively.…”

“…At first, the pure SMX peak was observed at a retention time (t R ) of 1.40 min. 67 After the addition of H 2 O 2 , three new peaks emerged at t R of 0.85, 1.31, and 2.66 min, and are ascribed to the possible reaction intermediates of I 1 , I 2 , and I 3 , respectively. Owing to its structural complexity, SMX usually follows a series of well-reported reaction intermediates during its degradation process.…”

A metal–organic framework modulated to site-isolate Cl˙ pendants via radical inter-conversion for degrading hard-to-ionize aqueous organic wastes

“…Therefore, acetaminophen, sulfanilamide, and sulfamethoxazole (SMX) were selected as representative hard-to-decompose pharmaceutical compounds, considering the inclusion of amine functionalities, severe toxicities post release into water resources, and the distinct energies needed for ionization via e − loss (ionization potential: IP) with an aim to reaffirm that Clc SUP can initiate the radicalization of pharmaceutical compounds primarily via the e − transfer route. 107,[110][111][112] Aniline was also used as a reactant for comparison with the pharmaceutical compounds using the −r PHARMA,0,LA values of the MOFs, whose denition is the number of moles of aniline (or pharmaceutical compound) consumed per LA site and per unit time (eqn (S19 †)).…”

“…Aniline and the pharmaceutical compounds were then subjected to degradation on the MOFs under identical environments to those used to conduct the scavenging runs except for excluding the scavengers and reducing the amount of a reactant from 0.1 mmol to 0.007 mmol due to the low aqueous solubilities of sulfanilamide and SMX. [111][112][113][114] It was expected to be more arduous for UiO-66-Cl to remove e − from a reactant with a higher IP 107 and that the −r PHARMA,0,LA values should decrease in the order of acetaminophen (IP of 7.4 eV) > aniline (IP of 7.7) > sulfanilamide (IP of 8.2) > SMX (IP of 8.9), if UiO-66-Cl radicalized the reactants via the e − transfer route. Interestingly, UiO-66-Cl displayed comparable −r PHARMA,0,LA values in degrading acetaminophen and aniline, despite the former possessing a lower IP than the latter (Fig.…”

Photocatalytic generation of H2O2 over a Z-scheme Fe2O3@C@1T/2H-MoS2 heterostructured catalyst for high-performance Fenton reaction

“…Fe 2 O 3 is an efficient catalyst in the Fenton reaction and a well-studied semiconductor in photocatalysis. 14,15 In general, three key points of the photocatalytic heterojunction are related to H 2 O 2 production: light absorption, charge transfer, and surface catalytic reaction. 16–18 According to the band structure and charge transfer pathway, heterojunctions could be divided into several categories, in which type-II and Z-scheme heterojunctions are the most attractive.…”