In an article, author is Liu, Yong, once mentioned the application of 14347-78-5, Name is (R)-(2,2-Dimethyl-1,3-dioxolan-4-yl)methanol, molecular formula is C6H12O3, molecular weight is 132.1577, MDL number is MFCD00003213, category is copper-catalyst. Now introduce a scientific discovery about this category, Category: copper-catalyst.
Fenton-like degradation of sulfamethoxazole in Cu-0/Zn-0-air system over a broad pH range: Performance, kinetics and mechanism
In this study, a bimetallic Cu-0/Zn-0 particles were prepared, characterized and used as Fenton-like catalyst for the degradation of sulfamethoxazole (SMX). The results showed that Cu-0/Zn-0 particles were capable of converting O-2 to H2O2, center dot O-2(-) and %OH radicals. In bimetallic Cu-0/Zn-0 particles, Cu-0/Zn-0 corrosion cells were formed through the direct contact of Zn-0 and Cu-0, which not only accelerated the electron transfer from Zn-0 to O-2, leading to the promotion of H2O2 generation, but also enhanced the conversion of Cu2+ to Cu+/Cu-0, facilitating the catalytic decomposition of H2O2 to produce center dot O-2(-) and %OH radicals. SMX could be efficiently degraded in Cu-0/Zn-0-air system over a broad pH range from 3 to 9, the removal efficiency of SMX and TOC was 87.8% and 45.5%, respectively at following condition: SMX concentration, 20 mg/L; dosage of bimetallic Cu-0/Zn-0 particles (mole ratio of Zn to Cu was 1:2), 2 g/L; air flow rate, 1.8 L/min; reaction temperature, 25. and without adjusting pH. The recycling use of bimetallic Cu-0/Zn-0 particles leaded to the enhanced degradation of SMX due to the newly formed cuprous oxide (Cu2O), which could further catalytically activate O-2. The quenching experiment showed that the concentration of dissolved oxygen could significantly affect the main reactive oxidant species (ROSs). Additionally, the intermediate products of SMX degradation were detected and a possible pathway of SMX degradation as well as the catalytic mechanism of Cu-0/Zn-0-air system were proposed.
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Reference:
Copper catalysis in organic synthesis – NCBI,
,Special Issue “Fundamentals and Applications of Copper-Based Catalysts”