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Conventional Fenton reaction for the pollutant removal is restricted by incomplete HO decomposition due to the low efficient Fe(III)/Fe(II) cycle. In this study, the co-catalytic Fenton processes with g-CN and the roles of potassium doping in the diverse mechanisms were comprehensively investigated. The degradation rate of enrofloxacin (ENR) in g-CN-3.9 %K/Fe(III)/HO was 204 times higher than that in conventional Fenton reaction. This significant enhancement was ascribed to the readily formed complex between Fe(III) and K doped g-CN The K doping facilitated the transfer of photoexcited e from g-CN-3.9 %K surface to Fe(III), leading to an accelerated Fe(III) reduction to Fe(II). In addition, this complex was coordinated and oxidized by HO, resulting in the formation of Fe(V) which quickly degraded ENR. Without K doping, on the other hand, only O dominated the degradation of ENR in g-CN/Fe(III)/HO due to the lack of Fe(III) complexation. This study provides a new perspective for regulating the transfer directions of the photoexcited e with K doping in g-CN/Fenton coupled catalytic system for water purification.
This article was published in the following journal.
Name: Journal of hazardous materials
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RNA that has catalytic activity. The catalytic RNA sequence folds to form a complex surface that can function as an enzyme in reactions with itself and other molecules. It may function even in the absence of protein. There are numerous examples of RNA species that are acted upon by catalytic RNA, however the scope of this enzyme class is not limited to a particular type of substrate.
Lasers which use a solid, as opposed to a liquid or gas, as the lasing medium. Common materials used are crystals, such as YAG (YTTRIUM aluminum garnet); alexandrite; and CORUNDUM, doped with a rare earth element such as a NEODYMIUM; ERBIUM; or HOLMIUM. The output is sometimes additionally modified by addition of non-linear optical materials such as potassium titanyl phosphate crystal, which for example is used with neodymium YAG lasers to convert the output light to the visible range.
Stable potassium atoms that have the same atomic number as the element potassium, but differ in atomic weight. K-41 is a stable potassium isotope.
A subclass of symporters that specifically transport SODIUM CHLORIDE and POTASSIUM CHLORIDE across cellular membranes in a tightly coupled process.
A genetic process by which the adult organism is realized via mechanisms that lead to the restriction in the possible fates of cells, eventually leading to their differentiated state. Mechanisms involved cause heritable changes to cells without changes to DNA sequence such as DNA METHYLATION; HISTONE modification; DNA REPLICATION TIMING; NUCLEOSOME positioning; and heterochromatization which result in selective gene expression or repression.