Objective Findings on the K-Doped g-C3N4 Photocatalysts : The Presence and Influence of Organic Byproducts on K-Doped g-C3N4 Photocatalysis

The thermal-condensation method is widely used for the synthesis of K-doped g-C3N4 photocatalysts, but the presence of organic byproducts in the resultant products is often overlooked in previous reports. Here, we demonstrated the universal presence of organic byproducts in K-doped g-C3N4 synthesize...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1985. - 37(2021), 16 vom: 27. Apr., Seite 4859-4868
1. Verfasser: Liu, Binyao (VerfasserIn)
Weitere Verfasser: Nie, Xiaoqin, Tang, Yi, Yang, Shan, Bian, Liang, Dong, Faqin, He, Huichao, Zhou, Yong, Liu, Kun
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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245 1 0 |a Objective Findings on the K-Doped g-C3N4 Photocatalysts  |b The Presence and Influence of Organic Byproducts on K-Doped g-C3N4 Photocatalysis 
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520 |a The thermal-condensation method is widely used for the synthesis of K-doped g-C3N4 photocatalysts, but the presence of organic byproducts in the resultant products is often overlooked in previous reports. Here, we demonstrated the universal presence of organic byproducts in K-doped g-C3N4 synthesized by typical thermal condensation of KOH/melamine, KOH/dicyandiamide, or KOH/urea. Taking the K-doped g-C3N4 photocatalysis for the degradation of dimethyl phthalate as an example, the negative influence of the organic byproducts on K-doped g-C3N4 photocatalysis was confirmed. Specifically, the organic byproducts can be gradually dissolved into the photocatalytic system of K-doped g-C3N4 as new and stable pollutants. Based on the solubility investigations on the byproducts in several solvents, hot-water washing was demonstrated to be a relatively effective approach to remove the organic byproducts from K-doped g-C3N4. The formation of organic byproducts during the synthesis of K-doped g-C3N4 could be ascribed to the fact that the presence of K salts in melamine, dicyandiamide, or urea molecules results in their insufficient thermal condensation into expected g-C3N4. The present work provides objective information about the K-doped g-C3N4 photocatalysts and reminds researchers about the influence of the organic byproducts on the applications of the other impurity-doped g-C3N4 photocatalysts 
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700 1 |a Nie, Xiaoqin  |e verfasserin  |4 aut 
700 1 |a Tang, Yi  |e verfasserin  |4 aut 
700 1 |a Yang, Shan  |e verfasserin  |4 aut 
700 1 |a Bian, Liang  |e verfasserin  |4 aut 
700 1 |a Dong, Faqin  |e verfasserin  |4 aut 
700 1 |a He, Huichao  |e verfasserin  |4 aut 
700 1 |a Zhou, Yong  |e verfasserin  |4 aut 
700 1 |a Liu, Kun  |e verfasserin  |4 aut 
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