Amino-functionalized synthesis of MnO2-NH2-GO for catalytic ozonation of cephalexin

Xu, Jie; Yu, Li; Qian, Mengqian; Pan, Jian; Ding, Jia; Guan, Baohong

doi:10.1016/j.apcatb.2019.117797

Cited by 48 publications

(15 citation statements)

References 45 publications

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“…This decoupling was attributed to the weak electrostatic interaction or physical absorption between 2D MnO 2 and GO, which was not able to resist against the shearing and scouring force of the fluid. 99 However, 2D MnO 2 nanocrystals were not decoupled from GO in the case of MnO 2 -NH 2 -GO hybrid due to strong covalent bonds between the components (Figure 8f).…”

Section: Functionalization Of 2d Tmosmentioning

confidence: 99%

“…It also was observed that 2D MnO 2 nanocrystals were decoupled from GO gradually after a second or third round of operation, in the case of MnO 2 -GO hybrid, which decreased the ozonation efficiency. This decoupling was attributed to the weak electrostatic interaction or physical absorption between 2D MnO 2 and GO, which was not able to resist against the shearing and scouring force of the fluid . However, 2D MnO 2 nanocrystals were not decoupled from GO in the case of MnO 2 -NH 2 -GO hybrid due to strong covalent bonds between the components (Figure f).…”

Section: Functionalization Of 2d Tmos Nanomaterialsmentioning

confidence: 99%

“…98 Hence, in order to enhance their catalytic performance, 2D TMOs could be functionalized with suitable organic molecules which will be able to speed up the electron transfer and help in generating more free radicals. In this context, Xu et al 99 fabricated a catalyst based on amino functionalized 2D manganese dioxide (MnO 2 ) and graphene oxide (GO) hybrid (MnO 2 -NH 2 -GO) for catalytic ozonation of cephalexin (CLX). 2D MnO 2 was chosen generally because of its structural stability and environmental friendliness.…”

Section: Functionalization Of 2d Tmosmentioning

confidence: 99%

See 2 more Smart Citations

Surface Functionalization of 2D Transition Metal Oxides and Dichalcogenides via Covalent and Non-covalent Bonding for Sustainable Energy and Biomedical Applications

Azadmanjiri

Kumar

Srivastava

et al. 2020

ACS Appl. Nano Mater.

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The interest in two-dimensional (2D) nanomaterials has been increased rapidly after the discovery of graphene. The 2D graphene analogs (2DGAs) with ultrathin-layered feature exhibit a unique property which their bulk counterparts cannot possess. Among various 2D nanomaterials, the transition metal dichalcogenides (TMDs) and transition metal oxides (TMOs) have attracted considerable attention from scientific communities. The availability of various transition metals and their binding states in 2D TMDs and TMOs enable them to show a wide spectrum of properties such as metals to wide band gap semiconductors. Although properties of 2D TMDs and TMOs are excellent, further enhancement of their properties is still required for cutting-edge applications. The surface functionalization of 2DGAs is a potential route for enhancing their properties. The surfaces of 2D TMDs and TMOs could be functionalized with various types of organic or inorganic nanomaterials via covalent or non-covalent interactions. The functionalization may alter the Fermi level of 2D nanomaterials, also having this potential to add extra functionalities to the basis of the fabricated devices using them. In this review, we first introduce and specify the characteristics of 2D TMDs and TMOs as two important 2DGAs. Then, we discuss their limitations and how surface functionalization may enhance their performance. The covalent and non-covalent modes of surface functionalization with organic and inorganic nanomaterials on both 2D TMDs and TMOs are then considered. The current state and challenge of the functionalized 2D TMDs and TMOs are also discussed by their application point of view in energy storage and conversion, sensing, biomedical, catalytic combustion, and (opto)electronic devices.

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Section: Functionalization Of 2d Tmosmentioning

confidence: 99%

Section: Functionalization Of 2d Tmos Nanomaterialsmentioning

confidence: 99%

Section: Functionalization Of 2d Tmosmentioning

confidence: 99%

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Surface Functionalization of 2D Transition Metal Oxides and Dichalcogenides via Covalent and Non-covalent Bonding for Sustainable Energy and Biomedical Applications

Azadmanjiri

Kumar

Srivastava

et al. 2020

ACS Appl. Nano Mater.

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“…186,187 Given that the hybrid structure of MnO 2 -GO was not stable enough because of the weak physical adsorption and electrostatic interaction between MnO 2 and GO, Xu et al synthesized a novel structured catalyst via amino-functionalizing the hybrids of MnO 2 and GO (MnO 2 -NH 2 -GO). 188 The amino-functionalization endowed MnO 2 -NH 2 -GO higher stability than MnO 2 -GO via strengthening the covalent bonding between MnO 2 and GO to prevent their decoupling. The formed strong covalent bonds bridged by NH 2 would accelerate the charge transfer.…”

Section: Carbon-based Nanocompositesmentioning

confidence: 99%

Carbocatalytic ozonation toward advanced water purification

Chen

Duan

et al. 2021

J. Mater. Chem. A

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“…La CEF es un antibiótico sistémico empleado para tratar enfermedades respiratorias, urinarias e infecciones ligeras en tejidos blandos causadas por bacterias [5]. La presencia de antibióticos como la CEF en los cuerpos de agua, se debe a la descarga de aguas residuales domésticas, hospitalarias y aguas residuales de la industria farmacéutica [6]. En la actualidad, los sistemas de tratamiento convencionales no presenta una adecuada eficiencia para remover compuestos tales como la CEF [7].…”

Section: Introductionunclassified

Evaluación de la reducción de la concentración de cefalexina en solución acuosa por electrocoagulación con electrodos de grafito a diferentes valores de pH inicial e intensidad de corriente aplicada

Ramírez

Ávila

Valencia

et al. 2021

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Esta investigación se llevó a cabo para evaluar la reducción de la concentración de cefalexina (CEF), en solución acuosa por medio de electrocoagulación (EC) con electrodos de grafito como alternativa de eliminación de este contaminante en las aguas residuales. En primer lugar, se ajustó la conductividad eléctrica del agua con NaCl, lo que permitió la formación de especies de cloro activo (HOCl y OCl-). Se emplearon electrodos de grafito debido a sus características frente al desgaste del ánodo, que ocurre con los sistemas en los cuales se emplean ánodos metálicos. Se analizó el efecto del pH inicial de la solución (7 y 8) y la intensidad de corriente aplicada (1 A y 1,5 A). Para evaluar el efecto de estas variables, se implementó un diseño experimental de tipo central compuesto y la metodología de superficie de respuesta. Adicionalmente, se determinó las condiciones de las variables de estudio las cuales permiten alcanzar la mayor efectividad del proceso. Se determinó que a un nivel de pH 7 y una intensidad de 1,5 A se alcanza una remoción del 75,5 % en la concentración de cefalexina. Para un pH 8 se observa una considerable disminución del porcentaje de reducción de concentración de cefalexina, esta situación implica que la variable que presenta mayor influencia sobre la variable de respuesta es el pH de la solución acuosa.

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Amino-functionalized synthesis of MnO2-NH2-GO for catalytic ozonation of cephalexin

Cited by 48 publications

References 45 publications

Surface Functionalization of 2D Transition Metal Oxides and Dichalcogenides via Covalent and Non-covalent Bonding for Sustainable Energy and Biomedical Applications

Surface Functionalization of 2D Transition Metal Oxides and Dichalcogenides via Covalent and Non-covalent Bonding for Sustainable Energy and Biomedical Applications

Carbocatalytic ozonation toward advanced water purification

Evaluación de la reducción de la concentración de cefalexina en solución acuosa por electrocoagulación con electrodos de grafito a diferentes valores de pH inicial e intensidad de corriente aplicada

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