Copper oxide-carbon nanotube (CuO/CNT) nanocomposite: Synthesis and photocatalytic dye degradation from colored textile wastewater

Double walled carbon nanotube (DWCNT)/N,Pd codoped TiO2 nanocomposites were prepared by a modified sol-gel method and characterised using FTIR, Raman spectroscopy, TGA, DRUV-Vis, XRD, SEM, and TEM analyses. TEM images showed unique pearl-bead-necklace structured morphologies at higher DWCNT ratios. The nanocomposite materials showed characteristic anatase TiO2 Raman bands in addition to the carbon nanotube D and G bands. Red shifts in the UV-Vis absorption edge were observed at low DWCNT percentages. The photocatalytic activity of DWCNT/N,Pd TiO2 nanocomposite was evaluated by the photocatalytic degradation of eosin yellow under simulated solar light irradiation and the 2% DWCNT/N,Pd TiO2 nanocomposite showed the highest photoactivity while the 20% DWCNT/N,Pd TiO2 hybrid was the least efficient. The photocatalytic enhancement was attributed to the synergistic effects of the supporting and electron channeling role of the DWCNTs as well as the electron trapping effects of the platinum group metal. These phenomena favour the separation of the photogenerated electron-hole pairs, reducing their recombination rate, which consequently lead to significantly enhanced photoactivity.

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Biofabrication, characterization and evaluation of photocatalytic dye degradation efficiency of Syzygium alternifolium leaf extract mediated copper oxide nanoparticles

Materials Research Express ◽

10.1088/2053-1591/ab0db9 ◽

2019 ◽

Vol 6 (6) ◽

pp. 065034 ◽

Cited By ~ 11

Author(s):

Pulicherla Yugandhar ◽

Thirumalanadhuni Vasavi ◽

Bhasha Shanmugam ◽

Palempalli Uma Maheswari Devi ◽

Kesireddy Sathyavelu Reddy ◽

...

Keyword(s):

Copper Oxide ◽

Leaf Extract ◽

Dye Degradation ◽

Copper Oxide Nanoparticles ◽

Degradation Efficiency ◽

Oxide Nanoparticles ◽

Photocatalytic Dye Degradation ◽

Syzygium Alternifolium

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Green synthesis of colloidal copper oxide nanoparticles using Carica papaya and its application in photocatalytic dye degradation

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy ◽

10.1016/j.saa.2013.12.020 ◽

2014 ◽

Vol 121 ◽

pp. 746-750 ◽

Cited By ~ 179

Author(s):

Renu Sankar ◽

Perumal Manikandan ◽

Viswanathan Malarvizhi ◽

Tajudeennasrin Fathima ◽

Kanchi Subramanian Shivashangari ◽

...

Keyword(s):

Copper Oxide ◽

Green Synthesis ◽

Carica Papaya ◽

Dye Degradation ◽

Copper Oxide Nanoparticles ◽

Oxide Nanoparticles ◽

Photocatalytic Dye Degradation

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Chemical Assembly of Copper Oxide and Single Walled Carbon Nanotubes for Enhanced Photocatalytic Dye Degradation under Solar Light Irradiation

Materials Proceedings ◽

10.3390/iocn2020-07790 ◽

2020 ◽

Vol 4 (1) ◽

pp. 18

Author(s):

Kamal Prasad Sapkota ◽

Md. Akherul Islam ◽

Md. Abu Hanif ◽

Jeasmin Akter ◽

Jae Ryang Hahn

Keyword(s):

Carbon Nanotubes ◽

Copper Oxide ◽

Photocatalytic Performance ◽

Dye Degradation ◽

Single Walled Carbon Nanotubes ◽

Photocatalytic Efficiency ◽

Single Walled Carbon ◽

Photocatalytic Dye Degradation ◽

Walled Carbon Nanotubes ◽

Better Than

We elaborate the synthesis and remarkable photocatalytic efficiency of a series of heterojunction nanocomposites with a cauliflower-like architecture composed of copper oxide (CuO) and single-walled carbon nanotubes (SWCNTs). The photocatalysts with such a peculiar design were constructed via facile recrystallization followed by calcination and were symbolized as CuO-SWCNT-1, CuO-SWCNT-2, and CuO-SWCNT-3, representing the components and calcination time in hours. The photocatalytic efficiency of the synthesized nanocomposite samples were investigated by evaluating the decomposition of methylene blue (MB) solution under natural sunlight exposure. All of the as-synthesized photocatalysts were substantially effectual for the photo-deterioration of MB solution. Moreover, CuO-SWCNT-3 revealed the top photocatalytic capability with 96% decomposition of MB solution in 2 h while being exposed to visible light. Pristine CuO nanocrystals and the SWCNTs were employed as controls, whereas the photocatalytic performance of the hetero-composites was significantly better than that of pure CuO as well as SWCNTs. The recyclability of the photocatalysts was also explored, and the results asserted that the samples could be reused for five cycles without being altered notably in photocatalytic performance or morphology.

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