Enhanced Visible-Light Photocatalysis of Nanocomposites of Copper Oxide and Single-Walled Carbon Nanotubes for the Degradation of Methylene Blue

Sapkota, Kamal Prasad; Lee, Insup; Hanif, Md. Abu; Islam, Md. Akherul; Akter, Jeasmin; Hahn, Jong Hoon

doi:10.3390/catal10030297

Cited by 56 publications

(37 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The photogenerated •OH, •O 2− , and h + are three typical active species for the degradation of pollutants during the photocatalytic reactions [47,48]. To investigate the mechanisms of the photocatalytic process involving N,Fe-CDs/G-WO 3 -0.6, various scavengers were used to analyze the active species under visible light.…”

Section: Photocatalytic Performancementioning

confidence: 99%

N,Fe-Doped Carbon Dot Decorated Gear-Shaped WO3 for Highly Efficient UV-Vis-NIR-Driven Photocatalytic Performance

Yan

Wang

et al. 2020

Catalysts

View full text Add to dashboard Cite

The development of efficient and non-toxic photocatalysts with a full spectrum response is a primary strategy in the area of photocatalytically mediated pollutant elimination. Herein, we report the preparation of novel nitrogen and iron co-doped carbon dots/gear-shaped WO3 (N,Fe-CDs/G-WO3) with significantly improved broad-spectrum utilization. Characterization results demonstrated that the gear-shaped G-WO3, decorated by N,Fe-CDs with excellent electron transfer/reservoir properties, possessed abundant oxygen vacancies, had large specific surface areas, had multiple light-reflections and had a narrow band gap. As a result, the N,Fe-CDs/G-WO3 composite exhibited excellent photocatalytic activity towards the degradation of water contaminants under full spectrum irradiation. For example, the photodegradative efficiencies of rhodamine B (RhB) reached 81.4%, 97.1%, and 75% in 2 h, under ultraviolet, visible, and near-infrared (UV, vis, and NIR) light irradiation, respectively. Moreover, the N,Fe-CDs/G-WO3 composite also exhibited an outstanding photocatalytic degradation efficiency for other dyes, pharmaceuticals, and personal care products (PPCPs) like methylene blue (MB), ciprofloxacin (CIP), tetracycline hydrochloride (TCH), and oxytetracycline (OTC) (91.1%, 70.5%, 54.5%, and 47.8% in 3 h, respectively). The radical trapping experiments indicated that h+ and ·OH were the main reactive oxidative species (ROS), and the conversion between Fe (III) and Fe (II) played a key role in the photocatalytic reactions. Such a N,Fe-CD decorated material with brilliant photocatalytic activity has tremendous potential for application in environmental remediation.

show abstract

Section: Photocatalytic Performancementioning

confidence: 99%

N,Fe-Doped Carbon Dot Decorated Gear-Shaped WO3 for Highly Efficient UV-Vis-NIR-Driven Photocatalytic Performance

Yan

Wang

et al. 2020

Catalysts

View full text Add to dashboard Cite

show abstract

“…Photocatalysis is regarded as one of the most promising approaches due to its capability to engender robust radicals in waterborne media by light irradiation; these radicals successively neutralize persistent pollutants thoroughly [ 6 ]. Low operational costs, facile reachability, outstanding performance, and potent action even in prevailing conditions of environment are additional advantages associated with photocatalysis [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, CuO exhibits a contracted bandgap energy range from 1.2 to 2.6 eV; its particular bandgap energy is determined by the fabrication conditions. It comprises of p -type semiconductivity owing to the presence of oxygen vacancy defects [ 7 ]. In addition to its forefront application in photocatalysis, CuO has also been used in sundry technologies such as batteries, optoelectronics, gas detection, high-temperature superconductors, and heterogeneous catalysts [ 8 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Nanocauliflower Chemical Assembly Composed of Copper Oxide and Single-Walled Carbon Nanotubes for Enhanced Photocatalytic Dye Degradation

et al. 2021

Self Cite

View full text Add to dashboard Cite

We present the fabrication and proficient photocatalytic performance of a series of heterojunction nanocomposites with cauliflower-like architecture synthesized from copper(II) oxide (CuO) nanocrystals and carbon nanotubes with single walls (SWCNTs). These unique photocatalysts were constructed via simplistic recrystallization succeeded by calcination and were labeled as CuOSC-1, CuOSC-2, and CuOSC-3 (representing the components; CuO and SC for SWCNTs, and the calcination time in hours). The photocatalytic potency of the fabricated nanocomposites was investigated on the basis of their capability to decompose methylene blue (MB) dye under visible-light irradiation. Every as-synthesized nanocomposite was effective photocatalyst for the photodecomposition of an MB solution. Moreover, CuOSC-3 exhibited the best photocatalytic activity, with 96% degradation of the visible-light irradiated MB solution in 2 h. Pure CuO nanocrystals generated through the same route and pure SWCNTs were used as controls, where the photocatalytic actions of the nanocomposite samples were found to be remarkably better than that of either the pure CuO or the pure SWCNTs. The recycling proficiency of the photocatalysts was also explored; the results disclosed that the samples could be applied for five cycles without exhibiting a notable change in photocatalytic performance or morphology.

show abstract

“…That is why a variety of practical strategies have been implemented to develop viable water treatment technologies such as biological methods, photocatalysis, coagulation-flocculation, and membrane processes, among others [3,4]. Of these strategies, photocatalysis represents an excellent alternative for dye degradation due to its simplicity, low toxicity, and high efficiency [5,6].…”

Section: Introductionmentioning

confidence: 99%

SnO2 nanoparticles synthesized with Citrus aurantifolia and their performance in photocatalysis

Luque¹,

Nava²,

Soto-Robles

et al. 2020

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

This research presents an alternative tin oxide (SnO 2) nanoparticles synthesis method using different concentrations of Citrus aurantifolia peel extract as reducing agent. We report the chemical identification protocol for polyphenols in the peels via FTIR, the characterization of the SnO 2 nanoparticles by FTIR, XRD, HRTEM, and UV-vis. The SnO 2 nanoparticles presented the Sn-O-Sn bond at 640 cm −1 and crystal growth with a clearly tetragonal structure. Depending on the amount of extract used, hemispherical nanoparticles of different sizes (5-12 nm) and band gap values ranging from 3.02 to 3.44 eV were obtained. Photocatalytic degradation studies of the synthesized SnO 2 were carried out using methylene blue under UV light. The sample with 4% extract of C. aurantifolia showed a degradation rate of about 96% at 120 min. The use of C. aurantifolia as a reducing agent in the synthesis of SnO 2 nanoparticles helps the properties and has control over the morphology of the nanoparticles.

show abstract

Enhanced Visible-Light Photocatalysis of Nanocomposites of Copper Oxide and Single-Walled Carbon Nanotubes for the Degradation of Methylene Blue

Cited by 56 publications

References 28 publications

N,Fe-Doped Carbon Dot Decorated Gear-Shaped WO3 for Highly Efficient UV-Vis-NIR-Driven Photocatalytic Performance

N,Fe-Doped Carbon Dot Decorated Gear-Shaped WO3 for Highly Efficient UV-Vis-NIR-Driven Photocatalytic Performance

Hierarchical Nanocauliflower Chemical Assembly Composed of Copper Oxide and Single-Walled Carbon Nanotubes for Enhanced Photocatalytic Dye Degradation

SnO2 nanoparticles synthesized with Citrus aurantifolia and their performance in photocatalysis

Contact Info

Product

Resources

About