Enhancement in visible light-responsive photocatalytic activity by embedding Cu-doped ZnO nanoparticles on multi-walled carbon nanotubes

Ahmad, Mahmood; Ahmed, Ejaz; Hong, Zhanglian; Jiao, Xiaoliang; Abbas, Talib R.; Khalid, N.R.

doi:10.1016/j.apsusc.2013.08.114

Cited by 124 publications

(44 citation statements)

References 53 publications

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“…Besides, the binding energy of O 1s region showed an increase up to 532.9 eV for NSAC as compared to 530.97 eV for pure NiO, as reported in the literature [63]. The increase in the binding energy may be due to the capture of Ni on carbon surface and the surface interaction between C at Ni atoms [64]. The high-resolution XPS spectra of the C 1s region is exhibited in Fig.…”

Section: Xps Analysismentioning

confidence: 74%

Synergy effect in the photocatalytic degradation of textile dyeing waste water by using microwave combustion synthesized nickel oxide supported activated carbon

Suresh¹,

Vijaya²,

Balasubramaniam³

et al. 2014

Desalination and Water Treatment

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A B S T R A C TNickel oxide nanoparticles supported activated carbon (NSAC) photocatalyst was successfully prepared using a cost-effective microwave irradiation method. The earned UV lightsensitive NSAC composites were characterized using powder X-ray diffraction, Fourier transform infrared spectroscopy, High-resolution scanning electron microscope with energydispersive X-ray analysis, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller surface area analyzer. Optical properties of NSAC composites were investigated using UVVis diffuse reflectance spectroscopy and photoluminescence spectroscopy, which exposed prolonged light absorption in UV light region and hold better charge separation capability, respectively, as compared to pure NiO. The photocatalytic activity was tested by the degradation of textile dye waste water (TDW) under UV light irradiation. Chemical oxygen demand of TDW was calibrated before and after the photocatalysis experiment under UV light to evaluate the mineralization of wastewater. The results demonstrated that NSAC composites showed imposing photocatalytic enrichment over pure NiO. The coordinated blending of the oxygen vacant sites, structural defects of NiO along with electron transmission capacity, and presence of surface oxygen on AC has led to the lasting light absorption, delayed charge recombination, and sustenance, which favor the enrichment of the photocatalytic activity of NSAC.

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Section: Xps Analysismentioning

confidence: 74%

Synergy effect in the photocatalytic degradation of textile dyeing waste water by using microwave combustion synthesized nickel oxide supported activated carbon

Suresh¹,

Vijaya²,

Balasubramaniam³

et al. 2014

Desalination and Water Treatment

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show abstract

“…[55,64] Moreover, the improved photocatalytic performance of ZnO-CNT results from improving dispersion of photocatalysts and increasing exposure of more active sites. [65] Because adsorbed CNT can alter the band structure of ZnO, CNT can also act as a photosensitizer to sensitize ZnO. For example, multi-walled CNT (MWCNT) modified ZnO exhibits visible light photoactivity for photodegradation of MB.…”

Section: Coupling Carbon Materialsmentioning

confidence: 99%

Enhanced Photocatalytic Performance of ZnO through Coupling with Carbon Materials

Qi¹,

Qi²,

Xie³

2017

General Chemistry

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Photocatalytic degradation of organic pollutants is an effective way to overcome environmental pollution. During the past few years, carbon materials have demonstrated great potential to improve photocatalytic performance of ZnO nanomaterials. This review will comment on recent developments of carbon materials (including fullerene, carbon nanotube, and graphene) coupling to improve photocatalytic performance of ZnO for photodegradatation of organic pollutants. The effects of carbon materials on enhancing photocatalytic performance of ZnO include enhancing structure stability, increasing amounts of active sites of pollutant adsorption, boosting electron acceptor formation and transport, enhancing photosensitization, narrowing band gap, etc. Moreover, basic mechanisms how carbon materials enhance photocatalytic activity of ZnO materials are discussed according to the interaction between ZnO and carbon materials. Finally, concluding remarks and current challenges are highlighted with perspectives for future developments of ZnO-based carbon photocatalysts. This review aims at recent research advances on ZnO-based carbon photocatalysts developed for photocatalysis of organic contaminant degradation.

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“…Previous studies have found that C QDs can enhance the photocatalytic activity under visible light irradiation [17]. Then Yang et al [18] and Ahmad et al [19] have prepared C/ZnO composites to improve photocatalytic property, Liu et al [20] have prepared C QDs/TiO 2 nanosheet to improve the visible light photocatalytic activity. Moreover, as known, photocatalytic property of ZnO nanomaterial intensely depends on the external morphology such as surface morphology, size or special three-dimensional structure, therefore, many studies have been made on the morphology controlled fabrication of ZnO to improve its photocatalysis.…”

Section: Introductionmentioning

confidence: 98%

The visible light catalytic properties of carbon quantum dots/ZnO nanoflowers composites

Zhang

Pan

Zhu

et al. 2015

J Mater Sci: Mater Electron

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Carbon quantum dots (C QDs)/ZnO nanoflowers composites were prepared via a simple technical route through which ZnO nanoflowers were prepared by electrospinning-hydrothermal synthesis and dispersed in C QDs solution, then dried at 80°C. The results indicated that ZnO nanoflowers were well combined with C QDs. The visible light photocatalytic activity of C QDs/ZnO nanoflowers coposite was investigated by degradation of Rhodamine B under visible light irradiation, and it is demonstrated that the photocatalytic performance of this composites was significantly enhanced compared with that of pure ZnO nanoflowers. Furthermore, the unique upconverted photoluminescence behaviour of the carbon dots and the novel 3-D structure of the ZnO were considered as the main reasons of this enhancement.

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Enhancement in visible light-responsive photocatalytic activity by embedding Cu-doped ZnO nanoparticles on multi-walled carbon nanotubes

Cited by 124 publications

References 53 publications

Synergy effect in the photocatalytic degradation of textile dyeing waste water by using microwave combustion synthesized nickel oxide supported activated carbon

Synergy effect in the photocatalytic degradation of textile dyeing waste water by using microwave combustion synthesized nickel oxide supported activated carbon

Enhanced Photocatalytic Performance of ZnO through Coupling with Carbon Materials

The visible light catalytic properties of carbon quantum dots/ZnO nanoflowers composites

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