Photocatalytic degradation of indigo carmine using Nd-doped TiO2-decorated graphene oxide nanocomposites

Oppong, Samuel Osei-Bonsu; Anku, William Wilson; Shukla, Sudheesh K.; Agorku, Eric Selorm; Govender, Penny Poomani

doi:10.1007/s10971-016-4062-8

Cited by 50 publications

(7 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Nddoped ZnO-MWCNTs composites showed better photocatalytic performance due to the increase in the number of impurity energy levels between the CB and VB which helps for the generation of more e − − h + pairs, decrease recombination of photogenerated holes and electrons in ZnO. The empty orbitals of Nd acted as a sink for electrons which prevented electron-hole recombination [12] while the MWCNTs released electrons onto the CB of the ZnO leading to the enhanced photodegradation performance of the composite [13].…”

Section: Proposed Photocatalytic Degradation Mechanism Of the Nd-zno-mwcnts Photocatalystmentioning

confidence: 99%

“…Doping of semiconductors with Lanthanide ions has been identified to minimise the rate of recombination of charge carries though the creation of charge carrier space regions on the metal oxide or entrapment of the excited electrons [11]. Metal dopants are also known to decrease the band gap of metal oxides with the subsequent improvement in their visible light utilization [12,13] which is a requirement for an efficient photocatalytic activity. For example, neodymium (Nd) doping of TiO 2 has been recognised as a feasible technique for augmenting its photocatalytic activity where the Nd acts as an electron sink and thus prevented the rate at which the generated electrons and holes recombine.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

MWCNTs attached neodymium doped-ZnO photocatalysts for efficient removal of dyes from wastewater

et al. 2020

Self Cite

View full text Add to dashboard Cite

The present study involves the synthesis of neodymium-doped zinc oxide nanoparticles decked multiwalled carbon nanotubes (Nd-ZnO-MWCNTs) with different weight percentage compositions of Nd through the co-precipitation method. The synthesized photocatalysts were utilized in photocatalytic removal of acid blue 40 and eosin Y dye solutions via visible light irradiation. The influence of catalyst dose and dye concentrations on the degradation efficiency was also studied. The catalysts were characterized using XRD, FTIR, BET surface area analysis, UV-Vis and TEM spectroscopies. TEM revealed that the Nd-ZnO nanoparticles were well distributed on the MWCNTs surface. XRD analysis showed that the ZnO occurred in the wurtzite phase. The introduction of Nd and MWCNTs reduced the band gap of ZnO from 3.2 to 2.7 eV resulting in its enhanced visible light absorption. All the modified ZnO photocatalysts degraded the dye at higher efficiencies compared to the bare ZnO with 0.6% Nd-ZnO-MWCNTs being the most effective. The bare ZnO degraded 13% of acid blue 40 dye while 0.6% Nd-ZnO-MWCNTs exhibited 99% degradation efficiency. The synergistic effect of Nd and MWCNTs was identified to be responsible for the enhanced efficiency of the Nd-ZnO-MWCNTs photocatalysts.

show abstract

Section: Proposed Photocatalytic Degradation Mechanism Of the Nd-zno-mwcnts Photocatalystmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

MWCNTs attached neodymium doped-ZnO photocatalysts for efficient removal of dyes from wastewater

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…In comparison to ZnO, nanocomposite [Nd–ZnO–GO (0.3% of Nd)] demonstrated higher photocatalytic efficiency and could be regarded for promise as a photocatalyst in organic wastewater treatment. Samuel Osei-Bonsu Oppong et al [ 33 ] The photodegradation efficiency of indigo carmine solutions exposed to simulated solar light for 3 h with Nd–TiO 2 –GO (0.6 percent Nd) nanocomposites was found to be 92 percent. Umair Alam et al [ 34 ] showed that the Nd-doped ZnO is the best activity with 98% degradation efficiency compared used other rare earth metals.…”

Section: Resultsmentioning

confidence: 99%

The Photocatalytic Performance of Nd2O3 Doped CuO Nanoparticles with Enhanced Methylene Blue Degradation: Synthesis, Characterization and Comparative Study

et al. 2022

View full text Add to dashboard Cite

The growth of the textile industry results in a massive accumulation of dyes on water. This enormous rise in pigments is the primary source of water pollution, affecting the aquatic lives and our ecosystem balance. This study aims to notify the fabrication of neodymium incorporated copper oxide (Nd2O3 doped CuO) nanoparticles by combustion method for effective degradation of dye, methylene blue (MB). X-ray diffraction (XRD), Field emission Scanning electron microscopy (FESEM), Zeta potential have been applied for characterization. Photocatalyst validity has been evaluated for methylene blue degradation (MB). Test conditions such as time of contact, H2O2, pH, and photo-Fenton have been modified to identify optimal degradation conditions. Noticeably, 7.5% Nd2O3 doped CuO nanoparticle demonstrated the highest photocatalytic efficiency, up to 90.8% in 80 min, with a 0.0227 min−1 degradation rate. However, the photocatalytic efficiency at pH 10 becomes 99% with a rate constant of 0.082 min−1. Cyclic experiments showed the Nd2O3 doped CuO nanoparticle’s stability over repeated use. Scavenge hydroxyl radical species responsible for degradation using 7.5% Nd2O3 doped CuO nanoparticles have been investigated under visible irradiation.

show abstract

“…FTIR, SEM, TEM, Raman spectroscopy, UV-Vis spectroscopy of the nanocomposites were characterized. The band gap was measured for the synthesized nanocomposites [11].…”

Section: Indigo Carminementioning

confidence: 99%

A review on photodegradation of various dyes using photocatalysts

Lydia¹,

G²

2019

International Journal of Advanced Scientific Research and Management

View full text Add to dashboard Cite

Photocatalytic degradation is a recent capable technique for reducing the effects of various dyes and pesticides. The response of the spectroscopic data at the ultraviolet range is 200-350nm; whereas, researchers have attempted to raise the spectral range to 350-800nm, which is a visible light range of the spectrum. Therefore, photodegradation of the effluents can happen efficiently in the visible light range of the spectrum using doped or undoped photocatalysts. Photocatalytic degradation of many dyes has been investigated in the earlier and present times based on many photocatalysts, which is reviewed in this paper. The effects have been examined using spectroscopic and analytical methods of modern technology.

show abstract

Photocatalytic degradation of indigo carmine using Nd-doped TiO2-decorated graphene oxide nanocomposites

Cited by 50 publications

References 57 publications

MWCNTs attached neodymium doped-ZnO photocatalysts for efficient removal of dyes from wastewater

MWCNTs attached neodymium doped-ZnO photocatalysts for efficient removal of dyes from wastewater

The Photocatalytic Performance of Nd2O3 Doped CuO Nanoparticles with Enhanced Methylene Blue Degradation: Synthesis, Characterization and Comparative Study

A review on photodegradation of various dyes using photocatalysts

Contact Info

Product

Resources

About