Effect of Cu doping on TiO2 nanoparticles and its photocatalytic activity under visible light

Krishnakumar, V.; Singaram, Boobas; Jeyaram, Jayaprakash; Mani, Rajaboopathi; Han, Bing; Louhi-Kultanen, Marjatta

doi:10.1007/s10854-016-4720-1

Cited by 50 publications

(33 citation statements)

References 47 publications

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“…Doping prevents aggregation between nanoparticles ultimately leading to their stability, longevity as well as intensified reactivity [4]. Hence, TiO 2 nanoparticles have been doped with Ni, Cu, Fe, Mo, N and other metals using hydrolysis, precipitation, sol-gel and other methods for fabrication in the past [5,6,7,8,9,10,11]. Metal-doped TiO 2 nanoparticles serve many environmental remediation purposes like removal of organic dyes and wastes/pollutants owing to their tremendous photocatalytic activity [12].…”

Section: Introductionmentioning

confidence: 99%

Appraisal of Comparative Therapeutic Potential of Undoped and Nitrogen-Doped Titanium Dioxide Nanoparticles

Ahmad

Yang

et al. 2019

Molecules

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Nitrogen-doped and undoped titanium dioxide nanoparticles were successfully fabricated by simple chemical method and characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray (EDX), and transmission electron microscopy (TEM) techniques. The reduction in crystalline size of TiO2 nanoparticles (from 20–25 nm to 10–15 nm) was observed by TEM after doping with N. Antibacterial, antifungal, antioxidant, antidiabetic, protein kinase inhibition and cytotoxic properties were assessed in vitro to compare the therapeutic potential of both kinds of TiO2 nanoparticles. All biological activities depicted significant enhancement as a result of addition of N as doping agent to TiO2 nanoparticles. Klebsiella pneumoniae has been illuminated to be the most susceptible bacterial strain out of various Gram-positive and Gram-negative isolates of bacteria used in this study. Good fungicidal activity has been revealed against Aspergillus flavus. 38.2% of antidiabetic activity and 80% of cytotoxicity has been elucidated by N-doped TiO2 nanoparticles towards alpha-amylase enzyme and Artemia salina (brine shrimps), respectively. Moreover, notable protein kinase inhibition against Streptomyces and antioxidant effect including reducing power and % inhibition of DPPH has been demonstrated. This investigation unveils the more effective nature of N-doped TiO2 nanoparticles in comparison to undoped TiO2 nanoparticles indicated by various biological tests. Hence, N-doped TiO2 nanoparticles have more potential to be employed in biomedicine for the cure of numerous infections.

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Section: Introductionmentioning

confidence: 99%

Appraisal of Comparative Therapeutic Potential of Undoped and Nitrogen-Doped Titanium Dioxide Nanoparticles

Ahmad

Yang

et al. 2019

Molecules

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“…Figure 1 shows the wide-angle XRD patterns of pure TiO 2 and TiO 2 doped with 3, 6, and 9 mol% of each of Cu, Fe, and Ni metals. The XRD patterns of pure TiO 2 and Cu, Fe, and Ni-doped TiO 2 samples showed the dominant structure of anatase phase of the TiO 2 by the presence of crystalline peaks at 2θ of 25.3°, 37.9°, 48.0°, 53.9°, 55.0°, 62.8°, 68.8°, 70.2°, and 75.1°, reflecting the indices of ( 101), ( 004), ( 200), ( 105), ( 211), ( 204), ( 116), (220), and (215) tetragonal TiO 2 anatase phase planes, respectively (Krishnakumar et al 2016). Peak related to precursors was not detected.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Copper, Iron, and Nickel Doped Titanium Dioxide Photocatalysts for Decolorization of Methylene Blue

Qaderi¹,

Mamat²,

Jalil³

2021

JSM

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The visible-light response is a necessary condition for titanium dioxide (TiO2) photocatalyst to function as a visible light active photocatalyst. This condition can be solved by investigation of the bandgaps and the optimization of doping levels of multivalency metal-doped TiO2. In this study, pure and Cu, Fe, and Ni-doped TiO2 photocatalysts were prepared by the sol‐gel method. The photocatalysts were characterized using XRD, FTIR, FESEM, EDX, N2 physisorption, and UV‐Vis spectrophotometry techniques. The XRD patterns of all pure TiO2 and Cu/TiO2, Fe/TiO2, and Ni/TiO2samples showed the dominant structure of the anatase TiO2 phase. The presence of functional groups at the interface of TiO2 particles was showed by FTIR. The FESEM analysis showed that the particle size of the prepared samples was uniform with spherical morphology. EDX results showed that TiO2 has successfully incorporated Cu, Fe, and Ni metals onto its surface. The BET analysis showed that the specific surface area of the doped samples increased with the amount of doping. The optical properties of all samples were carried out using UV-DRS measurements and their obtained bandgap energies were in the range of 3.22 - 3.42 eV. The pure TiO2 displayed more than 98% and 97% decolorization rates for MB solution at the end of irradiation time of 5 h under UV and visible light, respectively. Among the doped samples, 3 mol% Ni/TiO2 and Cu/TiO2 demonstrated the highest photocatalytic activity (97.65%) under UV light and 6 mol% Ni/TiO2 under visible light for MB (96.86%) decolorization.

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“…Therefore, the decreased photocatalytic activity of 2%Cu-TiO 2 and 3%Cu-TiO 2 should not be ascribed to the enhancement of recombination rate. On the other hand, DRS results shows that the absorption of 2%Cu-TiO 2 and 3%Cu-TiO 2 in the ultraviolet region is lower than that of the pure sample, which may be attributed to the fact that the excessive Cu doping content produce more CuO and Cu 2 O clusters on TiO 2 surface, decreasing the light utilization and photocatalytic e ciency [44]. However, if the speci c surface area further increases, the disadvantage caused by CuO and Cu 2 O covering TiO 2 surface can be offset.…”

Section: Pl Analysismentioning

confidence: 95%

“…The authors believe that excessive doping content will generate new recombination centers, which is not conducive to the migration of photogenerated electrons and holes. Correspondingly, it has also been documented that the higher the doping amount, the higher inhibition effect [44][45][46]. The inconsistent results may be caused by different preparation methods and processes.…”

Section: Pl Analysismentioning

confidence: 99%

Preparation and characterization of Cu-doped TiO2 nanomaterials with anatase/rutile/brookite triphasic structure and their photocatalytic activity

Zhu

Zhou

Xia

et al. 2021

J Mater Sci: Mater Electron

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Pure TiO 2 and different concentrations of Cu-doped TiO 2 with anatase/rutile/brookite triphasic structure were successfully synthesized through a simple hydrothermal process and characterized by X-ray diffraction (XRD), Raman, scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), diffuse re ectance spectra (DRS), photoluminescence spectra (PL) and Brunauer-Emmett-Teller surface area (BET). Both pure and Cu-doped TiO 2 show relatively high photocatalytic activity owing to their considerable surface areas. Moreover, the three-phase coexisting structure and the conversion between Cu 2+ and Cu + ions facilitate the separation of photogenerated electrons and holes, which is favorable for photocatalytic performance. 1%Cu-TiO 2 exhibits the highest photocatalytic activity and the degradation degree of rhodamine B (RhB) reaches 93.5% after 30 min, which is higher than that of monophasic/biphasic 1%Cu-TiO 2 . •O 2 − radical is the main active specie, and h + and •OH are subsidiary in the degradation process.

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Effect of Cu doping on TiO2 nanoparticles and its photocatalytic activity under visible light

Cited by 50 publications

References 47 publications

Appraisal of Comparative Therapeutic Potential of Undoped and Nitrogen-Doped Titanium Dioxide Nanoparticles

Appraisal of Comparative Therapeutic Potential of Undoped and Nitrogen-Doped Titanium Dioxide Nanoparticles

Preparation and Characterization of Copper, Iron, and Nickel Doped Titanium Dioxide Photocatalysts for Decolorization of Methylene Blue

Preparation and characterization of Cu-doped TiO2 nanomaterials with anatase/rutile/brookite triphasic structure and their photocatalytic activity

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