Fabrication of Hybrid NiO/ACF/TiO<sub>2</sub>Composites and Their Photocatalytic Activity Under Visible Light

Meng, Ze Da; Han, Sangbum; Kim, Doo-Hwan; Park, Chong-Yeon; Oh, Won-Chun

doi:10.4191/kcers.2011.48.3.211

Cited by 2 publications

(2 citation statements)

References 37 publications

(34 reference statements)

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“…Unfortunately, because of its large bandgap (3.2) and low efficiency in degrading dye at its surface its practical applicability seems to be limited. To extend the functionality, modification of the catalysts was attempted by doping them with either metal or non‐metal dopant ions [3–8], making a composite with other oxide semiconductors [9–11] and sensitising TiO 2 with low bandgap semiconductors [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of nickel doping on the optical property and photocatalytic activity of titanium dioxide nanoparticles

Paul¹,

Choudhury²,

Bojja

2013

Micro & Nano Letters

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Titanium dioxide (TiO 2 ) nanoparticles doped with various amounts of nickel were synthesised via a sol-gel method using titanium isopropoxide and nickel nitrate hexahydrate as precursors. The structural characterisation of the nanoparticles were performed by X-ray diffraction and transmission electron microscopy. Energy dispersive X-ray and X-ray photoelectron spectroscopy analyses confirmed the incorporation of nickel ions into the TiO 2 lattice. A remarkable red shift of the absorption edge was achieved by increasing the nickel content. Photoluminescence spectra indicated the quenching of emission intensity on doping. The feasibility of the photocatalytic degradation of bromophenol blue under visible light illumination was studied. The results showed that the catalytic activity is markedly increased by doping nickel ions.1. Introduction: Photocatalytic degradation using semiconductor photocatalysts has generated a great deal of interest in research because of its promise to curb the rapid detoriation of the living environment. Although several semiconductors such as ZnO, Fe 2 O 3 , CdS and SnO 2 have been used, titanium dioxide (TiO 2 ) has been the photocatalyst of choice [1, 2] because of its re-dox efficiency, non-toxicity, photostability and availability. Unfortunately, because of its large bandgap (3.2) and low efficiency in degrading dye at its surface its practical applicability seems to be limited. To extend the functionality, modification of the catalysts was attempted by doping them with either metal or non-metal dopant ions [3][4][5][6][7][8], making a composite with other oxide semiconductors [9-11] and sensitising TiO 2 with low bandgap semiconductors [12].Transition metal (3d)-doped TiO 2 has been found to be a very effective method for tuning the energy levels and surface states of TiO 2 . Dopant ion incorporation induces some shallow donor or acceptor states, prolongs the life time of charge carriers and thereby enhances the catalytic performance of the doped material. Among the various transition metal ion dopants, nickel is found to be a very efficient dopant for TiO 2 as it has improved the photocatalytic activity of the photocatalysts [13,14]. The reason for this enhancement is because of the suppression of electron-hole recombination. The present work reveals how the addition of nickel ions in the TiO 2 matrix affects its optical properties and enhances the degradation of bromophenol blue under visible-light illumination.

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Section: Introductionmentioning

confidence: 99%

Effect of nickel doping on the optical property and photocatalytic activity of titanium dioxide nanoparticles

Paul¹,

Choudhury²,

Bojja

2013

Micro & Nano Letters

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“…In order to overcome the abovementioned defects, metal oxide nanoparticles were doped with bioceramic particles with many applications for medical disinfection, the food industry, and other industries (31)(32)(33). Silicatebased bioactive glasses doped with copper oxide have also been studied due to the importance of copper in osteogenesis (34) and the stimulation of the growth factor FGF-2 in vitro (35).…”

Section: Introductionmentioning

confidence: 99%

Bactericidal Activity of Copper Oxide Nanocomposite/Bioglass for in Vitro Clindamycin Release in Implant Infections Due to Staphylococcus aureus

Alijanian¹,

Talebian²,

Doudi³

2016

Avicenna J Med Biochem

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Background: In recent years, bioactive bioceramics such as bioglass and hydroxyapatite (HA) have been introduced as a remarkable development in the field of medicine due to their bio-adaptability, non-toxicity, and persistence, in vivo. They have many potential applications in the repair of bone defects and hence they have attracted significant interest from scholars. Objectives: The aim of this study was to synthesize inorganic matrix CuO-based bioglasses and evaluate their antibacterial activity against aerobic bacterial infections in bone implants. Methods: Nano-composite samples of silica-based bioactive glass, 60S BG with nano-powder CuO, were synthesized using the sol-gel method and then assessed with regard to their antibacterial properties against Staphylococcus aureus using well diffusion agar. The samples included BG58S (58%SiO2, 36%CaO, 6%P2O5), BG/10CuO (58%SiO2, 26%CaO, 6%P2O5, 10%CuO), and BG/20CuO (48%SiO2, 26%CaO, 6%P2O5, 20%CuO). To evaluate their bioactivity, the prepared samples of BG/20CuO, BG/10CuO, and BG58S were immersed in simulated body fluids (SBF). The surface morphology and structure of the samples before and after immersion in the SBF were characterized using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR), respectively. Then, the BG/20CuO and BG/10CuO samples were loaded in clindamycin, an antibiotic widely used in the treatment of osteomyelitis, and their release profiles were studied in phosphate buffer solution. Results: It was observed that the growth inhibition zone increased through clindamycin release due to the increasing CuO percentage in the nanocomposite of bioactive glass. The bioactivity of the nanocomposite/bioglass with CuO was superior to that of bioglass alone. In this study, the BG/20CuO sample showed a sustained release of clindamycin, which is sufficient for a drug delivery system. Conclusions: Increasing the Cu nanoparticles in bioactive glass samples leads to the release of Cu 2+ , which has a positive effect on the antibacterial mechanism, as well as decreasing the cultured Staphylococcus colonies found on the bioglasses. Therefore, it seems that the nanocomposite/bioglass of CuO is a promising option for aerobic bacterial inhibitor systems in common bone implant infections.

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Fabrication of Hybrid NiO/ACF/TiO₂Composites and Their Photocatalytic Activity Under Visible Light

Cited by 2 publications

References 37 publications

Effect of nickel doping on the optical property and photocatalytic activity of titanium dioxide nanoparticles

Effect of nickel doping on the optical property and photocatalytic activity of titanium dioxide nanoparticles

Bactericidal Activity of Copper Oxide Nanocomposite/Bioglass for in Vitro Clindamycin Release in Implant Infections Due to Staphylococcus aureus

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Fabrication of Hybrid NiO/ACF/TiO2Composites and Their Photocatalytic Activity Under Visible Light

Cited by 2 publications

References 37 publications

Effect of nickel doping on the optical property and photocatalytic activity of titanium dioxide nanoparticles

Effect of nickel doping on the optical property and photocatalytic activity of titanium dioxide nanoparticles

Bactericidal Activity of Copper Oxide Nanocomposite/Bioglass for in Vitro Clindamycin Release in Implant Infections Due to Staphylococcus aureus

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Fabrication of Hybrid NiO/ACF/TiO₂Composites and Their Photocatalytic Activity Under Visible Light