Tuning the electronic band alignment properties of TiO2 nanotubes by boron doping

Surah, Shivani Singh; Vishwakarma, Manoj; Kumar, Ritesh; Nain, Ratyakshi; Sirohi, Sidhharth; Kumar, Gulshan

doi:10.1016/j.rinp.2019.01.081

Cited by 33 publications

(13 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The evaluated bandgap of pure anatase TiO 2 is 3.30 eV, which corresponds well to the other literature data [30,31]. On the other hand, a direct interaction between C and Ti atoms on the surface of the NPs caused the bandgap narrowing of the C-TiO 2 as the obtained value was 2.97 eV.…”

Section: Optical Properties Of C-tiosupporting

confidence: 89%

Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles

Matijević

Žakula

Korićanac

et al. 2021

Photochem Photobiol Sci

View full text Add to dashboard Cite

In this study, C-doped TiO 2 nanoparticles (C-TiO 2 ) were prepared and tested as a photosensitizer for visible-light-driven photodynamic therapy against cervical cancer cells (HeLa). X-ray diffraction and Transmission Electron Microscopy confirmed the anatase form of nanoparticles, spherical shape, and size distribution from 5 to 15 nm. Ultraviolet-visible light spectroscopy showed that C doping of TiO 2 enhances the optical absorption in the visible light range caused by a bandgap narrowing. The photo-cytotoxic activity of C-TiO 2 was investigated in vitro against HeLa cells. The lack of dark cytotoxicity indicates good biocompatibility of C-TiO 2 . In contrast, a combination with blue light significantly reduced the survival of HeLa cells: illumination only decreased cell viability by 30% (15 min of illumination, 120 µW power), and 60% when HeLa cells were preincubated with C-TiO 2 . We have also confirmed blue light-induced C-TiO 2 -catalyzed generation of reactive oxygen species in vitro and intracellularly. Oxidative stress triggered by C-TiO 2 /blue light was the leading cause of HeLa cell death. Fluorescent labeling of treated HeLa cells showed distinct morphological changes after the C-TiO 2 /blue light treatment. Unlike blue light illumination, which caused the appearance of large necrotic cells with deformed nuclei, cytoplasm swelling, and membrane blebbing, a combination of C-TiO 2 /blue light leads to controlled cell death, thus providing a better outcome of local anticancer therapy.

show abstract

Section: Optical Properties Of C-tiosupporting

confidence: 89%

Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles

Matijević

Žakula

Korićanac

et al. 2021

Photochem Photobiol Sci

View full text Add to dashboard Cite

show abstract

“…For comparison, previous work reported that the pure TiO 2 nanotubes exhibited an energy gap of 3.3 eV [66]. Therefore, our results showed a slight reduction of bandgap energy by doping TiO 2 with Ag.…”

Section: Uv Analysissupporting

confidence: 64%

Synthesis of Ag decorated TiO₂ nanoneedles for photocatalytic degradation of methylene blue dye

Ridha

Alosfur

Kadhim³

et al. 2021

Mater. Res. Express

View full text Add to dashboard Cite

Water pollution due to the discharge of industrial effluents such as dyes is a serious concern that requires a potential remedy. In this context, photocatalysis is a potent and ecofriendly strategy to degrade these toxic water effluents. In this study, a novel approach to prepare TiO2 nanoneedles decorated with Ag nanoparticles is reported. The sample was prepared using modified photodeposition and was annealed at 400 °C. The X-ray diffraction (XRD) revealed that TiO2 in anatase phase with the presence of Ag were prepared successfully. The corresponding crystalline size of TiO2 and Ag were 6.86 nm and 3.94 nm, respectively. The scanning electron microscopy (SEM) showed that the prepared TiO2 exhibited nanoneedles structure decorated with Ag nanoparticles. The prepared sample exhibited impressive photocatalytic performance toward degrading of 50 ppm Methyl Blue (MB) in the presence of UV irradiation. Using catalyst dose of 4 mg the photodegradation efficiency (PDE) reached to 98.7% after 50 min of UV irradiation. This improved photocatalytic activity is attributed to high catalytic activity and surface area of the synthesized Ag decorated TiO2 nanoneedles.

show abstract

“…B atoms 1s peak is seen at 189 eV and can be accepted as B-OH. Additional peaks at 188 eV and 186 eV for the B-O and Ag-O-B respectively [33]. Therefore B atoms 1s peaks for AgB13 con rm the peak at 186 eV indicates the boron element in the sample (Fig.…”

Section: Surface Characterization With Ft-ir and Xps Analysismentioning

confidence: 68%

“…Peaks for the CuB13 structure has symmetrical shape with satellite peaks. Two satellite peaks were detected as bigger energy value for Cu 2p peaks [32][33][34][35][36]. B 1s core spectra shows the main peak positions at 192 eV due to boron-oxo species in Fig.…”

Section: Surface Characterization With Ft-ir and Xps Analysismentioning

confidence: 95%

Characterization and Antibacterial Properties of Metal Borates Vectorized As Ceramic Glaze Additives

Aguş

Arslan

Abalı

2021

Preprint

View full text Add to dashboard Cite

Metal borate nanoparticles Silver (Ag), copper (Cu) and Zinc (Zn) were produced for a novel boron containing antibacterial ceramic applications. Different concentration, temperature, time parameters were varied for obtaining hierarchical metal borate embedded formulations. Synthesized nanostructures showed interesting crystalline and optical properties since temperature and concentration adjustments provided correlated shape and surface properties. Chemical analysis and crystallinity of both copper and silver formulations were defined using XRD and confirmed that temperature plays a deep role on the production of nanostructures. XPS analysis together with TEM investigations comprehensively provided all atomic compositions with their corresponding energy values in survey and high resolution region. Morphology and atomic purity was analyzed using EDX and SEM measurements revealed the morphological orientation of the nanostructures without other impurities. FT-IR and UV-Vis spectroscopy provided optical information about the obtained metal borate nanoparticles. Finally metal borate nanoparticles were utilized for 1x1 cm ceramic glazing samples for antibacterial applications. Silver borate nanoparticles were found to be more active in low concentrations than copper and zinc borate structures after the antibacterial test results were unveiled against to gram positive and gram negative microorganisms.

show abstract

Tuning the electronic band alignment properties of TiO2 nanotubes by boron doping

Cited by 33 publications

References 53 publications

Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles

Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles

Synthesis of Ag decorated TiO₂ nanoneedles for photocatalytic degradation of methylene blue dye

Characterization and Antibacterial Properties of Metal Borates Vectorized As Ceramic Glaze Additives

Contact Info

Product

Resources

About

Tuning the electronic band alignment properties of TiO2 nanotubes by boron doping

Cited by 33 publications

References 53 publications

Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles

Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles

Synthesis of Ag decorated TiO2 nanoneedles for photocatalytic degradation of methylene blue dye

Characterization and Antibacterial Properties of Metal Borates Vectorized As Ceramic Glaze Additives

Contact Info

Product

Resources

About

Synthesis of Ag decorated TiO₂ nanoneedles for photocatalytic degradation of methylene blue dye