Advances in porous and high-energy (001)-faceted anatase TiO2 nanostructures

Umar, Akrajas Ali; Saad, Siti Khatijah Md; Umar, Marjoni Imamora Ali; Rahman, Mohd Yusri Abd; Oyama, Munetaka

doi:10.1016/j.optmat.2017.10.002

Cited by 31 publications

(13 citation statements)

References 194 publications

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“…This conclusion c probably be ascribed to the appropriate dispersion of erbium ions in the lattice s of TiO2 [39]. The crystallite size data are listed in Table 2 for TiO2 with Er ions in weight [15]. The lesser increase in the size of the particles confirmed that impregnation in for the Er ions/TiO2 NPs sample.…”

Section: X-ray Diffraction Patternmentioning

confidence: 81%

“…The lesser increase in the size of the particles confirmed that impregnation in for the Er ions/TiO2 NPs sample. The Debye-Scherer equation is used to calcu crystallite size D (Equation ( 5)): The crystallite size data are listed in Table 2 for TiO 2 with Er ions in weight percent [15]. The lesser increase in the size of the particles confirmed that impregnation increased for the Er ions/TiO 2 NPs sample.…”

Section: X-ray Diffraction Patternmentioning

confidence: 99%

“…The TiO 2 photocatalyst is characterized by its ease of synthesis, low cost, nontoxicity, high stability, high band-gap energy (3.2 eV) [15], and applicability for PCD [16]. Despite these qualities, it is now of little use in large-scale processing operations due to its low Nanomaterials 2021, 11, 2190 2 of 12 quantum efficiency and short wavelength excitation.…”

Section: Introductionmentioning

confidence: 99%

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Novel Blue-Wavelength-Blocking Contact Lens with Er3+/TiO2 NPs: Manufacture and Characterization

et al. 2021

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Thermally stable titanium dioxide nanoparticles (TiO2 NPs) doped with erbium ions (Er3+) are characterized by uniformity, low excitation energy, and high surface area. The impregnation methodology was used to enhance the optical properties of TiO2 NPs impregnated with various Er3+ ion contents. The synthesized Er3+/TiO2 samples were characterized by energy dispersive X-ray (EDX), metal mapping, UV–Visible spectrum, field emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD). The Er3+ ions, per our findings, were well-distributed on the TiO2 surface of the anatase phase and there was an insignificant difference in particle size, but there was no change in the particle shapes of the Er3+/TiO2 NPs structure. The maximum band gap degradation occurred with 1.8 wt % of Er3+/TiO2, where the energy gap degraded from 3.13 to 2.63 eV for intrinsic TiO2. The synthesized Er3+/TiO2 samples possess predominantly finely dispersed erbium ion species on the surface. Er3+ ions agglomeration on the surface increased with increasing ions in each sample. We found that 0.6 wt/vol % of Er+3/TiO2 is the best optical coating and produced satisfying results in terms of blocking the transmittance of blue wavelength without reducing the image quality.

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Section: X-ray Diffraction Patternmentioning

confidence: 81%

Section: X-ray Diffraction Patternmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Blue-Wavelength-Blocking Contact Lens with Er3+/TiO2 NPs: Manufacture and Characterization

et al. 2021

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“…In the past several decades of photocatalysis research, nano-TiO 2 as a photocatalyst has been extensively studied due to its low price, non-toxicity, natural abundance, high thermal and chemical stability, and its wide practical application in industry. [1][2][3][4][5][6] However, the bandgap of nano-TiO 2 is relatively wide ($3.0 eV), which severely limits its application in the eld of visible-light photocatalysis. 7 In addition, nano-TiO 2 displays a low quantum efficiency due to the rapid recombination of photogenerated electrons and holes.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of multi-type carbon doped and modified nano-TiO₂ for enhanced visible-light photocatalysis

Wang

Liu

et al. 2020

RSC Adv.

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“…Boyer & Crippen (2014); Bell (2010); and Duran et al (2011) conducted the study of the use of certain methods in learning to bring up 21st-century students' skills in science classes. In other explanations, the studies listed above show that 21st century skills are a "hot" topic in education of science (Geisinger, 2016) besides the research about nanotechnology and graphene in pure science Umar et al, 2017;Umar et al, 2018). Because 21st-century skills required by students to perform their activities in the future (Larson & Miller, 2011), or 21st-century skills are beneficial to their lives after graduation (Kaufman, 2013).…”

Section: Introductionmentioning

confidence: 99%

Revisiting Generic Science Skills as 21st Century Skills on Biology Learning

2018

JPII

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The purpose of this study was to describe the generic skills of students' science who conducted experiments on biology learning grade VIII Junior High School (SMP) in Batusangkar. This study used a descriptive quantitative design. The variables of this research were generic science skills as the 21st-century skills and students achievement. A total of 295 students were used as the populations and the purposive sampling technique was employed to select one class as the research sample (n=32 students). The student activities, such as a direct observation, awareness of scale, logical framework, cause-effect, modeling, and the inference was observed by 6 observers. This activity was designed and adapted based on the generic science skills and 21st-century skills. The percentage of students' achievement and generic science skills score was analyzed with descriptive statistics. The students' achievement showed that all students were successful, with a mean score > 75. The students' generic science skills mean scores was categorized as: very good, good and sufficient, and all students were completed the learning. The highest (very good) performance was on the modeling activities with the average percentage of 87.49%. The results indicated that the skills were considered to be part of generic science skills and 21st-century skills. The results of this study concluded and suggested the need to revisit and reaffirm the inclusion of generic science skills in biology learning because this skill becomes part of or similar to the 21st-century skills.

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Advances in porous and high-energy (001)-faceted anatase TiO2 nanostructures

Cited by 31 publications

References 194 publications

Novel Blue-Wavelength-Blocking Contact Lens with Er3+/TiO2 NPs: Manufacture and Characterization

Novel Blue-Wavelength-Blocking Contact Lens with Er3+/TiO2 NPs: Manufacture and Characterization

Facile synthesis of multi-type carbon doped and modified nano-TiO₂ for enhanced visible-light photocatalysis

Revisiting Generic Science Skills as 21st Century Skills on Biology Learning

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Advances in porous and high-energy (001)-faceted anatase TiO2 nanostructures

Cited by 31 publications

References 194 publications

Novel Blue-Wavelength-Blocking Contact Lens with Er3+/TiO2 NPs: Manufacture and Characterization

Novel Blue-Wavelength-Blocking Contact Lens with Er3+/TiO2 NPs: Manufacture and Characterization

Facile synthesis of multi-type carbon doped and modified nano-TiO2 for enhanced visible-light photocatalysis

Revisiting Generic Science Skills as 21st Century Skills on Biology Learning

Contact Info

Product

Resources

About

Facile synthesis of multi-type carbon doped and modified nano-TiO₂ for enhanced visible-light photocatalysis