Morphological and structural studies of titanate and titania nanostructured materials obtained after heat treatments of hydrothermally produced layered titanate
TL;DR: In this article, the authors used an energy dispersive X-ray spectroscopy (EDX) analyzer and thermogravimetric-differential scanning calorimetry (TG-DSC) to determine thermal stability of titanate and titania nanotubes.
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Abstract: Different types of titanate and titania nanostructured materials have been successfully synthesised and characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and raman spectroscopy. Elemental analysis was determined by energy dispersive X-ray spectroscopy (EDX) analyzer while thermogravimetric-differential scanning calorimetry (TG-DSC) was used to determine thermal stability. In this study, we found that nanotubes were formed during the washing treatment stage with HCl and distilled water. When the pH of the washing solution was 12, sodium titanate nanotubes were obtained, while when the pH of the washing solution was 7, hydrogen titanate nanotubes were obtained. Sodium titanate nanotubes were thermally stable up to 500°C; however, at 700°C, the nanotubes structure transform to solid nanorods. Meanwhile, hydrogen titanate nanotubes decomposed to produce titania nanotubes after heat treatment at 300°C for 2 hours. At 500°C, the tubular structure broke to small segments due to destruction of the nanotube. Further heat treatment at 700°C, led to the destruction and collapse of the nanotubes structure produce titania nanoparticles.
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Citations
Gas sensors based on TiO2 nanostructured materials for the detection of hazardous gases: A review
Xu Tian,Xiuxiu Cui,Tingrun Lai,Jie Ren,Zhichao Yang,Mingjing Xiao,Bingsen Wang,Xuechun Xiao,Yude Wang +8 more
- 07 Jul 2021
TL;DR: In this paper, a detailed discussion of the different dimensional morphologies of TiO2, which affect the gas sensing performance of the sensors, is presented, and several studies have been summarized to demonstrate the comparative sensing properties of different morphologies.
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Photonic nanostructures for solar energy conversion
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Abstract: Photonic nanostructures, manipulating and confining light on the nanometer scale, provide new opportunities to improve the efficiency of solar energy conversion. Optical microcavities confine light to small volumes by resonant recirculation. Plasmonic metal nanostructures with surface plasmon resonances can act as antennas to localize optical energy and control the location of charge carrier generation. Photonic crystals can enhance the interaction of light with a semiconductor. Integrated photonic crystals and the plasmonic effects of micro-structural materials may have a superposition effect in controlling light. Some applications and practical examples with respect to improving the efficiency of solar energy conversion with photonic nanostructures have been reviewed, demonstrating how such structures can enhance light absorption and improve the generation and separation of photoexcited charge carriers in photocatalytic degradation, solar water splitting, photovoltaic devices and CO2 photoreduction. Distinct from other published reviews, we simultaneously discuss several different types of photonic nanostructures in order to show the similarities and differences of photonic structures for solar energy conversion. Furthermore, the combination of different types of photonic nanostructures for developing more efficient solar energy conversion systems is discussed and explored.
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TL;DR: In this article, a new method of synthesis of advanced, functional hybrid materials obtained from TiO2 or TiO 2-SiO2 and lignin has been proposed, which exhibited specific physicochemical and structural properties, which were determined by a number of methods, including scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), FTIR, nitrogen sorption and thermogravimetric analysis.
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Investigation of energy band gap in polymer/ZnO nanocomposites
Haider Mohammed Shanshool,Muhammad Yahaya,Wan Mahmood Mat Yunus,Ibtisam Yahya Abdullah,Ibtisam Yahya Abdullah +4 more
TL;DR: In this article, the authors have shown that the optical band gap of four types of polymer and ZnO nanoparticles have been prepared as flexiable foil by using the casting method and the analysis of energy dispersive X-ray (EDX) is satisfied of the high purity of as-prepared samples.
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