Effect of calcination temperature on the structure and properties of SiO2 microspheres/nano-TiO2 composites

Zhang, Han; Sun, Sijia; Ding, Hao; Deng, Tongrong; Wang, Jie

doi:10.1016/j.mssp.2020.105099

Cited by 17 publications

(7 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then, the water released by the dehydroxylation of the interfaces was further removed during the drying process to form the SiO 2 @TiO 2 (B) nanocomposite. 34 The formation of the SiO 2 @TiO 2 (B) nanocomposite was confirmed with the XRD, TEM, and STEM–EDS ( Figure S1 ) techniques, which will be discussed later. At this point, the nano-SiO 2 was driven to encounter the TiO 2 (B)-surface directly, enhancing the probability of intercontact and reaction.…”

Section: Resultsmentioning

confidence: 70%

“…At this stage, therefore, the chemical combination between SiO 2 nanospheres and nano-TiO 2 nanorods was formed by the interaction of hydroxyl groups on their surfaces. Then, the water released by the dehydroxylation of the interfaces was further removed during the drying process to form the SiO 2 @TiO 2 (B) nanocomposite . The formation of the SiO 2 @TiO 2 (B) nanocomposite was confirmed with the XRD, TEM, and STEM–EDS (Figure S1) techniques, which will be discussed later.…”

Section: Resultsmentioning

confidence: 89%

See 1 more Smart Citation

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO₂ and Sn Nanoparticles Self-Assembled on TiO₂(B) Nanorods for Lithium-Ion Storage Applications

et al. 2021

View full text Add to dashboard Cite

A novel microstructure of anode materials for lithium-ion batteries with ternary components, comprising tin (Sn), rice husk-derived silica (SiO 2 ), and bronze-titanium dioxide (TiO 2 (B)), has been developed. The goal of this research is to utilize the nanocomposite design of rice husk-derived SiO 2 and Sn nanoparticles self-assembled on TiO 2 (B) nanorods, Sn–SiO 2 @TiO 2 (B), through simple chemical route methods. Following that, the microstructure and electrochemical performance of as-prepared products were investigated. The major patterns of the X-ray diffraction technique can be precisely indexed as monoclinic TiO 2 (B). The patterns of SiO 2 and Sn were found to be low in intensity since the particles were amorphous and in the nanoscale range, respectively. Small spherical particles, Sn and SiO 2 , attached to TiO 2 (B) nanorods were discovered. Therefore, the influence mechanism of Sn–SiO 2 @TiO 2 (B) fabrication was proposed. The Sn–SiO 2 @TiO 2 (B) anode material performed exceptionally well in terms of electrochemical and battery performance. The as-prepared electrode demonstrated outstanding stability over 500 cycles, with a high discharge capacity of ∼150 mA h g –1 at a fast-charging current of 5000 mA g –1 and a low internal resistance of around 250.0 Ω. The synthesized Sn–SiO 2 @TiO 2 (B) nanocomposites have a distinct structure, the potential for fast charging, safety in use, and good stability, indicating their use as promising and effective anode materials in better power batteries for the next-generation applications.

show abstract

Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 89%

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO₂ and Sn Nanoparticles Self-Assembled on TiO₂(B) Nanorods for Lithium-Ion Storage Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The FTIR spectra of Fe 3 O 4 /SiO 2 particles showed an absorption band around 1100 cm −1 , which was assigned to the Si-O-Si asymmetric stretching vibration. The band around 800 cm −1 originated from the deformation vibration of Si-O bonds [30], while the band at 950 cm −1 was assigned to the asymmetric bending and stretching vibration of Si-OH [41]. The Fe 3 O 4 /SiO 2 /TiO 2 FTIR spectra showed several bands.…”

Section: Resultsmentioning

confidence: 99%

“…The absorption of light causes the promotion of electron (e − ) from the valence band to the conduction band, which generates a hole (h + ) in the valence band of the photocatalyst. Photocatalytic activity can be further improved by adding various electron scavengers, which react with electrons and prevent the recombination of electronhole pairs, thus enabling the formation of different radicals which degrade pollutants [30]. Balayeva et al [31] and Yu et al [32] developed a new visible-light-sensitive photocatalyst based on TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Rapid Microwave-Assisted Synthesis of Fe3O4/SiO2/TiO2 Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin

et al. 2021

View full text Add to dashboard Cite

In this work, magnetic nanoparticles based on magnetite were successfully prepared via rapid microwave-assisted synthesis. In order to obtain the ternary core–shell Fe3O4/SiO2/TiO2 nanocomposite, first magnetite (Fe3O4) nanoparticles were coated with a protective layer of silica (SiO2) and finally with titania (TiO2). The composite configuration comprising porous and photoactive shells should facilitate the removal of organic micropollutants (OMPs) from water. Furthermore, the magnetic core is critical for processing the management of the photocatalytic powder suspension. The magnetization of the prepared magnetic nanoparticles was confirmed by vibrating-sample magnetometry (VSM), while the structure and morphology of the core–shell nanocomposite were investigated by means of XRD, FTIR, and SEM. Adsorption and photocatalysis were evaluated by investigating the removal efficiency of ciprofloxacin (CIP) as a model OMP using the prepared magnetic core–shell nanocomposite under UV-A light irradiation. It was found that the Fe3O4/SiO2/TiO2 nanocomposite showed good synergistic adsorption and photocatalytic properties. The measurement of iron in eluate confirmed that no leaching occurred during the photocatalytic examination. The recovery of magnetic nanocomposite by an external magnetic field confirmed that the magnetically separated catalyst is highly suitable for recycling and reuse.

show abstract

“…SiO 2 microspheres, a byproduct of the electrofusion process to produce zirconium oxide (ZrO 2 ), mainly consist of spherical amorphous SiO 2 particles. Such a byproduct can meet the requirements as a carrier to load TiO 2 nanoparticles for its high purity, low price, high chemical, and high-temperature thermal stability [ 27 , 28 ]. SiO 2 microspheres produced under high temperature and dry conditions have fewer surface hydroxyl groups, lower reactivity, and a smoother surface than that of SiO 2 prepared in a liquid solution, resulting in its unsatisfying ability to be a substrate.…”

Section: Introductionmentioning

confidence: 99%

Hydrolytic Modification of SiO2 Microspheres with Na2SiO3 and the Performance of Supported Nano-TiO2 Composite Photocatalyst

Wang

et al. 2021

Materials

Self Cite

View full text Add to dashboard Cite

Modified microspheres (SiO2-M) were obtained by the hydrolytic modification of silicon dioxide (SiO2) microspheres with Na2SiO3, and then, SiO2-M was used as a carrier to prepare a composite photocatalyst (SiO2-M/TiO2) using the sol-gel method; i.e., nano-TiO2 was loaded on the surface of SiO2-M. The structure, morphology, and photocatalytic properties of SiO2-M/TiO2 were investigated. Besides, the mechanism of the effect of SiO2-M was also explored. The results show that the hydrolytic modification of Na2SiO3 coated the surface of SiO2 microspheres with an amorphous SiO2 shell layer and increased the quantity of hydroxyl groups. The photocatalytic performance of the composite photocatalyst was slightly better than that of pure nano-TiO2 and significantly better than that of the composite photocatalyst supported by unmodified SiO2. Thus, increasing the loading capacity of nano-TiO2, improving the dispersion of TiO2, and increasing the active surface sites are essential factors for improving the functional efficiency of nano-TiO2. This work provides a new concept for the design of composite photocatalysts by optimizing the performance of the carrier.

show abstract

Effect of calcination temperature on the structure and properties of SiO2 microspheres/nano-TiO2 composites

Cited by 17 publications

References 30 publications

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO₂ and Sn Nanoparticles Self-Assembled on TiO₂(B) Nanorods for Lithium-Ion Storage Applications

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO₂ and Sn Nanoparticles Self-Assembled on TiO₂(B) Nanorods for Lithium-Ion Storage Applications

Rapid Microwave-Assisted Synthesis of Fe3O4/SiO2/TiO2 Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin

Hydrolytic Modification of SiO2 Microspheres with Na2SiO3 and the Performance of Supported Nano-TiO2 Composite Photocatalyst

Contact Info

Product

Resources

About

Effect of calcination temperature on the structure and properties of SiO2 microspheres/nano-TiO2 composites

Cited by 17 publications

References 30 publications

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO2 and Sn Nanoparticles Self-Assembled on TiO2(B) Nanorods for Lithium-Ion Storage Applications

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO2 and Sn Nanoparticles Self-Assembled on TiO2(B) Nanorods for Lithium-Ion Storage Applications

Rapid Microwave-Assisted Synthesis of Fe3O4/SiO2/TiO2 Core-2-Layer-Shell Nanocomposite for Photocatalytic Degradation of Ciprofloxacin

Hydrolytic Modification of SiO2 Microspheres with Na2SiO3 and the Performance of Supported Nano-TiO2 Composite Photocatalyst

Contact Info

Product

Resources

About

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO₂ and Sn Nanoparticles Self-Assembled on TiO₂(B) Nanorods for Lithium-Ion Storage Applications

Fast-Charging Anode Materials and Novel Nanocomposite Design of Rice Husk-Derived SiO₂ and Sn Nanoparticles Self-Assembled on TiO₂(B) Nanorods for Lithium-Ion Storage Applications