Anomalous Phase Transition of Layered Lepidocrocite Titania Nanosheets to Anatase and Rutile

Pu, Yayun; Chen, Qianwen; Sun, Zongzhao; Rodríguez, Paramaconi; Huang, Limin

doi:10.1021/acs.cgd.9b00147

Cited by 9 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2b. In the range of 2θ = 5°~30°, each major diffraction peak is consistent with that of the reported single-layer 2D cobalt doped titania 34,35 . The 2D material can be stably dispersed in an aqueous solution and is convenient for subsequent recombination with carbon dots.…”

Section: Resultssupporting

confidence: 88%

A multifunctional optoelectronic device based on 2D material with wide bandgap

Ding,

Xu,

Liu

et al. 2023

Preprint

View full text Add to dashboard Cite

Low-dimensional materials exhibit unique quantum confinement effects and morphologies as a result of their nanoscale size in one or more dimensions, making them exhibit distinctive physical properties compared to bulk counterparts. Among all low-dimensional materials, due to their atomic level thickness, two-dimensional materials possess extremely large shape anisotropy and consequently are speculated to have large optically anisotropic absorption. In this work, we demonstrate an optoelectronic device based on the combination of two-dimensional material and quantum dot with wide bandgap. High-efficient luminescence of carbon quantum dot and extremely large shape anisotropy (>1500) of two-dimensional material with the wide bandgap of >4 eV cooperatively endow the optoelectronic device with multi-functions of optically anisotropic blue-light emission, visible light modulation, wavelength-dependent ultraviolet-light detection as well as blue fluorescent film assemble. This research opens new avenues for constructing multi-function-integrated optoelectronic devices via the combination of nanomaterials with different dimensions.

show abstract

Section: Resultssupporting

confidence: 88%

A multifunctional optoelectronic device based on 2D material with wide bandgap

Ding,

Xu,

Liu

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Therefore, there is a significant surge in the research for alternative antimicrobial substances that do not lead to the secondary health hazard and environmental threat. Chemical-based disinfection processes such as chlorination and oxidation have also been studied. − However, such processes often result in unwarranted byproducts that lead to secondary pollution in the environment, which again poses a serious threat to human health.…”

Section: Introductionmentioning

confidence: 99%

Highly Dispersed Nanocomposite of AgBr in g-C₃N₄Matrix Exhibiting Efficient Antibacterial Effect on Drought-ResistantPseudomonas putidaunder Dark and Light Conditions

Balapure

Nikhariya

Boppudi

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Synthesis of nanocomposites possessing intimately mixed components is highly challenging to bring out the best possible properties of the materials. The challenge is mainly due to the difficulties associated with controlling the phase segregation of individual components as a result of high interfacial tension between them and cohesive forces within each component during the synthesis. Here, we show a single-step synthesis of representative nanocomposites of g-C 3 N 4 /AgBr through a rationally designed approach, wherein melamine, the precursor of g-C 3 N 4 , has been intimately mixed with the AgBr precursor, silver− tetraoctylammonium bromide. Subsequent calcination of the obtained solid at 500 °C has resulted in the formation of highly dispersed g-C 3 N 4 /AgBr. The key to such a high dispersion lies in the surfactant-based AgBr precursor that minimized the interfacial tension during the process. The AgBr content has been varied between 2 and 20 wt % with respect to the g-C 3 N 4 content. The obtained nanocomposites have been thoroughly characterized using XRD, XPS, ED-XRF, FE-SEM, HR-TEM, DRS, TCSPC, and BET surface area techniques. The studies revealed a high dispersion of AgBr in the g-C 3 N 4 matrix. The nanocomposites have been found to exhibit remarkable antimicrobial properties over a droughtresistant bacterial strain of Pseudomonas putida under both dark and light conditions compared with similar compositions obtained through other methods reported so far. The present study offers a new approach for synthesizing highly dispersed and efficient nanocomposites.

show abstract

“…While HTiNRs did not transform to anatase when exposed to 0.5 M NaOH(aq) (pH > 13, CH-NaOH) and 2 M NH 3 (aq) (pH ∼ 11.8, CH-N2) (Figures and S3), the HTiNRs completely transformed to anatase NRs when hydrothermally treated in 0.5 M ammonia solution (pH ∼ 11.5, CH-N0.5) under otherwise identical reaction conditions (CH-NaOH). Under these conditions, most likely two processes took place: (i) topochemical transformation of titanate to anatase NRs since the morphology was retained and (ii) NH 4 + ions from the reaction mixture exchanged protons at the surface of HTiNRs and caused partial dissolution of the material, which resulted in the deposition of TiO 2 nanocrystals at the surface of the TiO 2 NRs , (Figure ). In this case the amount of NH 4 + ions was too low to stabilize the layered titanate structure.…”

Section: Results and Discussionmentioning

confidence: 99%

Role of Water in the Transformation of Protonated Titanate Nanoribbons to Anatase Nanoribbons

Sluban

Umek

2019

J. Phys. Chem. C

View full text Add to dashboard Cite

Transformation of layered protonated titanate (H 2 Ti 3 O 7 ) nanoribbons to anatase nanoribbons under hydrothermal conditions is a catalyzed process where topotactic transformation and dissolution−recrystallization compete. In the present work, the transformation was achieved with sufficiently high thermal input, calcination, or catalysis when performed under hydrothermal conditions. X-ray diffraction and scanning and transmission electron microscopy combined with crystallography of product materials revealed that the success of catalysis depended on the suspension's pH value as well on the counterions present in the reaction mixture. The process of the transformation from protonated titanate to anatase under hydrothermal conditions is explained for the reaction medium pH range of 1−13.7 with the aid of the ζ-potential of protonated titanate nanoribbons. Protonated titanate nanoribbons were stable under basic conditions, and their transformation to anatase nanoribbons depended on the counterions present in the reaction mixture and their concnetration as well. With decreasing the pH of the reaction mixture, both processestopotactic transformation and dissolution−recrystallizationwere accelerated. Upon the hydrothermal transformation, the nanoribbons served as the substrate for the heterogeneous nucleation of anatase nanocrystals. Sodium titanate nanoribbons were found to be suitable for the transformation to anatase nanoribbons under hydrothermal conditions as well. Presence of water in the reaction mixture was revealed to be crucial for the transformation progress under hydrothermal/solvothermal conditions since used organic solvents served only as a thermal reaction medium and did not promote the catalytic transformation.

show abstract

Anomalous Phase Transition of Layered Lepidocrocite Titania Nanosheets to Anatase and Rutile

Cited by 9 publications

References 24 publications

A multifunctional optoelectronic device based on 2D material with wide bandgap

A multifunctional optoelectronic device based on 2D material with wide bandgap

Highly Dispersed Nanocomposite of AgBr in g-C₃N₄Matrix Exhibiting Efficient Antibacterial Effect on Drought-ResistantPseudomonas putidaunder Dark and Light Conditions

Role of Water in the Transformation of Protonated Titanate Nanoribbons to Anatase Nanoribbons

Contact Info

Product

Resources

About

Anomalous Phase Transition of Layered Lepidocrocite Titania Nanosheets to Anatase and Rutile

Cited by 9 publications

References 24 publications

A multifunctional optoelectronic device based on 2D material with wide bandgap

A multifunctional optoelectronic device based on 2D material with wide bandgap

Highly Dispersed Nanocomposite of AgBr in g-C3N4Matrix Exhibiting Efficient Antibacterial Effect on Drought-ResistantPseudomonas putidaunder Dark and Light Conditions

Role of Water in the Transformation of Protonated Titanate Nanoribbons to Anatase Nanoribbons

Contact Info

Product

Resources

About

Highly Dispersed Nanocomposite of AgBr in g-C₃N₄Matrix Exhibiting Efficient Antibacterial Effect on Drought-ResistantPseudomonas putidaunder Dark and Light Conditions