Journal ArticleDOI
Synthesis, anion exchange, and delamination of Co-Al layered double hydroxide: assembly of the exfoliated nanosheet/polyanion composite films and magneto-optical studies.
TLDR
This paper describes a systematic study on the synthesis, anion exchange, and delamination of Co-Al layered double hydroxide (LDH), with the aim of achieving fabrication and clarifying the properties of LDH nanosheet/polyanion composite films.Abstract:
This paper describes a systematic study on the synthesis, anion exchange, and delamination of Co-Al layered double hydroxide (LDH), with the aim of achieving fabrication and clarifying the properties of LDH nanosheet/polyanion composite films. Co-Al-CO3 LDH hexagonal platelets of 4 mum in lateral size were synthesized by the urea method under optimized reaction conditions. The as-prepared CO3(2-)-LDH was converted to Cl- -LDH by treating with a NaCl-HCl mixed solution, retaining its high crystallinity and hexagonal platelike morphology. LDHs intercalated with a variety of anions (such as NO3-, ClO4-, acetate, lactate, dodecyl sulfate, and oleate) were further prepared from Cl- -LDH via an anion-exchange process employing corresponding salts. Exchanged products in various anion forms were found to show different delamination behaviors in formamide. Among them, best results were observed for NO3- -LDH in terms of the exfoliating degree and the quality of the exfoliated nanosheets. The delamination gave a pink transparent suspension containing well-defined nanosheets with lateral sizes of up to 2 microm. The resulting nanosheets were assembled layer-by-layer with an anionic polymer, poly(sodium styrene 4-sulfonate) (PSS), onto quartz glass substrates to produce composite films. Magnetic circular dichroism (MCD) measurements revealed that the assembled multilayer films exhibited an interesting magneto-optical response.read more
Citations
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Journal ArticleDOI
Facile in situ Electrosynthesis and High Electrocatalytic Performance of Interconnected Layered Double Hydroxides/Graphene Hybrids for Dopamine Oxidation: A Comparative Study
M. Kaleesh Kumar,M. Kaleesh Kumar,K. C. Swaathini,Niki S. Jha,Shailendra K. Jha,Shailendra K. Jha +5 more
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2D titanoniobate-titaniumcarbide nanohybrid anodes for ultrafast lithium-ion batteries
Jie Zheng,Congli Sun,Rui Xia,Mohammad Mehrali,Yang Wang,Kangning Zhao,Johan E. ten Elshof,Mark Huijben +7 more
TL;DR: In this article, the authors presented the synthesis of 2D HTiNbO5/H-Ti3C2Tx nanohybrid anodes via a combined exfoliation and co-flocculation strategy.
Journal ArticleDOI
Hydroxyl vacancies triggered high methanol oxidation activity of monolayered layered double hydroxides for energy-saving hydrogen production
Bin Liu,Xiao Wang,Sumin Wang,Hui-Qing Peng,Tongyao Xiao,Guihao Liu,Shaobo Bai,Yufei Zhao,Yu-Fei Song +8 more
TL;DR: In this article , a monolayered Ni-based layered double hydroxides (LDHs) enriched with hydroxyl vacancies are synthesized and first applied in the methanol-assisted energy-saving hydrogen production system including independent electrolysis and photovoltaic-electrolysis.
Journal ArticleDOI
Secondary Crystal Growth on a Cracked Hydrotalcite-Based Film Synthesized by the Sol-Gel Method.
TL;DR: The secondary crystal growth method was introduced as a post-treatment process for Mg/Al hydrotalcite-based films synthesized by the sol-gel method, which typically present a cracked morphology.
Journal ArticleDOI
Synthesis and Characterization of Functionalized Multi-walled Carbon Nanotubes/Exfoliated Layered Double Hydroxide Nanosheets Hybrids via Electrostatic Force
TL;DR: In this article, functionalized multi-walled carbon nanotubes (F-MWCNTs) were prepared through grafting melamine and 4, 4′-diphenylether dicarboxylic acid in proper sequence.
References
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Hydrotalcite-type anionic clays: Preparation, properties and applications.
Journal ArticleDOI
Room-Temperature Ferromagnetism in Transparent Transition Metal-Doped Titanium Dioxide
Yuji Matsumoto,Makoto Murakami,T. Shono,Tetsuya Hasegawa,Tomoteru Fukumura,Masashi Kawasaki,Parhat Ahmet,Toyohiro Chikyow,Shin-ya Koshihara,Hideomi Koinuma +9 more
TL;DR: The observation of transparent ferromagnetism in cobalt-doped anatase thin films with the concentration of cobalt between 0 and 8% is reported, indicating the existence of ferromagnetic long-range ordering.
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Magnetic and electric properties of transition-metal-doped ZnO films
TL;DR: In this article, a 3d transition metal-doped ZnO films (n-type Zn1−xMxO) were formed on sapphire substrates using a pulsed-laser deposition technique, and their magnetic and electric properties were examined.
Journal ArticleDOI
Anion-exchange properties of hydrotalcite-like compounds
TL;DR: Ion exchange isotherms between hydrotalcite-like (HT) ions were determined and the spacing and width of the 003 reflection were measured as a function of HT composition as mentioned in this paper.
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