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
A high surface area flower-like Ni–Fe layered double hydroxide for electrocatalytic water oxidation reaction
TL;DR: The as-obtained LDH material shows increased electrocatalytic activity and stability toward WOR in alkaline media compared with the materials prepared without a Ni alkoxide precursor or Fe precursor, namely α-Fe2O3 and Ni(OH)2, respectively.
Journal ArticleDOI
Facile synthesis of exfoliated Co–Al LDH–carbon nanotube composites with high performance as supercapacitor electrodes
TL;DR: A novel sandwich-like structured Co-Al LDH-Carbon Nanotube (CNT) composite has been successfully synthesized by the elegant combination between exfoliated Co-al LDH nanosheets and modified CNTs, which was achieved through an electrostatic assembly method.
Journal ArticleDOI
Synthesis of colloidal aqueous suspensions of a layered gadolinium hydroxide: a potential MRI contrast agent
TL;DR: A layered gadolinium hydroxychloride (LGdH) was synthesized from an aqueous solution of GdCl3.6H2O and it is reported that the relaxometry analysis of LGdH suspensions exhibits a sufficient contrast effect for T1 weighted magnetic resonance imaging.
Journal ArticleDOI
Electrostatic self-assembly of MXene and edge-rich CoAl layered double hydroxide on molecular-scale with superhigh volumetric performances
Hao Niu,Xue Yang,Qian Wang,Xiaoyan Jing,Kui Cheng,Kai Zhu,Ke Ye,Guiling Wang,Dianxue Cao,Jun Yan +9 more
TL;DR: In this article, a two-dimensional nanostructured electrode materials with high electrical conductivity, large electrolyte-accessible surface area and more exposed active sites for energy storage applications were synthesized for supercapacitor applications.
Journal ArticleDOI
Deciphering the alternating synergy between interlayer Pt single-atom and NiFe layered double hydroxide for overall water splitting
Wei Chen,Binbin Wu,Yanyong Wang,Wang Zhou,Yingying Li,Tianyang Liu,Chao Xie,Leitao Xu,Shiqian Du,Minglei Song,Dongdong Wang,Yanbo Liu,Yefei Li,Jilei Liu,Yuqin Zou,Ru Chen,Chen Chen,Jianyun Zheng,Yafei Li,Jun Chen,Shuangyin Wang +20 more
TL;DR: In this paper, a general approach to anchor Pt single-atom intercalated in layered double hydroxide (LDH) and decipher the alternating synergy between Pt single atom and Ni3Fe LDH support for overall water splitting is presented.
References
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