نتایج جستجو برای: layered double hydroxides ldhs

تعداد نتایج: 272292  

2016
Xiaoli Wang Congxiao Shang Gongde Wu Xianfeng Liu Hao Liu

A series of transition metal sulphonato-Schiff base complexes were intercalated into Mg–Al layered-double hydroxides (LDHs). The obtained catalysts were characterized by FTIR, XRD, N2 sorption, SEM and elemental analysis, and then were used in the selective oxidation of glycerol (GLY) using 3% H2O2 as an oxidant. It was found that their catalytic performances were closely related to the loading...

2017
Wei Shi Jingbo Yu Zhijiang Jiang Qiaoling Shao Weike Su

In this paper, the synthesis of a cheap, reusable and ligand-free Pd catalyst supported on MgAl layered double hydroxides (Pd/MgAl-LDHs) by co-precipitation and reduction methods is described. The catalyst was used in Heck reactions under high-speed ball milling (HSBM) conditions at room temperature. The effects of milling-ball size, milling-ball filling degree, reaction time, rotation speed an...

Journal: :Dalton transactions 2014
Juanjuan Ma Lin Liu Shanzhong Li Yonghao Chen Meng Zhuo Feng Shao Junyan Gong Zhiwei Tong

Anionic manganese tetrasulfonatophenyl porphyrin (MnTSPP) has been intercalated into the interlamellar space of Mg-Al and Ni-Al layered double hydroxides (LDHs) through the exfoliation/restacking approach by using exfoliated LDH nanosheets and guest molecules as building blocks. The obtained hybrids were characterized by a variety of analytical techniques such as CHN analysis, XRD, FTIR, SEM, H...

Journal: :Nanoscale 2011
Meixia Li Jun E Zhu Lili Zhang Xu Chen Huimin Zhang Fazhi Zhang Sailong Xu David G Evans

Layered double hydroxides (LDHs), also known as hydrotalcite-like anionic clays, have been investigated widely as promising electrochemical active materials. Due to the inherently weak conductivity, the electrochemical properties of LDHs were improved typically by utilization of either functional molecules intercalated between LDH interlayer galleries, or proteins confined between exfoliated LD...

2014
Meitang Liu Tianlei Wang Hongwen Ma Yu Fu Kunran Hu Chao Guan

In this present report, luminescent ordered multilayer thin films (OMFs) based on oppositely-charged inorganic nanosheets and the different oppositely-charged chromophores were fabricated via layer-by-layer assembly method. Exfoliated layered double hydroxides (LDHs) and montmorillonite (MMT) nanosheets with opposite charges can be expected to provide a pseudo electronic microenvironment (PEM) ...

2016
E. Kuzmann V. K. Garg A. C. de Oliveira L. Herojit Singh S. S. Pati E. M. Guimaraes Tatiane O. dos Santos

Layered double hydroxides (LDHs) are one of the very important nano-carriers for drug delivery, due to their many advantageous features, such as the ease and low-cost of preparation, low cytotoxicity, good biocompatibility, protection for the intercalated drugs, and the capacity to facilitate the uptake of the loaded drug in the cells. In our previous studies, Mössbauer spectroscopy was applied...

Journal: :Molecules 2016
Shirley Nakagaki Karen Mary Mantovani Guilherme Sippel Machado Kelly Aparecida Dias de Freitas Castro Fernando Wypych

Layered materials are a very interesting class of compounds obtained by stacking of two-dimensional layers along the basal axis. A remarkable property of these materials is their capacity to interact with a variety of chemical species, irrespective of their charge (neutral, cationic or anionic). These species can be grafted onto the surface of the layered materials or intercalated between the l...

Journal: :Chemical science 2015
Liqing Song Jingjing Shi Jun Lu Chao Lu

Graphene quantum dots (GQDs) have received much research attention due to their unique optical/electrical/magnetic features. However, the intrinsic relationship between the structure and properties of GQDs remains not fully understood, because the controlled synthesis and the accurate structure determination of GQDs are still a great challenge. Here, single-layered GQDs are successfully obtaine...

2017
Hanjun Wu Huali Zhang Qingxue Yang Dongsheng Wang Weijun Zhang Xiaofang Yang

In this work, calcined chitosan-supported layered double hydroxides (CSLDO) were synthesized through a co-precipitation method that restrained the particles' aggregation of LDHs and exhibited huge specific surface areas, which can enhance the fluoride adsorption capacity. CSLDOs were characterized by physical and chemical methods and used for fluoride adsorption in an aqueous solution. The resu...

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