Peng Qing

Preparation, Morphology Transformation and Magnetic Behavior of Co3O4 Nano-Leaves

A series of cubic phase Co3O4 nano-leaves were prepared via a combined approach of solution reaction and calcination. According to x-ray diffraction and electron microscopy, we find that the Co3O4 grain size increases with calcination temperature. This can induce many gaps in the products. M-T and M-H magnetization measurements reveal the typical antiferromagnetic behavior of nano-leaves. The effective moments of the samples prepared at 300, 400 and 500°C are 5.6, 5.8 and 5.7μB per formula unit (FU), respectively, larger than the bulk value of 4.14μB/FU.

Bimetal catalytic nanomaterials

As one kind of unusual catalytic materials in the industrial catalysis community, the bimetal materials have attracted considerable attentions due to the controlled composition, size and nanostruture of crystals and their promising reasonable controlled catalytic activity in the catalytic reaction. In recent years, the controlled preparation of different kinds of nanomaterials has achieved rapid progress, these nanomaterials with little size and controlled structures are very significant to improve the catalytic activity and study the catalytic mechanism. It is a challenge to design and develop more efficient bimetal catalytic materials with the help of modern nanotechnology. In this review, we discussed the bimetal nanomaterials catalytic activity in kinds of catalytic reaction, and the influence factors of the catalytic activity of these bimetallic nanomaterials in the recent catalytic research progress. Some new promising characterization and research methods were also discussed in the end of the review.

Synthesis of iron oxide-ton oxide-carbon composite nanobelts and their applications in lithium-ion batteries

Fe- and Sn-based oxides have been regarded as promising candidates as anode for lithium-ion batteries. Recently, nanostructures composed of Fe- and Sn-based oxides composites have attracted much attention and intensively investigated. Composite nanobelts with carbon, Fe- and Sn-based oxides have been obtained with α-FeOOH nanobelts as the precursor, and applying Na 2 SnO 3 hydralysis and gluocuse thermal decomposition reactions. Comparing with counterparts, the composite nanobelts with carbon, Fe- and Sn-based oxides delivered excellent rate capability and outstanding cycling stability, due to electrochemical reactivity of Fe- and Sn-based oxides and reduced charge transfer resistance.