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The workspace of a robot is an important criterion in evaluating manipulator geometry and kinematic performance. A systematical approach was presented in the paper to computing the shape and size of the workspace of planar robot manipulator. Firstly, a novel algorism based on the Monte Carlo method was proposed to depict the boundary curves of robot… (More)
The mesoporous metal-organic frameworks are a family of materials that have pore sizes ranging from 2 to 50 nm, which have shown promising applications in catalysis, adsorption, chemical sensing and so on. The preparation of mesoporous metal-organic frameworks usually needs the supramolecular or cooperative template strategy. Here we report the… (More)
Cellulose/KI is a very active, selective, stable, and recyclable catalyst for the cycloaddition reactions of CO(2) and epoxides due to the excellent synergetic effect of cellulose and KI. It is found that the hydroxyl groups on the vicinal carbons of cellulose play a key role for the very high efficiency of the catalyst.
CO(2) can be used to separate surfactant and organic solvent completely in various surfactant/solvent solutions without contaminating the surfactants and solvents. We believe that the simple, efficient, and greener method has wide applications.
Here we demonstrate the in situ formation of ultra-small gold nanoparticles (<2 nm) finely dispersed on a binary solid carrier, i.e. a mesoporous SiO2 coated graphene oxide (GO) nanosheet. The as-synthesized Au-SiO2-GO composite has shown high catalytic activity and reusability for chemical reactions under mild conditions.
Exact computation of the workspace of robot manipulator is very important for its optimum design and application. Some analytical methods were proposed to study three dimensional (3D) workspace of robot manipulator. Unfortunately, these methods are not suitable from engineering standpoint due to their complexities in mathematics. In the paper, an integrated… (More)
Mesoporous polymers with tunable large mesopores and thin mesopore walls were synthesized through a CO2-swollen micelle templating route. The mesopore size and porosity properties of the polymers can be easily modulated by adjusting CO2 pressure. The as-synthesized mesocellular polymers are excellent candidate supports for preparing heterogeneous catalysts.
To design high-internal-phase emulsion (HIPE) systems is of great interest from the viewpoints of both fundamental researches and practical applications. Here we demonstrate for the first time the utilization of metal-organic framework (MOF) for HIPE formation. By stirring the mixture of water, oil and MOF at room temperature, the HIPE stabilized by the… (More)