Amine-functionalized low-cost industrial grade multi-walled carbon nanotubes for the capture of carbon dioxide

Industrial grade multi-walled carbon nanotubes(IG-MWCNTs) are a low-cost substitute for commercially purified multi-walled carbon nanotubes(P-MWCNTs). In this work, IG-MWCNTs were functionalized with tetraethylenepentamine(TEPA) for CO2capture. The TEPA impregnated IG-MWCNTs were characterized with various experimental methods including N2adsorption/desorption isotherms, elemental analysis, X-ray diffraction, Fourier transform infrared spectroscopy and thermogravimetric analysis. Both the adsorption isotherms of IGMWCNTs-n and the isosteric heats of different adsorption capacities were obtained from experiments. TEPA impregnated IG-MWCNTs were also shown to have high CO2adsorption capacity comparable to that of TEPA impregnated P-MWCNTs. The adsorption capacity of IG-MWCNTs based adsorbents was in the range of 2.145 to 3.088 mmol/g, depending on adsorption temperatures. Having the advantages of low-cost and high adsorption capacity, TEPA impregnated IG-MWCNTs seem to be a promising adsorbent for CO2capture from flue gas.

Self-reducing bifunctional Ni-W/SBA-15 catalyst for cellulose hydrogenolysis to low carbon polyols

A series of self-reducing bifunctional Ni-W/SBA-15 catalysts were synthesized using biomass-based carbon source as the reducing agent without conventional further reduction step. The self-reducing catalysts were performed on the hydrogenolysis of cellulose to low carbon polyols. The effects of calcination temperature and metallic loading contents for cellulose hydrogenolysis reaction were investigated detailedly.The optimal calcination temperature was found to be 673 K by TG analysis. The active metal nanoparticles with a better dispersion were observed using SEM and element mapping technology. The yield of low carbon polyols using the catalyst with the receipt of 10%Ni-15%W/SBA-15-673 K can reach as high as68.14%, of which the ethylene glycol(EG) accounts for 61.04%.

Study on the Hydroponic Induction Technology of Bracketplants Roots

[ Objective ] This research was to explore the effect of combined plant hormones on hydroponic bracketplants and m provide some technical guidance for the hydroponic culture of bracketplants. [ Method] Soil-cultured bracketplants in the same growth condition were selected as experimental materials. After treated with different growth hormone combinations with different concentrations, three different kinds of substrates were used for fixed culture. Growth conditions of hydro- ponic bracketplant roots were observed and recorded. [ P-esultl After being treated with the domestication liquid combination of 0.1 × 10 -6 g/L 6-BA ＋ 3. 9× 10-6 g/L NAA, hydroponic bracketplants which fixed by using ceramic substrate was better than others in the number of new roots, root length, root diameter, root activity and other physiological indicators. [ Conclusion] In this research, the effects of plant hormones on the growth of aquatic plant roots were explored, which has important significance to improve the survival rate of hydroponic-cultured plants and expand the hydroponic plant species.