| 1 | Synthesis of bifunctional Pt/MgAPO-5 catalysts and their catalytic performance in the hydrogenation of nitrobenzene to p-aminophenol显示文摘MgAPO-5 molecular sieves have been synthesized using diethylaminoethanol as the templating agent in a wide range of the MgO/Al2O3 ratio.The samples were characterized by XRD,SEM,solid state NMR,FT-IR and NH3-TPD.Using MgAPO-5 as acidic supports,bifunctional Pt/MgAPO-5 catalysts were prepared for hydrogenation of nitrobenzene to p-aminophenol (PAP).The results showed that the MgO/Al2O3 ratios influenced the Mg content and the acidity of MgAPO-5 samples,thereby greatly affecting the catalytic performance of Pt/MgAPO-5 catalysts.The selectivity to PAP over Pt/MgAPO-5 was dependent on the amount of strong acid sites of MgAPO-5.When the MgO/Al2O3 molar ratio was 0.5,the synthesized MgAPO-5 sample exhibited the largest amount of strong acid and a highest PAP yield of 41.1% was achieved over Pt/MgAPO-5 catalyst. | ShuFang Wang YaDan Jin BeiBei He YanJi Wang XinQiang Zhao | 2010 | Science China Chemistry2010，53，7： | 9 |
| 2 | Adsorption of Rhodamine B from Aqueous Solution onto Heat-Activated Sepiolite显示文摘The heat-activated sepiolite,which was prepared using sepiolite by thermal treatment at different temperatures,was used as an absorbent for the removal of rhodamine B(RhB) from aqueous solutions.The structure and morphology of the as-prepared samples were characterized by X-ray diffraction(XRD) and scanning electron microscopy(SEM) techniques,respectively.The adsorption capacity of RhB onto the heat-activated sepiolite has been examined with pH,adsorbent dosage,contact time,initial dye concentration,and temperature.Kinetic studies showed that the equilibrium was attained within 40 min,and the kinetic data were well described by the pseudo-second-order kinetic model.Besides,the experimental data(R 2 >0.999) fitted the Freundlich model better than the Langmuir model.The as-prepared sample showed higher adsorption capacity(8.33 mg/g) for the removal of RhB than that of sepiolite,which could be attributed to more adsorption sites caused by appropriate heat treatment.The adsorbent can be well regenerated by calcination at 400 ℃ for 2 h and regenerated sepiolite did not exhibited significant loss of adsorption activity after five recycles. | WANG Jiquan WANG Daojie ZHANG Gaoke GUO Yadan LIU Jin | 2013 | Wuhan University Journal of Natural Sciences2013，18，3： | 3 |
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