A new TiO2 modified film on carbon steel was prepared by electroless plating and sol gel composite process. An artificial neural net was used to optimize the preparing condition of the film. The optimized condition of...A new TiO2 modified film on carbon steel was prepared by electroless plating and sol gel composite process. An artificial neural net was used to optimize the preparing condition of the film. The optimized condition of the TiO2-modified film on carbon steel is as follows： plating time of NiP is 50 min, number of dip coating is 4, heat treatment time is 2 h, and the molar ratio of complexing reagent to Ti（OC4 H9）4 is 1.5 ： 1. Corrosion behavior of carbon steel with coating was investigated by polarization resistance measurement, anode polarization, EIS and ESEM measurement. XPS was used to characterize the element valence of the modified film. Results show that carbon steel with TiO2 modified film has good corrosion resistance in 0.5 mol/L of H2SO4 solution and 0.5 mol/L of NaCl solution. It is also found that the preparing condition of forming TiO2-modified film can be obtained easily by the artificial neural net.展开更多
A new technique for preparing TiO2 modified film on carbon steel was accomplished by electroless plating and sol-gel composite process. The artificial neural network was applied to optimize the preparing condition of ...A new technique for preparing TiO2 modified film on carbon steel was accomplished by electroless plating and sol-gel composite process. The artificial neural network was applied to optimize the preparing condition of TiO2 modified film. The optimized condition for forming TiO2 modified film on carbon steel was that NiP plating for 50 min, dip-coating times as 4, heat treatment time for 2 h, and the molar ratio of complexing agent and Ti(OC4HZ9)4 kept 1.5:1. The results showed that TiO2 modified film have good corrosion resistance. The result conformed that it is feasible to design the preparing conditions of TiO2 modified film by artificial neural network.展开更多
通过纳米自组装法合成大孔氧化铝,加入不同摩尔分数的TiO2,制备系列TiO2-Al2O3复合载体FAT1～FAT5。通过BET、XRD、TEM和NH3-TPD等手段对复合载体进行表征,并与纳米自组装氧化铝载体FAT0进行比较。发现FAT3具有最大的比表面积331.68 m^2...通过纳米自组装法合成大孔氧化铝,加入不同摩尔分数的TiO2,制备系列TiO2-Al2O3复合载体FAT1～FAT5。通过BET、XRD、TEM和NH3-TPD等手段对复合载体进行表征,并与纳米自组装氧化铝载体FAT0进行比较。发现FAT3具有最大的比表面积331.68 m^2/g,且载体孔道的均一性较好,此时TiO2和Al2O3具有完整的晶型结构。随着TiO2的增加,Ti-Al键逐渐形成,TiO2在Al2O3表面的分散状态得到有效改善。FAT3具有较高的酸量17.47 m L/g,其中弱酸和中强酸量占总酸比例的93.6%,有利于加氢反应的顺利进行。因此,TiO2的加入对于改善Al2O3的孔结构、晶型结构和表面酸性具有重要作用。当TiO2含量为50%时,复合载体具有最适宜加氢催化的孔道和表面酸性。展开更多
TiO2 nanotubes （TiNT） were prepared by a hydrothermal treatment and modified by three kinds of amines,namely ethylenediamine,polyetherimide and tetraethylenepentamine （TEPA）,to study their CO2 adsorption propertie...TiO2 nanotubes （TiNT） were prepared by a hydrothermal treatment and modified by three kinds of amines,namely ethylenediamine,polyetherimide and tetraethylenepentamine （TEPA）,to study their CO2 adsorption properties from gas streams.The resultant samples were characterized by X-ray diffraction,transmission electron microscopy,and infrared spectroscopy,as well as low temperature N 2 adsorption.CO2 capture was investigated in a dynamic packed column at 30℃.TEPA-modified TiO2 nanotubes showed the highest adsorption capacity of 167.64 mg/g because it had the highest amino-group content among the three amines.CO2 fixation on TiNT impregnated by TEPA was investigated at 30,50,and 70℃,and the adsorption capacity increased slightly with temperature.Following the adsorption step,the sorbents were regenerated by temperature programmed desorption,and the TiNT-TEPA sample,as CO2 sorbent,was found to be readily regenerated and energy-efficient.The cycle test also revealed that the TiNT-TEPA adsorbent is fairly stable,with only a 5% drop in the adsorption capacity after 10 adsorption/desorption cycles.In addition,the CO2 adsorption behavior was investigated with the deactivation model,and which showed an excellent prediction for the TiNT-TEPA breakthrough curves.展开更多
文摘A new TiO2 modified film on carbon steel was prepared by electroless plating and sol gel composite process. An artificial neural net was used to optimize the preparing condition of the film. The optimized condition of the TiO2-modified film on carbon steel is as follows： plating time of NiP is 50 min, number of dip coating is 4, heat treatment time is 2 h, and the molar ratio of complexing reagent to Ti（OC4 H9）4 is 1.5 ： 1. Corrosion behavior of carbon steel with coating was investigated by polarization resistance measurement, anode polarization, EIS and ESEM measurement. XPS was used to characterize the element valence of the modified film. Results show that carbon steel with TiO2 modified film has good corrosion resistance in 0.5 mol/L of H2SO4 solution and 0.5 mol/L of NaCl solution. It is also found that the preparing condition of forming TiO2-modified film can be obtained easily by the artificial neural net.
文摘A new technique for preparing TiO2 modified film on carbon steel was accomplished by electroless plating and sol-gel composite process. The artificial neural network was applied to optimize the preparing condition of TiO2 modified film. The optimized condition for forming TiO2 modified film on carbon steel was that NiP plating for 50 min, dip-coating times as 4, heat treatment time for 2 h, and the molar ratio of complexing agent and Ti(OC4HZ9)4 kept 1.5:1. The results showed that TiO2 modified film have good corrosion resistance. The result conformed that it is feasible to design the preparing conditions of TiO2 modified film by artificial neural network.
文摘通过纳米自组装法合成大孔氧化铝,加入不同摩尔分数的TiO2,制备系列TiO2-Al2O3复合载体FAT1～FAT5。通过BET、XRD、TEM和NH3-TPD等手段对复合载体进行表征,并与纳米自组装氧化铝载体FAT0进行比较。发现FAT3具有最大的比表面积331.68 m^2/g,且载体孔道的均一性较好,此时TiO2和Al2O3具有完整的晶型结构。随着TiO2的增加,Ti-Al键逐渐形成,TiO2在Al2O3表面的分散状态得到有效改善。FAT3具有较高的酸量17.47 m L/g,其中弱酸和中强酸量占总酸比例的93.6%,有利于加氢反应的顺利进行。因此,TiO2的加入对于改善Al2O3的孔结构、晶型结构和表面酸性具有重要作用。当TiO2含量为50%时,复合载体具有最适宜加氢催化的孔道和表面酸性。
基金supported by the Industry-Academia Cooperation Innovation Fund Projects of Jiangsu Province(No.BY2012025)
文摘TiO2 nanotubes （TiNT） were prepared by a hydrothermal treatment and modified by three kinds of amines,namely ethylenediamine,polyetherimide and tetraethylenepentamine （TEPA）,to study their CO2 adsorption properties from gas streams.The resultant samples were characterized by X-ray diffraction,transmission electron microscopy,and infrared spectroscopy,as well as low temperature N 2 adsorption.CO2 capture was investigated in a dynamic packed column at 30℃.TEPA-modified TiO2 nanotubes showed the highest adsorption capacity of 167.64 mg/g because it had the highest amino-group content among the three amines.CO2 fixation on TiNT impregnated by TEPA was investigated at 30,50,and 70℃,and the adsorption capacity increased slightly with temperature.Following the adsorption step,the sorbents were regenerated by temperature programmed desorption,and the TiNT-TEPA sample,as CO2 sorbent,was found to be readily regenerated and energy-efficient.The cycle test also revealed that the TiNT-TEPA adsorbent is fairly stable,with only a 5% drop in the adsorption capacity after 10 adsorption/desorption cycles.In addition,the CO2 adsorption behavior was investigated with the deactivation model,and which showed an excellent prediction for the TiNT-TEPA breakthrough curves.
