以硝酸铝和尿素为原料,通过水热法成功合成富含五配位Al^(3+)的γ-Al_(2)O_(3)载体,采用XRD、SEM、STEM-HAADF、27Al MAS NMR、N_(2)吸附-脱附等手段表征了载体的物理化学性质,并对采用该载体制备的Pd/Al_(2)O_(3)催化剂进行了蒽醌加氢...以硝酸铝和尿素为原料,通过水热法成功合成富含五配位Al^(3+)的γ-Al_(2)O_(3)载体,采用XRD、SEM、STEM-HAADF、27Al MAS NMR、N_(2)吸附-脱附等手段表征了载体的物理化学性质,并对采用该载体制备的Pd/Al_(2)O_(3)催化剂进行了蒽醌加氢制H_(2)O_(2)的初步性能评价。表征结果显示,合成的载体中的五配位Al^(3+)相对含量可达40.88%(w),微观粒子呈棒状,棒的长度1~4μm,直径0.1~0.3μm,BET比表面积可达494 m^(2)/g;所制备的Pd/Al_(2)O_(3)催化剂中Pd纳米粒子分散良好,平均粒径为3.51 nm,且分布较窄。评价结果表明,该催化剂相对于参比剂具有较高的加氢活性。展开更多
The swelling and adsorption properties of the F44-PTU resin for metal ions Cu2+,Pb2+,Cd2+,Hg2+,Pt4+ and Pd2+ were studied, and the adsorption properties and mechanism for nobel metal ions Pt4+ and Pd2+ were studied es...The swelling and adsorption properties of the F44-PTU resin for metal ions Cu2+,Pb2+,Cd2+,Hg2+,Pt4+ and Pd2+ were studied, and the adsorption properties and mechanism for nobel metal ions Pt4+ and Pd2+ were studied especially. The results showed that the resin had the better adsorption properties for Pt4+ and Pd2+ than other metal ions, and also had bigger adsorption velocity. The adsorption process of the resin for Pt4+ fited the langmuir equation, while the adsorption of the resin for Pd2+ fited the Freundich equation. The process of adsorption of the resin for Pt4+ and Pd2+ were all exothermic.展开更多
以4-溴-1,8-萘二甲酸酐为原料,经亚胺化、酯化等反应,设计合成了一种新的乙烯基荧光功能单体N-甲基丙烯酰氧乙基-4-溴-1,8-萘酰亚胺(NPMA),并用此单体与N-异丙基丙烯酰胺(NIPAAm)通过自由基聚合制备了荧光共聚物PⅠ、PⅡ和PⅢ。采用1 H ...以4-溴-1,8-萘二甲酸酐为原料,经亚胺化、酯化等反应,设计合成了一种新的乙烯基荧光功能单体N-甲基丙烯酰氧乙基-4-溴-1,8-萘酰亚胺(NPMA),并用此单体与N-异丙基丙烯酰胺(NIPAAm)通过自由基聚合制备了荧光共聚物PⅠ、PⅡ和PⅢ。采用1 H NMR(核磁共振氢谱)、UV-vis(紫外-可见)光谱和荧光光谱对共聚物的结构及性能进行了表征,结果表明聚合物对金属Pd2+具有高灵敏度的选择性识别作用。展开更多
文摘以硝酸铝和尿素为原料,通过水热法成功合成富含五配位Al^(3+)的γ-Al_(2)O_(3)载体,采用XRD、SEM、STEM-HAADF、27Al MAS NMR、N_(2)吸附-脱附等手段表征了载体的物理化学性质,并对采用该载体制备的Pd/Al_(2)O_(3)催化剂进行了蒽醌加氢制H_(2)O_(2)的初步性能评价。表征结果显示,合成的载体中的五配位Al^(3+)相对含量可达40.88%(w),微观粒子呈棒状,棒的长度1~4μm,直径0.1~0.3μm,BET比表面积可达494 m^(2)/g;所制备的Pd/Al_(2)O_(3)催化剂中Pd纳米粒子分散良好,平均粒径为3.51 nm,且分布较窄。评价结果表明,该催化剂相对于参比剂具有较高的加氢活性。
文摘The swelling and adsorption properties of the F44-PTU resin for metal ions Cu2+,Pb2+,Cd2+,Hg2+,Pt4+ and Pd2+ were studied, and the adsorption properties and mechanism for nobel metal ions Pt4+ and Pd2+ were studied especially. The results showed that the resin had the better adsorption properties for Pt4+ and Pd2+ than other metal ions, and also had bigger adsorption velocity. The adsorption process of the resin for Pt4+ fited the langmuir equation, while the adsorption of the resin for Pd2+ fited the Freundich equation. The process of adsorption of the resin for Pt4+ and Pd2+ were all exothermic.
文摘以4-溴-1,8-萘二甲酸酐为原料,经亚胺化、酯化等反应,设计合成了一种新的乙烯基荧光功能单体N-甲基丙烯酰氧乙基-4-溴-1,8-萘酰亚胺(NPMA),并用此单体与N-异丙基丙烯酰胺(NIPAAm)通过自由基聚合制备了荧光共聚物PⅠ、PⅡ和PⅢ。采用1 H NMR(核磁共振氢谱)、UV-vis(紫外-可见)光谱和荧光光谱对共聚物的结构及性能进行了表征,结果表明聚合物对金属Pd2+具有高灵敏度的选择性识别作用。
