为优化碲化铋(Bi_(2)Te_(3))纳米材料的制备工艺,以BiCl_(3)和Na_(2)TeO_(3)为前驱体,乙二醇为溶剂和还原剂,采用搅拌辅助溶剂热合成法制备了六边形Bi_(2)Te_(3)纳米片。利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对合成的Bi_(2)Te_(3...为优化碲化铋(Bi_(2)Te_(3))纳米材料的制备工艺,以BiCl_(3)和Na_(2)TeO_(3)为前驱体,乙二醇为溶剂和还原剂,采用搅拌辅助溶剂热合成法制备了六边形Bi_(2)Te_(3)纳米片。利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对合成的Bi_(2)Te_(3)纳米片进行物相分析和形貌观察,系统地研究了反应温度、NaOH和聚乙烯吡咯烷酮(PVP)的添加量、搅拌速率及反应时间对合成Bi_(2)Te_(3)纳米片的影响。结果表明上述工艺参数对Bi_(2)Te_(3)纳米片形貌均有显著影响,最终将含有0.315 g BiCl_(3)、0.332 g Na_(2)TeO_(3)、0.4 g NaOH和0.5 g PVP的50 mL乙二醇反应液,以200℃的反应温度和500 r/min的搅拌速率反应4 h,制备出表面光滑、形貌规则、尺寸均匀的六边形Bi_(2)Te_(3)纳米片,纳米片的平均边长约为450 nm。展开更多
The crystallite and thin film of (Zn,Hg)S at different solvents were prepared by thermolysis of thiocyanoto complexes. The samples were characterized by X ray diffraction (XRD), transmission electron microscopy (TEM) ...The crystallite and thin film of (Zn,Hg)S at different solvents were prepared by thermolysis of thiocyanoto complexes. The samples were characterized by X ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results of these studies show that the properties of solvents are important in controlling the sizes and shapes of the final products.展开更多
采用溶剂热合成法制得[Zn(ipa)(4,4′-bipy)·H_(2)O]_(n)(1).实验以六水合硝酸锌Zn(NO_(3))_(2)·6H_(2)O、间苯二甲酸(H_(2)ipa)、DMF(N,N′-二甲基甲酰胺)、4,4′-联吡啶(4,4′-bpy)为原料(ipa^(2-)=间苯二甲酸根,bipy=联吡...采用溶剂热合成法制得[Zn(ipa)(4,4′-bipy)·H_(2)O]_(n)(1).实验以六水合硝酸锌Zn(NO_(3))_(2)·6H_(2)O、间苯二甲酸(H_(2)ipa)、DMF(N,N′-二甲基甲酰胺)、4,4′-联吡啶(4,4′-bpy)为原料(ipa^(2-)=间苯二甲酸根,bipy=联吡啶),在溶剂热条件下合成金属锌配合物1.采用单晶X-射线衍射法、荧光光谱分析法(FL)、粉末X射线衍射(PX R D)、红外光谱法(FT-IR)和热重分析法(T GA)对其结构测定和表征.在配合物1中,Zn(Ⅱ)与4,4′-联吡啶的N原子和ipa^(2-)阴离子的羧基O原子形成六配位的扭曲的八面体结构,进一步扩展形成具有孔道的三维Zn(Ⅱ)金属有机框架(MOF),H_(2)O分子在孔道中.室温下荧光光谱分析表明,当激发波长为365nm时,配合物1在458.6nm处具有最强的发射峰.展开更多
文摘为优化碲化铋(Bi_(2)Te_(3))纳米材料的制备工艺,以BiCl_(3)和Na_(2)TeO_(3)为前驱体,乙二醇为溶剂和还原剂,采用搅拌辅助溶剂热合成法制备了六边形Bi_(2)Te_(3)纳米片。利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对合成的Bi_(2)Te_(3)纳米片进行物相分析和形貌观察,系统地研究了反应温度、NaOH和聚乙烯吡咯烷酮(PVP)的添加量、搅拌速率及反应时间对合成Bi_(2)Te_(3)纳米片的影响。结果表明上述工艺参数对Bi_(2)Te_(3)纳米片形貌均有显著影响,最终将含有0.315 g BiCl_(3)、0.332 g Na_(2)TeO_(3)、0.4 g NaOH和0.5 g PVP的50 mL乙二醇反应液,以200℃的反应温度和500 r/min的搅拌速率反应4 h,制备出表面光滑、形貌规则、尺寸均匀的六边形Bi_(2)Te_(3)纳米片,纳米片的平均边长约为450 nm。
文摘The crystallite and thin film of (Zn,Hg)S at different solvents were prepared by thermolysis of thiocyanoto complexes. The samples were characterized by X ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results of these studies show that the properties of solvents are important in controlling the sizes and shapes of the final products.
文摘采用溶剂热合成法制得[Zn(ipa)(4,4′-bipy)·H_(2)O]_(n)(1).实验以六水合硝酸锌Zn(NO_(3))_(2)·6H_(2)O、间苯二甲酸(H_(2)ipa)、DMF(N,N′-二甲基甲酰胺)、4,4′-联吡啶(4,4′-bpy)为原料(ipa^(2-)=间苯二甲酸根,bipy=联吡啶),在溶剂热条件下合成金属锌配合物1.采用单晶X-射线衍射法、荧光光谱分析法(FL)、粉末X射线衍射(PX R D)、红外光谱法(FT-IR)和热重分析法(T GA)对其结构测定和表征.在配合物1中,Zn(Ⅱ)与4,4′-联吡啶的N原子和ipa^(2-)阴离子的羧基O原子形成六配位的扭曲的八面体结构,进一步扩展形成具有孔道的三维Zn(Ⅱ)金属有机框架(MOF),H_(2)O分子在孔道中.室温下荧光光谱分析表明,当激发波长为365nm时,配合物1在458.6nm处具有最强的发射峰.
