P25和NaOH水热制备二氧化钛纳米管(TNT)的一系列疑问,请不吝赐教?我根据文献[1]用P25和NaOH水热制备 二氧化钛 纳米管(TNT) 。现在焙烧后获得TNT粉末了,下面的步骤我哦还没展:就是用一种试剂(我选用的是20%的 四乙基氢氧化 铵水溶液)做桥梁的方法 把TiO2和Ce(三价)元素连接起来或者复合包裹也行。问题1:TNT粉末很难分散在20%的四乙基氢氧化铵水溶液,是不是我的粒径比较大的原因,{由于我做的量少,然后损失比较严重(损失了80%),得到的TNT就非常少,我怕研磨太厉害粉体粘在研钵里,损失就更严重,所以只是粗略的把它捣碎},有什么办法让它更好的分散在液相中?问题2:我合成TIO2复合体系的pH值可不可以是碱性的,因为我的溶剂是碱性的。如果不行可以用EDTA( 乙二胺四乙酸 )代替么?问题3:TiO2表面的羟基可不可以和我上面的溶质的某个官能团反应连接起来,温度条件怎么控制?请各位高手帮忙!引用文献: The TNTs were synthesized using aliterature procedure.A mixture of 0.5 g of P25 nanoparticles and30 mL of a 10 M NaOH aqueous solution was stirred at roomtemperature for 10 min. The mixture was then transferred to aTeflon-lined autoclave and heated at 150 C for 24 h. The resultingwhite precipitate was stirred in 250 mL of 0.1 M HCl overnightfollowed by washing with DI water until a pH of 7 was achieved. TheTNT product was then dried at 90 C for 12 h followed by annealingat 350 C for 75 min.查看更多3个回答 . 20人已关注
求大神解释几道光谱学基础题?分析新手遇到一些问题,希望分析帝能帮帮小弟,不胜感激~~能回答1-2道也行,多谢了1. Know the basic processes that occur with lasing. (尽量用一段话说清楚产生激光辐射的基本物理过程,最好稍微详细点)2. Know what factors contribute to greater intensity for stimulated emission, stimulated absorption, collisional excitation, collisional de-excitation, and for spontaneous emission. (每一点分别简单说一下就行,不用很具体)3. Know what situations lead to higher transition probabilities for absorption, fluorescence, and phosphorescence. (写出每一种的答案即可)查看更多1个回答 . 9人已关注