| 查看: 266 | 回复: 3 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
风雨182木虫 (正式写手)
|
[交流]
【求助】请教高手
|
||
|
不同非金属元素掺杂TiO2的透射电镜图见图5-2所示。由图中可以看出，制备的纯TiO2粒径均匀，大小在20 nm左右；N掺杂TiO2中存在两种尺寸的晶粒，结合XRD计算分析，较大的粒径是金红石相，较小的粒径是锐钛矿相；S掺杂TiO2也存在两种晶型，但晶粒尺寸差别不如N掺杂的明显，这可能是因为晶相组成不同造成的；N-S共掺杂TiO2的粒径最小，约在15 nm左右，与计算值（见表5-1）相符。 请不要直接复制翻译软件！！！！！！！ |
回复此楼» 猜你喜欢
288求调剂
已经有6人回复
-
复试调剂
已经有12人回复
-
计算机11408，286分求调剂
已经有3人回复
-
材料专硕322分
已经有8人回复
-
一志愿上海海洋大学083200食品学硕，求调剂，接受其他专业083200
已经有5人回复
-
081200-11408-276学硕求调剂
已经有5人回复
-
材料调剂
已经有10人回复
-
313求调剂
已经有7人回复
-
304求调剂（085602，过四级，一志愿985）
已经有14人回复
-
材料工程302分求调剂
已经有7人回复
★ ★ ★ ★
风雨182(金币+4,VIP+0): 9-26 08:58
风雨182(金币+4,VIP+0): 9-26 08:58
| Figure 5-2 shows the TEM images of TiO2 samples doped with different non-metallic elements. One can see from this figure that highly uniform grain size around 200 nm in diameter can be obtained in the pure TiO2 sample; Two grain sizes can be found in the N-doped sample. With the aids of XRD analyse, the larger grain sizes are the rutile phases, while the smaller are anatase ones; Two different grain sizes are found in the S-doped sample as well. However, the difference between these two sizes is less evident than that in the N-doped ones, which may be due to the different phases in the S-doped sample; The grain size in the N-S co-doped sample is the smallest, about 15 nm in diameter, which is consistent with the calculated one (see Tab.5-1). |
3楼2009-09-25 10:37:45
★ ★ ★ ★ ★ ★ ★
风雨182(金币+7,VIP+0): 9-26 08:58
风雨182(金币+7,VIP+0): 9-26 08:58
| The TEM images of TiO2 samples doped with different non-metallic elements are shown in Fig. 5-2. From the figure, it can be seen that all grains in the pure TiO2 sample are uniform in size which is around 20 nm in diameter; Two grain sizes can be found in the N-doped sample. With the help of XRD measurements, it is found that the large size is ascribed to 金红石相 and the smaller size to 锐钛矿相; Two different grain sizes are also found in the S-doped sample. However, the difference between these two sizes is less than that in the N-doped sample, which may be due to the reason that the phase compositions in the S-doped sample is different from that of N-doped; The grain size in the N-S co-doped sample is the littlest among all samples. It is about 15 nm and it is compatible with the theoretical one (refer to Tab.5-1) |
2楼2009-09-25 07:39:24
wangjianna
金虫 (正式写手)
- 翻译EPI: 8
- 应助: 0 (幼儿园)
- 金币: 606.5
- 散金: 994
- 红花: 2
- 沙发: 2
- 帖子: 450
- 在线: 163.5小时
- 虫号: 840920
- 注册: 2009-09-05
- 性别: MM
- 专业: 有机合成
★ ★ ★ ★
风雨182(金币+4,VIP+0): 9-26 08:58
风雨182(金币+4,VIP+0): 9-26 08:58
| The TEM images of TiO2 samples doped with different non-metallic elements are shown in Fig. 5-2. it can be conclided that the prepared TiO2 sample has the uniform grading, about a diameter of 20 nm. in N-doped sample there are two different grain sizes with the bigger one the rutile phases, while the smalleranatase ones by analysis of XRD. THERE ARE ALSO TWO DIFFERENT SIZES OF grain in S-doped sample However, the difference between these two sizes is less evident than that in the N-doped ones, which may be due to the different phases in the S-doped sample;The grain size in the N-S co-doped sample is the smallest, about 15 nm in diameter, which is consistent with the calculated one (see Tab.5-1). |
4楼2009-09-25 15:27:38
