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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！！！！！！！ |
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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
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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
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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