Hydrothermal Synthesis of Nitrogen-Doped Titanium Dioxide and Evaluation of Its Visible Light Photocatalytic Activity

Figure 2

TEM images of (a) NTA, (b) N-NTA-130, (c) N-NTA-160, (d) H-NTA-210, and (e) N-NTA-210.

(a)

(b)

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(d)

(e)