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Effect of Cr3+ concentration and heat treatment on structural property of Cr3+ doped Tio2 nanowires synthesized by hydrothermal method

Chia sẻ: Thuy Thuy | Ngày: | Loại File: PDF | Số trang:10

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Effect of Cr3+ concentration and heat treatment on structural property of Cr3+ doped Tio2 nanowires synthesized by hydrothermal method

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The results showed that the samples heat-treated at low temperature (≤600 ◦C) exhibited anatase phase and for Cr3+-doped anatase TiO2 samples with x ≥ 0.01, Raman spectra showed a new series of peaks at 120, 236, 250, 292, 362, 430, 467 and 550 cm−1 , which were assigned to the localized vibrational modes related to the complexes containing Cr3+ ions. The samples heat-treated at high temperature (1100 ◦C) exhibited rutile phase. It was observed that the characteristic Raman modes (Eg and M) for rutile TiO2 were shifted and broadened with increasing Cr3+ dopant content.

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Nội dung Text: Effect of Cr3+ concentration and heat treatment on structural property of Cr3+ doped Tio2 nanowires synthesized by hydrothermal method

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