锰氧化物对二氧化钛光吸收和光催化活性的影响

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE) Pub Date : 2012-09-01 DOI:10.1109/OMEE.2012.6464756

L. Kernazhitsky, V. Shymanovska, T. Gavrilko, V. V. Naumov, T. Khalyavka, V. Kshnyakin

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引用次数: 0

摘要

锰含量为13 ~ 16 at的纳米晶钛锰混合氧化物(TMMO)。在锐钛矿或金红石颗粒上采用氢氧化锰沉淀法首次合成。在2.4 ~ 6.0 eV范围内对TMMO的紫外可见吸收光谱进行了研究，结果表明，与纯TiO2相比，锰氧化物的存在使TMMO的吸收强度增加，吸收边明显红移。研究了纯TiO2、Mn2+掺杂TiO2和TMMO在紫外光照射下光催化分解红花染料的光催化活性。Mn2+掺杂TiO2(锐钛矿和金红石)和金红石基TMMO样品的光催化活性有很大提高。

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Influence of manganese oxides on the optical absorption and photocatalytic activities of titanium dioxide

Nanocrystalline titanium-manganese mixed oxides (TMMO) with Mn content of 13–16 at. % were first synthesized by manganese hydroxide precipitation on anatase or rutile particles. UV-vis absorption spectra were investigated in 2.4–6.0 eV region and revealed that compared with pure TiO2 the presence of manganese oxides results in an increase of the absorption intensity and significant red shift of the TMMO absorption edge. Photocatalytic activity of pure TiO2, Mn²⁺ doped TiO2 and TMMO during the photocatalytic decomposition of the safranine dye under UV irradiation was studied. A great improvement of photocatalytic activity is registered for Mn²⁺-doped TiO2 (anatase and rutile), and rutile-based TMMO sample.

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2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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