OH Radicals and H2O2 Molecules in the Gas Phase near to TiO2 Surfaces

Jerome Thiebaud; Frederic Thevenet; Christa Fittschen

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OH Radicals and H2O2 Molecules in the Gas Phase near to TiO2 Surfaces

机译：靠近TiO2表面的气相中的OH自由基和H2O2分子

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The formation of OH radicals and their diffusion into the gas phase after UV-excitation of TiO2 in the presence of H2O has been studied using the very sensitive and selective detection method of laser-induced fluorescence (LIF). The time-resolved evolution of the OH radical concentration has been observed at different pressures and at varying distances between the photocatalytic surface and the detection volume. H2O2 has been indirectly detected by LIF. The influence of O2, hydrocarbons, and excitation laser wavelength on the evolution of both species profiles has been studied in this work. The quantum yield for the formation of OH and H2O2 has been estimated by comparison with signals obtained after photolysis of H2O2 in the gas phase.

机译：使用非常灵敏和选择性的激光诱导荧光（LIF）检测方法，研究了在存在H2O的情况下TiO2在UV激发下OH自由基的形成及其在气相中的扩散。在不同的压力下以及在光催化表面和检测体积之间的不同距离处，观察到了OH自由基浓度随时间的变化。 LIF已间接检测到H2O2。在这项工作中已经研究了O2，碳氢化合物和激发激光波长对两种物种分布演变的影响。通过与气相中H2O2光解后获得的信号进行比较，可以估算出形成OH和H2O2的量子产率。

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《The journal of physical chemistry, C. Nanomaterials and interfaces》 |2010年第7期|共7页
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Jerome Thiebaud; Frederic Thevenet; Christa Fittschen;
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1. OH Radicals and H2O2 Molecules in the Gas Phase near to TiO2 Surfaces [J] . Jerome Thiebaud, Frederic Thevenet, Christa Fittschen The journal of physical chemistry, C. Nanomaterials and interfaces . 2010,第7期

机译：靠近TiO2表面的气相中的OH自由基和H2O2分子
2. Direct detection of OH radicals diffused to the gas phase from the UV-irradiated photocatalytic TiO2 surfaces by means of laser-induced fluorescence spectroscopy [J] . Murakami Y, Kenji E, Nosaka AY, The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical . 2006,第34期

机译：通过激光诱导荧光光谱法直接检测从紫外线照射的光催化TiO2表面扩散到气相的OH自由基
3. Direct detection of OH radicals diffused to the gas phase from the UV-irradiated photocatalytic TiO2 surfaces by means of laser-induced fluorescence spectroscopy [J] . Murakami Y, Kenji E, Nosaka AY, The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical . 2006,第34期

机译：通过激光诱导荧光光谱法直接检测从紫外线照射的光催化TiO2表面扩散到气相的OH自由基
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OH Radicals and H2O2 Molecules in the Gas Phase near to TiO2 Surfaces

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