Accumulation Process of Photogenerated Electrons in Titanium(IV) Oxide Photocatalyst Particles: Photoacoustic Infrared Spectroscopy Study
Accumulation Process of Photogenerated Electrons in Titanium(IV) Oxide Photocatalyst Particles: Photoacoustic Infrared Spectroscopy Study
复制标题
二氧化钛光催化剂颗粒中光生电子的积累过程:光声红外光谱研究
DOI:
10.1021/acs.jpcc.2c00603
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发表时间:
2022
期刊:
影响因子:
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通讯作者:
Murakami Naoya
中科院分区:
文献类型:
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作者:
Shinoda Tatsuki;Murakami Naoya
Photoabsorption of trapped electrons in titanium(IV) oxide (TiO2) particles was investigated by using photoacoustic infrared spectroscopy (IR-PAS). During ultraviolet (UV) irradiation, an upward shift of the IR-PAS spectrum appeared as a result of increment of the photoacoustic (PA) signal due to accumulation of trapped electrons at defective sites in TiO2particles. The results for various samples indicated that anatase TiO2(specific surface area (SSA): 11–290 m2g–1) possesses shallower energy trapping sites for electrons than rutile (SSA: 27–114 m2g–1) and brookite TiO2(SSA: 23 m2g–1). Time-course IR-PAS measurements also suggested that the accumulation process of photogenerated electrons in TiO2particles during steady-state UV irradiation depends on the energy depth of electron trapping sites and that the behavior of photogenerated electrons is mainly determined by the crystal structure. Thus, the IR-PAS method is a useful technique for analysis of the generation process and energy depth of trapped electrons in powdered photocatalysts during steady-state excited-light irradiation.
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DOI:
--
发表时间:
2023
期刊:
影响因子:
--
作者:
土屋 拓也;中村 誠;齋藤三郎
通讯作者:
齋藤三郎
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
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影响因子:
5.3
作者:
Nitta, Akio;Takashima, Mai;Ohtani, Bunsho
通讯作者:
Ohtani, Bunsho
影响因子:
3.3
作者:
Szczepankiewicz, SH;Moss, JA;Hoffmann, MR
通讯作者:
Hoffmann, MR