Characterization of Titanium-Silicon Binary Oxide Catalysts Prepared by the Sol-Gel Method and Their Photocatalytic Reactivity for the Liquid-Phase Oxidation of 1-Octanol

Hiromi Yamashita; Shinichi Kawasaki; Yuichi Ichihashi; Masaru Harada; Masato Takeuchi; Masakazu Anpo; Gina Stewart; Marye Anne Fox; Catherine Louis; Michel Che

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Characterization of Titanium-Silicon Binary Oxide Catalysts Prepared by the Sol-Gel Method and Their Photocatalytic Reactivity for the Liquid-Phase Oxidation of 1-Octanol

机译：溶胶-凝胶法制备的钛硅二元催化剂的表征及其对1-辛醇液相氧化的光催化反应活性

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Titanium-silicon (Ti/Si) binary oxides having different Ti contents were prepared by the sol-gel method and used as photocatalysts. The photocatalytic reactivity of these catalysts was investigated as a function of the Ti content for the liquid-phase oxidation of 1-octanol to 1-octanal, and it was found to be dramatically enhanced in regions of lower Ti content. In situ photoluminescence, UV-vis reflectance, FT-IR, ESR, XAFS, XRD, and XPS spectroscopic investigations of these Ti/Si binary oxides indicated that the titanium oxide species are highly dispersed in the SiO_2 matrixes and exist in a tetrahedral coordination exhibiting a characteristic photoluminescence spectrum due to the radiative decay from the charge-transfer excited state of the tetrahedrally coordinated titanium oxide species. The good parallel relationship between the yield of the photoluminescence and the specific photocatalytic reactivity of the Ti/Si binary oxides as a function of the Ti content clearly indicates that the high photocatalytic reactivity of the Ti/Si binary oxides having a low Ti content is associated with the high reactivity of the charge-transfer excited state of the isolated titanium oxide species in tetrahedral coordination, [Ti~(3+)-O~-].

机译：通过溶胶-凝胶法制备具有不同Ti含量的钛-硅（Ti / Si）二元氧化物，并将其用作光催化剂。研究了这些催化剂的光催化反应活性与1-辛醇液相氧化成1-辛醇的Ti含量的关系，发现在Ti含量较低的区域，该催化剂的光催化反应活性得到了显着提高。对这些Ti / Si二元氧化物的原位光致发光，紫外可见反射率，FT-IR，ESR，XAFS，XRD和XPS光谱研究表明，二氧化钛物种高度分散在SiO_2基体中，并以四面体配位形式存在。由于四面体配位的二氧化钛物种的电荷转移激发态的辐射衰减而产生的特征性光致发光光谱。 Ti / Si二元氧化物的光致发光产量与比光催化反应活性之间良好的平行关系作为Ti含量的函数清楚地表明，具有低Ti含量的Ti / Si二元氧化物的高光催化反应活性是相关的在四面体配位[Ti〜（3 +）-O〜-]中具有较高的反应活性。

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《The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical》 |1998年第30期|共6页
作者
Hiromi Yamashita; Shinichi Kawasaki; Yuichi Ichihashi; Masaru Harada; Masato Takeuchi; Masakazu Anpo; Gina Stewart; Marye Anne Fox; Catherine Louis; Michel Che;
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中图分类物理化学（理论化学）、化学物理学;
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1. Characterization of Titanium-Silicon Binary Oxide Catalysts Prepared by the Sol-Gel Method and Their Photocatalytic Reactivity for the Liquid-Phase Oxidation of 1-Octanol [J] . Hiromi Yamashita, Shinichi Kawasaki, Yuichi Ichihashi, The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical . 1998,第30期

机译：溶胶-凝胶法制备的钛硅二元催化剂的表征及其对1-辛醇液相氧化的光催化反应活性
2. In-situ investigations of the photoluminescence properties ofSiO2/TiO2binary and Boron-SiO2/TiO2ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene [J] . Kyeong YoulJung, Seung BinPark, MasayaMatsuoka, International Journal of Photoenergy . 2003,第1期

机译：溶胶-凝胶法制备的SiO2 / TiO2二元和硼-SiO2 / TiO2三元氧化物的光致发光性质及其对三氯乙烯氧化分解的光催化反应性
3. Methane oxidation over Pd catalysts supported on binary Al_2O_3-La_2O_3 oxides prepared by the sol-gel method [J] . A. Barrera, S. Fuentes, G. Diaz, Fuel . 2012,第期

机译：溶胶-凝胶法制备的二元Al_2O_3-La_2O_3氧化物负载的Pd催化剂上的甲烷氧化
4. Comparison of promoted alkaline-earth oxide catalysts prepared through evaporation and sol-gel methods by their catalytic performance in propane oxidative dehydrogenation [C] . Diana Filkova, Bistra Savova, Maria Crisan International Federation of European Zeolite Associations Conference . 2008

机译：通过丙烷氧化脱氢催化性能通过蒸发和溶胶 - 凝胶法制备促进碱土氧化物催化剂的比较
5. Spectroscopic characterization of palladium-based catalysts supported on titania prepared by sol-gel for reduction of nitrogen oxides using methane. [D] . Watson, Junko Mitome. 2001

机译：溶胶-凝胶法制得的负载在二氧化钛上的钯基催化剂的光谱表征，用于使用甲烷还原氮氧化物。
6. Photocatalytic Degradation of Diclofenac Using Al2O3-Nd2O3 Binary Oxides Prepared by the Sol-Gel Method [O] . José Eduardo Casillas, Jorge Campa-Molina, Francisco Tzompantzi, 2020

机译：溶胶-凝胶法制备的Al2O3-Nd2O3二元氧化物对双氯芬酸的光催化降解
7. In-situ investigations of the photoluminescence properties of SiO2/TiO2 binary and Boron-SiO2/TiO2 ternary oxides prepared by the sol-gel method and their photocatalytic reactivity for the oxidative decomposition of trichloroethylene [O] . Kyeong Youl Jung, Seung Bin Park, Masaya Matsuoka, 2003

机译：原位研究溶胶 - 凝胶法制备的siO2 / TiO2二元和硼-siO2 / TiO2三元氧化物的光致发光特性及其对三氯乙烯氧化分解的光催化活性

Characterization of Titanium-Silicon Binary Oxide Catalysts Prepared by the Sol-Gel Method and Their Photocatalytic Reactivity for the Liquid-Phase Oxidation of 1-Octanol

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