Heterogeneous Photocatalytic Oxidation of Nitrogen Oxides and Sulfur Dioxide in Aqueous Solutions in Connecton with Environmental Pollution

水溶液中氮氧化物和二氧化硫的多相光催化氧化与环境污染的关系

• 批准号: 60550564
• 负责人: HORI Yoshio
• 金额: $ 1.34万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550564/
• 关键词: Air pollution; Airborne dust; Nitrgen oxides; Sulfur dioxide, Semiconductor, Heterogeneous photocatalysis; Oxidation; 不均一系光触媒; 酸化; 【NO(^-_2)】; 【NO(^-_3)】; 【SO(^(-2)_3)】; 光電極反応; 酸性雨

Heterogeneous photocatalytic oxidation of <NO_2^-> was studied in connection with acid rain formation in environmental air. Typical experiments consisted of illuminating <NaNO_2> aqueous solution in a quartz tube with a xenon lamp. The aqueous solution contained semiconductor powders kept in suspension supersonically. <O_2> was bubbled into the aqueous suspensions. <NO_2^-> was quantitatively oxidized to <NO_3^-> with <O_2> under illumination in the presence of some semiconductor powders. Photoactive semiconductor powders in this reaction are <TiO_2> , ZnO, <Ag_2O> , PbO, <Bi_2O_3> , and CdS.Photooxidation of <SO_3^(2-)> in water was also studied in the presence of some semiconductor powders. <SO_3^(2-)> is oxidized to <SO_4^(2-)> in the photocatalytic process. <TiO_2> and <Fe_2O_3> are extremely active photocatalyst for this reaction. Rates of heterogeneous photooxidation of <NO_2^-> were precisely measured in aqueous suspension of <TiO_2> (anatase), <TiO_2> (rutile), and ZnO under illumination. The reaction proceeds in zero order with respect to <NO_2^-> concentration. The rate of photooxidation of <NO_2^-> in cloud water droplets was estimated with hypothetical environmental conditions. The rate amounts to 11% <h^(-1)> for cloud water content of 0.2 g <m^(-3)> .

针对环境空气中酸雨的形成，研究了~lt；NO2^-&gt；的多相光催化氧化。典型的实验包括用氙灯在石英管中照射&lt；NaNO2&gt；水溶液。水溶液中含有超音速悬浮的半导体粉末。&lt；O_2&gt；被鼓泡到水悬浮液中。在某些半导体粉末存在下，&lt；NO_2^-&gt；在光照下被定量氧化为&lt；NO_3^-&gt；。该反应中的光活性半导体粉末是&lt；TiO2&gt；，ZnO，&lt；Ag2O&gt；PbO，&lt；Bi2O3&gt；和CdS。在光催化过程中&lt；SO_3^(2-)&gt；被氧化为&lt；SO_4^(2-)&gt；。&lt；TiO_2&gt；和&lt；Fe_2O_3&gt；是该反应的极具活性的光催化剂。在光照下，精确测量了&lt；二氧化钛&gt；(锐钛矿型)、&lt；二氧化钛&gt；(金红石型)和氧化锌水悬浮液中&lt；NO2^-&gt；的异相光氧化速率。该反应与&lt；NO2^-&gt；浓度呈零级关系。在假设的环境条件下，估算了云雾水滴中~lt；NO2^-&gt；的光氧化速率。当云水含量为0.2g~(-3)~(-3)~(-1)~(-1)~(-1)~(-1)~(-1)；

项目成果

Y.Hori;A.Bandoh;S.Suzuki: Bulletin of Chemical Society of Japan.

Y.Hori；A.Bandoh；S.Suzuki：日本化学会通报。

Y. Hori, A. Bandoh, and S. Suzuki: "Kinetics of Heterogeneous Photocatalytic Oxidation of <NO_2^-> in the presence of <TiO_2> (anatase) Particles" Bulletin of the Chemical Society of Japan.

Y. Hori、A. Bandoh 和 S. Suzuki：“在 <TiO_2>（锐钛矿）颗粒存在下，<NO_2^-> 的非均相光催化氧化动力学”日本化学会通报。

Y.Hori;A.Nakatsu;S.Suzuki: Bulletin of Chemical Society of Japan.

Y.Hori；A.Nakatsu；S.Suzuki：日本化学会通报。

Y.Hori;s.suzuki: Chemistry Letters.

Y.Hori;s.suzuki：化学快报。

Y. Hori, A. Nakatsu, and S. Suzuki: "Electrochemical Investigation of Photocatalytic Oxidation <NO_2^-> at <TiO_2> (anatase) Thin Film Electrode in the Presence of <O_2> " Bulletin of the Chemical Society of Japan.

Y. Hori、A. Nakatsu 和 S. Suzuki：“<O_2> 存在下 <TiO_2>（锐钛矿）薄膜电极上光催化氧化 <NO_2^-> 的电化学研究”日本化学会通报。