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Structure‐Activity Relationship in a Cobalt Aluminate Nanoparticle Cocatalyst with a Graphitic Carbon Nitride Photocatalyst for Visible‐Light Water Oxidation
ChemPhotoChem ( IF 3.0 ) Pub Date : 2020-06-02 , DOI: 10.1002/cptc.202000086 Tomoki Kanazawa 1, 2 , Ryusei Yamaguchi 3 , Tomoki Uchiyama 3 , Daling Lu 4 , Shunsuke Nozawa 5 , Yoshiharu Uchimoto 3 , Kazuhiko Maeda 1
ChemPhotoChem ( IF 3.0 ) Pub Date : 2020-06-02 , DOI: 10.1002/cptc.202000086 Tomoki Kanazawa 1, 2 , Ryusei Yamaguchi 3 , Tomoki Uchiyama 3 , Daling Lu 4 , Shunsuke Nozawa 5 , Yoshiharu Uchimoto 3 , Kazuhiko Maeda 1
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Development of a visible‐light‐driven water oxidation system utilizing a photocatalyst that consists only of earth‐abundant elements is a challenge in artificial photosynthesis. Here the structure of nanoparticulate cobalt aluminate spinel (CoAl2O4) dispersed on a graphitic carbon nitride (g‐C3N4) photocatalyst was studied by electron microscopy and X‐ray absorption fine‐structure spectroscopy. The CoAl2O4 nanoparticle, which is a good cocatalyst for visible‐light water oxidation on the g‐C3N4 photocatalyst, was loaded onto the photocatalyst by a reverse micelle method using Co(NO3)2 ⋅ 6H2O and Al(NO)3 ⋅ 9H2O as precursors, followed by heating at elevated temperatures in air. The O2 evolution activity was enhanced with increasing the heating temperature, reaching a plateau at 573–673 K, beyond which it decreased. Physicochemical analyses indicated that the formation of CoAl2O4 spinel nanoparticles with a minimal extent of aggregation was the key factor to obtain high water oxidation activity.
中文翻译：
铝酸钴纳米颗粒助催化剂与可见光水氧化的石墨化氮化碳光催化剂的结构-活性关系
利用仅由富含地球元素的光催化剂开发可见光驱动的水氧化系统是人工光合作用中的一项挑战。通过电子显微镜和X射线吸收精细结构光谱研究了分散在石墨氮化碳（g-C 3 N 4）上的纳米铝酸钴尖晶石（CoAl 2 O 4）的结构。CoAl 2 O 4纳米颗粒是g-C 3 N 4光催化剂上可见光水氧化的良好助催化剂，使用Co（NO 3）2通过反胶束法负载在光催化剂上。 ·将6H 2 O和Al（NO）3 ·9H 2 O作为前驱物，然后在升高的温度下在空气中加热。随着加热温度的升高，O 2的析出活性增强，在573-673 K达到一个稳定水平，超过此温度则降低。理化分析表明，以最小程度的聚集形成CoAl 2 O 4尖晶石纳米颗粒是获得高水氧化活性的关键因素。
更新日期：2020-06-02
中文翻译：
铝酸钴纳米颗粒助催化剂与可见光水氧化的石墨化氮化碳光催化剂的结构-活性关系
利用仅由富含地球元素的光催化剂开发可见光驱动的水氧化系统是人工光合作用中的一项挑战。通过电子显微镜和X射线吸收精细结构光谱研究了分散在石墨氮化碳（g-C 3 N 4）上的纳米铝酸钴尖晶石（CoAl 2 O 4）的结构。CoAl 2 O 4纳米颗粒是g-C 3 N 4光催化剂上可见光水氧化的良好助催化剂，使用Co（NO 3）2通过反胶束法负载在光催化剂上。 ·将6H 2 O和Al（NO）3 ·9H 2 O作为前驱物，然后在升高的温度下在空气中加热。随着加热温度的升高，O 2的析出活性增强，在573-673 K达到一个稳定水平，超过此温度则降低。理化分析表明，以最小程度的聚集形成CoAl 2 O 4尖晶石纳米颗粒是获得高水氧化活性的关键因素。
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