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Visible light responsive metalloporphyrin-sensitized TiO2 nanotube arrays for artificial photosynthesis of methane
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2022-01-12 , DOI: 10.1039/d1re00442e Tongxin Xiao 1, 2 , Ying Chen 1 , Yuning Liang 1
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2022-01-12 , DOI: 10.1039/d1re00442e Tongxin Xiao 1, 2 , Ying Chen 1 , Yuning Liang 1
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The conversion of CO2 and water into valuable chemicals under sunlight irradiation is of great significance for solving the widespread problems of both limited energy sources and global warming. In this work, new artificial photosynthesis was established through a photocatalysis process of reducing CO2 to CH4. A photocatalyst compounded from a porphyrin (metalloporphyrin) and TiO2 nanotube arrays (TiO2NTs) was prepared, and its photocatalytic performance for CO2 reduction under Xe lamp irradiation was studied. Compared with the pure TiO2NTs, the photocatalytic CO2 reduction activity of metalloporphyrin-sensitized TiO2NTs is significantly enhanced. The amount of methane produced with the cobalt tetra(4-carboxyphenyl)porphyrin/TiO2NTs (CoTCPP/TiO2NTs) photocatalyst is about 5.5 times higher than that produced with TiO2NTs alone. The improvement of photocatalytic activity can be ascribed to the enhancement of light absorption ability of CoTCPP/TiO2NTs and the inhibition of electron–hole recombination. Furthermore, according to the results of the photocatalytic and photo(electro)chemical experiments, a probable mechanism for the photoreduction of CO2 over CoTCPP/TiO2NTs is presented.
中文翻译：
可见光响应金属卟啉敏化二氧化钛纳米管阵列用于甲烷的人工光合作用
在阳光照射下将CO 2和水转化为有价值的化学物质对于解决能源有限和全球变暖的普遍问题具有重要意义。在这项工作中，通过将CO 2还原为CH 4的光催化过程建立了新的人工光合作用。制备了一种由卟啉（金属卟啉）和TiO 2纳米管阵列（TiO 2 NTs）复合的光催化剂，并研究了其在氙灯照射下对CO 2还原的光催化性能。与纯TiO 2 NTs相比，金属卟啉敏化TiO 2的光催化CO 2还原活性NTs 显着增强。用四（4-羧基苯基）卟啉钴/TiO 2 NTs（CoTCPP/TiO 2 NTs）光催化剂产生的甲烷量比单独用TiO 2 NTs产生的甲烷量高约5.5倍。光催化活性的提高可归因于 CoTCPP/TiO 2 NTs 光吸收能力的增强和电子-空穴复合的抑制。此外，根据光催化和光（电）化学实验的结果，提出了在 CoTCPP/TiO 2 NTs上光还原 CO 2的可能机制。
更新日期：2022-01-12
中文翻译：
可见光响应金属卟啉敏化二氧化钛纳米管阵列用于甲烷的人工光合作用
在阳光照射下将CO 2和水转化为有价值的化学物质对于解决能源有限和全球变暖的普遍问题具有重要意义。在这项工作中，通过将CO 2还原为CH 4的光催化过程建立了新的人工光合作用。制备了一种由卟啉（金属卟啉）和TiO 2纳米管阵列（TiO 2 NTs）复合的光催化剂，并研究了其在氙灯照射下对CO 2还原的光催化性能。与纯TiO 2 NTs相比，金属卟啉敏化TiO 2的光催化CO 2还原活性NTs 显着增强。用四（4-羧基苯基）卟啉钴/TiO 2 NTs（CoTCPP/TiO 2 NTs）光催化剂产生的甲烷量比单独用TiO 2 NTs产生的甲烷量高约5.5倍。光催化活性的提高可归因于 CoTCPP/TiO 2 NTs 光吸收能力的增强和电子-空穴复合的抑制。此外，根据光催化和光（电）化学实验的结果，提出了在 CoTCPP/TiO 2 NTs上光还原 CO 2的可能机制。
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