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Low-Temperature Microwave-Assisted Hydrothermal Synthesis of Pb2Ti2O5.4F1.2 Photocatalyst for Improved H2 Evolution under Visible Light AITranslate

Kenta Aihara; Ryusuke Mizuochi; Megumi Okazaki; Shunta Nishioka; Shuhei Yasuda; Toshiyuki Yokoi; Fumitaka Ishiwari; Akinori Saeki; Miki Inada; Kazuhiko Maeda;
Tokyo Institute of Technology; Tokyo Institute of Technology; Tokyo Institute of Technology; Tokyo Institute of Technology; Tokyo Institute of Technology; Tokyo Institute of Technology; Osaka University; Osaka University; Kyushu University; Tokyo Institute of Technology
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Publisher: ACS
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Abstract AITranslate

Mixed-anion compounds are promising candidates as visible-light-driven photocatalysts; however, their synthesis is generally difficult compared to that of their ordinary single-anion counterparts such as oxides. This difficulty is often an obstacle in maximizing the performance of mixed-anion photocatalysts. In this work, Pb2Ti2O5.4F1.2 particles having a well-defined octahedral shape were successfully synthesized by a microwave-assisted hydrothermal (MHT) method at 473 K. The MHT-Pb2Ti2O5.4F1.2 exhibited a greater specific surface area and improved hydrophilicity compared with its analogue synthesized by a conventional solid-state reaction (SSR). Compared with the SSR-Pb2Ti2O5.4F1.2, the MHT-Pb2Ti2O5.4F1.2 exhibited 6-fold greater activity toward visible-light H2 evolution from water. A postheating treatment of the MHT-derived material in air at 573 K further improved its activity 3–4 fold. The optimized MHT-Pb2Ti2O5.4F1.2 also achieved a nonsacrificial H2 evolution in the presence of a reversible electron donor.

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DOI：https://doi.org/10.1021/acsmaterialslett.3c00574

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Citation Information:

Mixed-anion compounds are promising candidates as visible-light-driven photocatalysts; however, their synthesis is generally difficult compared to that of their ordinary single-anion counterparts such as oxides. This difficulty is often an obstacle in maximizing the performance of mixed-anion photocatalysts. In this work, Pb2Ti2O5.4F1.2 particles having a well-defined octahedral shape were successfully synthesized by a microwave-assisted hydrothermal (MHT) method at 473 K. The MHT-Pb2Ti2O5.4F1.2 exhibited a greater specific surface area and improved hydrophilicity compared with its analogue synthesized by a conventional solid-state reaction (SSR). Compared with the SSR-Pb2Ti2O5.4F1.2, the MHT-Pb2Ti2O5.4F1.2 exhibited 6-fold greater activity toward visible-light H2 evolution from water. A postheating treatment of the MHT-derived material in air at 573 K further improved its activity 3–4 fold. The optimized MHT-Pb2Ti2O5.4F1.2 also achieved a nonsacrificial H2 evolution in the presence of a reversible electron donor.

quote

GB/T 7714-2015 [1] Kenta Aihara, Ryusuke Mizuochi, Megumi Okazaki, et al. ACS Materials Letters, 2023(5). DOI:10.1021/acsmaterialslett.3c00574.
MLA [1] Kenta Aihara, et al., ACS Materials Letters, no. 5, 2023, https://doi.org/10.1021/acsmaterialslett.3c00574.
APA [1] Kenta Aihara, Ryusuke Mizuochi, Megumi Okazaki, Shunta Nishioka, Shuhei Yasuda, Toshiyuki Yokoi, Fumitaka Ishiwari, Akinori Saeki, Miki Inada, & Kazuhiko Maeda. (2023). ACS Materials Letters(5). https://doi.org/10.1021/acsmaterialslett.3c00574
IEEE [1] Kenta Aihara, Ryusuke Mizuochi, Megumi Okazaki, Shunta Nishioka, Shuhei Yasuda, Toshiyuki Yokoi, Fumitaka Ishiwari, Akinori Saeki, Miki Inada, and Kazuhiko Maeda, ACS Materials Letters, no. 5, 2023, doi: 10.1021/acsmaterialslett.3c00574.