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KAKEN_17K18886seika.pdf
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半導体ナノ構造表面における気相光触媒反応場の追跡と人工光合成への応用
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ハンドウタイ ナノコウゾウ ヒョウメン ニ オケル キソウ ヒカリ ショクバイ ハンノウバ ノ ツイセキ ト ジンコウ コウゴウセイ エノ オウヨウ
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Handōtai nanokōzō hyōmen ni okeru kisō hikari shokubai hannōba no tsuiseki to jinkō kōgōsei eno ōyō
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Investigation of gas phase photocatalysis on nanostructured semiconductor surfaces and its application toward artificial photosynthesis
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野田, 啓
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ノダ, ケイ
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Noda, Kei
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慶應義塾大学・理工学部 (矢上) ・准教授
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Research team head
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科研費研究者番号 : 30372569
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2020
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科学研究費補助金研究成果報告書
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2019
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半導体ナノ構造表面における気相光触媒反応場の追跡、及び人工光合成（水素生成やCO2光還元）応用に関する研究を実施した。
まず、陽極酸化で作製した酸化鉄ナノチューブアレイ (FNA) 表面に、パルス電着によって酸化銅ナノ粒子 (CNP) を堆積させた試料において、気相メタノールと気相水の混合物を用いて、可視光照射による光触媒水素生成を観測した。その反応過程において、Z-スキーム機構が寄与することを示した。また、陽極酸化で作製した酸化チタンナノチューブアレイ表面にCNPを堆積した試料において、高真空下での光触媒反応場を追跡し、酸化銅ナノ粒子が貴金属フリーの助触媒として機能することを示した。
Gas phase photocatalysis over nanostructured semiconductor surfaces and its application toward artificial photosynthesis such as hydrogen production and CO2 photoreduction were investigated.
Firstly, Composites of anodized hematite (α-Fe2O3) nanotube (FNT) arrays and Cu2O nanoparticles (CNPs) were fabricated using all-electrochemical processes. Hydrogen production from gas phase photocatalytic decomposition of water/methanol mixture over the composite of FNT and CNP was clearly confirmed under visible light irradiation, suggesting that H2 production observed for FNT/CNP can be attributed to Z-scheme mechanism.
In addition, gas-phase photocatalysis over composites of anodized TiO2 oxide nanotube arrays and CNPs was examined in high vacuum. The observation results indicate that electrodeposited CNPs can work as noble-metal-free co-catalyst for gas phase photocatalysis based on nanostructured oxide semiconductors.
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研究種目 : 挑戦的研究 (萌芽)
研究期間 : 2017～2019
課題番号 : 17K18886
研究分野 : 電子・電気材料工学、薄膜・固体物性
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