All-electrochemical fabrication of α-Fe2O3 nanotube array/Cu2O composites toward visible-light-responsive photocatalysis
All-electrochemical fabrication of α-Fe2O3 nanotube array/Cu2O composites toward visible-light-responsive photocatalysis
复制标题
全电化学制备α-Fe2O3纳米管阵列/Cu2O复合材料的可见光响应光催化
DOI：
10.35848/1347-4065/ab9279
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发表时间：
2020
影响因子：
1.5
通讯作者：
K. Noda
中科院分区：
文献类型：
--
作者：
Hikaru Masegi;Sakiko Imai;S. B. Sadale;K. Noda
采用全电化学方法制备了α-Fe 2 O3纳米管（FNT）阵列与Cu 2 O纳米颗粒（CNPs）的复合材料。乙二醇基含氟化铵电解液两步阳极氧化后的铁箔在氧气气氛中退火后出现富赤铁矿相。通过脉冲电沉积，平均直径为200 nm的P型CNP均匀地沉积到FNT表面上。利用对苯二甲酸的光致发光技术验证了FNT/CNP复合材料在可见光（维斯）照射下增强水中羟基自由基的形成，表明FNT阵列上的助催化剂CNP可以促进FNT表面的光生空穴-电子分离和水的连续氧化。此外，在维斯照射下，清楚地证实了由水/甲醇混合物在FNT/CNP上的气相光催化分解产生氢气，而仅用FNT和仅用CNP未检测到H2。本研究表明，电沉积的碳纳米管可以作为无贵金属的助催化剂，用于基于阳极化的FNT阵列的维斯响应性光催化。
Composites of anodized hematite (α-Fe2O3) nanotube (FNT) arrays and Cu2O nanoparticles (CNPs) were fabricated using all-electrochemical processes. Two-step anodized iron foils with ethylene-glycol-based electrolyte containing ammonium fluoride show hematite-rich phase after post-annealing in oxygen atmosphere. P-type CNPs with an average diameter of 200 nm were deposited uniformly onto the FNT surface by pulse electrodeposition. The enhancement of hydroxyl radical formation in water for the FNT/CNP composite under visible light (VIS) irradiation was verified by photoluminescence technique using terephthalic acid, suggesting that co-catalyst CNPs on FNT arrays may promote photo-generated hole–electron separation and successive water oxidation on FNT surfaces. Furthermore, hydrogen generation from gas phase photocatalytic decomposition of water/methanol mixture over FNT/CNP was clearly confirmed under VIS irradiation, while H2 was not detected with only FNT and only CNP. This study indicates that electrodeposited CNPs can work as noble-metal-free co-catalysts for VIS responsive photocatalysis based on anodized FNT arrays.
影响因子：
2.1
作者：
S. B. Sadale;K. Noda;K. Kobayashi;Hirofumi Yamada;K. Matsushige
通讯作者：
S. B. Sadale;K. Noda;K. Kobayashi;Hirofumi Yamada;K. Matsushige
影响因子：
1.9
作者：
Kobayashi, Satoshi;Ichimura, Masaya
通讯作者：
Ichimura, Masaya