Mesoporous Fe₂O₃-TiO₂ Integrated with Plasmonic Ag Nanoparticles for Enhanced Solar H₂ Production.

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2025-01-19 DOI:10.1002/asia.202401664

Sunesh S Mani, Sivaraj Rajendran, Simi Saju, Bindhya M Babu, Thomas Mathew, Chinnakonda S Gopinath

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引用次数: 0

Abstract

Present work describes a sol-gel assisted one-pot synthesis of mesoporous Fe₂O₃-TiO₂ nanocomposites (TiFe) with different Ti : Fe ratios, and fabrication of Ag-integrated with TiFe nanocomposites (TiFeAg) by a chemical reduction method and demonstrated for high solar H₂ generation activity in direct sunlight. Enhanced solar H₂ production is attributed to the light absorption from entire UV+Visible region of solar spectrum combined with Schottky (Ag-semiconductor) and heterojunctions (TiO₂-Fe₂O₃), as evidenced from HRTEM and various characterization studies. TiFeAg-2 thin film (1 wt % Ag-loaded TiFe-4) displayed the highest activity with a solar H₂ yield of 7.64 mmol h^-1g^-1, which is 48 times higher than that of bare TiO₂ and 5 times higher in thin film form compared to its powder counterpart. Schottky and heterojunctions formed at the interface efficiently separate the charge carriers and increase the hydrogen production activity. The highest H₂ production activity of TiFeAg-2 is partly attributed to the heterogeneous distribution of Fe³⁺ and metallic Ag-species with relatively high Ag/Ti surface atomic ratio. A plausible photocatalytic reaction mechanism on TiFeAg nanocomposite may involve the direct electron transfer from both Fe₂O₃ and TiO₂ to Ag nanoparticles which are subsequently utilized for the reduction of H⁺ to H₂.

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介孔Fe2O3-TiO2与等离子体银纳米粒子集成增强太阳能制氢

本文描述了溶胶-凝胶辅助一锅法合成不同Ti:Fe比的介孔Fe₂O₃-TiO₂纳米复合材料（TiFe），并通过化学还原法制备了ag - TiFeAg纳米复合材料（TiFeAg），并证明了其在阳光直射下具有较高的太阳能产氢活性。正如HRTEM和各种表征研究所证明的那样，太阳能H2生成的增强归因于太阳光谱中整个UV+可见光区域的光吸收，以及肖特基（ag -半导体）和异质结（TiO2-Fe2O3）。TiFeAg-2薄膜（1 wt% ag负载的TiFe-4）表现出最高的活性，其太阳能H2产量为7.64 mmol h⁻¹g⁻¹，是裸tio2的48倍，是粉末tio2的5倍。在界面处形成的肖特基结和异质结有效地分离了载流子，提高了产氢活性。TiFeAg-2的产氢活性最高，部分原因是Fe3+和金属Ag的非均相分布，具有较高的Ag/Ti表面原子比。TiFeAg纳米复合材料的光催化反应机制可能涉及Fe2O3和TiO2向Ag纳米粒子的直接电子转移，而Ag纳米粒子随后被用于将H+还原为H2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).